procedural-3d-engine/examples/imgui/main.cpp

/*
 * Procedural 3D Engine
 * Copyright (c) 2025 Your Project
 * 
 * This software is licensed under the MIT License.
 * See LICENSE.md for full license information.
 * 
 * Based on Vulkan examples by Sascha Willems (MIT License)
 */

#include <imgui.h>
#include "vulkanexamplebase.h"
#include "VulkanglTFModel.h"
#include <cmath>
#include <iostream>

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif


// Enhanced Camera System with Maya-style controls
class OrbitCamera {
public:
    // Constructor
    OrbitCamera(glm::vec3 initialPosition = glm::vec3(0.0f, 0.0f, 8.0f), 
                glm::vec3 focusPoint = glm::vec3(0.0f, 0.0f, 0.0f)) {
        m_currentFocusPoint = focusPoint;
        m_targetFocusPoint = focusPoint;
        
        // Calculate initial spherical coordinates from position
        glm::vec3 offset = initialPosition - focusPoint;
        m_currentDistance = glm::length(offset);
        m_targetDistance = m_currentDistance;
        
        // Calculate initial angles
        CartesianToSpherical(initialPosition, focusPoint, m_currentDistance, m_currentAzimuth, m_currentElevation);
        m_targetAzimuth = m_currentAzimuth;
        m_targetElevation = m_currentElevation;
        
        m_currentPosition = initialPosition;
        
        // Set default parameters
        m_fov = 45.0f;
        m_smoothingFactor = 0.1f;
        m_orbitSensitivity = 0.5f;
        m_panSensitivity = 0.00003f;
        m_zoomSensitivity = 0.1f;
        
        // Set constraints
        m_minDistance = 0.5f;
        m_maxDistance = 100.0f;
        m_minElevation = -89.0f;
        m_maxElevation = 89.0f;
        
        m_viewMatrixDirty = true;
    }
    
    // Core camera operations
    void Orbit(float deltaAzimuth, float deltaElevation, float deltaTime) {
        // Apply input to target angles (convert degrees to radians)
        m_targetAzimuth += glm::radians(deltaAzimuth * m_orbitSensitivity);
        m_targetElevation += glm::radians(deltaElevation * m_orbitSensitivity);
        ClampConstraints();
    }
    
    void Pan(float deltaX, float deltaY, float deltaTime) {
        // Get camera's right and up vectors for screen-space panning (like legacy)
        glm::mat4 viewMatrix = GetViewMatrix();
        glm::vec3 right = glm::vec3(viewMatrix[0][0], viewMatrix[1][0], viewMatrix[2][0]);
        glm::vec3 up = glm::vec3(viewMatrix[0][1], viewMatrix[1][1], viewMatrix[2][1]);
        
        // Scale pan speed by distance to focus point for consistent behavior (like legacy)
        float panScale = m_currentDistance * m_panSensitivity;
        
        // Move focus point (like legacy)
        glm::vec3 panOffset = right * deltaX * panScale + up * deltaY * panScale;
        m_targetFocusPoint += panOffset;
    }
    
    void Zoom(float deltaDistance, float deltaTime) {
        // Apply zoom with distance-based scaling for consistent behavior (like legacy)
        m_targetDistance += deltaDistance * m_zoomSensitivity * m_currentDistance * 0.1f;
        m_targetDistance = glm::clamp(m_targetDistance, m_minDistance, m_maxDistance);
    }
    
    void ZoomImmediate(float deltaDistance, float deltaTime) {
        // Apply zoom with immediate response (no smoothing/velocity)
        float zoomAmount = deltaDistance * m_zoomSensitivity * m_currentDistance * 0.1f;
        
        // Set both target AND current immediately (no smoothing)
        m_targetDistance += zoomAmount;
        m_targetDistance = glm::clamp(m_targetDistance, m_minDistance, m_maxDistance);
        m_currentDistance = m_targetDistance;
        m_viewMatrixDirty = true;
    }
    
    void Update(float deltaTime) {
        // Smooth interpolation towards target values
        float lerpFactor = 1.0f - std::pow(m_smoothingFactor, deltaTime);
        
        m_currentDistance = glm::mix(m_currentDistance, m_targetDistance, lerpFactor);
        m_currentAzimuth = LerpAngle(m_currentAzimuth, m_targetAzimuth, lerpFactor);
        m_currentElevation = glm::mix(m_currentElevation, m_targetElevation, lerpFactor);
        m_currentFocusPoint = glm::mix(m_currentFocusPoint, m_targetFocusPoint, lerpFactor);
        
        UpdatePosition();
    }
    
    // Matrix access
    glm::mat4 GetViewMatrix() const {
        if (m_viewMatrixDirty) {
            m_viewMatrix = glm::lookAt(m_currentPosition, m_currentFocusPoint, glm::vec3(0.0f, 1.0f, 0.0f));
            m_viewMatrixDirty = false;
        }
        return m_viewMatrix;
    }
    
    glm::mat4 GetProjectionMatrix(float aspectRatio, float nearPlane = 0.1f, float farPlane = 256.0f) const {
        return glm::perspective(glm::radians(m_fov), aspectRatio, nearPlane, farPlane);
    }
    
    // Getters
    glm::vec3 GetPosition() const { return m_currentPosition; }
    glm::vec3 GetFocusPoint() const { return m_currentFocusPoint; }
    float GetDistance() const { return m_currentDistance; }
    float GetFOV() const { return m_fov; }
    
    // Focus functionality
    void SetFocusToSelection(glm::vec3 selectionCenter, float selectionRadius = 1.0f) {
        m_targetFocusPoint = selectionCenter;
        
        // Adjust distance based on selection size
        if (selectionRadius > 0.0f) {
            float recommendedDistance = selectionRadius * 3.0f; // Good viewing distance
            recommendedDistance = glm::clamp(recommendedDistance, m_minDistance, m_maxDistance);
            m_targetDistance = recommendedDistance;
        }
        
        std::cout << "OrbitCamera: Focus set to selection at (" 
                  << selectionCenter.x << ", " << selectionCenter.y << ", " << selectionCenter.z 
                  << ") with radius " << selectionRadius << std::endl;
    }
    
    void FrameAll(glm::vec3 sceneCenter, float sceneRadius) {
        SetFocusToSelection(sceneCenter, sceneRadius);
    }
    
    // Configuration
    void SetSensitivity(float orbitSens, float panSens, float zoomSens) {
        m_orbitSensitivity = orbitSens;
        m_panSensitivity = panSens;
        m_zoomSensitivity = zoomSens;
    }
    
    void SetSmoothingFactor(float factor) { 
        m_smoothingFactor = glm::clamp(factor, 0.0f, 1.0f); 
    }
    
    // Immediate (non-smoothed) operations for F key focus
    void SetFocusPointImmediate(glm::vec3 focusPoint) {
        m_targetFocusPoint = focusPoint;
        m_currentFocusPoint = focusPoint; // Immediate change, no smoothing
        m_viewMatrixDirty = true;
    }
    
    void SetDistanceImmediate(float distance) {
        m_targetDistance = glm::clamp(distance, m_minDistance, m_maxDistance);
        m_currentDistance = m_targetDistance; // Immediate change, no smoothing
        UpdatePosition();
        m_viewMatrixDirty = true;
    }
    
    void SetFocusToSelectionImmediate(glm::vec3 selectionCenter, float selectionRadius = 1.0f) {
        SetFocusPointImmediate(selectionCenter);
        
        // Adjust distance based on selection size
        if (selectionRadius > 0.0f) {
            float recommendedDistance = selectionRadius * 3.0f; // Good viewing distance
            recommendedDistance = glm::clamp(recommendedDistance, m_minDistance, m_maxDistance);
            SetDistanceImmediate(recommendedDistance);
        }
        
        std::cout << "OrbitCamera: Focus set immediately to selection at (" 
                  << selectionCenter.x << ", " << selectionCenter.y << ", " << selectionCenter.z 
                  << ") with radius " << selectionRadius << std::endl;
    }
    
    void FrameAllImmediate(glm::vec3 sceneCenter, float sceneRadius) {
        SetFocusPointImmediate(sceneCenter);
        
        // Calculate distance needed to frame the scene
        float distance = sceneRadius / glm::tan(glm::radians(m_fov * 0.5f)) * 1.5f; // 1.5x padding
        SetDistanceImmediate(distance);
    }
    
    void PanImmediate(float deltaX, float deltaY, float deltaTime) {
        // Get camera's right and up vectors for screen-space panning (like Pan method)
        glm::mat4 viewMatrix = GetViewMatrix();
        glm::vec3 right = glm::vec3(viewMatrix[0][0], viewMatrix[1][0], viewMatrix[2][0]);
        glm::vec3 up = glm::vec3(viewMatrix[0][1], viewMatrix[1][1], viewMatrix[2][1]);
        
        // Scale pan speed by distance to focus point for consistent behavior
        float panScale = m_currentDistance * m_panSensitivity;
        
        // Calculate pan offset
        glm::vec3 panOffset = right * deltaX * panScale + up * deltaY * panScale;
        
        // Set both target AND current immediately (no smoothing)
        m_targetFocusPoint += panOffset;
        m_currentFocusPoint += panOffset;
        m_viewMatrixDirty = true;
    }

private:
    // Current state (interpolated)
    glm::vec3 m_currentPosition;
    glm::vec3 m_currentFocusPoint;
    float m_currentDistance;
    float m_currentAzimuth;      // Horizontal angle around focus point
    float m_currentElevation;    // Vertical angle (pitch)
    
    // Target state (immediate input response)
    glm::vec3 m_targetFocusPoint;
    float m_targetDistance;
    float m_targetAzimuth;
    float m_targetElevation;
    
    // Camera parameters
    float m_fov;                 // Field of view in degrees
    float m_smoothingFactor;     // 0.0 = no smoothing, 1.0 = maximum smoothing
    
    // Sensitivity settings
    float m_orbitSensitivity;
    float m_panSensitivity;
    float m_zoomSensitivity;
    
    // Constraints
    float m_minDistance;
    float m_maxDistance;
    float m_minElevation;        // In degrees
    float m_maxElevation;        // In degrees
    
    // Cached matrices to avoid recalculation
    mutable glm::mat4 m_viewMatrix;
    mutable bool m_viewMatrixDirty;
    
    // Internal methods
    void UpdatePosition() {
        m_currentPosition = SphericalToCartesian(m_currentDistance, m_currentAzimuth, m_currentElevation) + m_currentFocusPoint;
        m_viewMatrixDirty = true;
    }
    
    void ClampConstraints() {
        m_targetDistance = glm::clamp(m_targetDistance, m_minDistance, m_maxDistance);
        m_targetElevation = glm::clamp(m_targetElevation, glm::radians(m_minElevation), glm::radians(m_maxElevation));
        
        // Normalize azimuth to 0-2π range
        while (m_targetAzimuth > 2.0f * M_PI) m_targetAzimuth -= 2.0f * M_PI;
        while (m_targetAzimuth < 0.0f) m_targetAzimuth += 2.0f * M_PI;
    }
    
    glm::vec3 SphericalToCartesian(float distance, float azimuth, float elevation) const {
        // Standard spherical coordinate conversion (input in radians)
        float x = distance * glm::cos(elevation) * glm::cos(azimuth);
        float y = distance * glm::sin(elevation);
        float z = distance * glm::cos(elevation) * glm::sin(azimuth);
        return glm::vec3(x, y, z);
    }
    
    void CartesianToSpherical(glm::vec3 position, glm::vec3 center, float& distance, float& azimuth, float& elevation) const {
        glm::vec3 offset = position - center;
        distance = glm::length(offset);
        
        if (distance < 0.001f) {
            // Very close to center, use default values
            azimuth = 0.0f;
            elevation = 0.0f;
            return;
        }
        
        // Normalize offset for angle calculations
        glm::vec3 normalized = offset / distance;
        
        // Calculate azimuth (horizontal angle) - using atan for proper quadrant
        azimuth = glm::atan(normalized.z, normalized.x);
        
        // Calculate elevation (vertical angle) - use asin but clamp input to avoid NaN
        float sinElevation = glm::clamp(normalized.y, -1.0f, 1.0f);
        elevation = glm::asin(sinElevation);
    }
    
    float LerpAngle(float from, float to, float t) const {
        // Handle angle wraparound for smooth interpolation (using radians)
        float difference = to - from;
        
        // Wrap difference to [-π, π] range
        if (difference > M_PI) difference -= 2.0f * M_PI;
        if (difference < -M_PI) difference += 2.0f * M_PI;
        
        return from + difference * t;
    }
};


// Procedural Geometry Generation
struct ProceduralVertex {
	glm::vec3 position;
	glm::vec3 normal;
	glm::vec3 color;
};

struct ProceduralShape {
	std::vector<ProceduralVertex> vertices;
	std::vector<uint32_t> indices;
	std::string name;
	int type; // 0=cube, 1=sphere, 2=cylinder, 3=plane, 4=cone, 5=torus
	
	// Shape parameters
	struct {
		float width = 2.0f, height = 2.0f, depth = 2.0f;
		int subdivisions = 1;
		float radius = 1.0f;
		int segments = 16;
		float majorRadius = 1.0f, minorRadius = 0.3f;
	} params;
};

class ProceduralGeometry {
public:
	static ProceduralShape generateCube(float width = 4.0f, float height = 4.0f, float depth = 4.0f) {
		ProceduralShape shape;
		shape.name = "Cube";
		shape.type = 0;
		shape.params.width = width;
		shape.params.height = height;
		shape.params.depth = depth;
		
		float w = width * 0.5f;
		float h = height * 0.5f;
		float d = depth * 0.5f;
		
		// Define 24 vertices (4 per face, 6 faces) with colors
		shape.vertices = {
			// Front face (red)
			{{-w, -h,  d}, {0, 0, 1}, {1, 0, 0}}, {{ w, -h,  d}, {0, 0, 1}, {1, 0, 0}},
			{{ w,  h,  d}, {0, 0, 1}, {1, 0, 0}}, {{-w,  h,  d}, {0, 0, 1}, {1, 0, 0}},
			// Back face (green)
			{{ w, -h, -d}, {0, 0, -1}, {0, 1, 0}}, {{-w, -h, -d}, {0, 0, -1}, {0, 1, 0}},
			{{-w,  h, -d}, {0, 0, -1}, {0, 1, 0}}, {{ w,  h, -d}, {0, 0, -1}, {0, 1, 0}},
			// Left face (blue)
			{{-w, -h, -d}, {-1, 0, 0}, {0, 0, 1}}, {{-w, -h,  d}, {-1, 0, 0}, {0, 0, 1}},
			{{-w,  h,  d}, {-1, 0, 0}, {0, 0, 1}}, {{-w,  h, -d}, {-1, 0, 0}, {0, 0, 1}},
			// Right face (yellow)
			{{ w, -h,  d}, {1, 0, 0}, {1, 1, 0}}, {{ w, -h, -d}, {1, 0, 0}, {1, 1, 0}},
			{{ w,  h, -d}, {1, 0, 0}, {1, 1, 0}}, {{ w,  h,  d}, {1, 0, 0}, {1, 1, 0}},
			// Top face (magenta)
			{{-w,  h,  d}, {0, 1, 0}, {1, 0, 1}}, {{ w,  h,  d}, {0, 1, 0}, {1, 0, 1}},
			{{ w,  h, -d}, {0, 1, 0}, {1, 0, 1}}, {{-w,  h, -d}, {0, 1, 0}, {1, 0, 1}},
			// Bottom face (cyan)
			{{-w, -h, -d}, {0, -1, 0}, {0, 1, 1}}, {{ w, -h, -d}, {0, -1, 0}, {0, 1, 1}},
			{{ w, -h,  d}, {0, -1, 0}, {0, 1, 1}}, {{-w, -h,  d}, {0, -1, 0}, {0, 1, 1}}
		};
		
		// Define indices for 12 triangles (2 per face)
		shape.indices = {
			0,1,2, 0,2,3,     // Front
			4,5,6, 4,6,7,     // Back  
			8,9,10, 8,10,11,  // Left
			12,13,14, 12,14,15, // Right
			16,17,18, 16,18,19, // Top
			20,21,22, 20,22,23  // Bottom
		};
		
		return shape;
	}
	
	static ProceduralShape generateSphere(float radius = 1.0f, int segments = 16) {
		ProceduralShape shape;
		shape.name = "Sphere";
		shape.type = 1;
		shape.params.radius = radius;
		shape.params.segments = segments;
		
		// Generate sphere vertices using spherical coordinates
		for (int lat = 0; lat <= segments; ++lat) {
			float theta = lat * M_PI / segments;
			float sinTheta = sin(theta);
			float cosTheta = cos(theta);
			
			for (int lon = 0; lon <= segments; ++lon) {
				float phi = lon * 2 * M_PI / segments;
				float sinPhi = sin(phi);
				float cosPhi = cos(phi);
				
				glm::vec3 pos(radius * sinTheta * cosPhi, radius * cosTheta, radius * sinTheta * sinPhi);
				glm::vec3 normal = glm::normalize(pos);
				glm::vec3 color(0.8f, 0.8f, 0.8f); // Light gray color for sphere
				
				shape.vertices.push_back({pos, normal, color});
			}
		}
		
		// Generate indices
		for (int lat = 0; lat < segments; ++lat) {
			for (int lon = 0; lon < segments; ++lon) {
				int first = lat * (segments + 1) + lon;
				int second = first + segments + 1;
				
				shape.indices.push_back(first);
				shape.indices.push_back(second);
				shape.indices.push_back(first + 1);
				
				shape.indices.push_back(second);
				shape.indices.push_back(second + 1);
				shape.indices.push_back(first + 1);
			}
		}
		
		return shape;
	}
	
	static ProceduralShape generatePlane(float width = 2.0f, float height = 2.0f, int subdivisions = 1) {
		ProceduralShape shape;
		shape.name = "Plane";
		shape.type = 3;
		shape.params.width = width;
		shape.params.height = height;
		shape.params.subdivisions = subdivisions;
		
		float w = width * 0.5f;
		float h = height * 0.5f;
		
		// Simple quad for now
		shape.vertices = {
			{{-w, 0, -h}, {0, 1, 0}, {0.5f, 0.5f, 0.5f}}, // Gray plane
			{{ w, 0, -h}, {0, 1, 0}, {0.5f, 0.5f, 0.5f}},
			{{ w, 0,  h}, {0, 1, 0}, {0.5f, 0.5f, 0.5f}},
			{{-w, 0,  h}, {0, 1, 0}, {0.5f, 0.5f, 0.5f}}
		};
		
		shape.indices = {0, 1, 2, 0, 2, 3};
		
		return shape;
	}
	
	static ProceduralShape generateGrid(float size = 10.0f, int divisions = 10) {
		ProceduralShape shape;
		shape.name = "Grid";
		shape.type = 6; // Grid type
		shape.params.width = size;
		shape.params.subdivisions = divisions;
		
		float step = size / divisions;
		float halfSize = size * 0.5f;
		
		// Create grid lines (white grid)
		glm::vec3 gridColor(1.0f, 1.0f, 1.0f);
		for (int i = 0; i <= divisions; ++i) {
			float pos = -halfSize + i * step;
			
			// Horizontal lines
			shape.vertices.push_back({{-halfSize, 0, pos}, {0, 1, 0}, gridColor});
			shape.vertices.push_back({{ halfSize, 0, pos}, {0, 1, 0}, gridColor});
			
			// Vertical lines  
			shape.vertices.push_back({{pos, 0, -halfSize}, {0, 1, 0}, gridColor});
			shape.vertices.push_back({{pos, 0,  halfSize}, {0, 1, 0}, gridColor});
		}
		
		// Generate indices for lines
		for (int i = 0; i < (divisions + 1) * 4; i += 2) {
			shape.indices.push_back(i);
			shape.indices.push_back(i + 1);
		}
		
		return shape;
	}
	
	static ProceduralShape generateCone(float radius = 1.0f, float height = 2.0f, int segments = 16) {
		ProceduralShape shape;
		shape.name = "Cone";
		shape.type = 4; // Cone type
		shape.params.radius = radius;
		shape.params.height = height;
		shape.params.segments = segments;
		
		// Add tip vertex (red cone tip)
		shape.vertices.push_back({{0, height * 0.5f, 0}, {0, 1, 0}, {1.0f, 0.0f, 0.0f}});
		
		// Add center vertex for base (dark red)
		shape.vertices.push_back({{0, -height * 0.5f, 0}, {0, -1, 0}, {0.5f, 0.0f, 0.0f}});
		
		// Generate base vertices
		for (int i = 0; i <= segments; ++i) {
			float angle = (float)i / segments * 2.0f * M_PI;
			float x = cos(angle) * radius;
			float z = sin(angle) * radius;
			glm::vec3 color(0.8f, 0.2f, 0.2f); // Light red
			
			// Base vertex
			shape.vertices.push_back({{x, -height * 0.5f, z}, {0, -1, 0}, color});
			
			// Side vertex (for side triangles)
			glm::vec3 sideNormal = glm::normalize(glm::vec3(x, radius / height, z));
			shape.vertices.push_back({{x, -height * 0.5f, z}, sideNormal, color});
		}
		
		// Generate indices
		// Side triangles (tip to base edge)
		for (int i = 0; i < segments; ++i) {
			int baseStart = 2 + segments + 1;
			shape.indices.push_back(0); // tip
			shape.indices.push_back(baseStart + (i + 1) * 2);
			shape.indices.push_back(baseStart + i * 2);
		}
		
		// Base triangles
		for (int i = 0; i < segments; ++i) {
			shape.indices.push_back(1); // center
			shape.indices.push_back(2 + i);
			shape.indices.push_back(2 + ((i + 1) % (segments + 1)));
		}
		
		return shape;
	}
	
	static ProceduralShape generateCylinder(float radius = 1.0f, float height = 2.0f, int segments = 16) {
		ProceduralShape shape;
		shape.name = "Cylinder";
		shape.type = 5; // Cylinder type
		shape.params.radius = radius;
		shape.params.height = height;
		shape.params.segments = segments;
		
		float halfHeight = height * 0.5f;
		
		// Add center vertices for caps (blue cylinder)
		shape.vertices.push_back({{0, halfHeight, 0}, {0, 1, 0}, {0.0f, 0.0f, 1.0f}});   // top center
		shape.vertices.push_back({{0, -halfHeight, 0}, {0, -1, 0}, {0.0f, 0.0f, 1.0f}}); // bottom center
		
		// Generate side vertices (double for proper normals)
		for (int i = 0; i <= segments; ++i) {
			float angle = (float)i / segments * 2.0f * M_PI;
			float x = cos(angle) * radius;
			float z = sin(angle) * radius;
			glm::vec3 normal = glm::normalize(glm::vec3(x, 0, z));
			glm::vec3 color(0.2f, 0.4f, 1.0f); // Light blue
			
			// Top vertices
			shape.vertices.push_back({{x, halfHeight, z}, {0, 1, 0}, color}); // top cap
			shape.vertices.push_back({{x, halfHeight, z}, normal, color});  // top side
			
			// Bottom vertices  
			shape.vertices.push_back({{x, -halfHeight, z}, {0, -1, 0}, color}); // bottom cap
			shape.vertices.push_back({{x, -halfHeight, z}, normal, color}); // bottom side
		}
		
		// Generate indices
		for (int i = 0; i < segments; ++i) {
			int topCapStart = 2;
			int bottomCapStart = 4;
			
			// Top cap triangles
			shape.indices.push_back(0); // top center
			shape.indices.push_back(topCapStart + ((i + 1) % (segments + 1)) * 4);
			shape.indices.push_back(topCapStart + i * 4);
			
			// Bottom cap triangles
			shape.indices.push_back(1); // bottom center
			shape.indices.push_back(bottomCapStart + i * 4);
			shape.indices.push_back(bottomCapStart + ((i + 1) % (segments + 1)) * 4);
			
			// Side quads (as two triangles)
			int topSide1 = topCapStart + 1 + i * 4;
			int topSide2 = topCapStart + 1 + ((i + 1) % (segments + 1)) * 4;
			int bottomSide1 = bottomCapStart + 1 + i * 4;
			int bottomSide2 = bottomCapStart + 1 + ((i + 1) % (segments + 1)) * 4;
			
			// First triangle
			shape.indices.push_back(topSide1);
			shape.indices.push_back(bottomSide1);
			shape.indices.push_back(topSide2);
			
			// Second triangle
			shape.indices.push_back(topSide2);
			shape.indices.push_back(bottomSide1);
			shape.indices.push_back(bottomSide2);
		}
		
		return shape;
	}
	
	static ProceduralShape generateTorus(float majorRadius = 1.0f, float minorRadius = 0.3f, int majorSegments = 16, int minorSegments = 8) {
		ProceduralShape shape;
		shape.name = "Torus";
		shape.type = 6; // Torus type
		shape.params.majorRadius = majorRadius;
		shape.params.minorRadius = minorRadius;
		shape.params.segments = majorSegments;
		shape.params.subdivisions = minorSegments;
		
		// Generate vertices
		for (int i = 0; i <= majorSegments; ++i) {
			float majorAngle = (float)i / majorSegments * 2.0f * M_PI;
			float cosMajor = cos(majorAngle);
			float sinMajor = sin(majorAngle);
			
			for (int j = 0; j <= minorSegments; ++j) {
				float minorAngle = (float)j / minorSegments * 2.0f * M_PI;
				float cosMinor = cos(minorAngle);
				float sinMinor = sin(minorAngle);
				
				// Calculate position
				float x = (majorRadius + minorRadius * cosMinor) * cosMajor;
				float y = minorRadius * sinMinor;
				float z = (majorRadius + minorRadius * cosMinor) * sinMajor;
				
				// Calculate normal
				glm::vec3 center(majorRadius * cosMajor, 0, majorRadius * sinMajor);
				glm::vec3 position(x, y, z);
				glm::vec3 normal = glm::normalize(position - center);
				
				// Use orange color for torus
				glm::vec3 color(1.0f, 0.5f, 0.0f);
				
				shape.vertices.push_back({{x, y, z}, normal, color});
			}
		}
		
		// Generate indices
		for (int i = 0; i < majorSegments; ++i) {
			for (int j = 0; j < minorSegments; ++j) {
				int current = i * (minorSegments + 1) + j;
				int next = ((i + 1) % (majorSegments + 1)) * (minorSegments + 1) + j;
				
				// First triangle
				shape.indices.push_back(current);
				shape.indices.push_back(next);
				shape.indices.push_back(current + 1);
				
				// Second triangle
				shape.indices.push_back(next);
				shape.indices.push_back(next + 1);
				shape.indices.push_back(current + 1);
			}
		}
		
		return shape;
	}
};

// Simple Scene Object for basic hierarchy
struct SceneObject {
	std::string name;
	std::string type;
	std::string subtype;  // For procedural shapes (Cube, Sphere, etc.)
	bool visible = true;
	
	// Simple geometry data (for procedural shapes)
	std::vector<ProceduralVertex> vertices;
	std::vector<uint32_t> indices;
	glm::vec3 position = {0.0f, 0.0f, 0.0f};   // Place objects at world origin
	glm::vec3 rotation = {0.0f, 0.0f, 0.0f};
	glm::vec3 scale = {1.0f, 1.0f, 1.0f};      // Default unit scale
	
	// Procedural shape parameters (for real-time editing)
	struct ProceduralParams {
		// Cube parameters
		float cubeWidth = 2.0f;
		float cubeHeight = 2.0f;
		float cubeDepth = 2.0f;
		int cubeSubdivisions = 1;
		
		// Sphere parameters
		float sphereRadius = 1.0f;
		int sphereSegments = 16;
		
		// Cylinder parameters
		float cylinderRadius = 1.0f;
		float cylinderHeight = 2.0f;
		int cylinderSegments = 16;
		
		// Cone parameters
		float coneRadius = 1.0f;
		float coneHeight = 2.0f;
		int coneSegments = 16;
		
		// Plane parameters
		float planeWidth = 2.0f;
		float planeHeight = 2.0f;
		int planeSubdivisions = 1;
		
		// Torus parameters
		float torusMajorRadius = 1.0f;
		float torusMinorRadius = 0.3f;
		int torusMajorSegments = 16;
		int torusMinorSegments = 8;
	} proceduralParams;
	
	// Persistent Vulkan buffers (created once, used multiple times)
	vks::Buffer vertexBuffer;
	vks::Buffer indexBuffer;
	bool buffersCreated = false;
	
	SceneObject(const std::string& objName, const std::string& objType = "Object") 
		: name(objName), type(objType) {}
	
	// Cleanup buffers when object is destroyed
	void destroyBuffers(vks::VulkanDevice* device) {
		if (buffersCreated) {
			vertexBuffer.destroy();
			indexBuffer.destroy();
			buffersCreated = false;
		}
	}
	
	// Calculate bounding box center for camera focus
	glm::vec3 getBoundingBoxCenter() const {
		if (vertices.empty()) return position;
		
		glm::vec3 minPos = vertices[0].position;
		glm::vec3 maxPos = vertices[0].position;
		
		for (const auto& vertex : vertices) {
			minPos = glm::min(minPos, vertex.position);
			maxPos = glm::max(maxPos, vertex.position);
		}
		
		// Apply object transformation
		glm::vec3 center = (minPos + maxPos) * 0.5f;
		center = position + center * scale; // Simple transform (rotation not included for simplicity)
		
		return center;
	}
	
	// Calculate bounding radius for camera focus
	float getBoundingRadius() const {
		if (vertices.empty()) return 1.0f;
		
		glm::vec3 center = getBoundingBoxCenter();
		float maxRadius = 0.0f;
		
		for (const auto& vertex : vertices) {
			glm::vec3 transformedPos = position + vertex.position * scale;
			float distance = glm::length(transformedPos - center);
			maxRadius = std::max(maxRadius, distance);
		}
		
		return std::max(maxRadius, 0.5f); // Minimum radius of 0.5
	}
	
	// Regenerate geometry based on current procedural parameters
	void regenerateGeometry() {
		if (type != "Procedural") return;
		
		ProceduralShape shape;
		
		if (subtype == "Cube") {
			shape = ProceduralGeometry::generateCube(proceduralParams.cubeWidth, 
													proceduralParams.cubeHeight, 
													proceduralParams.cubeDepth);
		} else if (subtype == "Sphere") {
			shape = ProceduralGeometry::generateSphere(proceduralParams.sphereRadius, 
													  proceduralParams.sphereSegments);
		} else if (subtype == "Cylinder") {
			shape = ProceduralGeometry::generateCylinder(proceduralParams.cylinderRadius, 
														proceduralParams.cylinderHeight, 
														proceduralParams.cylinderSegments);
		} else if (subtype == "Cone") {
			shape = ProceduralGeometry::generateCone(proceduralParams.coneRadius, 
													proceduralParams.coneHeight, 
													proceduralParams.coneSegments);
		} else if (subtype == "Plane") {
			shape = ProceduralGeometry::generatePlane(proceduralParams.planeWidth, 
													 proceduralParams.planeHeight, 
													 proceduralParams.planeSubdivisions);
		} else if (subtype == "Torus") {
			shape = ProceduralGeometry::generateTorus(proceduralParams.torusMajorRadius, 
													 proceduralParams.torusMinorRadius, 
													 proceduralParams.torusMajorSegments, 
													 proceduralParams.torusMinorSegments);
		}
		
		// Update geometry data
		vertices = shape.vertices;
		indices = shape.indices;
		
		// Destroy existing buffers if they exist (to handle size changes)
		if (buffersCreated) {
			vertexBuffer.destroy();
			indexBuffer.destroy();
		}
		
		// Mark buffers as needing recreation
		buffersCreated = false;
	}
};

// Simple scene management
struct SimpleSceneManager {
	std::vector<SceneObject> objects;
	int selectedIndex = -1;
	vks::VulkanDevice* device = nullptr;
	
	void addObject(const std::string& name, const std::string& type = "Procedural") {
		objects.emplace_back(name, type);
		selectedIndex = static_cast<int>(objects.size() - 1);
	}
	
	void addProceduralShape(const std::string& shapeName, const std::string& shapeType) {
		std::string fullName = shapeName + " " + std::to_string(getObjectCount() + 1);
		objects.emplace_back(fullName, "Procedural");
		
		// Generate actual geometry based on shape type
		SceneObject& newObj = objects.back();
		newObj.subtype = shapeType;  // Set the shape subtype (Cube, Sphere, etc.)
		
		// Place all objects at world origin (0,0,0) 
		// Users can move them via transform controls in Inspector
		newObj.position.x = 0.0f;
		newObj.position.y = 0.0f;
		newObj.position.z = 0.0f;
		
		// Initialize procedural parameters based on shape type (use regenerateGeometry to create initial geometry)
		newObj.regenerateGeometry();
		
		// Create Vulkan buffers for the geometry (delayed until first render)
		// createBuffersForObject(newObj);
		
		selectedIndex = static_cast<int>(objects.size() - 1);
	}
	
	void createBuffersForObject(SceneObject& obj) {
		// Enhanced validation
		if (!device) {
			std::cout << "Error: Device not available for buffer creation" << std::endl;
			return;
		}
		
		if (obj.vertices.empty() || obj.indices.empty()) {
			std::cout << "Error: Cannot create buffers for " << obj.name << " - geometry data is empty" << std::endl;
			return;
		}
		
		if (obj.buffersCreated) {
			std::cout << "Info: Buffers already created for " << obj.name << std::endl;
			return;
		}
		
		// Validate geometry data size
		if (obj.vertices.size() > 1000000 || obj.indices.size() > 3000000) {
			std::cout << "Warning: Large geometry for " << obj.name << " - vertices: " << obj.vertices.size() << ", indices: " << obj.indices.size() << std::endl;
		}
		
		try {
			std::cout << "Creating buffers for " << obj.name << " with " << obj.vertices.size() << " vertices and " << obj.indices.size() << " indices" << std::endl;
			
			// Create vertex buffer
			VkDeviceSize vertexBufferSize = obj.vertices.size() * sizeof(ProceduralVertex);
			if (vertexBufferSize == 0) {
				std::cout << "Error: Zero vertex buffer size for " << obj.name << std::endl;
				return;
			}
			
			VkResult result = device->createBuffer(
				VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
				VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
				&obj.vertexBuffer,
				vertexBufferSize,
				(void*)obj.vertices.data()
			);
			
			if (result != VK_SUCCESS) {
				std::cout << "Failed to create vertex buffer for " << obj.name << " - VkResult: " << result << std::endl;
				return;
			}
			
			// Validate vertex buffer creation
			if (obj.vertexBuffer.buffer == VK_NULL_HANDLE) {
				std::cout << "Error: Vertex buffer handle is null for " << obj.name << std::endl;
				return;
			}
			
			// Create index buffer
			VkDeviceSize indexBufferSize = obj.indices.size() * sizeof(uint32_t);
			if (indexBufferSize == 0) {
				std::cout << "Error: Zero index buffer size for " << obj.name << std::endl;
				obj.vertexBuffer.destroy();
				return;
			}
			
			result = device->createBuffer(
				VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
				VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
				&obj.indexBuffer,
				indexBufferSize,
				(void*)obj.indices.data()
			);
			
			if (result != VK_SUCCESS) {
				std::cout << "Failed to create index buffer for " << obj.name << " - VkResult: " << result << std::endl;
				obj.vertexBuffer.destroy();
				return;
			}
			
			// Validate index buffer creation
			if (obj.indexBuffer.buffer == VK_NULL_HANDLE) {
				std::cout << "Error: Index buffer handle is null for " << obj.name << std::endl;
				obj.vertexBuffer.destroy();
				return;
			}
			
			obj.buffersCreated = true;
			std::cout << "Successfully created buffers for " << obj.name << " (vertex: " << vertexBufferSize << " bytes, index: " << indexBufferSize << " bytes)" << std::endl;
		}
		catch (const std::exception& e) {
			std::cout << "Exception creating buffers for " << obj.name << ": " << e.what() << std::endl;
			obj.buffersCreated = false;
			// Clean up any partially created buffers
			if (obj.vertexBuffer.buffer != VK_NULL_HANDLE) {
				obj.vertexBuffer.destroy();
			}
			if (obj.indexBuffer.buffer != VK_NULL_HANDLE) {
				obj.indexBuffer.destroy();
			}
		}
	}
	
	void removeObject(int index) {
		if (index >= 0 && index < objects.size()) {
			// Clean up buffers before removing object
			objects[index].destroyBuffers(device);
			objects.erase(objects.begin() + index);
			if (selectedIndex >= objects.size()) {
				selectedIndex = static_cast<int>(objects.size() - 1);
			}
		}
	}
	
	void clearScene() {
		// Clean up all buffers before clearing
		for (auto& obj : objects) {
			obj.destroyBuffers(device);
		}
		objects.clear();
		selectedIndex = -1;
	}
	
	int getObjectCount() const {
		return static_cast<int>(objects.size());
	}
	
	// Selection management
	void setSelectedIndex(int index) {
		if (index >= -1 && index < static_cast<int>(objects.size())) {
			selectedIndex = index;
		}
	}
	
	int getSelectedIndex() const {
		return selectedIndex;
	}
	
	SceneObject* getSelectedObject() {
		if (selectedIndex >= 0 && selectedIndex < static_cast<int>(objects.size())) {
			return &objects[selectedIndex];
		}
		return nullptr;
	}
	
	bool hasSelection() const {
		return selectedIndex >= 0 && selectedIndex < static_cast<int>(objects.size());
	}
	
	void clearSelection() {
		selectedIndex = -1;
	}
} sceneManager;

// Options and values to display/toggle from the UI
struct UISettings {
	bool displayModels = false;
	bool displayBackground = false;
	bool animateLight = false;
	float lightSpeed = 0.25f;
	std::array<float, 50> frameTimes{};
	float frameTimeMin = 9999.0f, frameTimeMax = 0.0f;
	float lightTimer = 0.0f;
	bool showGrid = true;
	float gridSize = 10.0f;
	int gridDivisions = 10;
	
	// Panel visibility settings (for Windows menu)
	bool showViewportPanel = true;
	bool showInspectorPanel = true;
	bool showSceneHierarchyPanel = true;
	bool showAssetBrowserPanel = true;
	bool showConsolePanel = false;  // Hidden by default
} uiSettings;

// ----------------------------------------------------------------------------
// ImGUI class
// ----------------------------------------------------------------------------
class ImGUI {
private:
	// Vulkan resources for rendering the UI
	VkSampler sampler;
	vks::Buffer vertexBuffer;
	vks::Buffer indexBuffer;
	int32_t vertexCount = 0;
	int32_t indexCount = 0;
	VkDeviceMemory fontMemory = VK_NULL_HANDLE;
	VkImage fontImage = VK_NULL_HANDLE;
	VkImageView fontView = VK_NULL_HANDLE;
	VkPipelineCache pipelineCache;
	VkPipelineLayout pipelineLayout;
	VkPipeline pipeline;
	VkDescriptorPool descriptorPool;
	VkDescriptorSetLayout descriptorSetLayout;
	VkDescriptorSet descriptorSet;
	vks::VulkanDevice *device;
	VkPhysicalDeviceDriverProperties driverProperties = {};
	VulkanExampleBase *example;
	ImGuiStyle vulkanStyle;
	int selectedStyle = 0;
public:
	// UI params are set via push constants
	struct PushConstBlock {
		glm::vec2 scale;
		glm::vec2 translate;
	} pushConstBlock;

	ImGUI(VulkanExampleBase *example) : example(example)
	{
		device = example->vulkanDevice;
		ImGui::CreateContext();
		
		//SRS - Set ImGui font and style scale factors to handle retina and other HiDPI displays
		ImGuiIO& io = ImGui::GetIO();
		io.FontGlobalScale = example->ui.scale;
		ImGuiStyle& style = ImGui::GetStyle();
		style.ScaleAllSizes(example->ui.scale);
	};

	~ImGUI()
	{
		ImGui::DestroyContext();
		// Release all Vulkan resources required for rendering imGui
		vertexBuffer.destroy();
		indexBuffer.destroy();
		vkDestroyImage(device->logicalDevice, fontImage, nullptr);
		vkDestroyImageView(device->logicalDevice, fontView, nullptr);
		vkFreeMemory(device->logicalDevice, fontMemory, nullptr);
		vkDestroySampler(device->logicalDevice, sampler, nullptr);
		vkDestroyPipelineCache(device->logicalDevice, pipelineCache, nullptr);
		vkDestroyPipeline(device->logicalDevice, pipeline, nullptr);
		vkDestroyPipelineLayout(device->logicalDevice, pipelineLayout, nullptr);
		vkDestroyDescriptorPool(device->logicalDevice, descriptorPool, nullptr);
		vkDestroyDescriptorSetLayout(device->logicalDevice, descriptorSetLayout, nullptr);
	}

	// Initialize styles, keys, etc.
	void init(float width, float height)
	{
		// Color scheme
		vulkanStyle = ImGui::GetStyle();
		vulkanStyle.Colors[ImGuiCol_TitleBg] = ImVec4(1.0f, 0.0f, 0.0f, 0.6f);
		vulkanStyle.Colors[ImGuiCol_TitleBgActive] = ImVec4(1.0f, 0.0f, 0.0f, 0.8f);
		vulkanStyle.Colors[ImGuiCol_MenuBarBg] = ImVec4(1.0f, 0.0f, 0.0f, 0.4f);
		vulkanStyle.Colors[ImGuiCol_Header] = ImVec4(1.0f, 0.0f, 0.0f, 0.4f);
		vulkanStyle.Colors[ImGuiCol_CheckMark] = ImVec4(0.0f, 1.0f, 0.0f, 1.0f);

		setStyle(0);
		
		// Dimensions
		ImGuiIO& io = ImGui::GetIO();
		io.DisplaySize = ImVec2(width, height);
		io.DisplayFramebufferScale = ImVec2(1.0f, 1.0f);
#if defined(_WIN32)
		// If we directly work with os specific key codes, we need to map special key types like tab
		io.KeyMap[ImGuiKey_Tab] = VK_TAB;
		io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
		io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
		io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
		io.KeyMap[ImGuiKey_DownArrow] = VK_DOWN;
		io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
		io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
		io.KeyMap[ImGuiKey_Space] = VK_SPACE;
		io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
#endif
	}

	void setStyle(uint32_t index)
	{
		switch (index)
		{
		case 0:
		{
			ImGuiStyle& style = ImGui::GetStyle();
			style = vulkanStyle;
			break;
		}
		case 1:
			ImGui::StyleColorsClassic();
			break;
		case 2:
			ImGui::StyleColorsDark();
			break;
		case 3:
			ImGui::StyleColorsLight();
			break;
		case 4: // Blue theme
		{
			ImGuiStyle& style = ImGui::GetStyle();
			style = ImGui::GetStyle();
			style.Colors[ImGuiCol_TitleBg] = ImVec4(0.0f, 0.3f, 0.8f, 0.6f);
			style.Colors[ImGuiCol_TitleBgActive] = ImVec4(0.0f, 0.4f, 1.0f, 0.8f);
			style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.0f, 0.2f, 0.6f, 0.4f);
			style.Colors[ImGuiCol_Header] = ImVec4(0.0f, 0.3f, 0.7f, 0.4f);
			style.Colors[ImGuiCol_CheckMark] = ImVec4(0.0f, 1.0f, 1.0f, 1.0f);
			style.Colors[ImGuiCol_WindowBg] = ImVec4(0.05f, 0.05f, 0.15f, 0.9f);
			break;
		}
		case 5: // Green theme
		{
			ImGuiStyle& style = ImGui::GetStyle();
			style = ImGui::GetStyle();
			style.Colors[ImGuiCol_TitleBg] = ImVec4(0.0f, 0.6f, 0.2f, 0.6f);
			style.Colors[ImGuiCol_TitleBgActive] = ImVec4(0.0f, 0.8f, 0.3f, 0.8f);
			style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.0f, 0.4f, 0.1f, 0.4f);
			style.Colors[ImGuiCol_Header] = ImVec4(0.0f, 0.5f, 0.2f, 0.4f);
			style.Colors[ImGuiCol_CheckMark] = ImVec4(0.0f, 1.0f, 0.0f, 1.0f);
			style.Colors[ImGuiCol_WindowBg] = ImVec4(0.05f, 0.15f, 0.05f, 0.9f);
			break;
		}
		case 6: // Purple theme
		{
			ImGuiStyle& style = ImGui::GetStyle();
			style = ImGui::GetStyle();
			style.Colors[ImGuiCol_TitleBg] = ImVec4(0.5f, 0.0f, 0.8f, 0.6f);
			style.Colors[ImGuiCol_TitleBgActive] = ImVec4(0.7f, 0.0f, 1.0f, 0.8f);
			style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.3f, 0.0f, 0.6f, 0.4f);
			style.Colors[ImGuiCol_Header] = ImVec4(0.4f, 0.0f, 0.7f, 0.4f);
			style.Colors[ImGuiCol_CheckMark] = ImVec4(1.0f, 0.0f, 1.0f, 1.0f);
			style.Colors[ImGuiCol_WindowBg] = ImVec4(0.1f, 0.05f, 0.15f, 0.9f);
			break;
		}
		}
	}

	// Initialize all Vulkan resources used by the ui
	void initResources(VkRenderPass renderPass, VkQueue copyQueue, const std::string& shadersPath, VkFormat colorFormat = VK_FORMAT_UNDEFINED, VkFormat depthFormat = VK_FORMAT_UNDEFINED)
	{
		ImGuiIO& io = ImGui::GetIO();

		// Create font texture
		unsigned char* fontData;
		int texWidth, texHeight;
		io.Fonts->GetTexDataAsRGBA32(&fontData, &texWidth, &texHeight);
		VkDeviceSize uploadSize = texWidth*texHeight * 4 * sizeof(char);

		//SRS - Get Vulkan device driver information if available, use later for display
		if (device->extensionSupported(VK_KHR_DRIVER_PROPERTIES_EXTENSION_NAME))
		{
			VkPhysicalDeviceProperties2 deviceProperties2 = {};
			deviceProperties2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
			deviceProperties2.pNext = &driverProperties;
			driverProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DRIVER_PROPERTIES;
			vkGetPhysicalDeviceProperties2(device->physicalDevice, &deviceProperties2);
		}

		// Create target image for copy
		VkImageCreateInfo imageInfo = vks::initializers::imageCreateInfo();
		imageInfo.imageType = VK_IMAGE_TYPE_2D;
		imageInfo.format = VK_FORMAT_R8G8B8A8_UNORM;
		imageInfo.extent.width = texWidth;
		imageInfo.extent.height = texHeight;
		imageInfo.extent.depth = 1;
		imageInfo.mipLevels = 1;
		imageInfo.arrayLayers = 1;
		imageInfo.samples = VK_SAMPLE_COUNT_1_BIT;
		imageInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
		imageInfo.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
		imageInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
		imageInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
		VK_CHECK_RESULT(vkCreateImage(device->logicalDevice, &imageInfo, nullptr, &fontImage));
		VkMemoryRequirements memReqs;
		vkGetImageMemoryRequirements(device->logicalDevice, fontImage, &memReqs);
		VkMemoryAllocateInfo memAllocInfo = vks::initializers::memoryAllocateInfo();
		memAllocInfo.allocationSize = memReqs.size;
		memAllocInfo.memoryTypeIndex = device->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
		VK_CHECK_RESULT(vkAllocateMemory(device->logicalDevice, &memAllocInfo, nullptr, &fontMemory));
		VK_CHECK_RESULT(vkBindImageMemory(device->logicalDevice, fontImage, fontMemory, 0));

		// Image view
		VkImageViewCreateInfo viewInfo = vks::initializers::imageViewCreateInfo();
		viewInfo.image = fontImage;
		viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
		viewInfo.format = VK_FORMAT_R8G8B8A8_UNORM;
		viewInfo.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
		viewInfo.subresourceRange.levelCount = 1;
		viewInfo.subresourceRange.layerCount = 1;
		VK_CHECK_RESULT(vkCreateImageView(device->logicalDevice, &viewInfo, nullptr, &fontView));

		// Staging buffers for font data upload
		vks::Buffer stagingBuffer;

		VK_CHECK_RESULT(device->createBuffer(
			VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
			&stagingBuffer,
			uploadSize));

		stagingBuffer.map();
		memcpy(stagingBuffer.mapped, fontData, uploadSize);
		stagingBuffer.unmap();

		// Copy buffer data to font image
		VkCommandBuffer copyCmd = device->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);

		// Prepare for transfer
		vks::tools::setImageLayout(
			copyCmd,
			fontImage,
			VK_IMAGE_ASPECT_COLOR_BIT,
			VK_IMAGE_LAYOUT_UNDEFINED,
			VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
			VK_PIPELINE_STAGE_HOST_BIT,
			VK_PIPELINE_STAGE_TRANSFER_BIT);

		// Copy
		VkBufferImageCopy bufferCopyRegion = {};
		bufferCopyRegion.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
		bufferCopyRegion.imageSubresource.layerCount = 1;
		bufferCopyRegion.imageExtent.width = texWidth;
		bufferCopyRegion.imageExtent.height = texHeight;
		bufferCopyRegion.imageExtent.depth = 1;

		vkCmdCopyBufferToImage(
			copyCmd,
			stagingBuffer.buffer,
			fontImage,
			VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
			1,
			&bufferCopyRegion
		);

		// Prepare for shader read
		vks::tools::setImageLayout(
			copyCmd,
			fontImage,
			VK_IMAGE_ASPECT_COLOR_BIT,
			VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
			VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
			VK_PIPELINE_STAGE_TRANSFER_BIT,
			VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT);

		device->flushCommandBuffer(copyCmd, copyQueue, true);

		stagingBuffer.destroy();

		// Font texture Sampler
		VkSamplerCreateInfo samplerInfo = vks::initializers::samplerCreateInfo();
		samplerInfo.magFilter = VK_FILTER_LINEAR;
		samplerInfo.minFilter = VK_FILTER_LINEAR;
		samplerInfo.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
		samplerInfo.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
		samplerInfo.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
		samplerInfo.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
		samplerInfo.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
		VK_CHECK_RESULT(vkCreateSampler(device->logicalDevice, &samplerInfo, nullptr, &sampler));

		// Descriptor pool
		std::vector<VkDescriptorPoolSize> poolSizes = {
			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1)
		};
		VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
		VK_CHECK_RESULT(vkCreateDescriptorPool(device->logicalDevice, &descriptorPoolInfo, nullptr, &descriptorPool));

		// Descriptor set layout
		std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
			vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0),
		};
		VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device->logicalDevice, &descriptorLayout, nullptr, &descriptorSetLayout));

		// Descriptor set
		VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
		VK_CHECK_RESULT(vkAllocateDescriptorSets(device->logicalDevice, &allocInfo, &descriptorSet));
		VkDescriptorImageInfo fontDescriptor = vks::initializers::descriptorImageInfo(
			sampler,
			fontView,
			VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL
		);
		std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
			vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &fontDescriptor)
		};
		vkUpdateDescriptorSets(device->logicalDevice, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);

		// Pipeline cache
		VkPipelineCacheCreateInfo pipelineCacheCreateInfo = {};
		pipelineCacheCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO;
		VK_CHECK_RESULT(vkCreatePipelineCache(device->logicalDevice, &pipelineCacheCreateInfo, nullptr, &pipelineCache));

		// Pipeline layout
		// Push constants for UI rendering parameters
		VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(PushConstBlock), 0);
		VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
		pipelineLayoutCreateInfo.pushConstantRangeCount = 1;
		pipelineLayoutCreateInfo.pPushConstantRanges = &pushConstantRange;
		VK_CHECK_RESULT(vkCreatePipelineLayout(device->logicalDevice, &pipelineLayoutCreateInfo, nullptr, &pipelineLayout));

		// Setup graphics pipeline for UI rendering
		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
			vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);

		VkPipelineRasterizationStateCreateInfo rasterizationState =
			vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_COUNTER_CLOCKWISE);

		// Enable blending
		VkPipelineColorBlendAttachmentState blendAttachmentState{};
		blendAttachmentState.blendEnable = VK_TRUE;
		blendAttachmentState.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
		blendAttachmentState.srcColorBlendFactor = VK_BLEND_FACTOR_SRC_ALPHA;
		blendAttachmentState.dstColorBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
		blendAttachmentState.colorBlendOp = VK_BLEND_OP_ADD;
		blendAttachmentState.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
		blendAttachmentState.dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO;
		blendAttachmentState.alphaBlendOp = VK_BLEND_OP_ADD;

		VkPipelineColorBlendStateCreateInfo colorBlendState =
			vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);

		VkPipelineDepthStencilStateCreateInfo depthStencilState =
			vks::initializers::pipelineDepthStencilStateCreateInfo(VK_FALSE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);

		VkPipelineViewportStateCreateInfo viewportState =
			vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);

		VkPipelineMultisampleStateCreateInfo multisampleState =
			vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);

		std::vector<VkDynamicState> dynamicStateEnables = {
			VK_DYNAMIC_STATE_VIEWPORT,
			VK_DYNAMIC_STATE_SCISSOR
		};
		VkPipelineDynamicStateCreateInfo dynamicState =
			vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);

		std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages{};

		// Create pipeline - use dynamic rendering if no render pass provided
		VkGraphicsPipelineCreateInfo pipelineCreateInfo;
		if (renderPass == VK_NULL_HANDLE) {
			// Dynamic rendering
			pipelineCreateInfo = vks::initializers::pipelineCreateInfo();
			pipelineCreateInfo.layout = pipelineLayout;
		} else {
			// Traditional render pass
			pipelineCreateInfo = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass);
		}

		pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
		pipelineCreateInfo.pRasterizationState = &rasterizationState;
		pipelineCreateInfo.pColorBlendState = &colorBlendState;
		pipelineCreateInfo.pMultisampleState = &multisampleState;
		pipelineCreateInfo.pViewportState = &viewportState;
		pipelineCreateInfo.pDepthStencilState = &depthStencilState;
		pipelineCreateInfo.pDynamicState = &dynamicState;
		pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
		pipelineCreateInfo.pStages = shaderStages.data();

		// Vertex bindings an attributes based on ImGui vertex definition
		std::vector<VkVertexInputBindingDescription> vertexInputBindings = {
			vks::initializers::vertexInputBindingDescription(0, sizeof(ImDrawVert), VK_VERTEX_INPUT_RATE_VERTEX),
		};
		std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
			vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32_SFLOAT, offsetof(ImDrawVert, pos)),	// Location 0: Position
			vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32_SFLOAT, offsetof(ImDrawVert, uv)),	// Location 1: UV
			vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R8G8B8A8_UNORM, offsetof(ImDrawVert, col)),	// Location 0: Color
		};
		VkPipelineVertexInputStateCreateInfo vertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
		vertexInputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertexInputBindings.size());
		vertexInputState.pVertexBindingDescriptions = vertexInputBindings.data();
		vertexInputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertexInputAttributes.size());
		vertexInputState.pVertexAttributeDescriptions = vertexInputAttributes.data();

		pipelineCreateInfo.pVertexInputState = &vertexInputState;

		// Dynamic rendering create info for ImGui pipeline (only if using dynamic rendering)
		VkPipelineRenderingCreateInfoKHR pipelineRenderingCreateInfo{};
		if (renderPass == VK_NULL_HANDLE && colorFormat != VK_FORMAT_UNDEFINED) {
			pipelineRenderingCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR;
			pipelineRenderingCreateInfo.colorAttachmentCount = 1;
			pipelineRenderingCreateInfo.pColorAttachmentFormats = &colorFormat;
			pipelineRenderingCreateInfo.depthAttachmentFormat = depthFormat;
			pipelineRenderingCreateInfo.stencilAttachmentFormat = depthFormat;
			// Chain into the pipeline create info
			pipelineCreateInfo.pNext = &pipelineRenderingCreateInfo;
		}

		shaderStages[0] = example->loadShader(shadersPath + "imgui/ui.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
		shaderStages[1] = example->loadShader(shadersPath + "imgui/ui.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);

		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device->logicalDevice, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipeline));
	}


	// Starts a new imGui frame and sets up windows and ui elements
	void newFrame(VulkanExampleBase *example, bool updateFrameGraph)
	{
		ImGui::NewFrame();

		// Menu Bar
		if (ImGui::BeginMainMenuBar())
		{
			if (ImGui::BeginMenu("File"))
			{
				if (ImGui::MenuItem("New Scene", "Ctrl+N")) {
					// Clear scene
					sceneManager.clearScene();
				}
				if (ImGui::MenuItem("Open Scene", "Ctrl+O")) {
					// TODO: Implement scene loading
				}
				if (ImGui::MenuItem("Save Scene", "Ctrl+S")) {
					// TODO: Implement scene saving
				}
				ImGui::Separator();
				if (ImGui::MenuItem("Exit", "Alt+F4")) {
					example->prepared = false;
				}
				ImGui::EndMenu();
			}
			if (ImGui::BeginMenu("Preferences"))
			{
				if (ImGui::BeginMenu("UI Theme"))
				{
					if (ImGui::MenuItem("Vulkan Red", nullptr, selectedStyle == 0)) { setStyle(0); selectedStyle = 0; }
					if (ImGui::MenuItem("Classic", nullptr, selectedStyle == 1)) { setStyle(1); selectedStyle = 1; }
					if (ImGui::MenuItem("Dark", nullptr, selectedStyle == 2)) { setStyle(2); selectedStyle = 2; }
					if (ImGui::MenuItem("Light", nullptr, selectedStyle == 3)) { setStyle(3); selectedStyle = 3; }
					if (ImGui::MenuItem("Blue", nullptr, selectedStyle == 4)) { setStyle(4); selectedStyle = 4; }
					if (ImGui::MenuItem("Green", nullptr, selectedStyle == 5)) { setStyle(5); selectedStyle = 5; }
					if (ImGui::MenuItem("Purple", nullptr, selectedStyle == 6)) { setStyle(6); selectedStyle = 6; }
					ImGui::EndMenu();
				}
				ImGui::Separator();
				// Viewport settings moved to dedicated Viewport panel
				ImGui::EndMenu();
			}
			if (ImGui::BeginMenu("Windows"))
			{
				ImGui::MenuItem("Scene Hierarchy", nullptr, &uiSettings.showSceneHierarchyPanel);
				ImGui::MenuItem("Inspector", nullptr, &uiSettings.showInspectorPanel);
				ImGui::MenuItem("Viewport", nullptr, &uiSettings.showViewportPanel);
				ImGui::MenuItem("Asset Browser", nullptr, &uiSettings.showAssetBrowserPanel);
				ImGui::MenuItem("Console", nullptr, &uiSettings.showConsolePanel);
				ImGui::Separator();
				if (ImGui::MenuItem("Show All Panels")) {
					uiSettings.showSceneHierarchyPanel = true;
					uiSettings.showInspectorPanel = true;
					uiSettings.showViewportPanel = true;
					uiSettings.showAssetBrowserPanel = true;
					uiSettings.showConsolePanel = true;
				}
				if (ImGui::MenuItem("Hide All Panels")) {
					uiSettings.showSceneHierarchyPanel = false;
					uiSettings.showInspectorPanel = false;
					uiSettings.showViewportPanel = false;
					uiSettings.showAssetBrowserPanel = false;
					uiSettings.showConsolePanel = false;
				}
				ImGui::EndMenu();
			}
			if (ImGui::BeginMenu("Help"))
			{
				if (ImGui::MenuItem("About")) {
					// TODO: Show about dialog
				}
				ImGui::EndMenu();
			}
			ImGui::EndMainMenuBar();
		}

		// Init imGui windows and elements

		// Debug window
		ImGui::SetWindowPos(ImVec2(20 * example->ui.scale, 20 * example->ui.scale), ImGuiSetCond_FirstUseEver);
        ImGui::SetWindowSize(ImVec2(300 * example->ui.scale, 300 * example->ui.scale), ImGuiSetCond_Always);
		ImGui::TextUnformatted(example->title.c_str());
		ImGui::TextUnformatted(device->properties.deviceName);
		
		//SRS - Display Vulkan API version and device driver information if available (otherwise blank)
		ImGui::Text("Vulkan API %i.%i.%i", VK_API_VERSION_MAJOR(device->properties.apiVersion), VK_API_VERSION_MINOR(device->properties.apiVersion), VK_API_VERSION_PATCH(device->properties.apiVersion));
		ImGui::Text("%s %s", driverProperties.driverName, driverProperties.driverInfo);

		// Update frame time display
		if (updateFrameGraph) {
			std::rotate(uiSettings.frameTimes.begin(), uiSettings.frameTimes.begin() + 1, uiSettings.frameTimes.end());
			float frameTime = 1000.0f / (example->frameTimer * 1000.0f);
			uiSettings.frameTimes.back() = frameTime;
			if (frameTime < uiSettings.frameTimeMin) {
				uiSettings.frameTimeMin = frameTime;
			}
			if (frameTime > uiSettings.frameTimeMax) {
				uiSettings.frameTimeMax = frameTime;
			}
		}

		ImGui::PlotLines("Frame Times", &uiSettings.frameTimes[0], 50, 0, "", uiSettings.frameTimeMin, uiSettings.frameTimeMax, ImVec2(0, 80));

		ImGui::Text("Orbit Camera");
		ImGui::Text("Enhanced camera system active");
		ImGui::Separator();
		ImGui::Text("Controls:");
		ImGui::BulletText("F - Focus on selection");
		ImGui::BulletText("Alt+LMB - Orbit");
		ImGui::BulletText("Alt+MMB - Pan");
		ImGui::BulletText("Alt+RMB - Zoom");
		ImGui::BulletText("Mouse Wheel - Zoom");


		// Simple Scene Hierarchy Panel
		if (uiSettings.showSceneHierarchyPanel) {
			ImGui::SetNextWindowPos(ImVec2(20 * example->ui.scale, 360 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::SetNextWindowSize(ImVec2(300 * example->ui.scale, 400 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::Begin("Scene Hierarchy", &uiSettings.showSceneHierarchyPanel);
		
		// Header with object count
		ImGui::Text("Scene Objects: %d", sceneManager.getObjectCount());
		ImGui::Separator();
		
		// Render simple object list
		for (int i = 0; i < sceneManager.objects.size(); i++) {
			const auto& obj = sceneManager.objects[i];
			bool isSelected = (sceneManager.selectedIndex == i);
			
			// Object icon based on type
			const char* icon = "[P]"; // Default procedural icon
			if (obj.type == "Model") icon = "[M]";
			
			// Visibility toggle (use object name as unique ImGui ID)
			ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0, 0, 0, 0));
			ImGui::PushID(obj.name.c_str());  // Use object name for unique ImGui ID
			if (ImGui::SmallButton(obj.visible ? "V" : "H")) {
				// Toggle visibility (note: const_cast needed for modification)
				const_cast<SceneObject&>(obj).visible = !obj.visible;
			}
			ImGui::PopID();
			ImGui::PopStyleColor();
			ImGui::SameLine();
			
			// Selectable object name with highlighting for selected objects
			if (isSelected) {
				ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(1.0f, 0.8f, 0.2f, 1.0f)); // Gold color for selected
			}
			if (ImGui::Selectable((std::string(icon) + " " + obj.name).c_str(), isSelected)) {
				sceneManager.setSelectedIndex(i);
				std::cout << "Selected object: " << obj.name << std::endl;
			}
			if (isSelected) {
				ImGui::PopStyleColor();
			}
			
			// Right-click context menu
			if (ImGui::BeginPopupContextItem()) {
				if (ImGui::MenuItem("Delete", "Del")) {
					sceneManager.removeObject(i);
					ImGui::EndPopup();
					break; // Exit loop since we modified the vector
				}
				ImGui::EndPopup();
			}
		}
		
		// Show message if scene is empty
		if (sceneManager.getObjectCount() == 0) {
			ImGui::Spacing();
			ImGui::TextColored(ImVec4(0.7f, 0.7f, 0.7f, 1.0f), "Scene is empty");
			ImGui::TextColored(ImVec4(0.7f, 0.7f, 0.7f, 1.0f), "Add objects from Asset Browser");
		}
		
		ImGui::End();
		} // End Scene Hierarchy Panel visibility check

		// Inspector Panel
		if (uiSettings.showInspectorPanel) {
			ImGui::SetNextWindowPos(ImVec2(1180 * example->ui.scale, 20 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::SetNextWindowSize(ImVec2(300 * example->ui.scale, 700 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::Begin("Inspector", &uiSettings.showInspectorPanel);
		ImGui::Text("Object Properties:");
		ImGui::Separator();
		
		if (sceneManager.selectedIndex >= 0 && sceneManager.selectedIndex < sceneManager.objects.size()) {
			auto& selectedObj = sceneManager.objects[sceneManager.selectedIndex];  // Non-const for editing
			
			// Object Header with Name and Type
			ImGui::Text("Selected: %s", selectedObj.name.c_str());
			ImGui::SameLine();
			ImGui::TextColored(ImVec4(0.6f, 0.6f, 0.6f, 1.0f), "(%s)", selectedObj.type.c_str());
			ImGui::Separator();
			
			// Transform Section (collapsible like legacy 3D engine)
			if (ImGui::CollapsingHeader("Transform", ImGuiTreeNodeFlags_DefaultOpen)) {
				// Position Vector3 control
				float pos[3] = { selectedObj.position.x, selectedObj.position.y, selectedObj.position.z };
				if (ImGui::DragFloat3("Position", pos, 0.1f)) {
					selectedObj.position = glm::vec3(pos[0], pos[1], pos[2]);
				}
				ImGui::SameLine();
				if (ImGui::SmallButton("Reset##pos")) {
					selectedObj.position = glm::vec3(0.0f, 0.0f, 0.0f);
				}
				
				// Rotation Vector3 control (degrees)
				float rot[3] = { selectedObj.rotation.x, selectedObj.rotation.y, selectedObj.rotation.z };
				if (ImGui::DragFloat3("Rotation", rot, 1.0f, -360.0f, 360.0f)) {
					selectedObj.rotation = glm::vec3(rot[0], rot[1], rot[2]);
				}
				ImGui::SameLine();
				if (ImGui::SmallButton("Reset##rot")) {
					selectedObj.rotation = glm::vec3(0.0f, 0.0f, 0.0f);
				}
				
				// Scale Vector3 control
				float scale[3] = { selectedObj.scale.x, selectedObj.scale.y, selectedObj.scale.z };
				if (ImGui::DragFloat3("Scale", scale, 0.01f, 0.01f, 10.0f)) {
					selectedObj.scale = glm::vec3(scale[0], scale[1], scale[2]);
				}
				ImGui::SameLine();
				if (ImGui::SmallButton("Reset##scale")) {
					selectedObj.scale = glm::vec3(1.0f, 1.0f, 1.0f);  // Default scale is 1.0
				}
				
				// Transform utilities
				ImGui::Spacing();
				if (ImGui::Button("Reset All Transform")) {
					selectedObj.position = glm::vec3(0.0f, 0.0f, 0.0f);
					selectedObj.rotation = glm::vec3(0.0f, 0.0f, 0.0f);
					selectedObj.scale = glm::vec3(1.0f, 1.0f, 1.0f);
				}
			}
			
			// Object Properties Section
			if (ImGui::CollapsingHeader("Object Properties", ImGuiTreeNodeFlags_DefaultOpen)) {
				// Visibility toggle
				bool visible = selectedObj.visible;
				if (ImGui::Checkbox("Visible", &visible)) {
					selectedObj.visible = visible;
				}
				
				// Object name editing
				static char nameBuffer[256];
				strncpy_s(nameBuffer, selectedObj.name.c_str(), sizeof(nameBuffer) - 1);
				if (ImGui::InputText("Name", nameBuffer, sizeof(nameBuffer))) {
					selectedObj.name = std::string(nameBuffer);
				}
			}
			
			// Procedural Parameters Section (for procedural shapes)
			if (selectedObj.type == "Procedural") {
				if (ImGui::CollapsingHeader("Procedural Parameters", ImGuiTreeNodeFlags_DefaultOpen)) {
					ImGui::Text("Shape Type: %s", selectedObj.subtype.c_str());
					
					// Dynamic parameter controls based on shape type
					bool parametersChanged = false;
					
					if (selectedObj.subtype == "Cube") {
						ImGui::Text("Cube Parameters:");
						ImGui::Separator();
						
						if (ImGui::DragFloat("Width", &selectedObj.proceduralParams.cubeWidth, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::DragFloat("Height", &selectedObj.proceduralParams.cubeHeight, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::DragFloat("Depth", &selectedObj.proceduralParams.cubeDepth, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Subdivisions", &selectedObj.proceduralParams.cubeSubdivisions, 1, 10)) {
							parametersChanged = true;
						}
						
						if (ImGui::Button("Reset Cube Parameters")) {
							selectedObj.proceduralParams.cubeWidth = 2.0f;
							selectedObj.proceduralParams.cubeHeight = 2.0f;
							selectedObj.proceduralParams.cubeDepth = 2.0f;
							selectedObj.proceduralParams.cubeSubdivisions = 1;
							parametersChanged = true;
						}
						
					} else if (selectedObj.subtype == "Sphere") {
						ImGui::Text("Sphere Parameters:");
						ImGui::Separator();
						
						if (ImGui::DragFloat("Radius", &selectedObj.proceduralParams.sphereRadius, 0.05f, 0.1f, 5.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Segments", &selectedObj.proceduralParams.sphereSegments, 4, 64)) {
							parametersChanged = true;
						}
						
						if (ImGui::Button("Reset Sphere Parameters")) {
							selectedObj.proceduralParams.sphereRadius = 1.0f;
							selectedObj.proceduralParams.sphereSegments = 16;
							parametersChanged = true;
						}
						
					} else if (selectedObj.subtype == "Cylinder") {
						ImGui::Text("Cylinder Parameters:");
						ImGui::Separator();
						
						if (ImGui::DragFloat("Radius", &selectedObj.proceduralParams.cylinderRadius, 0.05f, 0.1f, 5.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::DragFloat("Height", &selectedObj.proceduralParams.cylinderHeight, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Segments", &selectedObj.proceduralParams.cylinderSegments, 3, 64)) {
							parametersChanged = true;
						}
						
						if (ImGui::Button("Reset Cylinder Parameters")) {
							selectedObj.proceduralParams.cylinderRadius = 1.0f;
							selectedObj.proceduralParams.cylinderHeight = 2.0f;
							selectedObj.proceduralParams.cylinderSegments = 16;
							parametersChanged = true;
						}
						
					} else if (selectedObj.subtype == "Cone") {
						ImGui::Text("Cone Parameters:");
						ImGui::Separator();
						
						if (ImGui::DragFloat("Radius", &selectedObj.proceduralParams.coneRadius, 0.05f, 0.1f, 5.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::DragFloat("Height", &selectedObj.proceduralParams.coneHeight, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Segments", &selectedObj.proceduralParams.coneSegments, 3, 64)) {
							parametersChanged = true;
						}
						
						if (ImGui::Button("Reset Cone Parameters")) {
							selectedObj.proceduralParams.coneRadius = 1.0f;
							selectedObj.proceduralParams.coneHeight = 2.0f;
							selectedObj.proceduralParams.coneSegments = 16;
							parametersChanged = true;
						}
						
					} else if (selectedObj.subtype == "Plane") {
						ImGui::Text("Plane Parameters:");
						ImGui::Separator();
						
						if (ImGui::DragFloat("Width", &selectedObj.proceduralParams.planeWidth, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::DragFloat("Height", &selectedObj.proceduralParams.planeHeight, 0.1f, 0.1f, 10.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Subdivisions", &selectedObj.proceduralParams.planeSubdivisions, 1, 20)) {
							parametersChanged = true;
						}
						
						if (ImGui::Button("Reset Plane Parameters")) {
							selectedObj.proceduralParams.planeWidth = 2.0f;
							selectedObj.proceduralParams.planeHeight = 2.0f;
							selectedObj.proceduralParams.planeSubdivisions = 1;
							parametersChanged = true;
						}
						
					} else if (selectedObj.subtype == "Torus") {
						ImGui::Text("Torus Parameters:");
						ImGui::Separator();
						
						if (ImGui::DragFloat("Major Radius", &selectedObj.proceduralParams.torusMajorRadius, 0.05f, 0.2f, 5.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::DragFloat("Minor Radius", &selectedObj.proceduralParams.torusMinorRadius, 0.02f, 0.05f, 2.0f, "%.2f")) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Major Segments", &selectedObj.proceduralParams.torusMajorSegments, 3, 64)) {
							parametersChanged = true;
						}
						if (ImGui::SliderInt("Minor Segments", &selectedObj.proceduralParams.torusMinorSegments, 3, 32)) {
							parametersChanged = true;
						}
						
						if (ImGui::Button("Reset Torus Parameters")) {
							selectedObj.proceduralParams.torusMajorRadius = 1.0f;
							selectedObj.proceduralParams.torusMinorRadius = 0.3f;
							selectedObj.proceduralParams.torusMajorSegments = 16;
							selectedObj.proceduralParams.torusMinorSegments = 8;
							parametersChanged = true;
						}
					}
					
					// Regenerate geometry if parameters changed
					if (parametersChanged) {
						selectedObj.regenerateGeometry();
						std::cout << "Regenerated geometry for " << selectedObj.name << " (" << selectedObj.subtype << ")" << std::endl;
					}
					
					ImGui::Spacing();
					ImGui::TextColored(ImVec4(0.4f, 1.0f, 0.4f, 1.0f), "✓ Real-time parameter editing enabled");
				}
			}
		} else {
			ImGui::Text("Selected: None");
			ImGui::Text("Select an object in the Scene Hierarchy");
			ImGui::Separator();
		}
		
		
		
		// UI Style selection is available in Preferences > UI Theme menu

		ImGui::End();
		} // End Inspector Panel visibility check

		// Viewport Panel - Settings for 3D viewport rendering
		if (uiSettings.showViewportPanel) {
			ImGui::SetNextWindowPos(ImVec2(660 * example->ui.scale, 350 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::SetNextWindowSize(ImVec2(320 * example->ui.scale, 280 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::Begin("Viewport", &uiSettings.showViewportPanel);
		
		ImGui::Text("3D Viewport Settings:");
		ImGui::Separator();
		
		// Render Mode Settings
		if (ImGui::CollapsingHeader("Render Mode", ImGuiTreeNodeFlags_DefaultOpen))
		{
			// TODO: Add render mode dropdown (Solid, X-Ray, etc.) when renderer supports it
			ImGui::Text("Mode: Solid"); // Placeholder until render modes implemented
		}
		
		// Grid Settings (moved from Inspector)
		if (ImGui::CollapsingHeader("Grid Settings", ImGuiTreeNodeFlags_DefaultOpen))
		{
			ImGui::Checkbox("Show Grid", &uiSettings.showGrid);
			if (uiSettings.showGrid) {
				ImGui::DragFloat("Grid Size", &uiSettings.gridSize, 0.5f, 1.0f, 50.0f);
				ImGui::DragInt("Grid Divisions", &uiSettings.gridDivisions, 1, 2, 50);
				
				// Grid color picker (placeholder - needs renderer integration)
				static float gridColor[3] = { 0.5f, 0.5f, 0.5f };
				ImGui::ColorEdit3("Grid Color", gridColor);
			}
			
			// Note about grid rendering implementation
			ImGui::TextColored(ImVec4(0.7f, 0.7f, 0.3f, 1.0f), "Note: Grid rendering requires Vulkan renderer integration.");
			ImGui::TextColored(ImVec4(0.6f, 0.6f, 0.6f, 1.0f), "Settings are saved but grid is not yet rendered in viewport.");
		}
		
		// Camera Settings
		if (ImGui::CollapsingHeader("Camera", ImGuiTreeNodeFlags_DefaultOpen))
		{
			ImGui::Text("Current Camera: Orbit Camera");
			ImGui::Text("Controls:");
			ImGui::BulletText("Alt + LMB: Orbit");
			ImGui::BulletText("Alt + MMB: Pan");
			ImGui::BulletText("Alt + RMB: Zoom");
			ImGui::BulletText("Mouse Wheel: Zoom");
			ImGui::BulletText("F Key: Focus Selection");
		}
		
		// Selection Tools
		if (ImGui::CollapsingHeader("Selection Tools"))
		{
			ImGui::Text("Active Tool: Rectangle Select");
			// TODO: Add gizmo tool selection when gizmos implemented
		}
		
		// Lighting Settings (moved from Inspector panel)
		if (ImGui::CollapsingHeader("Lighting", ImGuiTreeNodeFlags_DefaultOpen))
		{
			ImGui::Checkbox("Animate light", &uiSettings.animateLight);
			ImGui::SliderFloat("Light speed", &uiSettings.lightSpeed, 0.1f, 1.0f);
		}
		
		ImGui::End();
		} // End Viewport Panel visibility check

		// Asset Browser Panel
		if (uiSettings.showAssetBrowserPanel) {
			ImGui::SetNextWindowPos(ImVec2(20 * example->ui.scale, 780 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::SetNextWindowSize(ImVec2(600 * example->ui.scale, 220 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::Begin("Asset Browser", &uiSettings.showAssetBrowserPanel);
		ImGui::Text("Project Assets:");
		ImGui::Separator();
		
		if (ImGui::CollapsingHeader("Procedural Shapes", ImGuiTreeNodeFlags_DefaultOpen))
		{
			ImGui::Text("Basic Geometric Shapes:");
			ImGui::Separator();
			
			// Create buttons for each shape type - First row
			if (ImGui::Button("Cube")) {
				sceneManager.addProceduralShape("Cube", "Cube");
			}
			if (ImGui::IsItemHovered()) ImGui::SetTooltip("Add a procedural cube to the scene");
			ImGui::SameLine();
			if (ImGui::Button("Sphere")) {
				sceneManager.addProceduralShape("Sphere", "Sphere");
			}
			if (ImGui::IsItemHovered()) ImGui::SetTooltip("Add a procedural sphere to the scene");
			ImGui::SameLine();
			if (ImGui::Button("Plane")) {
				sceneManager.addProceduralShape("Plane", "Plane");
			}
			if (ImGui::IsItemHovered()) ImGui::SetTooltip("Add a procedural plane to the scene");
			
			// Second row
			if (ImGui::Button("Cone")) {
				sceneManager.addProceduralShape("Cone", "Cone");
			}
			if (ImGui::IsItemHovered()) ImGui::SetTooltip("Add a procedural cone to the scene");
			ImGui::SameLine();
			if (ImGui::Button("Cylinder")) {
				sceneManager.addProceduralShape("Cylinder", "Cylinder");
			}
			if (ImGui::IsItemHovered()) ImGui::SetTooltip("Add a procedural cylinder to the scene");
			ImGui::SameLine();
			if (ImGui::Button("Torus")) {
				sceneManager.addProceduralShape("Torus", "Torus");
			}
			if (ImGui::IsItemHovered()) ImGui::SetTooltip("Add a procedural torus to the scene");
		}
		
		if (ImGui::CollapsingHeader("Models"))
		{
			ImGui::Text("• MobulaBirostris.gltf");
			ImGui::Text("• PolarBear.gltf");
		}
		if (ImGui::CollapsingHeader("Textures"))
		{
			ImGui::Text("• Loading textures from glTF files...");
		}
		if (ImGui::CollapsingHeader("Materials"))
		{
			ImGui::Text("• Default Vulkan Materials");
		}
		ImGui::End();
		} // End Asset Browser Panel visibility check

		// Console Panel
		if (uiSettings.showConsolePanel) {
			ImGui::SetNextWindowPos(ImVec2(640 * example->ui.scale, 780 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::SetNextWindowSize(ImVec2(840 * example->ui.scale, 200 * example->ui.scale), ImGuiSetCond_FirstUseEver);
			ImGui::Begin("Console", &uiSettings.showConsolePanel);
		ImGui::Text("System Console:");
		ImGui::Separator();
		ImGui::Text("[INFO] ProceduralEngine - Vulkan Renderer initialized");
		ImGui::Text("[INFO] Scene loaded successfully - Ready for procedural generation");
		ImGui::Separator();
		static char inputBuf[256] = "";
		if (ImGui::InputText("Command", inputBuf, sizeof(inputBuf), ImGuiInputTextFlags_EnterReturnsTrue))
		{
			// Process command
			inputBuf[0] = '\0';
		}
		ImGui::End();
		} // End Console Panel visibility check

		//SRS - ShowDemoWindow() sets its own initial position and size, cannot override here
		// ImGui::ShowDemoWindow();

		// Render to generate draw buffers
		ImGui::Render();
	}

	// Update vertex and index buffer containing the imGui elements when required
	void updateBuffers()
	{
		ImDrawData* imDrawData = ImGui::GetDrawData();

		// Note: Alignment is done inside buffer creation
		VkDeviceSize vertexBufferSize = imDrawData->TotalVtxCount * sizeof(ImDrawVert);
		VkDeviceSize indexBufferSize = imDrawData->TotalIdxCount * sizeof(ImDrawIdx);

		if ((vertexBufferSize == 0) || (indexBufferSize == 0)) {
			return;
		}

		// Update buffers only if vertex or index count has been changed compared to current buffer size

		// Vertex buffer
		if ((vertexBuffer.buffer == VK_NULL_HANDLE) || (vertexCount != imDrawData->TotalVtxCount)) {
			vertexBuffer.unmap();
			vertexBuffer.destroy();
			VK_CHECK_RESULT(device->createBuffer(VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &vertexBuffer, vertexBufferSize));
			vertexCount = imDrawData->TotalVtxCount;
			vertexBuffer.map();
		}

		// Index buffer
		if ((indexBuffer.buffer == VK_NULL_HANDLE) || (indexCount < imDrawData->TotalIdxCount)) {
			indexBuffer.unmap();
			indexBuffer.destroy();
			VK_CHECK_RESULT(device->createBuffer(VK_BUFFER_USAGE_INDEX_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &indexBuffer, indexBufferSize));
			indexCount = imDrawData->TotalIdxCount;
			indexBuffer.map();
		}

		// Upload data
		ImDrawVert* vtxDst = (ImDrawVert*)vertexBuffer.mapped;
		ImDrawIdx* idxDst = (ImDrawIdx*)indexBuffer.mapped;

		for (int n = 0; n < imDrawData->CmdListsCount; n++) {
			const ImDrawList* cmd_list = imDrawData->CmdLists[n];
			memcpy(vtxDst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
			memcpy(idxDst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
			vtxDst += cmd_list->VtxBuffer.Size;
			idxDst += cmd_list->IdxBuffer.Size;
		}

		// Flush to make writes visible to GPU
		vertexBuffer.flush();
		indexBuffer.flush();
	}

	// Draw current imGui frame into a command buffer
	void drawFrame(VkCommandBuffer commandBuffer)
	{
		ImGuiIO& io = ImGui::GetIO();

		vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
		vkCmdBindPipeline(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);

		VkViewport viewport = vks::initializers::viewport(ImGui::GetIO().DisplaySize.x, ImGui::GetIO().DisplaySize.y, 0.0f, 1.0f);
		vkCmdSetViewport(commandBuffer, 0, 1, &viewport);

		// UI scale and translate via push constants
		pushConstBlock.scale = glm::vec2(2.0f / io.DisplaySize.x, 2.0f / io.DisplaySize.y);
		pushConstBlock.translate = glm::vec2(-1.0f);
		vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);

		// Render commands
		ImDrawData* imDrawData = ImGui::GetDrawData();
		int32_t vertexOffset = 0;
		int32_t indexOffset = 0;

		if (imDrawData->CmdListsCount > 0) {

			VkDeviceSize offsets[1] = { 0 };
			vkCmdBindVertexBuffers(commandBuffer, 0, 1, &vertexBuffer.buffer, offsets);
			vkCmdBindIndexBuffer(commandBuffer, indexBuffer.buffer, 0, VK_INDEX_TYPE_UINT16);

			for (int32_t i = 0; i < imDrawData->CmdListsCount; i++)
			{
				const ImDrawList* cmd_list = imDrawData->CmdLists[i];
				for (int32_t j = 0; j < cmd_list->CmdBuffer.Size; j++)
				{
					const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[j];
					VkRect2D scissorRect;
					scissorRect.offset.x = std::max((int32_t)(pcmd->ClipRect.x), 0);
					scissorRect.offset.y = std::max((int32_t)(pcmd->ClipRect.y), 0);
					scissorRect.extent.width = (uint32_t)(pcmd->ClipRect.z - pcmd->ClipRect.x);
					scissorRect.extent.height = (uint32_t)(pcmd->ClipRect.w - pcmd->ClipRect.y);
					vkCmdSetScissor(commandBuffer, 0, 1, &scissorRect);
					vkCmdDrawIndexed(commandBuffer, pcmd->ElemCount, 1, indexOffset, vertexOffset, 0);
					indexOffset += pcmd->ElemCount;
				}
#if (defined(VK_USE_PLATFORM_IOS_MVK) || defined(VK_USE_PLATFORM_METAL_EXT)) && TARGET_OS_SIMULATOR
				// Apple Device Simulator does not support vkCmdDrawIndexed() with vertexOffset > 0, so rebind vertex buffer instead
				offsets[0] += cmd_list->VtxBuffer.Size * sizeof(ImDrawVert);
				vkCmdBindVertexBuffers(commandBuffer, 0, 1, &vertexBuffer.buffer, offsets);
#else
				vertexOffset += cmd_list->VtxBuffer.Size;
#endif
			}
		}
	}

};

// ----------------------------------------------------------------------------
// VulkanExample
// ----------------------------------------------------------------------------

class VulkanExample : public VulkanExampleBase
{
public:
	// Dynamic rendering function pointers
	PFN_vkCmdBeginRenderingKHR vkCmdBeginRenderingKHR{ VK_NULL_HANDLE };
	PFN_vkCmdEndRenderingKHR vkCmdEndRenderingKHR{ VK_NULL_HANDLE };

	VkPhysicalDeviceDynamicRenderingFeaturesKHR enabledDynamicRenderingFeaturesKHR{};

	ImGUI *imGui = nullptr;

	struct Models {
		vkglTF::Model models;
		vkglTF::Model logos;
		vkglTF::Model background;
	} models;


	vks::Buffer uniformBufferVS;

	struct UBOVS {
		glm::mat4 projection;
		glm::mat4 model;
		glm::vec4 lightPos;
	} uboVS;

	VkPipelineLayout pipelineLayout;
	VkPipeline pipeline;
	VkDescriptorSetLayout descriptorSetLayout;
	VkDescriptorSet descriptorSet;

	// Procedural shapes pipeline
	VkPipelineLayout proceduralPipelineLayout;
	VkPipeline proceduralPipeline;
	VkDescriptorSetLayout proceduralDescriptorSetLayout;
	VkDescriptorSet proceduralDescriptorSet;
	
	// Enhanced orbit camera
	OrbitCamera orbitCamera;
	
	// Mouse interaction state
	bool mouseInteracting = false;
	double lastMouseX = 0.0;
	double lastMouseY = 0.0;

	VulkanExample() : VulkanExampleBase(), orbitCamera(glm::vec3(5.0f, 3.0f, 5.0f), glm::vec3(0.0f, 0.0f, -5.0f))
	{
		title = "ProceduralEngine - Vulkan 3D Viewport";
		camera.type = Camera::CameraType::lookat;
		camera.setPosition(glm::vec3(0.0f, 0.0f, -8.0f));
		camera.setRotation(glm::vec3(4.5f, -380.0f, 0.0f));
		camera.setPerspective(45.0f, (float)width / (float)height, 0.1f, 256.0f);
		
		// Configure orbit camera with legacy-compatible settings
		orbitCamera.SetSensitivity(0.5f, 0.003f, 0.1f); // Match legacy sensitivity values
		orbitCamera.SetSmoothingFactor(0.15f); // Match legacy smoothing
		
		//SRS - Enable VK_KHR_get_physical_device_properties2 to retrieve device driver information for display
		enabledInstanceExtensions.push_back(VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME);

		// Enable dynamic rendering extensions
		enabledDeviceExtensions.push_back(VK_KHR_DYNAMIC_RENDERING_EXTENSION_NAME);
		enabledDeviceExtensions.push_back(VK_KHR_MAINTENANCE2_EXTENSION_NAME);
		enabledDeviceExtensions.push_back(VK_KHR_MULTIVIEW_EXTENSION_NAME);
		enabledDeviceExtensions.push_back(VK_KHR_CREATE_RENDERPASS_2_EXTENSION_NAME);
		enabledDeviceExtensions.push_back(VK_KHR_DEPTH_STENCIL_RESOLVE_EXTENSION_NAME);

		// Enable dynamic rendering features
		enabledDynamicRenderingFeaturesKHR.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DYNAMIC_RENDERING_FEATURES_KHR;
		enabledDynamicRenderingFeaturesKHR.dynamicRendering = VK_TRUE;

		deviceCreatepNextChain = &enabledDynamicRenderingFeaturesKHR;

		// Don't use the ImGui overlay of the base framework in this sample
		settings.overlay = false;
	}

	~VulkanExample()
	{
		vkDestroyPipeline(device, pipeline, nullptr);
		vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
		vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);

		vkDestroyPipeline(device, proceduralPipeline, nullptr);
		vkDestroyPipelineLayout(device, proceduralPipelineLayout, nullptr);
		vkDestroyDescriptorSetLayout(device, proceduralDescriptorSetLayout, nullptr);

		uniformBufferVS.destroy();

		delete imGui;
	}

	void setupRenderPass()
	{
		// With VK_KHR_dynamic_rendering we no longer need a render pass, so skip the sample base render pass setup
		renderPass = VK_NULL_HANDLE;
	}

	void setupFrameBuffer()
	{
		// With VK_KHR_dynamic_rendering we no longer need a frame buffer, so skip the sample base framebuffer setup
	}

	void renderProceduralShapes(VkCommandBuffer commandBuffer) {
		// Render procedural shapes using persistent buffers
		static int frameCount = 0;
		frameCount++;
		
		for (auto& obj : sceneManager.objects) {
			if (obj.type == "Procedural" && obj.visible && !obj.indices.empty() && obj.buffersCreated) {
				// Calculate model matrix for this object
				glm::mat4 model = glm::mat4(1.0f);
				model = glm::translate(model, obj.position);
				model = glm::rotate(model, glm::radians(obj.rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
				model = glm::rotate(model, glm::radians(obj.rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
				model = glm::rotate(model, glm::radians(obj.rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
				model = glm::scale(model, obj.scale);
				
				// Update uniform buffer with object's model matrix while preserving camera matrices
				UBOVS tempUBO;
				tempUBO.projection = orbitCamera.GetProjectionMatrix((float)width / (float)height, 0.1f, 256.0f);  // Use OrbitCamera projection
				tempUBO.model = orbitCamera.GetViewMatrix() * model;      // Combine view and model matrices
				tempUBO.lightPos = uboVS.lightPos;                 // Preserve light position
				
				VK_CHECK_RESULT(uniformBufferVS.map());
				memcpy(uniformBufferVS.mapped, &tempUBO, sizeof(tempUBO));
				uniformBufferVS.unmap();
				
				// Validate buffers before binding
				if (obj.vertexBuffer.buffer == VK_NULL_HANDLE || obj.indexBuffer.buffer == VK_NULL_HANDLE) {
					std::cout << "Warning: Invalid buffer handles for " << obj.name << std::endl;
					continue;
				}
				
				// Bind the vertex and index buffers for this object
				VkBuffer vertexBuffers[] = { obj.vertexBuffer.buffer };
				VkDeviceSize offsets[] = { 0 };
				vkCmdBindVertexBuffers(commandBuffer, 0, 1, vertexBuffers, offsets);
				vkCmdBindIndexBuffer(commandBuffer, obj.indexBuffer.buffer, 0, VK_INDEX_TYPE_UINT32);
				
				// Draw the object
				vkCmdDrawIndexed(commandBuffer, static_cast<uint32_t>(obj.indices.size()), 1, 0, 0, 0);
			}
		}
	}

	void buildCommandBuffers()
	{
		VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();

		imGui->newFrame(this, (frameCounter == 0));
		imGui->updateBuffers();

		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
		{
			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));

			// Dynamic rendering requires manual image layout transitions
			// Prepare color attachment for rendering
			vks::tools::insertImageMemoryBarrier(
				drawCmdBuffers[i],
				swapChain.images[i],
				0,
				VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
				VK_IMAGE_LAYOUT_UNDEFINED,
				VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
				VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
				VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
				VkImageSubresourceRange{ VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 });

			// Prepare depth attachment for rendering
			vks::tools::insertImageMemoryBarrier(
				drawCmdBuffers[i],
				depthStencil.image,
				0,
				VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT,
				VK_IMAGE_LAYOUT_UNDEFINED,
				VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
				VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT,
				VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT | VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT,
				VkImageSubresourceRange{ VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT, 0, 1, 0, 1 });

			// Set up rendering attachments for dynamic rendering
			VkRenderingAttachmentInfoKHR colorAttachment{};
			colorAttachment.sType = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO_KHR;
			colorAttachment.imageView = swapChain.imageViews[i];
			colorAttachment.imageLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
			colorAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
			colorAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
			colorAttachment.clearValue.color = { 0.2f, 0.2f, 0.2f, 1.0f };

			VkRenderingAttachmentInfoKHR depthStencilAttachment{};
			depthStencilAttachment.sType = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO_KHR;
			depthStencilAttachment.imageView = depthStencil.view;
			depthStencilAttachment.imageLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
			depthStencilAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
			depthStencilAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
			depthStencilAttachment.clearValue.depthStencil = { 1.0f, 0 };

			VkRenderingInfoKHR renderingInfo{};
			renderingInfo.sType = VK_STRUCTURE_TYPE_RENDERING_INFO_KHR;
			renderingInfo.renderArea = { 0, 0, width, height };
			renderingInfo.layerCount = 1;
			renderingInfo.colorAttachmentCount = 1;
			renderingInfo.pColorAttachments = &colorAttachment;
			renderingInfo.pDepthAttachment = &depthStencilAttachment;
			renderingInfo.pStencilAttachment = &depthStencilAttachment;

			// Begin dynamic rendering
			vkCmdBeginRenderingKHR(drawCmdBuffers[i], &renderingInfo);

			VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);

			VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
			vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);

			// Render vkglTF models with original pipeline
			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);

			if (uiSettings.displayBackground) {
				models.background.draw(drawCmdBuffers[i]);
			}

			if (uiSettings.displayModels) {
				models.models.draw(drawCmdBuffers[i]);
			}

			// Switch to procedural pipeline for procedural shapes
			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, proceduralPipelineLayout, 0, 1, &proceduralDescriptorSet, 0, nullptr);
			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, proceduralPipeline);

			// Render procedural shapes
			renderProceduralShapes(drawCmdBuffers[i]);

			// Render imGui
			if (ui.visible) {
				imGui->drawFrame(drawCmdBuffers[i]);
			}

			// End dynamic rendering
			vkCmdEndRenderingKHR(drawCmdBuffers[i]);

			// Prepare image for presentation
			vks::tools::insertImageMemoryBarrier(
				drawCmdBuffers[i],
				swapChain.images[i],
				VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
				0,
				VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
				VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
				VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT,
				VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,
				VkImageSubresourceRange{ VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 });

			VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
		}
	}

	void setupLayoutsAndDescriptors()
	{
		// descriptor pool (increased to handle procedural pipeline too)
		std::vector<VkDescriptorPoolSize> poolSizes = {
			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 4),
			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1)
		};
		VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 4);
		VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));

		// Set layout
		std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
			vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
		};
		VkDescriptorSetLayoutCreateInfo descriptorLayout =
			vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));

		// Pipeline layout
		VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
		VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayout));

		// Descriptor set
		VkDescriptorSetAllocateInfo allocInfo =	vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
		std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
			vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBufferVS.descriptor),
		};
		vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
		
		// Allocate procedural descriptor set (note: proceduralDescriptorSetLayout is created in prepareProceduralPipeline)
		// This will be done after pipelines are prepared
	}
	
	void setupProceduralDescriptorSet()
	{
		// Allocate procedural descriptor set
		VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &proceduralDescriptorSetLayout, 1);
		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &proceduralDescriptorSet));
		std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
			vks::initializers::writeDescriptorSet(proceduralDescriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBufferVS.descriptor),
		};
		vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
	}

	void preparePipelines()
	{
		// Rendering
		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0,	VK_FALSE);
		VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE);
		VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
		VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
		VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
		VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
		VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
		std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
		VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);

		std::array<VkPipelineShaderStageCreateInfo,2> shaderStages;

		// Create pipeline without render pass for dynamic rendering
		VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo();
		pipelineCI.layout = pipelineLayout;
		pipelineCI.pInputAssemblyState = &inputAssemblyState;
		pipelineCI.pRasterizationState = &rasterizationState;
		pipelineCI.pColorBlendState = &colorBlendState;
		pipelineCI.pMultisampleState = &multisampleState;
		pipelineCI.pViewportState = &viewportState;
		pipelineCI.pDepthStencilState = &depthStencilState;
		pipelineCI.pDynamicState = &dynamicState;
		pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
		pipelineCI.pStages = shaderStages.data();
		pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::Color });;

		// Dynamic rendering create info to define color, depth and stencil attachments at pipeline create time
		VkPipelineRenderingCreateInfoKHR pipelineRenderingCreateInfo{};
		pipelineRenderingCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR;
		pipelineRenderingCreateInfo.colorAttachmentCount = 1;
		pipelineRenderingCreateInfo.pColorAttachmentFormats = &swapChain.colorFormat;
		pipelineRenderingCreateInfo.depthAttachmentFormat = depthFormat;
		pipelineRenderingCreateInfo.stencilAttachmentFormat = depthFormat;
		// Chain into the pipeline create info
		pipelineCI.pNext = &pipelineRenderingCreateInfo;

		shaderStages[0] = loadShader(getShadersPath() + "imgui/scene.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
		shaderStages[1] = loadShader(getShadersPath() + "imgui/scene.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
		
		// Create procedural shapes pipeline
		prepareProceduralPipeline();
	}
	
	void prepareProceduralPipeline()
	{
		// Descriptor set layout for procedural shapes (uniform buffer only)
		VkDescriptorSetLayoutBinding layoutBinding = vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0);
		VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(&layoutBinding, 1);
		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &proceduralDescriptorSetLayout));

		// Pipeline layout
		VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&proceduralDescriptorSetLayout, 1);
		VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &proceduralPipelineLayout));

		// Pipeline
		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
		VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE);
		VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
		VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
		VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
		VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
		VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
		std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
		VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);

		// Vertex input for procedural shapes
		VkVertexInputBindingDescription vertexInputBinding = vks::initializers::vertexInputBindingDescription(0, sizeof(ProceduralVertex), VK_VERTEX_INPUT_RATE_VERTEX);
		std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
			vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0),					// Position
			vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 3),	// Normal
			vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 6),	// Color
		};
		VkPipelineVertexInputStateCreateInfo vertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
		vertexInputState.vertexBindingDescriptionCount = 1;
		vertexInputState.pVertexBindingDescriptions = &vertexInputBinding;
		vertexInputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertexInputAttributes.size());
		vertexInputState.pVertexAttributeDescriptions = vertexInputAttributes.data();

		std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;

		VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo();
		pipelineCI.layout = proceduralPipelineLayout;
		pipelineCI.pInputAssemblyState = &inputAssemblyState;
		pipelineCI.pRasterizationState = &rasterizationState;
		pipelineCI.pColorBlendState = &colorBlendState;
		pipelineCI.pMultisampleState = &multisampleState;
		pipelineCI.pViewportState = &viewportState;
		pipelineCI.pDepthStencilState = &depthStencilState;
		pipelineCI.pDynamicState = &dynamicState;
		pipelineCI.pVertexInputState = &vertexInputState;
		pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
		pipelineCI.pStages = shaderStages.data();

		// Dynamic rendering create info
		VkPipelineRenderingCreateInfoKHR pipelineRenderingCreateInfo{};
		pipelineRenderingCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR;
		pipelineRenderingCreateInfo.colorAttachmentCount = 1;
		pipelineRenderingCreateInfo.pColorAttachmentFormats = &swapChain.colorFormat;
		pipelineRenderingCreateInfo.depthAttachmentFormat = depthFormat;
		pipelineRenderingCreateInfo.stencilAttachmentFormat = depthFormat;
		pipelineCI.pNext = &pipelineRenderingCreateInfo;

		shaderStages[0] = loadShader(getShadersPath() + "imgui/scene.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
		shaderStages[1] = loadShader(getShadersPath() + "imgui/scene.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &proceduralPipeline));
	}

	// Prepare and initialize uniform buffer containing shader uniforms
	void prepareUniformBuffers()
	{
		// Vertex shader uniform buffer block
		VK_CHECK_RESULT(vulkanDevice->createBuffer(
			VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
			&uniformBufferVS,
			sizeof(uboVS),
			&uboVS));

		updateUniformBuffers();
	}

	void updateUniformBuffers()
	{
		// Update orbit camera
		orbitCamera.Update(frameTimer);
		
		// Vertex shader - use OrbitCamera matrices
		uboVS.projection = orbitCamera.GetProjectionMatrix((float)width / (float)height, 0.1f, 256.0f);
		uboVS.model = orbitCamera.GetViewMatrix() * glm::mat4(1.0f);

		// Light source
		if (uiSettings.animateLight) {
			uiSettings.lightTimer += frameTimer * uiSettings.lightSpeed;
			uboVS.lightPos.x = sin(glm::radians(uiSettings.lightTimer * 360.0f)) * 15.0f;
			uboVS.lightPos.z = cos(glm::radians(uiSettings.lightTimer * 360.0f)) * 15.0f;
		};

		VK_CHECK_RESULT(uniformBufferVS.map());
		memcpy(uniformBufferVS.mapped, &uboVS, sizeof(uboVS));
		uniformBufferVS.unmap();
	}

	void draw()
	{
		VulkanExampleBase::prepareFrame();
		
		// Check if we need to create buffers for new objects
		bool needsCommandBufferRebuild = false;
		for (auto& obj : sceneManager.objects) {
			if (obj.type == "Procedural" && !obj.buffersCreated && !obj.vertices.empty() && !obj.indices.empty()) {
				// Wait for GPU to finish current operations before creating new buffers
				vkDeviceWaitIdle(device);
				sceneManager.createBuffersForObject(obj);
				needsCommandBufferRebuild = true;
			}
		}
		
		// If new objects were added, ensure proper synchronization
		if (needsCommandBufferRebuild) {
			vkDeviceWaitIdle(device);
		}
		
		buildCommandBuffers();
		submitInfo.commandBufferCount = 1;
		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
		VulkanExampleBase::submitFrame();
	}

	void loadAssets()
	{
		const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
		// Models available in assets but not auto-loaded
		// models.models.loadFromFile(getAssetPath() + "models/MobulaBirostris.gltf", vulkanDevice, queue, glTFLoadingFlags);
		// models.background.loadFromFile(getAssetPath() + "models/PolarBear.gltf", vulkanDevice, queue, glTFLoadingFlags);
	}

	void prepareImGui()
	{
		imGui = new ImGUI(this);
		imGui->init((float)width, (float)height);
		imGui->initResources(renderPass, queue, getShadersPath(), swapChain.colorFormat, depthFormat);
	}

	void prepare()
	{
		VulkanExampleBase::prepare();
		
		// Get dynamic rendering function pointers
		vkCmdBeginRenderingKHR = reinterpret_cast<PFN_vkCmdBeginRenderingKHR>(vkGetDeviceProcAddr(device, "vkCmdBeginRenderingKHR"));
		vkCmdEndRenderingKHR = reinterpret_cast<PFN_vkCmdEndRenderingKHR>(vkGetDeviceProcAddr(device, "vkCmdEndRenderingKHR"));
		
		// Validate function pointers
		if (!vkCmdBeginRenderingKHR || !vkCmdEndRenderingKHR) {
			std::cout << "ERROR: Failed to load dynamic rendering function pointers" << std::endl;
			exit(1);
		}
		
		// Initialize scene manager with device pointer
		sceneManager.device = vulkanDevice;
		
		loadAssets();
		prepareUniformBuffers();
		setupLayoutsAndDescriptors();
		preparePipelines();
		setupProceduralDescriptorSet();
		prepareImGui();
		buildCommandBuffers();
		prepared = true;
	}

	virtual void render()
	{
		if (!prepared)
			return;

		updateUniformBuffers();

		// Update imGui
		ImGuiIO& io = ImGui::GetIO();

		io.DisplaySize = ImVec2((float)width, (float)height);
		io.DeltaTime = frameTimer;

		io.MousePos = ImVec2(mouseState.position.x, mouseState.position.y);
		io.MouseDown[0] = mouseState.buttons.left && ui.visible;
		io.MouseDown[1] = mouseState.buttons.right && ui.visible;
		io.MouseDown[2] = mouseState.buttons.middle && ui.visible;

		// Handle mouse wheel for camera zoom
		if (io.MouseWheel != 0.0f) {
			orbitCamera.ZoomImmediate(-io.MouseWheel * 10.0f, frameTimer);
		}

		draw();
	}


// Input handling is platform specific, to show how it's basically done this sample implements it for Windows
#if defined(_WIN32)
	virtual void OnHandleMessage(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
		ImGuiIO& io = ImGui::GetIO();
		
		// Handle mouse wheel for ImGui (needed for camera zoom)
		if (uMsg == WM_MOUSEWHEEL) {
			io.MouseWheel += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
		}
		
		// Only react to keyboard input if ImGui is active
		if (io.WantCaptureKeyboard) {
			// Character input
			if (uMsg == WM_CHAR) {
				if (wParam > 0 && wParam < 0x10000) {
					io.AddInputCharacter((unsigned short)wParam);
				}
			}
			// Special keys (tab, cursor, etc.)
			if ((wParam < 256) && (uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN)) {
				io.KeysDown[wParam] = true;
			}
			if ((wParam < 256) && (uMsg == WM_KEYUP || uMsg == WM_SYSKEYUP)) {
				io.KeysDown[wParam] = false;
			}
		}
	}
#endif

	// Override keyPressed for F key focus functionality
	virtual void keyPressed(uint32_t keyCode) override
	{
		// Handle F key for focus (immediate, no smoothing)
		if (keyCode == KEY_F) {
			if (sceneManager.hasSelection()) {
				// Focus on selected object immediately
				SceneObject* selectedObject = sceneManager.getSelectedObject();
				if (selectedObject) {
					glm::vec3 objectCenter = selectedObject->getBoundingBoxCenter();
					float objectRadius = selectedObject->getBoundingRadius();
					orbitCamera.SetFocusToSelectionImmediate(objectCenter, objectRadius);
					std::cout << "Focused camera on selected object: " << selectedObject->name << std::endl;
				}
			} else {
				// No selection, focus on scene center immediately
				orbitCamera.FrameAllImmediate(glm::vec3(0.0f, 0.0f, -5.0f), 3.0f);
				std::cout << "Focused camera on scene center (no selection)" << std::endl;
			}
		}
		
		
		// Call base implementation for other keys
		VulkanExampleBase::keyPressed(keyCode);
	}
	
	// Override mouseMoved for camera orbit/pan controls
	virtual void mouseMoved(double x, double y, bool &handled) override
	{
		ImGuiIO& io = ImGui::GetIO();
		
		// Calculate mouse delta
		double deltaX = x - lastMouseX;
		double deltaY = y - lastMouseY;
		lastMouseX = x;
		lastMouseY = y;
		
		// Handle industry-standard Maya/3ds Max style camera controls (Alt + mouse)
		// Use Windows API directly for Alt key detection since ImGui's KeyAlt is not reliable in this Vulkan framework
#if defined(_WIN32)
		bool altPressed = (GetAsyncKeyState(VK_MENU) & 0x8000) != 0;
#else
		bool altPressed = io.KeyAlt; // Fallback for non-Windows platforms
#endif
		
		// Alt key detection is now working properly using Windows GetAsyncKeyState API
		
		if (altPressed && mouseState.buttons.left) {
			// Alt + Left mouse: orbit around focus point
			if (std::abs(deltaX) > 0.1 || std::abs(deltaY) > 0.1) {
				orbitCamera.Orbit(deltaX * 0.5f, deltaY * 0.5f, frameTimer);
				handled = true;
			}
		} else if (altPressed && mouseState.buttons.middle) {
			// Alt + Middle mouse: pan viewport (immediate, no smoothing)
			if (std::abs(deltaX) > 0.1 || std::abs(deltaY) > 0.1) {
				orbitCamera.PanImmediate(-deltaX, deltaY, frameTimer);
				handled = true;
			}
		} else if (altPressed && mouseState.buttons.right) {
			// Alt + Right mouse: zoom (dolly camera)
			if (std::abs(deltaY) > 0.1) {
				orbitCamera.Zoom(deltaY * 0.01f, frameTimer);
				handled = true;
			}
		}
		
		// Call base implementation if not handled
		if (!handled) {
			VulkanExampleBase::mouseMoved(x, y, handled);
		}
	}

};

VULKAN_EXAMPLE_MAIN()