Moved example source files into sub folder

2017-11-12 19:32:09 +01:00 · 2017-11-12 19:32:09 +01:00 · 94a076e1ae
commit 94a076e1ae
parent a17e3924b3
69 changed files with 685 additions and 164 deletions
--- a/examples/tessellation/tessellation.cpp
+++ b/examples/tessellation/tessellation.cpp
@ -0,0 +1,574 @@
+/*
+* Vulkan Example - Tessellation shader PN triangles
+*
+* Based on http://alex.vlachos.com/graphics/CurvedPNTriangles.pdf
+* Shaders based on http://onrendering.blogspot.de/2011/12/tessellation-on-gpu-curved-pn-triangles.html
+*
+* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
+*
+* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <vector>
+
+#define GLM_FORCE_RADIANS
+#define GLM_FORCE_DEPTH_ZERO_TO_ONE
+#include <glm/glm.hpp>
+#include <glm/gtc/matrix_transform.hpp>
+
+#include <vulkan/vulkan.h>
+#include "vulkanexamplebase.h"
+#include "VulkanTexture.hpp"
+#include "VulkanModel.hpp"
+#include "VulkanBuffer.hpp"
+
+#define VERTEX_BUFFER_BIND_ID 0
+#define ENABLE_VALIDATION false
+
+class VulkanExample : public VulkanExampleBase
+{
+public:
+	bool splitScreen = true;
+	bool wireframe = true;
+
+	struct {
+		vks::Texture2D colorMap;
+	} textures;
+
+	struct {
+		VkPipelineVertexInputStateCreateInfo inputState;
+		std::vector<VkVertexInputBindingDescription> bindingDescriptions;
+		std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
+	} vertices;
+
+	// Vertex layout for the models
+	vks::VertexLayout vertexLayout = vks::VertexLayout({
+		vks::VERTEX_COMPONENT_POSITION,
+		vks::VERTEX_COMPONENT_NORMAL,
+		vks::VERTEX_COMPONENT_UV,
+	});
+
+	struct {
+		vks::Model object;
+	} models;
+
+	struct {
+		vks::Buffer tessControl, tessEval;
+	} uniformBuffers;
+	
+	struct UBOTessControl {
+		float tessLevel = 3.0f;
+	} uboTessControl;
+
+	struct UBOTessEval {
+		glm::mat4 projection;
+		glm::mat4 model;
+		float tessAlpha = 1.0f;
+	} uboTessEval;
+
+	struct Pipelines {
+		VkPipeline solid;
+		VkPipeline wire = VK_NULL_HANDLE;
+		VkPipeline solidPassThrough;
+		VkPipeline wirePassThrough = VK_NULL_HANDLE;
+	} pipelines;
+	VkPipeline *pipelineLeft = &pipelines.wirePassThrough;
+	VkPipeline *pipelineRight = &pipelines.wire;
+	
+	VkPipelineLayout pipelineLayout;
+	VkDescriptorSet descriptorSet;
+	VkDescriptorSetLayout descriptorSetLayout;
+
+	VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
+	{
+		zoom = -6.5f;
+		rotation = glm::vec3(-350.0f, 60.0f, 0.0f);
+		cameraPos = glm::vec3(-3.0f, 2.3f, 0.0f);
+		title = "Tessellation shader (PN Triangles)";
+		settings.overlay = true;
+	}
+
+	~VulkanExample()
+	{
+		// Clean up used Vulkan resources 
+		// Note : Inherited destructor cleans up resources stored in base class
+		vkDestroyPipeline(device, pipelines.solid, nullptr);
+		if (pipelines.wire != VK_NULL_HANDLE) {
+			vkDestroyPipeline(device, pipelines.wire, nullptr);
+		};
+		vkDestroyPipeline(device, pipelines.solidPassThrough, nullptr);
+		if (pipelines.wirePassThrough != VK_NULL_HANDLE) {
+			vkDestroyPipeline(device, pipelines.wirePassThrough, nullptr);
+		};
+
+		vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
+		vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
+
+		models.object.destroy();
+		uniformBuffers.tessControl.destroy();
+		uniformBuffers.tessEval.destroy();
+		textures.colorMap.destroy();
+	}
+
+	// Enable physical device features required for this example				
+	virtual void getEnabledFeatures()
+	{
+		// Example uses tessellation shaders
+		if (deviceFeatures.tessellationShader) {
+			enabledFeatures.tessellationShader = VK_TRUE;
+		}
+		else {
+			vks::tools::exitFatal("Selected GPU does not support tessellation shaders!", "Feature not supported");
+		}
+		// Fill mode non solid is required for wireframe display
+		if (deviceFeatures.fillModeNonSolid) {
+			enabledFeatures.fillModeNonSolid = VK_TRUE;
+		}
+		else {
+			wireframe = false;
+		}
+	}
+
+	void buildCommandBuffers()
+	{
+		VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
+
+		VkClearValue clearValues[2];
+		clearValues[0].color = { {0.5f, 0.5f, 0.5f, 0.0f} };
+		clearValues[1].depthStencil = { 1.0f, 0 };
+
+		VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
+		renderPassBeginInfo.renderPass = renderPass;
+		renderPassBeginInfo.renderArea.offset.x = 0;
+		renderPassBeginInfo.renderArea.offset.y = 0;
+		renderPassBeginInfo.renderArea.extent.width = width;
+		renderPassBeginInfo.renderArea.extent.height = height;
+		renderPassBeginInfo.clearValueCount = 2;
+		renderPassBeginInfo.pClearValues = clearValues;
+
+		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
+		{
+			// Set target frame buffer
+			renderPassBeginInfo.framebuffer = frameBuffers[i];
+
+			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
+
+			vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
+
+			VkViewport viewport = vks::initializers::viewport(splitScreen ? (float)width / 2.0f : (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);
+
+			vkCmdSetLineWidth(drawCmdBuffers[i], 1.0f);
+
+			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
+
+			VkDeviceSize offsets[1] = { 0 };
+			vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &models.object.vertices.buffer, offsets);
+			vkCmdBindIndexBuffer(drawCmdBuffers[i], models.object.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
+
+			if (splitScreen) {
+				vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
+				vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, wireframe ? pipelines.wirePassThrough : pipelines.solidPassThrough);
+				vkCmdDrawIndexed(drawCmdBuffers[i], models.object.indexCount, 1, 0, 0, 0);
+				viewport.x = float(width) / 2;
+			}
+
+			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
+			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, wireframe ? pipelines.wire : pipelines.solid);
+			vkCmdDrawIndexed(drawCmdBuffers[i], models.object.indexCount, 1, 0, 0, 0);
+
+			vkCmdEndRenderPass(drawCmdBuffers[i]);
+
+			VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
+		}
+	}
+
+	void loadAssets()
+	{
+		models.object.loadFromFile(getAssetPath() + "models/lowpoly/deer.dae", vertexLayout, 1.0f, vulkanDevice, queue);
+		if (deviceFeatures.textureCompressionBC) {
+			textures.colorMap.loadFromFile(getAssetPath() + "textures/deer_bc3_unorm.ktx", VK_FORMAT_BC3_UNORM_BLOCK, vulkanDevice, queue);
+		}
+		else if (deviceFeatures.textureCompressionASTC_LDR) {
+			textures.colorMap.loadFromFile(getAssetPath() + "textures/deer_astc_8x8_unorm.ktx", VK_FORMAT_ASTC_8x8_UNORM_BLOCK, vulkanDevice, queue);
+		}
+		else if (deviceFeatures.textureCompressionETC2) {
+			textures.colorMap.loadFromFile(getAssetPath() + "textures/deer_etc2_unorm.ktx", VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK, vulkanDevice, queue);
+		}
+		else {
+			vks::tools::exitFatal("Device does not support any compressed texture format!", "Error");
+		}
+	}
+
+	void setupVertexDescriptions()
+	{
+		// Binding description
+		vertices.bindingDescriptions.resize(1);
+		vertices.bindingDescriptions[0] =
+			vks::initializers::vertexInputBindingDescription(
+				VERTEX_BUFFER_BIND_ID,
+				vertexLayout.stride(),
+				VK_VERTEX_INPUT_RATE_VERTEX);
+
+		// Attribute descriptions
+		// Describes memory layout and shader positions
+		vertices.attributeDescriptions.resize(3);
+
+		// Location 0 : Position
+		vertices.attributeDescriptions[0] =
+			vks::initializers::vertexInputAttributeDescription(
+				VERTEX_BUFFER_BIND_ID,
+				0,
+				VK_FORMAT_R32G32B32_SFLOAT,
+				0);
+
+		// Location 1 : Normals
+		vertices.attributeDescriptions[1] =
+			vks::initializers::vertexInputAttributeDescription(
+				VERTEX_BUFFER_BIND_ID,
+				1,
+				VK_FORMAT_R32G32B32_SFLOAT,
+				sizeof(float) * 3);
+
+		// Location 2 : Texture coordinates
+		vertices.attributeDescriptions[2] =
+			vks::initializers::vertexInputAttributeDescription(
+				VERTEX_BUFFER_BIND_ID,
+				2,
+				VK_FORMAT_R32G32_SFLOAT,
+				sizeof(float) * 6);
+
+		vertices.inputState = vks::initializers::pipelineVertexInputStateCreateInfo();
+		vertices.inputState.vertexBindingDescriptionCount = vertices.bindingDescriptions.size();
+		vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
+		vertices.inputState.vertexAttributeDescriptionCount = vertices.attributeDescriptions.size();
+		vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
+	}
+
+	void setupDescriptorPool()
+	{
+		// Example uses two ubos and one combined image sampler
+		std::vector<VkDescriptorPoolSize> poolSizes =
+		{
+			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 2),
+			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1),
+		};
+
+		VkDescriptorPoolCreateInfo descriptorPoolInfo =
+			vks::initializers::descriptorPoolCreateInfo(
+				poolSizes.size(),
+				poolSizes.data(),
+				1);
+
+		VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
+	}
+
+	void setupDescriptorSetLayout()
+	{
+		std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
+		{
+			// Binding 0 : Tessellation control shader ubo
+			vks::initializers::descriptorSetLayoutBinding(
+				VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
+				VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT,
+				0),
+			// Binding 1 : Tessellation evaluation shader ubo
+			vks::initializers::descriptorSetLayoutBinding(
+				VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
+				VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT,
+				1),
+			// Binding 2 : Fragment shader combined sampler
+			vks::initializers::descriptorSetLayoutBinding(
+				VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
+				VK_SHADER_STAGE_FRAGMENT_BIT,
+				2),
+		};
+
+		VkDescriptorSetLayoutCreateInfo descriptorLayout =
+			vks::initializers::descriptorSetLayoutCreateInfo(
+				setLayoutBindings.data(),
+				setLayoutBindings.size());
+
+		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
+
+		VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
+			vks::initializers::pipelineLayoutCreateInfo(
+				&descriptorSetLayout,
+				1);
+
+		VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
+	}
+
+	void setupDescriptorSet()
+	{
+		VkDescriptorSetAllocateInfo allocInfo =
+			vks::initializers::descriptorSetAllocateInfo(
+				descriptorPool,
+				&descriptorSetLayout,
+				1);
+
+		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
+
+		VkDescriptorImageInfo texDescriptor =
+			vks::initializers::descriptorImageInfo(
+				textures.colorMap.sampler,
+				textures.colorMap.view,
+				VK_IMAGE_LAYOUT_GENERAL);
+
+		std::vector<VkWriteDescriptorSet> writeDescriptorSets =
+		{
+			// Binding 0 : Tessellation control shader ubo
+			vks::initializers::writeDescriptorSet(
+			descriptorSet,
+				VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
+				0,
+				&uniformBuffers.tessControl.descriptor),
+			// Binding 1 : Tessellation evaluation shader ubo
+			vks::initializers::writeDescriptorSet(
+				descriptorSet,
+				VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
+				1,
+				&uniformBuffers.tessEval.descriptor),
+			// Binding 2 : Color map 
+			vks::initializers::writeDescriptorSet(
+				descriptorSet,
+				VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
+				2,
+				&texDescriptor)
+		};
+
+		vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, NULL);
+	}
+
+	void preparePipelines()
+	{
+		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
+			vks::initializers::pipelineInputAssemblyStateCreateInfo(
+				VK_PRIMITIVE_TOPOLOGY_PATCH_LIST,
+				0,
+				VK_FALSE);
+
+		VkPipelineRasterizationStateCreateInfo rasterizationState =
+			vks::initializers::pipelineRasterizationStateCreateInfo(
+				VK_POLYGON_MODE_FILL,
+				VK_CULL_MODE_BACK_BIT,
+				VK_FRONT_FACE_COUNTER_CLOCKWISE,
+				0);
+
+		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,
+				0);
+
+		std::vector<VkDynamicState> dynamicStateEnables = {
+			VK_DYNAMIC_STATE_VIEWPORT,
+			VK_DYNAMIC_STATE_SCISSOR,
+			VK_DYNAMIC_STATE_LINE_WIDTH
+		};
+		VkPipelineDynamicStateCreateInfo dynamicState =
+			vks::initializers::pipelineDynamicStateCreateInfo(
+				dynamicStateEnables.data(),
+				dynamicStateEnables.size(),
+				0);
+
+		VkPipelineTessellationStateCreateInfo tessellationState =
+			vks::initializers::pipelineTessellationStateCreateInfo(3);
+
+		// Tessellation pipelines
+		// Load shaders
+		std::array<VkPipelineShaderStageCreateInfo, 4> shaderStages;
+
+		shaderStages[0] = loadShader(getAssetPath() + "shaders/tessellation/base.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
+		shaderStages[1] = loadShader(getAssetPath() + "shaders/tessellation/base.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
+		shaderStages[2] = loadShader(getAssetPath() + "shaders/tessellation/pntriangles.tesc.spv", VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT);
+		shaderStages[3] = loadShader(getAssetPath() + "shaders/tessellation/pntriangles.tese.spv", VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT);
+
+		VkGraphicsPipelineCreateInfo pipelineCreateInfo =
+			vks::initializers::pipelineCreateInfo(
+				pipelineLayout,
+				renderPass,
+				0);
+
+		pipelineCreateInfo.pVertexInputState = &vertices.inputState;
+		pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
+		pipelineCreateInfo.pRasterizationState = &rasterizationState;
+		pipelineCreateInfo.pColorBlendState = &colorBlendState;
+		pipelineCreateInfo.pMultisampleState = &multisampleState;
+		pipelineCreateInfo.pViewportState = &viewportState;
+		pipelineCreateInfo.pDepthStencilState = &depthStencilState;
+		pipelineCreateInfo.pDynamicState = &dynamicState;
+		pipelineCreateInfo.pTessellationState = &tessellationState;
+		pipelineCreateInfo.stageCount = shaderStages.size();
+		pipelineCreateInfo.pStages = shaderStages.data();
+		pipelineCreateInfo.renderPass = renderPass;
+
+		// Tessellation pipelines
+		// Solid
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.solid));
+		// Wireframe
+		if (deviceFeatures.fillModeNonSolid) {
+			rasterizationState.polygonMode = VK_POLYGON_MODE_LINE;
+			VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.wire));
+		}
+
+		// Pass through pipelines
+		// Load pass through tessellation shaders (Vert and frag are reused)
+		shaderStages[2] = loadShader(getAssetPath() + "shaders/tessellation/passthrough.tesc.spv", VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT);
+		shaderStages[3] = loadShader(getAssetPath() + "shaders/tessellation/passthrough.tese.spv", VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT);
+
+		// Solid
+		rasterizationState.polygonMode = VK_POLYGON_MODE_FILL;
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.solidPassThrough));
+		// Wireframe
+		if (deviceFeatures.fillModeNonSolid) {
+			rasterizationState.polygonMode = VK_POLYGON_MODE_LINE;
+			VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.wirePassThrough));
+		}
+	}
+
+	// Prepare and initialize uniform buffer containing shader uniforms
+	void prepareUniformBuffers()
+	{
+		// Tessellation evaluation shader uniform buffer
+		VK_CHECK_RESULT(vulkanDevice->createBuffer(
+			VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
+			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
+			&uniformBuffers.tessEval,
+			sizeof(uboTessEval)));
+
+		// Tessellation control shader uniform buffer
+		VK_CHECK_RESULT(vulkanDevice->createBuffer(
+			VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
+			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
+			&uniformBuffers.tessControl,
+			sizeof(uboTessControl)));
+
+		// Map persistent
+		VK_CHECK_RESULT(uniformBuffers.tessControl.map());
+		VK_CHECK_RESULT(uniformBuffers.tessEval.map());
+
+		updateUniformBuffers();
+	}
+
+	void updateUniformBuffers()
+	{
+		// Tessellation eval
+		glm::mat4 viewMatrix = glm::mat4(1.0f);
+		uboTessEval.projection = glm::perspective(glm::radians(45.0f), (float)(width* ((splitScreen) ? 0.5f : 1.0f)) / (float)height, 0.1f, 256.0f);
+		viewMatrix = glm::translate(viewMatrix, glm::vec3(0.0f, 0.0f, zoom));
+
+		uboTessEval.model = glm::mat4(1.0f);
+		uboTessEval.model = viewMatrix * glm::translate(uboTessEval.model, cameraPos);
+		uboTessEval.model = glm::rotate(uboTessEval.model, glm::radians(rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
+		uboTessEval.model = glm::rotate(uboTessEval.model, glm::radians(rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
+		uboTessEval.model = glm::rotate(uboTessEval.model, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
+
+		// Tessellation evaulation uniform block
+		memcpy(uniformBuffers.tessEval.mapped, &uboTessEval, sizeof(uboTessEval));
+
+		// Tessellation control uniform block
+		memcpy(uniformBuffers.tessControl.mapped, &uboTessControl, sizeof(uboTessControl));
+	}
+
+	void draw()
+	{
+		VulkanExampleBase::prepareFrame();
+
+		submitInfo.commandBufferCount = 1;
+		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
+		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
+
+		VulkanExampleBase::submitFrame();
+	}
+
+	void prepare()
+	{
+		VulkanExampleBase::prepare();
+		loadAssets();
+		setupVertexDescriptions();
+		prepareUniformBuffers();
+		setupDescriptorSetLayout();
+		preparePipelines();
+		setupDescriptorPool();
+		setupDescriptorSet();
+		buildCommandBuffers(); 
+		prepared = true;
+	}
+
+	virtual void render()
+	{
+		if (!prepared)
+			return;
+		vkDeviceWaitIdle(device);
+		draw();
+		vkDeviceWaitIdle(device);
+	}
+
+	virtual void viewChanged()
+	{
+		updateUniformBuffers();
+	}
+
+	void togglePipelines()
+	{
+		if (pipelineRight == &pipelines.solid)
+		{
+			pipelineRight = &pipelines.wire;
+			pipelineLeft = &pipelines.wirePassThrough;
+		}
+		else
+		{
+			pipelineRight = &pipelines.solid;
+			pipelineLeft = &pipelines.solidPassThrough;
+		}
+		buildCommandBuffers();
+	}
+
+
+	virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
+	{
+		if (overlay->header("Settings")) {
+			if (overlay->inputFloat("Tessellation level", &uboTessControl.tessLevel, 0.25f, 2)) {
+				updateUniformBuffers();
+			}
+			if (deviceFeatures.fillModeNonSolid) {
+				if (overlay->checkBox("Wireframe", &wireframe)) {
+					updateUniformBuffers();
+					buildCommandBuffers();
+				}
+				if (overlay->checkBox("Splitscreen", &splitScreen)) {
+					updateUniformBuffers();
+					buildCommandBuffers();
+				}
+			}
+		}
+	}
+};
+
+VULKAN_EXAMPLE_MAIN()