Merge branch 'master' into imgui_162

.travis.yml

@@ -1,7 +1,25 @@
-language: cpp
+language: gneric
 sudo: required
 os: linux
 dist: trusty
+matrix:
+  include:
+    - os: linux
+      env: COMPILER_NAME=gcc CXX=g++-7 CC=gcc-7
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+    - os: linux
+      env: COMPILER_NAME=clang CXX=clang++-5.0 CC=clang-5.0
+      addons:
+        apt:
+          packages:
+            - clang-5.0
+          sources:
+            - llvm-toolchain-trusty-5.0
 compiler:
   - clang
   - gcc

CMakeLists.txt

@@ -11,6 +11,7 @@ include_directories(external/glm)
 include_directories(external/gli)
 include_directories(external/assimp)
 include_directories(external/imgui)
+include_directories(external/tinygltf)
 include_directories(base)
 
 OPTION(USE_D2D_WSI "Build the project using Direct to Display swapchain" OFF)

data/shaders/conditionalrender/model.vert

@@ -4,16 +4,19 @@ layout (location = 0) in vec3 inPos;
 layout (location = 1) in vec3 inNormal;
 layout (location = 2) in vec3 inColor;
 
-layout (set = 0, binding = 0) uniform UBO 
-{
+layout (set = 0, binding = 0) uniform UBO {
 	mat4 projection;
+	mat4 view;
 	mat4 model;
 } ubo;
 
+layout (set = 1, binding = 0) uniform Node {
+	mat4 matrix;
+} node;
+
 layout(push_constant) uniform PushBlock {
-	vec4 offset;
-	vec4 color;
-} pushBlock;
+	vec4 baseColorFactor;
+} material;
 
 layout (location = 0) out vec3 outNormal;
 layout (location = 1) out vec3 outColor;
@@ -28,14 +31,14 @@ out gl_PerVertex
 void main() 
 {
 	outNormal = inNormal;
-	outColor = inColor * pushBlock.color.rgb;
-	vec4 pos = vec4(inPos + pushBlock.offset.xyz, 1.0);
-	gl_Position = ubo.projection * ubo.model * pos;
+	outColor = material.baseColorFactor.rgb;
+	vec4 pos = vec4(inPos, 1.0);
+	gl_Position = ubo.projection * ubo.view * ubo.model * node.matrix * pos;
 
-	outNormal = mat3(ubo.model) * inNormal;
+	outNormal = mat3(ubo.view * ubo.model * node.matrix) * inNormal;
 
-	vec4 localpos = ubo.model * pos;
-	vec3 lightPos = vec3(1.0f, -1.0f, 1.0f);
+	vec4 localpos = ubo.view * ubo.model * node.matrix * pos;
+	vec3 lightPos = vec3(10.0f, -10.0f, 10.0f);
 	outLightVec = lightPos.xyz - localpos.xyz;
 	outViewVec = -localpos.xyz;		
 }

examples/CMakeLists.txt

@@ -47,6 +47,7 @@ set(EXAMPLES
 	computenbody
 	computeparticles
 	computeshader
+	conditionalrender
 	conservativeraster
 	debugmarker
 	deferred

examples/conditionalrender/conditionalrender.cpp

@@ -3,8 +3,8 @@
 *
 * Note: Requires a device that supports the VK_EXT_conditional_rendering extension
 *
-* With conditional rendering it's possible to execute certain rendering commands based
-* on a buffer value instead of having to rebuild the command buffers.
+* With conditional rendering it's possible to execute certain rendering commands based on a buffer value instead of having to rebuild the command buffers.
+* This example sets up a conditonal buffer with one value per glTF part, that is used to toggle visibility of single model parts.
 *
 * Copyright (C) 2018 by Sascha Willems - www.saschawillems.de
 *
@@ -24,35 +24,27 @@
 
 #include <vulkan/vulkan.h>
 #include "vulkanexamplebase.h"
-#include "VulkanModel.hpp"
+#include "VulkanglTFModel.hpp"
 
 #define ENABLE_VALIDATION false
-#define MODEL_ROWS 3
 
 class VulkanExample : public VulkanExampleBase
 {
 public:
 	PFN_vkCmdBeginConditionalRenderingEXT vkCmdBeginConditionalRenderingEXT;
 	PFN_vkCmdEndConditionalRenderingEXT vkCmdEndConditionalRenderingEXT;
-	VkPhysicalDeviceConditionalRenderingFeaturesEXT conditionalRenderingFeatures{};
 
-	// Vertex layout for the models
-	vks::VertexLayout vertexLayout = vks::VertexLayout({
-		vks::VERTEX_COMPONENT_POSITION,
-		vks::VERTEX_COMPONENT_NORMAL,
-		vks::VERTEX_COMPONENT_COLOR,
-	});
-
-	vks::Model model;
+	vkglTF::Model scene;
 
 	struct {
 		glm::mat4 projection;
-		glm::mat4 modelview;
+		glm::mat4 view;
+		glm::mat4 model;
 	} uboVS;
 
 	vks::Buffer uniformBuffer;
 
-	std::array<int32_t, MODEL_ROWS> conditionalVisibility{};
+	std::vector<int32_t> conditionalVisibility;
 	vks::Buffer conditionalBuffer;
 
 	VkPipelineLayout pipelineLayout;
@@ -65,47 +57,75 @@ public:
 		title = "Conditional rendering";
 		settings.overlay = true;
 		camera.type = Camera::CameraType::lookat;
-		camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 512.0f);
-		camera.setRotation(glm::vec3(0.0f, 0.0f, 0.0f));
-		camera.setTranslation(glm::vec3(0.0f, 0.0f, -15.0f));
-		rotationSpeed *= 0.25f;
+		camera.setPerspective(45.0f, (float)width / (float)height, 0.1f, 512.0f);
+		camera.setRotation(glm::vec3(-2.25f, -52.0f, 0.0f));
+		camera.setTranslation(glm::vec3(1.9f, -2.05f, -18.0f));
+		camera.rotationSpeed *= 0.25f;
 
-		// Enable extension required for conditional rendering
+		/*
+			[POI] Enable extension required for conditional rendering
+		*/
 		enabledDeviceExtensions.push_back(VK_EXT_CONDITIONAL_RENDERING_EXTENSION_NAME);
-		// Enable extension required to get conditional rendering supported features
-		enabledInstanceExtensions.push_back(VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME);
 	}
 
 	~VulkanExample()
 	{
-		// Clean up used Vulkan resources 
-		// Note : Inherited destructor cleans up resources stored in base class
 		vkDestroyPipeline(device, pipeline, nullptr);
 		vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
 		vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
-		model.destroy();
 		uniformBuffer.destroy();
 		conditionalBuffer.destroy();
 	}
 
-	// Enable physical device features required for this example				
-	virtual void getEnabledFeatures()
-	{
-		// Geometry shader support is required for this example
-		if (deviceFeatures.geometryShader) {
-			enabledFeatures.geometryShader = VK_TRUE;
-		}
-		else {
-			vks::tools::exitFatal("Selected GPU does not support geometry shaders!", VK_ERROR_FEATURE_NOT_PRESENT);
+	void renderNode(vkglTF::Node *node, VkCommandBuffer commandBuffer) {
+		if (node->mesh) {
+			for (vkglTF::Primitive * primitive : node->mesh->primitives) {
+				const std::vector<VkDescriptorSet> descriptorsets = {
+					descriptorSet,
+					node->mesh->uniformBuffer.descriptorSet
+				};
+				vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, static_cast<uint32_t>(descriptorsets.size()), descriptorsets.data(), 0, NULL);
+				
+				struct PushBlock {
+					glm::vec4 baseColorFactor;
+				} pushBlock;
+				pushBlock.baseColorFactor = primitive->material.baseColorFactor;
+
+				vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushBlock), &pushBlock);
+
+				/*
+					[POI] Setup the conditional rendering
+				*/
+				VkConditionalRenderingBeginInfoEXT conditionalRenderingBeginInfo{};
+				conditionalRenderingBeginInfo.sType = VK_STRUCTURE_TYPE_CONDITIONAL_RENDERING_BEGIN_INFO_EXT;
+				conditionalRenderingBeginInfo.buffer = conditionalBuffer.buffer;
+				conditionalRenderingBeginInfo.offset = sizeof(int32_t) * node->index;
+
+				/*
+					[POI] Begin conditionally rendered section
+
+					If the value from the conditional rendering buffer at the given offset is != 0, the draw commands will be executed
+				*/
+				vkCmdBeginConditionalRenderingEXT(commandBuffer, &conditionalRenderingBeginInfo);
+
+				vkCmdDrawIndexed(commandBuffer, primitive->indexCount, 1, primitive->firstIndex, 0, 0);
+
+				vkCmdEndConditionalRenderingEXT(commandBuffer);
+			}
+
+		};
+		for (auto child : node->children) {
+			renderNode(child, commandBuffer);
 		}
 	}
 
+
 	void buildCommandBuffers()
 	{
 		VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
 
 		VkClearValue clearValues[2];
-		clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 0.0f } };
+		clearValues[0].color = { { 1.0f, 1.0f, 1.0f, 1.0f } };
 		clearValues[1].depthStencil = { 1.0f, 0 };
 
 		VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
@@ -117,9 +137,7 @@ public:
 		renderPassBeginInfo.clearValueCount = 2;
 		renderPassBeginInfo.pClearValues = clearValues;
 
-		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
-		{
-			// Set target frame buffer
+		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i) {
 			renderPassBeginInfo.framebuffer = frameBuffers[i];
 
 			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
@@ -133,49 +151,13 @@ public:
 
 			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
 
-			VkDeviceSize offsets[1] = { 0 };
-			vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, &model.vertices.buffer, offsets);
-			vkCmdBindIndexBuffer(drawCmdBuffers[i], model.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
-
-			struct PushBlock {
-				glm::vec4 offset;
-				glm::vec4 color;
-			} pushBlock;
-
-			const std::array<glm::vec3, 3> colors = {
-				glm::vec3(1.0f, 0.0f, 0.0f),
-				glm::vec3(0.0f, 1.0f, 0.0f),
-				glm::vec3(0.0f, 0.0f, 1.0f),
-			};
-
-			/*
-				[POI] Setup the conditional rendering structure that decides on wether the commands are rendered or discarded
-			*/
-			VkConditionalRenderingBeginInfoEXT conditionalRenderingBeginInfo{};
-			conditionalRenderingBeginInfo.sType = VK_STRUCTURE_TYPE_CONDITIONAL_RENDERING_BEGIN_INFO_EXT;
-			// If the value in this buffer at the given offset is zero, commands are discadrd
-			conditionalRenderingBeginInfo.buffer = conditionalBuffer.buffer;
-			// Offset will be changed in the loop below to toggle visibility of whole rows
-			conditionalRenderingBeginInfo.offset = 0;
-
 			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
-			for (int32_t x = -1; x < MODEL_ROWS - 1; x++) {
-				for (int32_t y = -2; y < 3; y++) {
-					pushBlock.offset = glm::vec4((float)x * 3.0f, (float)y * 2.5f, 0.0f, 1.0f);
-					pushBlock.color = glm::vec4(colors[x+1], 1.0f);
-
-					/*
-						[POI] Start the conditionally rendered part (for this row)
-					*/
-
-					conditionalRenderingBeginInfo.offset = sizeof(uint32_t) * (x + 1);
-					vkCmdBeginConditionalRenderingEXT(drawCmdBuffers[i], &conditionalRenderingBeginInfo);
-
-					vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(pushBlock), &pushBlock);
-					vkCmdDrawIndexed(drawCmdBuffers[i], model.indexCount, 1, 0, 0, 0);
-
-					vkCmdEndConditionalRenderingEXT(drawCmdBuffers[i]);
-				}
+				
+			const VkDeviceSize offsets[1] = { 0 };
+			vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, &scene.vertices.buffer, offsets);
+			vkCmdBindIndexBuffer(drawCmdBuffers[i], scene.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
+			for (auto node : scene.nodes) {
+				renderNode(node, drawCmdBuffers[i]);
 			}
 
 			vkCmdEndRenderPass(drawCmdBuffers[i]);
@@ -186,7 +168,7 @@ public:
 
 	void loadAssets()
 	{
-		model.loadFromFile(getAssetPath() + "models/suzanne.obj", vertexLayout, 0.1f, vulkanDevice, queue);
+		scene.loadFromFile(getAssetPath() + "models/gltf/glTF-Embedded/Buggy.gltf", vulkanDevice, queue);
 	}
 
 	void setupDescriptorSets()
@@ -206,7 +188,10 @@ public:
 		descriptorLayoutCI.pBindings = setLayoutBindings.data();
 		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayoutCI, nullptr, &descriptorSetLayout));
 
-		VkPipelineLayoutCreateInfo pipelineLayoutCI = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
+		std::array<VkDescriptorSetLayout, 2> setLayouts = {
+			descriptorSetLayout, scene.descriptorSetLayout
+		};
+		VkPipelineLayoutCreateInfo pipelineLayoutCI = vks::initializers::pipelineLayoutCreateInfo(setLayouts.data(), 2);
 		VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(glm::vec4) * 2,	0);
 		pipelineLayoutCI.pushConstantRangeCount = 1;
 		pipelineLayoutCI.pPushConstantRanges = &pushConstantRange;
@@ -225,7 +210,7 @@ public:
 		const std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
 
 		VkPipelineInputAssemblyStateCreateInfo inputAssemblyStateCI = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
-		VkPipelineRasterizationStateCreateInfo rasterizationStateCI = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_CLOCKWISE, 0);
+		VkPipelineRasterizationStateCreateInfo rasterizationStateCI = 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 colorBlendStateCI = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
 		VkPipelineDepthStencilStateCreateInfo depthStencilStateCI = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
@@ -235,12 +220,12 @@ public:
 
 		// Vertex bindings and attributes
 		const std::vector<VkVertexInputBindingDescription> vertexInputBindings = {
-			vks::initializers::vertexInputBindingDescription(0, vertexLayout.stride(), VK_VERTEX_INPUT_RATE_VERTEX),
+			vks::initializers::vertexInputBindingDescription(0, sizeof(vkglTF::Model::Vertex), VK_VERTEX_INPUT_RATE_VERTEX),
 		};
 		const std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
 			vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0),					// Location 0: Position			
 			vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 3),	// Location 1: Normal
-			vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 6),	// Location 3: Color
+			vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32G32_SFLOAT, sizeof(float) * 6),		// Location 2: UV
 		};
 		VkPipelineVertexInputStateCreateInfo vertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
 		vertexInputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertexInputBindings.size());
@@ -283,41 +268,26 @@ public:
 	void updateUniformBuffers()
 	{
 		uboVS.projection = camera.matrices.perspective;
-		uboVS.modelview = camera.matrices.view;
+		uboVS.view = glm::scale(camera.matrices.view, glm::vec3(0.1f , -0.1f, 0.1f));
+		uboVS.model = glm::translate(glm::mat4(1.0f), scene.dimensions.min);
 		memcpy(uniformBuffer.mapped, &uboVS, sizeof(uboVS));
 	}
 
 	void updateConditionalBuffer()
 	{
-		memcpy(conditionalBuffer.mapped, &conditionalVisibility, sizeof(conditionalVisibility));
+		memcpy(conditionalBuffer.mapped, conditionalVisibility.data(), sizeof(int32_t) * conditionalVisibility.size());
 	}
 
-	void draw()
+	/*
+		[POI] Extension specific setup
+
+		Gets the function pointers required for conditonal rendering
+		Sets up a dedicated conditional buffer that is used to determine visibility at draw time
+	*/
+	void prepareConditionalRendering()
 	{
-		VulkanExampleBase::prepareFrame();
-
-		// Command buffer to be sumitted to the queue
-		submitInfo.commandBufferCount = 1;
-		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
-
-		// Submit to queue
-		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
-
-		VulkanExampleBase::submitFrame();
-	}
-
-	void prepare()
-	{
-		VulkanExampleBase::prepare();
-
 		/*
-			Extension specific functions
-		*/
-
-		/*
-			Get the function pointer
-			
-			The conditional rendering functions are part of an extension so they have to be manually loaded 
+			The conditional rendering functions are part of an extension so they have to be loaded manually
 		*/
 		vkCmdBeginConditionalRenderingEXT = (PFN_vkCmdBeginConditionalRenderingEXT)vkGetDeviceProcAddr(device, "vkCmdBeginConditionalRenderingEXT");
 		if (!vkCmdBeginConditionalRenderingEXT) {
@@ -329,45 +299,46 @@ public:
 			vks::tools::exitFatal("Could not get a valid function pointer for vkCmdEndConditionalRenderingEXT", -1);
 		}
 
-		/*
-			Get conditional rendering features
-		*/
-		PFN_vkGetPhysicalDeviceFeatures2KHR vkGetPhysicalDeviceFeatures2KHR = reinterpret_cast<PFN_vkGetPhysicalDeviceFeatures2KHR>(vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceFeatures2KHR"));
-		if (!vkGetPhysicalDeviceFeatures2KHR) {
-			vks::tools::exitFatal("Could not get a valid function pointer for vkGetPhysicalDeviceFeatures2KHR", -1);
-		}
-		VkPhysicalDeviceFeatures2KHR deviceFeatures2{};
-		conditionalRenderingFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CONDITIONAL_RENDERING_FEATURES_EXT;
-		deviceFeatures2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2_KHR;
-		deviceFeatures2.pNext = &conditionalRenderingFeatures;
-		vkGetPhysicalDeviceFeatures2KHR(physicalDevice, &deviceFeatures2);
-
 		/*
 			Create the buffer that contains the conditional rendering information
-			
+
 			A single conditional value is 32 bits and if it's zero the rendering commands are discarded
 			This sample renders multiple rows of objects conditionally, so we setup a buffer with one value per row
 		*/
+		conditionalVisibility.resize(scene.linearNodes.size());
 		VK_CHECK_RESULT(vulkanDevice->createBuffer(
 			VK_BUFFER_USAGE_CONDITIONAL_RENDERING_BIT_EXT,
 			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
 			&conditionalBuffer,
-			sizeof(uint32_t) * MODEL_ROWS));
+			sizeof(int32_t) *conditionalVisibility.size(),
+			conditionalVisibility.data()));
+		VK_CHECK_RESULT(conditionalBuffer.map());
+
+		// By default, all parts of the glTF are visible
+		for (auto i = 0; i < conditionalVisibility.size(); i++) {
+			conditionalVisibility[i] = 1;
+		}
 
 		/*
 			Copy visibility data
 		*/
-		for (auto i = 0; i < conditionalVisibility.size(); i++) {
-			conditionalVisibility[i] = 1;
-		}
-		VK_CHECK_RESULT(conditionalBuffer.map());
-		memcpy(conditionalBuffer.mapped, &conditionalVisibility, sizeof(conditionalVisibility));
+		updateConditionalBuffer();
+	}
 
-		/*
-			End of extension specific functions
-		*/
+	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();
+		prepareConditionalRendering();
 		prepareUniformBuffers();
 		setupDescriptorSets();
 		preparePipelines();
@@ -380,28 +351,42 @@ public:
 		if (!prepared)
 			return;
 		draw();
-	}
-
-	virtual void viewChanged()
-	{
-		updateUniformBuffers();
+		if (camera.updated) {
+			updateUniformBuffers();
+		}
 	}
 
 	virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
 	{
 		if (overlay->header("Visibility")) {
-			for (uint32_t i = 0; i < MODEL_ROWS; i++) {
-				if (overlay->checkBox(std::to_string(i).c_str(), &conditionalVisibility[i])) {
-					updateConditionalBuffer();
-				};
-				if (i < MODEL_ROWS - 1) { ImGui::SameLine(); };
-			}
-		}
-		if (overlay->header("Device properties")) {
-			overlay->text("conditional rendering: %s", conditionalRenderingFeatures.conditionalRendering ? "true" : "false");
-			overlay->text("inherited conditional rendering: %s", conditionalRenderingFeatures.inheritedConditionalRendering ? "true" : "false");
-		}
 
+			if (overlay->button("All")) {
+				for (auto i = 0; i < conditionalVisibility.size(); i++) {
+					conditionalVisibility[i] = 1;
+				}
+				updateConditionalBuffer();
+			}
+			ImGui::SameLine();
+			if (overlay->button("None")) {
+				for (auto i = 0; i < conditionalVisibility.size(); i++) {
+					conditionalVisibility[i] = 0;
+				}
+				updateConditionalBuffer();
+			}
+			ImGui::NewLine();
+
+			ImGui::BeginChild("InnerRegion", ImVec2(200.0f, 400.0f), false);
+			for (auto node : scene.linearNodes) {
+				// Add visibility toggle checkboxes for all model nodes with a mesh
+				if (node->mesh) {
+					if (overlay->checkBox(("[" + std::to_string(node->index) + "] " + node->mesh->name).c_str(), &conditionalVisibility[node->index])) {
+						updateConditionalBuffer();
+					}
+				}
+			}
+			ImGui::EndChild();
+
+		}
 	}
 
 };

examples/offscreen/offscreen.cpp

@@ -53,12 +53,6 @@ public:
 		vks::Model plane;
 	} models;
 
-	struct {
-		VkPipelineVertexInputStateCreateInfo inputState;
-		std::vector<VkVertexInputBindingDescription> bindingDescriptions;
-		std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
-	} vertices;
-
 	struct {
 		vks::Buffer vsShared;
 		vks::Buffer vsMirror;
@@ -442,7 +436,6 @@ public:
 			}
 
 			// Scene
-			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.debug);
 
 			// Reflection plane
 			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.textured, 0, 1, &descriptorSets.mirror, 0, NULL);
@@ -531,54 +524,6 @@ public:
 		models.quad.device = device;
 	}
 
-	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
-		vertices.attributeDescriptions.resize(4);
-		// Location 0 : Position
-		vertices.attributeDescriptions[0] =
-			vks::initializers::vertexInputAttributeDescription(
-				VERTEX_BUFFER_BIND_ID,
-				0,
-				VK_FORMAT_R32G32B32_SFLOAT,
-				0);
-		// Location 1 : Texture coordinates
-		vertices.attributeDescriptions[1] =
-			vks::initializers::vertexInputAttributeDescription(
-				VERTEX_BUFFER_BIND_ID,
-				1,
-				VK_FORMAT_R32G32_SFLOAT,
-				sizeof(float) * 3);
-		// Location 2 : Color
-		vertices.attributeDescriptions[2] =
-			vks::initializers::vertexInputAttributeDescription(
-				VERTEX_BUFFER_BIND_ID,
-				2,
-				VK_FORMAT_R32G32B32_SFLOAT,
-				sizeof(float) * 5);
-		// Location 3 : Normal
-		vertices.attributeDescriptions[3] =
-			vks::initializers::vertexInputAttributeDescription(
-				VERTEX_BUFFER_BIND_ID,
-				3,
-				VK_FORMAT_R32G32B32_SFLOAT,
-				sizeof(float) * 8);
-
-		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()
 	{
 		std::vector<VkDescriptorPoolSize> poolSizes =
@@ -777,45 +722,56 @@ public:
 		shaderStages[0] = loadShader(getAssetPath() + "shaders/offscreen/quad.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
 		shaderStages[1] = loadShader(getAssetPath() + "shaders/offscreen/quad.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
 
-		VkGraphicsPipelineCreateInfo pipelineCreateInfo =
-			vks::initializers::pipelineCreateInfo(
-				pipelineLayouts.textured,
-				renderPass,
-				0);
+		// Vertex bindings and attributes
+		const std::vector<VkVertexInputBindingDescription> vertexInputBindings = {
+			vks::initializers::vertexInputBindingDescription(0, vertexLayout.stride(), VK_VERTEX_INPUT_RATE_VERTEX),
+		};
+		const std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
+			vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0),					// Location 0: Position			
+			vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32_SFLOAT, sizeof(float) * 3),		// Location 1: UV
+			vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 5),	// Location 2: Color
+			vks::initializers::vertexInputAttributeDescription(0, 3, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 8),	// Location 3: Normal
+		};
+		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 = &vertices.inputState;
-		pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
-		pipelineCreateInfo.pRasterizationState = &rasterizationState;
-		pipelineCreateInfo.pColorBlendState = &colorBlendState;
-		pipelineCreateInfo.pMultisampleState = &multisampleState;
-		pipelineCreateInfo.pViewportState = &viewportState;
-		pipelineCreateInfo.pDepthStencilState = &depthStencilState;
-		pipelineCreateInfo.pDynamicState = &dynamicState;
-		pipelineCreateInfo.stageCount = shaderStages.size();
-		pipelineCreateInfo.pStages = shaderStages.data();
+		VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayouts.textured, renderPass, 0);
+		pipelineCI.pVertexInputState = &vertexInputState;
+		pipelineCI.pInputAssemblyState = &inputAssemblyState;
+		pipelineCI.pRasterizationState = &rasterizationState;
+		pipelineCI.pColorBlendState = &colorBlendState;
+		pipelineCI.pMultisampleState = &multisampleState;
+		pipelineCI.pViewportState = &viewportState;
+		pipelineCI.pDepthStencilState = &depthStencilState;
+		pipelineCI.pDynamicState = &dynamicState;
+		pipelineCI.stageCount = shaderStages.size();
+		pipelineCI.pStages = shaderStages.data();
 
-		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.debug));
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.debug));
 
 		// Mirror
 		shaderStages[0] = loadShader(getAssetPath() + "shaders/offscreen/mirror.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
 		shaderStages[1] = loadShader(getAssetPath() + "shaders/offscreen/mirror.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
 		rasterizationState.cullMode = VK_CULL_MODE_NONE;
-		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.mirror));
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.mirror));
 
 		// Flip culling
 		rasterizationState.cullMode = VK_CULL_MODE_BACK_BIT;
 
 		// Phong shading pipelines
-		pipelineCreateInfo.layout = pipelineLayouts.shaded;
+		pipelineCI.layout = pipelineLayouts.shaded;
 		// Scene
 		shaderStages[0] = loadShader(getAssetPath() + "shaders/offscreen/phong.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
 		shaderStages[1] = loadShader(getAssetPath() + "shaders/offscreen/phong.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
-		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.shaded));
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.shaded));
 		// Offscreen
 		// Flip culling
 		rasterizationState.cullMode = VK_CULL_MODE_FRONT_BIT;
-		pipelineCreateInfo.renderPass = offscreenPass.renderPass;
-		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.shadedOffscreen));
+		pipelineCI.renderPass = offscreenPass.renderPass;
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.shadedOffscreen));
 
 	}
 
@@ -953,7 +909,6 @@ public:
 		loadAssets();
 		generateQuad();
 		prepareOffscreen();
-		setupVertexDescriptions();
 		prepareUniformBuffers();
 		setupDescriptorSetLayout();
 		preparePipelines();

external/tinygltf/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Syoyo Fujita, Aurélien Chatelain and many contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

external/tinygltf/README.md

@@ -0,0 +1,157 @@
+# Header only C++ tiny glTF library(loader/saver).
+
+`TinyGLTF` is a header only C++11 glTF 2.0 https://github.com/KhronosGroup/glTF library.
+
+## Status
+
+Work in process(`devel` branch). Very near to release, but need more tests and examples.
+
+`TinyGLTF` uses Niels Lohmann's json library(https://github.com/nlohmann/json), so now it requires C++11 compiler.
+If you are looking for old, C++03 version, please use `devel-picojson` branch.  
+
+## Builds
+
+[![Build Status](https://travis-ci.org/syoyo/tinygltf.svg?branch=devel)](https://travis-ci.org/syoyo/tinygltf)
+
+[![Build status](https://ci.appveyor.com/api/projects/status/warngenu9wjjhlm8?svg=true)](https://ci.appveyor.com/project/syoyo/tinygltf)
+
+## Features
+
+* Written in portable C++. C++-11 with STL dependency only.
+  * [x] macOS + clang(LLVM)
+  * [x] iOS + clang
+  * [x] Linux + gcc/clang
+  * [x] Windows + MinGW
+  * [x] Windows + Visual Studio 2015 Update 3 or later.
+    * Visual Studio 2013 is not supported since they have limited C++11 support and failed to compile `json.hpp`.
+  * [x] Android + CrystaX(NDK drop-in replacement) GCC
+  * [x] Web using Emscripten(LLVM)
+* Moderate parsing time and memory consumption.
+* glTF specification v2.0.0
+  * [x] ASCII glTF
+  * [x] Binary glTF(GLB)
+  * [x] PBR material description
+* Buffers
+  * [x] Parse BASE64 encoded embedded buffer fata(DataURI).
+  * [x] Load `.bin` file.
+* Image(Using stb_image)
+  * [x] Parse BASE64 encoded embedded image fata(DataURI).
+  * [x] Load external image file.
+  * [x] PNG(8bit only)
+  * [x] JPEG(8bit only)
+  * [x] BMP
+  * [x] GIF
+
+## Examples
+
+* [glview](examples/glview) : Simple glTF geometry viewer.
+* [validator](examples/validator) : Simple glTF validator with JSON schema.
+
+## Projects using TinyGLTF
+
+* Physical based rendering with Vulkan using glTF 2.0 models https://github.com/SaschaWillems/Vulkan-glTF-PBR
+* GLTF loader plugin for OGRE 2.1. Support for PBR materials via HLMS/PBS https://github.com/Ybalrid/Ogre_glTF
+* [TinyGltfImporter](http://doc.magnum.graphics/magnum/classMagnum_1_1Trade_1_1TinyGltfImporter.html) plugin for [Magnum](https://github.com/mosra/magnum), a lightweight and modular C++11/C++14 graphics middleware for games and data visualization.
+* Your projects here! (Please send PR)
+
+## TODOs
+
+* [ ] Write C++ code generator from jSON schema for robust parsing.
+* [x] Serialization
+* [ ] Compression/decompression(Open3DGC, etc)
+* [ ] Support `extensions` and `extras` property
+* [ ] HDR image?
+  * [ ] OpenEXR extension through TinyEXR.
+* [ ] Write tests for `animation` and `skin` 
+
+## Licenses
+
+TinyGLTF is licensed under MIT license.
+
+TinyGLTF uses the following third party libraries.
+
+* json.hpp : Copyright (c) 2013-2017 Niels Lohmann. MIT license.
+* base64 : Copyright (C) 2004-2008 René Nyffenegger
+* stb_image.h : v2.08 - public domain image loader - [Github link](https://github.com/nothings/stb/blob/master/stb_image.h)
+* stb_image_write.h : v1.09 - public domain image writer - [Github link](https://github.com/nothings/stb/blob/master/stb_image_write.h)
+
+
+## Build and example
+
+Copy `stb_image.h`, `stb_image_write.h`, `json.hpp` and `tiny_gltf.h` to your project.
+
+### Loading glTF 2.0 model
+
+```c++
+// Define these only in *one* .cc file.
+#define TINYGLTF_IMPLEMENTATION
+#define STB_IMAGE_IMPLEMENTATION
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+// #define TINYGLTF_NOEXCEPTION // optional. disable exception handling.
+#include "tiny_gltf.h"
+
+using namespace tinygltf;
+
+Model model; 
+TinyGLTF loader;
+std::string err;
+  
+bool ret = loader.LoadASCIIFromFile(&model, &err, argv[1]);
+//bool ret = loader.LoadBinaryFromFile(&model, &err, argv[1]); // for binary glTF(.glb) 
+if (!err.empty()) {
+  printf("Err: %s\n", err.c_str());
+}
+
+if (!ret) {
+  printf("Failed to parse glTF\n");
+  return -1;
+}
+```
+
+## Compile options
+
+* `TINYGLTF_NOEXCEPTION` : Disable C++ exception in JSON parsing. You can use `-fno-exceptions` or by defining the symbol `JSON_NOEXCEPTION` and `TINYGLTF_NOEXCEPTION`  to fully remove C++ exception codes when compiling TinyGLTF.
+* `TINYGLTF_NO_STB_IMAGE` : Do not load images with stb_image. Instead use `TinyGLTF::SetImageLoader(LoadimageDataFunction LoadImageData, void *user_data)` to set a callback for loading images.
+* `TINYGLTF_NO_STB_IMAGE_WRITE` : Do not write images with stb_image_write. Instead use `TinyGLTF::SetImageWriter(WriteimageDataFunction WriteImageData, void *user_data)` to set a callback for writing images.
+
+### Saving gltTF 2.0 model
+* [ ] Buffers.
+  * [x] To file
+  * [x] Embedded
+  * [ ] Draco compressed?
+* [x] Images
+  * [x] To file
+  * [x] Embedded
+* [ ] Binary(.glb)
+
+## Running tests.
+
+### glTF parsing test
+
+#### Setup
+
+Python 2.6 or 2.7 required.
+Git clone https://github.com/KhronosGroup/glTF-Sample-Models to your local dir.
+
+#### Run parsing test
+
+After building `loader_example`, edit `test_runner.py`, then,
+
+```bash
+$ python test_runner.py
+```
+
+### Unit tests
+
+```bash
+$ cd tests
+$ make
+$ ./tester
+$ ./tester_noexcept
+```
+
+## Third party licenses
+
+* json.hpp : Licensed under the MIT License <http://opensource.org/licenses/MIT>. Copyright (c) 2013-2017 Niels Lohmann <http://nlohmann.me>.
+* stb_image : Public domain.
+* catch : Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved. Distributed under the Boost Software License, Version 1.0.