update irradiance caculation

CMakeSettings.json

@@ -20,6 +20,17 @@
       "cmakeCommandArgs": "",
       "buildCommandArgs": "",
       "ctestCommandArgs": "",
+      "inheritEnvironments": [ "clang_cl_x64_x64" ]
+    },
+    {
+      "name": "x64-Clang-Release",
+      "generator": "Ninja",
+      "configurationType": "RelWithDebInfo",
+      "buildRoot": "${projectDir}\\out\\build\\${name}",
+      "installRoot": "${projectDir}\\out\\install\\${name}",
+      "cmakeCommandArgs": "",
+      "buildCommandArgs": "",
+      "ctestCommandArgs": "",
       "inheritEnvironments": [ "clang_cl_x64_x64" ],
       "variables": []
     }

homework/homework1/homework1.h

@@ -249,6 +249,11 @@ public:
 		vks::Buffer skinSSBO;
 	} shaderData;
 
+	struct StagingBuffer {
+		VkBuffer buffer;
+		VkDeviceMemory memory;
+	} vertexStaging, indexStaging;
+
 	struct Pipelines {
 		VkPipeline solid;
 		VkPipeline wireframe = VK_NULL_HANDLE;
@@ -325,6 +330,28 @@ public:
 		vks::Texture2D lutBrdf;
 	} ibltextures;
 
+	struct OffScreen
+	{
+		VkImage image;
+		VkImageView view;
+		VkDeviceMemory memory;
+		VkFramebuffer framebuffer;
+	} offscreen;
+
+	struct IrradiancePushBlock
+	{
+		glm::mat4 mvp;
+		// Sampling deltas
+		float deltaPhi = (2.0f * float(M_PI)) / 180.0f;
+		float deltaTheta = (0.5f * float(M_PI)) / 64.0f;
+	} irradinacePushBlock;
+
+	struct PrefilterPushBlock {
+		glm::mat4 mvp;
+		float roughness;
+		uint32_t numSamples = 32u;
+	} prefilterPushBlock;
+
 	VulkanglTFModel skyboxModel;
 
 	VulkanExample();
@@ -356,7 +383,7 @@ public:
 		shaderData.buffer.destroy();
 		shaderData.skinSSBO.destroy();
 	}
-	void         loadglTFFile(std::string filename);
+	void         loadglTFFile(std::string filename, VulkanglTFModel& model, bool bSkyboxFlag = false);
 	virtual void getEnabledFeatures();
 	void createAttachment(VkFormat format, VkImageUsageFlagBits usage, FrameBufferAttachment* attachment, uint32_t width, uint32_t height);
 	virtual void setupFrameBuffer();
@@ -365,6 +392,9 @@ public:
 	void         setupDescriptors();
 	void         preparePipelines();
 	void prepareToneMappingPipeline();
+	void generateIrradianceCubemap();
+	void generatePrefilteredCubemap();
+	void generateBRDFLUT();
 	void         prepareUniformBuffers();
 	void         updateUniformBuffers();
 	void         prepare();