922 lines
42 KiB
C++
922 lines
42 KiB
C++
/*
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* Vulkan Example - Hardware accelerated ray tracing example using SBT data
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*
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* Uses the data section of each shader binding table record to color the background and geometry
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*
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* Copyright (C) 2019-2020 by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include "vulkanexamplebase.h"
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// Holds data for a ray tracing scratch buffer that is used as a temporary storage
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struct RayTracingScratchBuffer
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{
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uint64_t deviceAddress = 0;
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VkBuffer handle = VK_NULL_HANDLE;
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VkDeviceMemory memory = VK_NULL_HANDLE;
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};
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// Ray tracing acceleration structure
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struct AccelerationStructure {
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VkAccelerationStructureKHR handle;
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uint64_t deviceAddress = 0;
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VkDeviceMemory memory;
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VkBuffer buffer;
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};
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class VulkanExample : public VulkanExampleBase
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{
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public:
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PFN_vkGetBufferDeviceAddressKHR vkGetBufferDeviceAddressKHR;
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PFN_vkCreateAccelerationStructureKHR vkCreateAccelerationStructureKHR;
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PFN_vkDestroyAccelerationStructureKHR vkDestroyAccelerationStructureKHR;
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PFN_vkGetAccelerationStructureBuildSizesKHR vkGetAccelerationStructureBuildSizesKHR;
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PFN_vkGetAccelerationStructureDeviceAddressKHR vkGetAccelerationStructureDeviceAddressKHR;
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PFN_vkCmdBuildAccelerationStructuresKHR vkCmdBuildAccelerationStructuresKHR;
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PFN_vkBuildAccelerationStructuresKHR vkBuildAccelerationStructuresKHR;
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PFN_vkCmdTraceRaysKHR vkCmdTraceRaysKHR;
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PFN_vkGetRayTracingShaderGroupHandlesKHR vkGetRayTracingShaderGroupHandlesKHR;
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PFN_vkCreateRayTracingPipelinesKHR vkCreateRayTracingPipelinesKHR;
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VkPhysicalDeviceRayTracingPipelinePropertiesKHR rayTracingPipelineProperties{};
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VkPhysicalDeviceAccelerationStructureFeaturesKHR accelerationStructureFeatures{};
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VkPhysicalDeviceBufferDeviceAddressFeatures enabledBufferDeviceAddresFeatures{};
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VkPhysicalDeviceRayTracingPipelineFeaturesKHR enabledRayTracingPipelineFeatures{};
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VkPhysicalDeviceAccelerationStructureFeaturesKHR enabledAccelerationStructureFeatures{};
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AccelerationStructure bottomLevelAS{};
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AccelerationStructure topLevelAS{};
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vks::Buffer vertexBuffer;
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vks::Buffer indexBuffer;
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uint32_t indexCount;
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vks::Buffer transformBuffer;
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std::vector<VkRayTracingShaderGroupCreateInfoKHR> shaderGroups{};
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vks::Buffer raygenShaderBindingTable;
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vks::Buffer missShaderBindingTable;
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vks::Buffer hitShaderBindingTable;
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struct StorageImage {
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VkDeviceMemory memory;
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VkImage image;
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VkImageView view;
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VkFormat format;
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} storageImage;
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struct UniformData {
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glm::mat4 viewInverse;
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glm::mat4 projInverse;
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} uniformData;
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vks::Buffer ubo;
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VkPipeline pipeline;
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VkPipelineLayout pipelineLayout;
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VkDescriptorSet descriptorSet;
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VkDescriptorSetLayout descriptorSetLayout;
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VulkanExample() : VulkanExampleBase()
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{
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title = "Ray tracing SBT data";
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settings.overlay = false;
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camera.type = Camera::CameraType::lookat;
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 512.0f);
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camera.setRotation(glm::vec3(0.0f, 0.0f, 0.0f));
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camera.setTranslation(glm::vec3(0.0f, 0.0f, -2.5f));
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// Require Vulkan 1.1
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apiVersion = VK_API_VERSION_1_1;
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// Ray tracing related extensions required by this sample
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enabledDeviceExtensions.push_back(VK_KHR_ACCELERATION_STRUCTURE_EXTENSION_NAME);
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enabledDeviceExtensions.push_back(VK_KHR_RAY_TRACING_PIPELINE_EXTENSION_NAME);
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// Required by VK_KHR_acceleration_structure
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enabledDeviceExtensions.push_back(VK_KHR_BUFFER_DEVICE_ADDRESS_EXTENSION_NAME);
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enabledDeviceExtensions.push_back(VK_KHR_DEFERRED_HOST_OPERATIONS_EXTENSION_NAME);
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enabledDeviceExtensions.push_back(VK_EXT_DESCRIPTOR_INDEXING_EXTENSION_NAME);
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// Required for VK_KHR_ray_tracing_pipeline
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enabledDeviceExtensions.push_back(VK_KHR_SPIRV_1_4_EXTENSION_NAME);
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// Required by VK_KHR_spirv_1_4
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enabledDeviceExtensions.push_back(VK_KHR_SHADER_FLOAT_CONTROLS_EXTENSION_NAME);
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}
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~VulkanExample()
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{
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vkDestroyPipeline(device, pipeline, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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vkDestroyImageView(device, storageImage.view, nullptr);
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vkDestroyImage(device, storageImage.image, nullptr);
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vkFreeMemory(device, storageImage.memory, nullptr);
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vkFreeMemory(device, bottomLevelAS.memory, nullptr);
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vkDestroyBuffer(device, bottomLevelAS.buffer, nullptr);
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vkDestroyAccelerationStructureKHR(device, bottomLevelAS.handle, nullptr);
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vkFreeMemory(device, topLevelAS.memory, nullptr);
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vkDestroyBuffer(device, topLevelAS.buffer, nullptr);
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vkDestroyAccelerationStructureKHR(device, topLevelAS.handle, nullptr);
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vertexBuffer.destroy();
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indexBuffer.destroy();
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transformBuffer.destroy();
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raygenShaderBindingTable.destroy();
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missShaderBindingTable.destroy();
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hitShaderBindingTable.destroy();
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ubo.destroy();
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}
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/*
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Create a scratch buffer to hold temporary data for a ray tracing acceleration structure
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*/
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RayTracingScratchBuffer createScratchBuffer(VkDeviceSize size)
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{
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RayTracingScratchBuffer scratchBuffer{};
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VkBufferCreateInfo bufferCreateInfo{};
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bufferCreateInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
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bufferCreateInfo.size = size;
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bufferCreateInfo.usage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT;
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VK_CHECK_RESULT(vkCreateBuffer(device, &bufferCreateInfo, nullptr, &scratchBuffer.handle));
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VkMemoryRequirements memoryRequirements{};
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vkGetBufferMemoryRequirements(device, scratchBuffer.handle, &memoryRequirements);
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VkMemoryAllocateFlagsInfo memoryAllocateFlagsInfo{};
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memoryAllocateFlagsInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_FLAGS_INFO;
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memoryAllocateFlagsInfo.flags = VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT_KHR;
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VkMemoryAllocateInfo memoryAllocateInfo = {};
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memoryAllocateInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
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memoryAllocateInfo.pNext = &memoryAllocateFlagsInfo;
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memoryAllocateInfo.allocationSize = memoryRequirements.size;
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memoryAllocateInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memoryAllocateInfo, nullptr, &scratchBuffer.memory));
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VK_CHECK_RESULT(vkBindBufferMemory(device, scratchBuffer.handle, scratchBuffer.memory, 0));
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VkBufferDeviceAddressInfoKHR bufferDeviceAddressInfo{};
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bufferDeviceAddressInfo.sType = VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO;
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bufferDeviceAddressInfo.buffer = scratchBuffer.handle;
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scratchBuffer.deviceAddress = vkGetBufferDeviceAddressKHR(device, &bufferDeviceAddressInfo);
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return scratchBuffer;
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}
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void deleteScratchBuffer(RayTracingScratchBuffer& scratchBuffer)
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{
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if (scratchBuffer.memory != VK_NULL_HANDLE) {
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vkFreeMemory(device, scratchBuffer.memory, nullptr);
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}
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if (scratchBuffer.handle != VK_NULL_HANDLE) {
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vkDestroyBuffer(device, scratchBuffer.handle, nullptr);
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}
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}
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void createAccelerationStructureBuffer(AccelerationStructure &accelerationStructure, VkAccelerationStructureBuildSizesInfoKHR buildSizeInfo)
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{
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VkBufferCreateInfo bufferCreateInfo{};
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bufferCreateInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
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bufferCreateInfo.size = buildSizeInfo.accelerationStructureSize;
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bufferCreateInfo.usage = VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_STORAGE_BIT_KHR | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT;
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VK_CHECK_RESULT(vkCreateBuffer(device, &bufferCreateInfo, nullptr, &accelerationStructure.buffer));
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VkMemoryRequirements memoryRequirements{};
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vkGetBufferMemoryRequirements(device, accelerationStructure.buffer, &memoryRequirements);
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VkMemoryAllocateFlagsInfo memoryAllocateFlagsInfo{};
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memoryAllocateFlagsInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_FLAGS_INFO;
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memoryAllocateFlagsInfo.flags = VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT_KHR;
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VkMemoryAllocateInfo memoryAllocateInfo{};
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memoryAllocateInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
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memoryAllocateInfo.pNext = &memoryAllocateFlagsInfo;
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memoryAllocateInfo.allocationSize = memoryRequirements.size;
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memoryAllocateInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memoryAllocateInfo, nullptr, &accelerationStructure.memory));
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VK_CHECK_RESULT(vkBindBufferMemory(device, accelerationStructure.buffer, accelerationStructure.memory, 0));
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}
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/*
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Gets the device address from a buffer that's required for some of the buffers used for ray tracing
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*/
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uint64_t getBufferDeviceAddress(VkBuffer buffer)
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{
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VkBufferDeviceAddressInfoKHR bufferDeviceAI{};
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bufferDeviceAI.sType = VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO;
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bufferDeviceAI.buffer = buffer;
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return vkGetBufferDeviceAddressKHR(device, &bufferDeviceAI);
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}
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/*
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Set up a storage image that the ray generation shader will be writing to
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*/
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void createStorageImage()
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{
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VkImageCreateInfo image = vks::initializers::imageCreateInfo();
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image.imageType = VK_IMAGE_TYPE_2D;
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image.format = swapChain.colorFormat;
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image.extent.width = width;
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image.extent.height = height;
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image.extent.depth = 1;
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image.mipLevels = 1;
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image.arrayLayers = 1;
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image.samples = VK_SAMPLE_COUNT_1_BIT;
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image.tiling = VK_IMAGE_TILING_OPTIMAL;
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image.usage = VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_STORAGE_BIT;
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image.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
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VK_CHECK_RESULT(vkCreateImage(device, &image, nullptr, &storageImage.image));
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VkMemoryRequirements memReqs;
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vkGetImageMemoryRequirements(device, storageImage.image, &memReqs);
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VkMemoryAllocateInfo memoryAllocateInfo = vks::initializers::memoryAllocateInfo();
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memoryAllocateInfo.allocationSize = memReqs.size;
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memoryAllocateInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memoryAllocateInfo, nullptr, &storageImage.memory));
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VK_CHECK_RESULT(vkBindImageMemory(device, storageImage.image, storageImage.memory, 0));
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VkImageViewCreateInfo colorImageView = vks::initializers::imageViewCreateInfo();
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colorImageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
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colorImageView.format = swapChain.colorFormat;
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colorImageView.subresourceRange = {};
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colorImageView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
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colorImageView.subresourceRange.baseMipLevel = 0;
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colorImageView.subresourceRange.levelCount = 1;
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colorImageView.subresourceRange.baseArrayLayer = 0;
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colorImageView.subresourceRange.layerCount = 1;
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colorImageView.image = storageImage.image;
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VK_CHECK_RESULT(vkCreateImageView(device, &colorImageView, nullptr, &storageImage.view));
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VkCommandBuffer cmdBuffer = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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vks::tools::setImageLayout(cmdBuffer, storageImage.image,
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VK_IMAGE_LAYOUT_UNDEFINED,
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VK_IMAGE_LAYOUT_GENERAL,
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{ VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 });
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vulkanDevice->flushCommandBuffer(cmdBuffer, queue);
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}
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/*
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Create the bottom level acceleration structure contains the scene's actual geometry (vertices, triangles)
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*/
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void createBottomLevelAccelerationStructure()
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{
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// Setup vertices for a single triangle
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struct Vertex {
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float pos[3];
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};
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std::vector<Vertex> vertices = {
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{ { 1.0f, 1.0f, 0.0f } },
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{ { -1.0f, 1.0f, 0.0f } },
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{ { 0.0f, -1.0f, 0.0f } }
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};
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// Setup indices
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std::vector<uint32_t> indices = { 0, 1, 2 };
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indexCount = static_cast<uint32_t>(indices.size());
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// Setup identity transform matrix
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VkTransformMatrixKHR transformMatrix = {
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1.0f, 0.0f, 0.0f, 0.0f,
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0.0f, 1.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 1.0f, 0.0f
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};
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// Create buffers
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// For the sake of simplicity we won't stage the vertex data to the GPU memory
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// Vertex buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&vertexBuffer,
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vertices.size() * sizeof(Vertex),
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vertices.data()));
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// Index buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&indexBuffer,
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indices.size() * sizeof(uint32_t),
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indices.data()));
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// Transform buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&transformBuffer,
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sizeof(VkTransformMatrixKHR),
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&transformMatrix));
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VkDeviceOrHostAddressConstKHR vertexBufferDeviceAddress{};
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VkDeviceOrHostAddressConstKHR indexBufferDeviceAddress{};
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VkDeviceOrHostAddressConstKHR transformBufferDeviceAddress{};
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vertexBufferDeviceAddress.deviceAddress = getBufferDeviceAddress(vertexBuffer.buffer);
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indexBufferDeviceAddress.deviceAddress = getBufferDeviceAddress(indexBuffer.buffer);
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transformBufferDeviceAddress.deviceAddress = getBufferDeviceAddress(transformBuffer.buffer);
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// Build
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VkAccelerationStructureGeometryKHR accelerationStructureGeometry{};
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accelerationStructureGeometry.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_KHR;
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accelerationStructureGeometry.flags = VK_GEOMETRY_OPAQUE_BIT_KHR;
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accelerationStructureGeometry.geometryType = VK_GEOMETRY_TYPE_TRIANGLES_KHR;
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accelerationStructureGeometry.geometry.triangles.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_TRIANGLES_DATA_KHR;
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accelerationStructureGeometry.geometry.triangles.vertexFormat = VK_FORMAT_R32G32B32_SFLOAT;
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accelerationStructureGeometry.geometry.triangles.vertexData = vertexBufferDeviceAddress;
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accelerationStructureGeometry.geometry.triangles.maxVertex = 3;
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accelerationStructureGeometry.geometry.triangles.vertexStride = sizeof(Vertex);
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accelerationStructureGeometry.geometry.triangles.indexType = VK_INDEX_TYPE_UINT32;
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accelerationStructureGeometry.geometry.triangles.indexData = indexBufferDeviceAddress;
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accelerationStructureGeometry.geometry.triangles.transformData.deviceAddress = 0;
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accelerationStructureGeometry.geometry.triangles.transformData.hostAddress = nullptr;
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accelerationStructureGeometry.geometry.triangles.transformData = transformBufferDeviceAddress;
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// Get size info
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VkAccelerationStructureBuildGeometryInfoKHR accelerationStructureBuildGeometryInfo{};
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accelerationStructureBuildGeometryInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR;
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accelerationStructureBuildGeometryInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR;
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accelerationStructureBuildGeometryInfo.flags = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR;
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accelerationStructureBuildGeometryInfo.geometryCount = 1;
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accelerationStructureBuildGeometryInfo.pGeometries = &accelerationStructureGeometry;
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const uint32_t numTriangles = 1;
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VkAccelerationStructureBuildSizesInfoKHR accelerationStructureBuildSizesInfo{};
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accelerationStructureBuildSizesInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_SIZES_INFO_KHR;
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vkGetAccelerationStructureBuildSizesKHR(
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device,
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VK_ACCELERATION_STRUCTURE_BUILD_TYPE_DEVICE_KHR,
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&accelerationStructureBuildGeometryInfo,
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&numTriangles,
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&accelerationStructureBuildSizesInfo);
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createAccelerationStructureBuffer(bottomLevelAS, accelerationStructureBuildSizesInfo);
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VkAccelerationStructureCreateInfoKHR accelerationStructureCreateInfo{};
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accelerationStructureCreateInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_KHR;
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accelerationStructureCreateInfo.buffer = bottomLevelAS.buffer;
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accelerationStructureCreateInfo.size = accelerationStructureBuildSizesInfo.accelerationStructureSize;
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accelerationStructureCreateInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR;
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vkCreateAccelerationStructureKHR(device, &accelerationStructureCreateInfo, nullptr, &bottomLevelAS.handle);
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// Create a small scratch buffer used during build of the bottom level acceleration structure
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RayTracingScratchBuffer scratchBuffer = createScratchBuffer(accelerationStructureBuildSizesInfo.buildScratchSize);
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VkAccelerationStructureBuildGeometryInfoKHR accelerationBuildGeometryInfo{};
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accelerationBuildGeometryInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR;
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accelerationBuildGeometryInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR;
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accelerationBuildGeometryInfo.flags = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR;
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accelerationBuildGeometryInfo.mode = VK_BUILD_ACCELERATION_STRUCTURE_MODE_BUILD_KHR;
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accelerationBuildGeometryInfo.dstAccelerationStructure = bottomLevelAS.handle;
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accelerationBuildGeometryInfo.geometryCount = 1;
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accelerationBuildGeometryInfo.pGeometries = &accelerationStructureGeometry;
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accelerationBuildGeometryInfo.scratchData.deviceAddress = scratchBuffer.deviceAddress;
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VkAccelerationStructureBuildRangeInfoKHR accelerationStructureBuildRangeInfo{};
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accelerationStructureBuildRangeInfo.primitiveCount = numTriangles;
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accelerationStructureBuildRangeInfo.primitiveOffset = 0;
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accelerationStructureBuildRangeInfo.firstVertex = 0;
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accelerationStructureBuildRangeInfo.transformOffset = 0;
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std::vector<VkAccelerationStructureBuildRangeInfoKHR*> accelerationBuildStructureRangeInfos = { &accelerationStructureBuildRangeInfo };
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// Build the acceleration structure on the device via a one-time command buffer submission
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// Some implementations may support acceleration structure building on the host (VkPhysicalDeviceAccelerationStructureFeaturesKHR->accelerationStructureHostCommands), but we prefer device builds
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VkCommandBuffer commandBuffer = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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vkCmdBuildAccelerationStructuresKHR(
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commandBuffer,
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1,
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&accelerationBuildGeometryInfo,
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accelerationBuildStructureRangeInfos.data());
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vulkanDevice->flushCommandBuffer(commandBuffer, queue);
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VkAccelerationStructureDeviceAddressInfoKHR accelerationDeviceAddressInfo{};
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accelerationDeviceAddressInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_DEVICE_ADDRESS_INFO_KHR;
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accelerationDeviceAddressInfo.accelerationStructure = bottomLevelAS.handle;
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bottomLevelAS.deviceAddress = vkGetAccelerationStructureDeviceAddressKHR(device, &accelerationDeviceAddressInfo);
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deleteScratchBuffer(scratchBuffer);
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}
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/*
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The top level acceleration structure contains the scene's object instances
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|
*/
|
|
void createTopLevelAccelerationStructure()
|
|
{
|
|
VkTransformMatrixKHR transformMatrix = {
|
|
1.0f, 0.0f, 0.0f, 0.0f,
|
|
0.0f, 1.0f, 0.0f, 0.0f,
|
|
0.0f, 0.0f, 1.0f, 0.0f };
|
|
|
|
VkAccelerationStructureInstanceKHR instance{};
|
|
instance.transform = transformMatrix;
|
|
instance.instanceCustomIndex = 0;
|
|
instance.mask = 0xFF;
|
|
instance.instanceShaderBindingTableRecordOffset = 0;
|
|
instance.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
|
|
instance.accelerationStructureReference = bottomLevelAS.deviceAddress;
|
|
|
|
// Buffer for instance data
|
|
vks::Buffer instancesBuffer;
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&instancesBuffer,
|
|
sizeof(VkAccelerationStructureInstanceKHR),
|
|
&instance));
|
|
|
|
VkDeviceOrHostAddressConstKHR instanceDataDeviceAddress{};
|
|
instanceDataDeviceAddress.deviceAddress = getBufferDeviceAddress(instancesBuffer.buffer);
|
|
|
|
VkAccelerationStructureGeometryKHR accelerationStructureGeometry{};
|
|
accelerationStructureGeometry.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_KHR;
|
|
accelerationStructureGeometry.geometryType = VK_GEOMETRY_TYPE_INSTANCES_KHR;
|
|
accelerationStructureGeometry.flags = VK_GEOMETRY_OPAQUE_BIT_KHR;
|
|
accelerationStructureGeometry.geometry.instances.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR;
|
|
accelerationStructureGeometry.geometry.instances.arrayOfPointers = VK_FALSE;
|
|
accelerationStructureGeometry.geometry.instances.data = instanceDataDeviceAddress;
|
|
|
|
// Get size info
|
|
/*
|
|
The pSrcAccelerationStructure, dstAccelerationStructure, and mode members of pBuildInfo are ignored. Any VkDeviceOrHostAddressKHR members of pBuildInfo are ignored by this command, except that the hostAddress member of VkAccelerationStructureGeometryTrianglesDataKHR::transformData will be examined to check if it is NULL.*
|
|
*/
|
|
VkAccelerationStructureBuildGeometryInfoKHR accelerationStructureBuildGeometryInfo{};
|
|
accelerationStructureBuildGeometryInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR;
|
|
accelerationStructureBuildGeometryInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR;
|
|
accelerationStructureBuildGeometryInfo.flags = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR;
|
|
accelerationStructureBuildGeometryInfo.geometryCount = 1;
|
|
accelerationStructureBuildGeometryInfo.pGeometries = &accelerationStructureGeometry;
|
|
|
|
uint32_t primitive_count = 1;
|
|
|
|
VkAccelerationStructureBuildSizesInfoKHR accelerationStructureBuildSizesInfo{};
|
|
accelerationStructureBuildSizesInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_SIZES_INFO_KHR;
|
|
vkGetAccelerationStructureBuildSizesKHR(
|
|
device,
|
|
VK_ACCELERATION_STRUCTURE_BUILD_TYPE_DEVICE_KHR,
|
|
&accelerationStructureBuildGeometryInfo,
|
|
&primitive_count,
|
|
&accelerationStructureBuildSizesInfo);
|
|
|
|
createAccelerationStructureBuffer(topLevelAS, accelerationStructureBuildSizesInfo);
|
|
|
|
VkAccelerationStructureCreateInfoKHR accelerationStructureCreateInfo{};
|
|
accelerationStructureCreateInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_KHR;
|
|
accelerationStructureCreateInfo.buffer = topLevelAS.buffer;
|
|
accelerationStructureCreateInfo.size = accelerationStructureBuildSizesInfo.accelerationStructureSize;
|
|
accelerationStructureCreateInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR;
|
|
vkCreateAccelerationStructureKHR(device, &accelerationStructureCreateInfo, nullptr, &topLevelAS.handle);
|
|
|
|
// Create a small scratch buffer used during build of the top level acceleration structure
|
|
RayTracingScratchBuffer scratchBuffer = createScratchBuffer(accelerationStructureBuildSizesInfo.buildScratchSize);
|
|
|
|
VkAccelerationStructureBuildGeometryInfoKHR accelerationBuildGeometryInfo{};
|
|
accelerationBuildGeometryInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR;
|
|
accelerationBuildGeometryInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR;
|
|
accelerationBuildGeometryInfo.flags = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR;
|
|
accelerationBuildGeometryInfo.mode = VK_BUILD_ACCELERATION_STRUCTURE_MODE_BUILD_KHR;
|
|
accelerationBuildGeometryInfo.dstAccelerationStructure = topLevelAS.handle;
|
|
accelerationBuildGeometryInfo.geometryCount = 1;
|
|
accelerationBuildGeometryInfo.pGeometries = &accelerationStructureGeometry;
|
|
accelerationBuildGeometryInfo.scratchData.deviceAddress = scratchBuffer.deviceAddress;
|
|
|
|
VkAccelerationStructureBuildRangeInfoKHR accelerationStructureBuildRangeInfo{};
|
|
accelerationStructureBuildRangeInfo.primitiveCount = 1;
|
|
accelerationStructureBuildRangeInfo.primitiveOffset = 0;
|
|
accelerationStructureBuildRangeInfo.firstVertex = 0;
|
|
accelerationStructureBuildRangeInfo.transformOffset = 0;
|
|
std::vector<VkAccelerationStructureBuildRangeInfoKHR*> accelerationBuildStructureRangeInfos = { &accelerationStructureBuildRangeInfo };
|
|
|
|
// Build the acceleration structure on the device via a one-time command buffer submission
|
|
// Some implementations may support acceleration structure building on the host (VkPhysicalDeviceAccelerationStructureFeaturesKHR->accelerationStructureHostCommands), but we prefer device builds
|
|
VkCommandBuffer commandBuffer = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
|
vkCmdBuildAccelerationStructuresKHR(
|
|
commandBuffer,
|
|
1,
|
|
&accelerationBuildGeometryInfo,
|
|
accelerationBuildStructureRangeInfos.data());
|
|
vulkanDevice->flushCommandBuffer(commandBuffer, queue);
|
|
|
|
VkAccelerationStructureDeviceAddressInfoKHR accelerationDeviceAddressInfo{};
|
|
accelerationDeviceAddressInfo.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_DEVICE_ADDRESS_INFO_KHR;
|
|
accelerationDeviceAddressInfo.accelerationStructure = topLevelAS.handle;
|
|
topLevelAS.deviceAddress = vkGetAccelerationStructureDeviceAddressKHR(device, &accelerationDeviceAddressInfo);
|
|
|
|
deleteScratchBuffer(scratchBuffer);
|
|
instancesBuffer.destroy();
|
|
}
|
|
|
|
/*
|
|
Create the Shader Binding Tables that binds the programs and top-level acceleration structure
|
|
|
|
SBT Layout used in this sample:
|
|
|
|
/-----------\
|
|
| raygen |
|
|
|-----------|
|
|
| miss |
|
|
|-----------|
|
|
| hit |
|
|
\-----------/
|
|
|
|
*/
|
|
void createShaderBindingTable() {
|
|
const uint32_t handleSize = rayTracingPipelineProperties.shaderGroupHandleSize;
|
|
const uint32_t handleSizeAligned = vks::tools::alignedSize(rayTracingPipelineProperties.shaderGroupHandleSize, rayTracingPipelineProperties.shaderGroupHandleAlignment);
|
|
const uint32_t groupCount = static_cast<uint32_t>(shaderGroups.size());
|
|
const uint32_t sbtSize = groupCount * handleSizeAligned;
|
|
|
|
std::vector<uint8_t> shaderHandleStorage(sbtSize);
|
|
VK_CHECK_RESULT(vkGetRayTracingShaderGroupHandlesKHR(device, pipeline, 0, groupCount, sbtSize, shaderHandleStorage.data()));
|
|
|
|
const VkBufferUsageFlags bufferUsageFlags = VK_BUFFER_USAGE_SHADER_BINDING_TABLE_BIT_KHR | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT;
|
|
const VkMemoryPropertyFlags memoryUsageFlags = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(bufferUsageFlags, memoryUsageFlags, &raygenShaderBindingTable, handleSize + sizeof(float) * 3));
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(bufferUsageFlags, memoryUsageFlags, &missShaderBindingTable, handleSize + sizeof(float) * 3));
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(bufferUsageFlags, memoryUsageFlags, &hitShaderBindingTable, handleSize + sizeof(float) * 3));
|
|
|
|
// Copy handles
|
|
raygenShaderBindingTable.map();
|
|
missShaderBindingTable.map();
|
|
hitShaderBindingTable.map();
|
|
memcpy(raygenShaderBindingTable.mapped, shaderHandleStorage.data(), handleSize);
|
|
memcpy(missShaderBindingTable.mapped, shaderHandleStorage.data() + handleSizeAligned, handleSize);
|
|
memcpy(hitShaderBindingTable.mapped, shaderHandleStorage.data() + handleSizeAligned * 2, handleSize);
|
|
|
|
// set raygen sbt colors
|
|
{
|
|
glm::vec3 color(1.f, 0.f, 0.f);
|
|
memcpy(((uint8_t*)(raygenShaderBindingTable.mapped)) + handleSize, &color, sizeof(glm::vec3));
|
|
}
|
|
|
|
// set chit sbt colors
|
|
{
|
|
glm::vec3 color(0.f, 1.f, 0.f);
|
|
memcpy(((uint8_t*)(hitShaderBindingTable.mapped)) + handleSize, &color, sizeof(glm::vec3));
|
|
}
|
|
}
|
|
|
|
/*
|
|
Create the descriptor sets used for the ray tracing dispatch
|
|
*/
|
|
void createDescriptorSets()
|
|
{
|
|
std::vector<VkDescriptorPoolSize> poolSizes = {
|
|
{ VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR, 1 },
|
|
{ VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1 },
|
|
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1 }
|
|
};
|
|
VkDescriptorPoolCreateInfo descriptorPoolCreateInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 1);
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolCreateInfo, nullptr, &descriptorPool));
|
|
|
|
VkDescriptorSetAllocateInfo descriptorSetAllocateInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorSetAllocateInfo, &descriptorSet));
|
|
|
|
VkWriteDescriptorSetAccelerationStructureKHR descriptorAccelerationStructureInfo{};
|
|
descriptorAccelerationStructureInfo.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_KHR;
|
|
descriptorAccelerationStructureInfo.accelerationStructureCount = 1;
|
|
descriptorAccelerationStructureInfo.pAccelerationStructures = &topLevelAS.handle;
|
|
|
|
VkWriteDescriptorSet accelerationStructureWrite{};
|
|
accelerationStructureWrite.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
|
|
// The specialized acceleration structure descriptor has to be chained
|
|
accelerationStructureWrite.pNext = &descriptorAccelerationStructureInfo;
|
|
accelerationStructureWrite.dstSet = descriptorSet;
|
|
accelerationStructureWrite.dstBinding = 0;
|
|
accelerationStructureWrite.descriptorCount = 1;
|
|
accelerationStructureWrite.descriptorType = VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR;
|
|
|
|
VkDescriptorImageInfo storageImageDescriptor{};
|
|
storageImageDescriptor.imageView = storageImage.view;
|
|
storageImageDescriptor.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
|
|
|
|
VkWriteDescriptorSet resultImageWrite = vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1, &storageImageDescriptor);
|
|
VkWriteDescriptorSet uniformBufferWrite = vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 2, &ubo.descriptor);
|
|
|
|
std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
|
|
accelerationStructureWrite,
|
|
resultImageWrite,
|
|
uniformBufferWrite
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, VK_NULL_HANDLE);
|
|
}
|
|
|
|
/*
|
|
Create our ray tracing pipeline
|
|
*/
|
|
void createRayTracingPipeline()
|
|
{
|
|
VkDescriptorSetLayoutBinding accelerationStructureLayoutBinding{};
|
|
accelerationStructureLayoutBinding.binding = 0;
|
|
accelerationStructureLayoutBinding.descriptorType = VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR;
|
|
accelerationStructureLayoutBinding.descriptorCount = 1;
|
|
accelerationStructureLayoutBinding.stageFlags = VK_SHADER_STAGE_RAYGEN_BIT_KHR;
|
|
|
|
VkDescriptorSetLayoutBinding resultImageLayoutBinding{};
|
|
resultImageLayoutBinding.binding = 1;
|
|
resultImageLayoutBinding.descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
|
|
resultImageLayoutBinding.descriptorCount = 1;
|
|
resultImageLayoutBinding.stageFlags = VK_SHADER_STAGE_RAYGEN_BIT_KHR;
|
|
|
|
VkDescriptorSetLayoutBinding uniformBufferBinding{};
|
|
uniformBufferBinding.binding = 2;
|
|
uniformBufferBinding.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
|
|
uniformBufferBinding.descriptorCount = 1;
|
|
uniformBufferBinding.stageFlags = VK_SHADER_STAGE_RAYGEN_BIT_KHR;
|
|
|
|
std::vector<VkDescriptorSetLayoutBinding> bindings({
|
|
accelerationStructureLayoutBinding,
|
|
resultImageLayoutBinding,
|
|
uniformBufferBinding
|
|
});
|
|
|
|
VkDescriptorSetLayoutCreateInfo descriptorSetlayoutCI{};
|
|
descriptorSetlayoutCI.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
|
|
descriptorSetlayoutCI.bindingCount = static_cast<uint32_t>(bindings.size());
|
|
descriptorSetlayoutCI.pBindings = bindings.data();
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorSetlayoutCI, nullptr, &descriptorSetLayout));
|
|
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCI{};
|
|
pipelineLayoutCI.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
|
|
pipelineLayoutCI.setLayoutCount = 1;
|
|
pipelineLayoutCI.pSetLayouts = &descriptorSetLayout;
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelineLayout));
|
|
|
|
/*
|
|
Setup ray tracing shader groups
|
|
*/
|
|
std::vector<VkPipelineShaderStageCreateInfo> shaderStages;
|
|
|
|
// Ray generation group
|
|
{
|
|
shaderStages.push_back(loadShader(getShadersPath() + "raytracingsbtdata/raygen.rgen.spv", VK_SHADER_STAGE_RAYGEN_BIT_KHR));
|
|
VkRayTracingShaderGroupCreateInfoKHR shaderGroup{};
|
|
shaderGroup.sType = VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR;
|
|
shaderGroup.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_GENERAL_KHR;
|
|
shaderGroup.generalShader = static_cast<uint32_t>(shaderStages.size()) - 1;
|
|
shaderGroup.closestHitShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroup.anyHitShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroup.intersectionShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroups.push_back(shaderGroup);
|
|
}
|
|
|
|
// Miss group
|
|
{
|
|
shaderStages.push_back(loadShader(getShadersPath() + "raytracingsbtdata/miss.rmiss.spv", VK_SHADER_STAGE_MISS_BIT_KHR));
|
|
VkRayTracingShaderGroupCreateInfoKHR shaderGroup{};
|
|
shaderGroup.sType = VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR;
|
|
shaderGroup.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_GENERAL_KHR;
|
|
shaderGroup.generalShader = static_cast<uint32_t>(shaderStages.size()) - 1;
|
|
shaderGroup.closestHitShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroup.anyHitShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroup.intersectionShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroups.push_back(shaderGroup);
|
|
}
|
|
|
|
// Closest hit group
|
|
{
|
|
shaderStages.push_back(loadShader(getShadersPath() + "raytracingsbtdata/closesthit.rchit.spv", VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR));
|
|
VkRayTracingShaderGroupCreateInfoKHR shaderGroup{};
|
|
shaderGroup.sType = VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR;
|
|
shaderGroup.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_TRIANGLES_HIT_GROUP_KHR;
|
|
shaderGroup.generalShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroup.closestHitShader = static_cast<uint32_t>(shaderStages.size()) - 1;
|
|
shaderGroup.anyHitShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroup.intersectionShader = VK_SHADER_UNUSED_KHR;
|
|
shaderGroups.push_back(shaderGroup);
|
|
}
|
|
|
|
/*
|
|
Create the ray tracing pipeline
|
|
*/
|
|
VkRayTracingPipelineCreateInfoKHR rayTracingPipelineCI{};
|
|
rayTracingPipelineCI.sType = VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_CREATE_INFO_KHR;
|
|
rayTracingPipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
|
|
rayTracingPipelineCI.pStages = shaderStages.data();
|
|
rayTracingPipelineCI.groupCount = static_cast<uint32_t>(shaderGroups.size());
|
|
rayTracingPipelineCI.pGroups = shaderGroups.data();
|
|
rayTracingPipelineCI.maxPipelineRayRecursionDepth = 1;
|
|
rayTracingPipelineCI.layout = pipelineLayout;
|
|
VK_CHECK_RESULT(vkCreateRayTracingPipelinesKHR(device, VK_NULL_HANDLE, VK_NULL_HANDLE, 1, &rayTracingPipelineCI, nullptr, &pipeline));
|
|
}
|
|
|
|
/*
|
|
Create the uniform buffer used to pass matrices to the ray tracing ray generation shader
|
|
*/
|
|
void createUniformBuffer()
|
|
{
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&ubo,
|
|
sizeof(uniformData),
|
|
&uniformData));
|
|
VK_CHECK_RESULT(ubo.map());
|
|
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
/*
|
|
If the window has been resized, we need to recreate the storage image and it's descriptor
|
|
*/
|
|
void handleResize()
|
|
{
|
|
// Delete allocated resources
|
|
vkDestroyImageView(device, storageImage.view, nullptr);
|
|
vkDestroyImage(device, storageImage.image, nullptr);
|
|
vkFreeMemory(device, storageImage.memory, nullptr);
|
|
// Recreate image
|
|
createStorageImage();
|
|
// Update descriptor
|
|
VkDescriptorImageInfo storageImageDescriptor{ VK_NULL_HANDLE, storageImage.view, VK_IMAGE_LAYOUT_GENERAL };
|
|
VkWriteDescriptorSet resultImageWrite = vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1, &storageImageDescriptor);
|
|
vkUpdateDescriptorSets(device, 1, &resultImageWrite, 0, VK_NULL_HANDLE);
|
|
}
|
|
|
|
/*
|
|
Command buffer generation
|
|
*/
|
|
void buildCommandBuffers()
|
|
{
|
|
if (resized)
|
|
{
|
|
handleResize();
|
|
}
|
|
|
|
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
|
|
|
|
VkImageSubresourceRange subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
|
|
|
|
for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
|
|
{
|
|
VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
|
|
|
|
/*
|
|
Setup the buffer regions pointing to the shaders in our shader binding table
|
|
*/
|
|
|
|
const uint32_t handleSizeAligned = vks::tools::alignedSize(rayTracingPipelineProperties.shaderGroupHandleSize, rayTracingPipelineProperties.shaderGroupHandleAlignment);
|
|
|
|
VkStridedDeviceAddressRegionKHR raygenShaderSbtEntry{};
|
|
raygenShaderSbtEntry.deviceAddress = getBufferDeviceAddress(raygenShaderBindingTable.buffer);
|
|
raygenShaderSbtEntry.stride = handleSizeAligned;
|
|
raygenShaderSbtEntry.size = handleSizeAligned;
|
|
|
|
VkStridedDeviceAddressRegionKHR missShaderSbtEntry{};
|
|
missShaderSbtEntry.deviceAddress = getBufferDeviceAddress(missShaderBindingTable.buffer);
|
|
missShaderSbtEntry.stride = handleSizeAligned;
|
|
missShaderSbtEntry.size = handleSizeAligned;
|
|
|
|
VkStridedDeviceAddressRegionKHR hitShaderSbtEntry{};
|
|
hitShaderSbtEntry.deviceAddress = getBufferDeviceAddress(hitShaderBindingTable.buffer);
|
|
hitShaderSbtEntry.stride = handleSizeAligned;
|
|
hitShaderSbtEntry.size = handleSizeAligned;
|
|
|
|
VkStridedDeviceAddressRegionKHR callableShaderSbtEntry{};
|
|
|
|
/*
|
|
Dispatch the ray tracing commands
|
|
*/
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR, pipeline);
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR, pipelineLayout, 0, 1, &descriptorSet, 0, 0);
|
|
|
|
vkCmdTraceRaysKHR(
|
|
drawCmdBuffers[i],
|
|
&raygenShaderSbtEntry,
|
|
&missShaderSbtEntry,
|
|
&hitShaderSbtEntry,
|
|
&callableShaderSbtEntry,
|
|
width,
|
|
height,
|
|
1);
|
|
|
|
/*
|
|
Copy ray tracing output to swap chain image
|
|
*/
|
|
|
|
// Prepare current swap chain image as transfer destination
|
|
vks::tools::setImageLayout(
|
|
drawCmdBuffers[i],
|
|
swapChain.images[i],
|
|
VK_IMAGE_LAYOUT_UNDEFINED,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
subresourceRange);
|
|
|
|
// Prepare ray tracing output image as transfer source
|
|
vks::tools::setImageLayout(
|
|
drawCmdBuffers[i],
|
|
storageImage.image,
|
|
VK_IMAGE_LAYOUT_GENERAL,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
|
subresourceRange);
|
|
|
|
VkImageCopy copyRegion{};
|
|
copyRegion.srcSubresource = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, 1 };
|
|
copyRegion.srcOffset = { 0, 0, 0 };
|
|
copyRegion.dstSubresource = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, 1 };
|
|
copyRegion.dstOffset = { 0, 0, 0 };
|
|
copyRegion.extent = { width, height, 1 };
|
|
vkCmdCopyImage(drawCmdBuffers[i], storageImage.image, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL, swapChain.images[i], VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, ©Region);
|
|
|
|
// Transition swap chain image back for presentation
|
|
vks::tools::setImageLayout(
|
|
drawCmdBuffers[i],
|
|
swapChain.images[i],
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
|
|
subresourceRange);
|
|
|
|
// Transition ray tracing output image back to general layout
|
|
vks::tools::setImageLayout(
|
|
drawCmdBuffers[i],
|
|
storageImage.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_GENERAL,
|
|
subresourceRange);
|
|
|
|
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
|
|
}
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
uniformData.projInverse = glm::inverse(camera.matrices.perspective);
|
|
uniformData.viewInverse = glm::inverse(camera.matrices.view);
|
|
memcpy(ubo.mapped, &uniformData, sizeof(uniformData));
|
|
}
|
|
|
|
void getEnabledFeatures()
|
|
{
|
|
// Enable features required for ray tracing using feature chaining via pNext
|
|
enabledBufferDeviceAddresFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BUFFER_DEVICE_ADDRESS_FEATURES;
|
|
enabledBufferDeviceAddresFeatures.bufferDeviceAddress = VK_TRUE;
|
|
|
|
enabledRayTracingPipelineFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_FEATURES_KHR;
|
|
enabledRayTracingPipelineFeatures.rayTracingPipeline = VK_TRUE;
|
|
enabledRayTracingPipelineFeatures.pNext = &enabledBufferDeviceAddresFeatures;
|
|
|
|
enabledAccelerationStructureFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_FEATURES_KHR;
|
|
enabledAccelerationStructureFeatures.accelerationStructure = VK_TRUE;
|
|
enabledAccelerationStructureFeatures.pNext = &enabledRayTracingPipelineFeatures;
|
|
|
|
deviceCreatepNextChain = &enabledAccelerationStructureFeatures;
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
|
|
// Get ray tracing pipeline properties, which will be used later on in the sample
|
|
rayTracingPipelineProperties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_PROPERTIES_KHR;
|
|
VkPhysicalDeviceProperties2 deviceProperties2{};
|
|
deviceProperties2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
|
|
deviceProperties2.pNext = &rayTracingPipelineProperties;
|
|
vkGetPhysicalDeviceProperties2(physicalDevice, &deviceProperties2);
|
|
|
|
// Get acceleration structure properties, which will be used later on in the sample
|
|
accelerationStructureFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_FEATURES_KHR;
|
|
VkPhysicalDeviceFeatures2 deviceFeatures2{};
|
|
deviceFeatures2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2;
|
|
deviceFeatures2.pNext = &accelerationStructureFeatures;
|
|
vkGetPhysicalDeviceFeatures2(physicalDevice, &deviceFeatures2);
|
|
|
|
// Get the ray tracing and accelertion structure related function pointers required by this sample
|
|
vkGetBufferDeviceAddressKHR = reinterpret_cast<PFN_vkGetBufferDeviceAddressKHR>(vkGetDeviceProcAddr(device, "vkGetBufferDeviceAddressKHR"));
|
|
vkCmdBuildAccelerationStructuresKHR = reinterpret_cast<PFN_vkCmdBuildAccelerationStructuresKHR>(vkGetDeviceProcAddr(device, "vkCmdBuildAccelerationStructuresKHR"));
|
|
vkBuildAccelerationStructuresKHR = reinterpret_cast<PFN_vkBuildAccelerationStructuresKHR>(vkGetDeviceProcAddr(device, "vkBuildAccelerationStructuresKHR"));
|
|
vkCreateAccelerationStructureKHR = reinterpret_cast<PFN_vkCreateAccelerationStructureKHR>(vkGetDeviceProcAddr(device, "vkCreateAccelerationStructureKHR"));
|
|
vkDestroyAccelerationStructureKHR = reinterpret_cast<PFN_vkDestroyAccelerationStructureKHR>(vkGetDeviceProcAddr(device, "vkDestroyAccelerationStructureKHR"));
|
|
vkGetAccelerationStructureBuildSizesKHR = reinterpret_cast<PFN_vkGetAccelerationStructureBuildSizesKHR>(vkGetDeviceProcAddr(device, "vkGetAccelerationStructureBuildSizesKHR"));
|
|
vkGetAccelerationStructureDeviceAddressKHR = reinterpret_cast<PFN_vkGetAccelerationStructureDeviceAddressKHR>(vkGetDeviceProcAddr(device, "vkGetAccelerationStructureDeviceAddressKHR"));
|
|
vkCmdTraceRaysKHR = reinterpret_cast<PFN_vkCmdTraceRaysKHR>(vkGetDeviceProcAddr(device, "vkCmdTraceRaysKHR"));
|
|
vkGetRayTracingShaderGroupHandlesKHR = reinterpret_cast<PFN_vkGetRayTracingShaderGroupHandlesKHR>(vkGetDeviceProcAddr(device, "vkGetRayTracingShaderGroupHandlesKHR"));
|
|
vkCreateRayTracingPipelinesKHR = reinterpret_cast<PFN_vkCreateRayTracingPipelinesKHR>(vkGetDeviceProcAddr(device, "vkCreateRayTracingPipelinesKHR"));
|
|
|
|
// Create the acceleration structures used to render the ray traced scene
|
|
createBottomLevelAccelerationStructure();
|
|
createTopLevelAccelerationStructure();
|
|
|
|
createStorageImage();
|
|
createUniformBuffer();
|
|
createRayTracingPipeline();
|
|
createShaderBindingTable();
|
|
createDescriptorSets();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
if (camera.updated)
|
|
updateUniformBuffers();
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|