479 lines
22 KiB
C++
479 lines
22 KiB
C++
/*
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* Vulkan Example - Using ray queries for hardware accelerated ray tracing queries in a fragment shader
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*
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* Copyright (C) 2020-2022 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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#include "VulkanglTFModel.h"
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#include "VulkanRaytracingSample.h"
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#define ENABLE_VALIDATION false
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class VulkanExample : public VulkanRaytracingSample
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{
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public:
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glm::vec3 lightPos = glm::vec3();
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struct UniformData {
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glm::mat4 projection;
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glm::mat4 view;
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glm::mat4 model;
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glm::vec3 lightPos;
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} uniformData;
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vks::Buffer ubo;
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vkglTF::Model scene;
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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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VulkanRaytracingSample::AccelerationStructure bottomLevelAS{};
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VulkanRaytracingSample::AccelerationStructure topLevelAS{};
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VkPhysicalDeviceRayQueryFeaturesKHR enabledRayQueryFeatures{};
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VulkanExample() : VulkanRaytracingSample()
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{
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title = "Ray queries for ray traced shadows";
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camera.type = Camera::CameraType::lookat;
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timerSpeed *= 0.25f;
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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, 3.0f, -10.0f));
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rayQueryOnly = true;
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enableExtensions();
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enabledDeviceExtensions.push_back(VK_KHR_RAY_QUERY_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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ubo.destroy();
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deleteAccelerationStructure(bottomLevelAS);
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deleteAccelerationStructure(topLevelAS);
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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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VkDeviceOrHostAddressConstKHR vertexBufferDeviceAddress{};
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VkDeviceOrHostAddressConstKHR indexBufferDeviceAddress{};
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vertexBufferDeviceAddress.deviceAddress = getBufferDeviceAddress(scene.vertices.buffer);
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indexBufferDeviceAddress.deviceAddress = getBufferDeviceAddress(scene.indices.buffer);
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uint32_t numTriangles = static_cast<uint32_t>(scene.indices.count) / 3;
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uint32_t maxVertex = scene.vertices.count;
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// Build
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VkAccelerationStructureGeometryKHR accelerationStructureGeometry = vks::initializers::accelerationStructureGeometryKHR();
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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 = maxVertex;
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accelerationStructureGeometry.geometry.triangles.vertexStride = sizeof(vkglTF::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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// Get size info
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VkAccelerationStructureBuildGeometryInfoKHR accelerationStructureBuildGeometryInfo = vks::initializers::accelerationStructureBuildGeometryInfoKHR();
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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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VkAccelerationStructureBuildSizesInfoKHR accelerationStructureBuildSizesInfo = vks::initializers::accelerationStructureBuildSizesInfoKHR();
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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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createAccelerationStructure(bottomLevelAS, VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR, accelerationStructureBuildSizesInfo);
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// Create a small scratch buffer used during build of the bottom level acceleration structure
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ScratchBuffer scratchBuffer = createScratchBuffer(accelerationStructureBuildSizesInfo.buildScratchSize);
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VkAccelerationStructureBuildGeometryInfoKHR accelerationBuildGeometryInfo = vks::initializers::accelerationStructureBuildGeometryInfoKHR();
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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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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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*/
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void createTopLevelAccelerationStructure()
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{
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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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VkAccelerationStructureInstanceKHR instance{};
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instance.transform = transformMatrix;
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instance.instanceCustomIndex = 0;
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instance.mask = 0xFF;
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instance.instanceShaderBindingTableRecordOffset = 0;
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instance.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
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instance.accelerationStructureReference = bottomLevelAS.deviceAddress;
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// Buffer for instance data
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vks::Buffer instancesBuffer;
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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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&instancesBuffer,
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sizeof(VkAccelerationStructureInstanceKHR),
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&instance));
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VkDeviceOrHostAddressConstKHR instanceDataDeviceAddress{};
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instanceDataDeviceAddress.deviceAddress = getBufferDeviceAddress(instancesBuffer.buffer);
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VkAccelerationStructureGeometryKHR accelerationStructureGeometry = vks::initializers::accelerationStructureGeometryKHR();
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accelerationStructureGeometry.geometryType = VK_GEOMETRY_TYPE_INSTANCES_KHR;
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accelerationStructureGeometry.flags = VK_GEOMETRY_OPAQUE_BIT_KHR;
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accelerationStructureGeometry.geometry.instances.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR;
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accelerationStructureGeometry.geometry.instances.arrayOfPointers = VK_FALSE;
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accelerationStructureGeometry.geometry.instances.data = instanceDataDeviceAddress;
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// Get size info
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VkAccelerationStructureBuildGeometryInfoKHR accelerationStructureBuildGeometryInfo = vks::initializers::accelerationStructureBuildGeometryInfoKHR();
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accelerationStructureBuildGeometryInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_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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uint32_t primitive_count = 1;
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VkAccelerationStructureBuildSizesInfoKHR accelerationStructureBuildSizesInfo = vks::initializers::accelerationStructureBuildSizesInfoKHR();
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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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&primitive_count,
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&accelerationStructureBuildSizesInfo);
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createAccelerationStructure(topLevelAS, VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR, accelerationStructureBuildSizesInfo);
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// Create a small scratch buffer used during build of the top level acceleration structure
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ScratchBuffer scratchBuffer = createScratchBuffer(accelerationStructureBuildSizesInfo.buildScratchSize);
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VkAccelerationStructureBuildGeometryInfoKHR accelerationBuildGeometryInfo = vks::initializers::accelerationStructureBuildGeometryInfoKHR();
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accelerationBuildGeometryInfo.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_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 = topLevelAS.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 = 1;
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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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deleteScratchBuffer(scratchBuffer);
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instancesBuffer.destroy();
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}
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void buildCommandBuffers()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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VkViewport viewport;
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VkRect2D scissor;
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for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
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{
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VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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/*
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Note: Explicit synchronization is not required between the render pass, as this is done implicit via sub pass dependencies
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*/
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/*
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Second pass: Scene rendering with applied shadow map
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*/
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clearValues[0].color = { { 0.0f, 0.0f, 0.2f, 1.0f } };;
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clearValues[1].depthStencil = { 1.0f, 0 };
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VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
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renderPassBeginInfo.renderPass = renderPass;
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renderPassBeginInfo.framebuffer = frameBuffers[i];
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renderPassBeginInfo.renderArea.extent.width = width;
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renderPassBeginInfo.renderArea.extent.height = height;
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renderPassBeginInfo.clearValueCount = 2;
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renderPassBeginInfo.pClearValues = clearValues;
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
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scissor = vks::initializers::rect2D(width, height, 0, 0);
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vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
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// 3D scene
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
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scene.draw(drawCmdBuffers[i]);
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VulkanExampleBase::drawUI(drawCmdBuffers[i]);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void loadAssets()
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{
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vkglTF::memoryPropertyFlags = VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT;
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const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
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scene.loadFromFile(getAssetPath() + "models/vulkanscene_shadow.gltf", vulkanDevice, queue, glTFLoadingFlags);
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}
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void setupDescriptorPool()
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{
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std::vector<VkDescriptorPoolSize> poolSizes = {
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR, 1)
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 1);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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}
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void setupDescriptorSetLayout()
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{
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// Shared pipeline layout for all pipelines used in this sample
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
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// Binding 0 : Vertex shader uniform buffer
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
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// Binding 1 : Fragment shader image sampler (shadow map)
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 1),
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// Binding 2: Acceleration structure
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR, VK_SHADER_STAGE_FRAGMENT_BIT, 2),
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};
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VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
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VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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}
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void setupDescriptorSets()
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{
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std::vector<VkWriteDescriptorSet> writeDescriptorSets;
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// Debug display
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VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
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vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, nullptr);
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// Scene rendering with shadow map applied
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
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writeDescriptorSets = {
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// Binding 0 : Vertex shader uniform buffer
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vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &ubo.descriptor)
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};
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VkWriteDescriptorSetAccelerationStructureKHR descriptorAccelerationStructureInfo = vks::initializers::writeDescriptorSetAccelerationStructureKHR();
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descriptorAccelerationStructureInfo.accelerationStructureCount = 1;
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descriptorAccelerationStructureInfo.pAccelerationStructures = &topLevelAS.handle;
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VkWriteDescriptorSet accelerationStructureWrite{};
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accelerationStructureWrite.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
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// The specialized acceleration structure descriptor has to be chained
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accelerationStructureWrite.pNext = &descriptorAccelerationStructureInfo;
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accelerationStructureWrite.dstSet = descriptorSet;
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accelerationStructureWrite.dstBinding = 2;
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accelerationStructureWrite.descriptorCount = 1;
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accelerationStructureWrite.descriptorType = VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR;
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writeDescriptorSets.push_back(accelerationStructureWrite);
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vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, nullptr);
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}
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void preparePipelines()
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{
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyStateCI = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationStateCI = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
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VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendStateCI = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilStateCI = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportStateCI = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
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VkPipelineMultisampleStateCreateInfo multisampleStateCI = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
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std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
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VkPipelineDynamicStateCreateInfo dynamicStateCI = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables.data(), dynamicStateEnables.size(), 0);
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std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
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VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass, 0);
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pipelineCI.pInputAssemblyState = &inputAssemblyStateCI;
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pipelineCI.pRasterizationState = &rasterizationStateCI;
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pipelineCI.pColorBlendState = &colorBlendStateCI;
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pipelineCI.pMultisampleState = &multisampleStateCI;
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pipelineCI.pViewportState = &viewportStateCI;
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pipelineCI.pDepthStencilState = &depthStencilStateCI;
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pipelineCI.pDynamicState = &dynamicStateCI;
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pipelineCI.stageCount = shaderStages.size();
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pipelineCI.pStages = shaderStages.data();
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// Scene rendering with ray traced shadows applied
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pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::UV, vkglTF::VertexComponent::Color, vkglTF::VertexComponent::Normal });
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rasterizationStateCI.cullMode = VK_CULL_MODE_BACK_BIT;
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shaderStages[0] = loadShader(getShadersPath() + "rayquery/scene.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getShadersPath() + "rayquery/scene.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
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}
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|
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Scene vertex shader uniform buffer block
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&ubo,
|
|
sizeof(UniformData)));
|
|
|
|
// Map persistent
|
|
VK_CHECK_RESULT(ubo.map());
|
|
|
|
updateLight();
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
void updateLight()
|
|
{
|
|
// Animate the light source
|
|
lightPos.x = cos(glm::radians(timer * 360.0f)) * 40.0f;
|
|
lightPos.y = -50.0f + sin(glm::radians(timer * 360.0f)) * 20.0f;
|
|
lightPos.z = 25.0f + sin(glm::radians(timer * 360.0f)) * 5.0f;
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
uniformData.projection = camera.matrices.perspective;
|
|
uniformData.view = camera.matrices.view;
|
|
uniformData.model = glm::mat4(1.0f);
|
|
uniformData.lightPos = lightPos;
|
|
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;
|
|
|
|
enabledRayQueryFeatures.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_QUERY_FEATURES_KHR;
|
|
enabledRayQueryFeatures.rayQuery = VK_TRUE;
|
|
enabledRayQueryFeatures.pNext = &enabledAccelerationStructureFeatures;
|
|
|
|
deviceCreatepNextChain = &enabledRayQueryFeatures;
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
|
|
// Command buffer to be submitted 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()
|
|
{
|
|
VulkanRaytracingSample::prepare();
|
|
loadAssets();
|
|
prepareUniformBuffers();
|
|
setupDescriptorSetLayout();
|
|
preparePipelines();
|
|
createBottomLevelAccelerationStructure();
|
|
createTopLevelAccelerationStructure();
|
|
setupDescriptorPool();
|
|
setupDescriptorSets();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
if (!paused || camera.updated)
|
|
{
|
|
updateLight();
|
|
updateUniformBuffers();
|
|
}
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|