119 lines
No EOL
5.5 KiB
C++
119 lines
No EOL
5.5 KiB
C++
/*
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Crafter®.Graphics
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Copyright (C) 2026 Catcrafts®
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Catcrafts.net
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 3.0 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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module;
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#include <vulkan/vulkan_core.h>
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module Crafter.Graphics:RenderingElement3DVulkan_impl;
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import :RenderingElement3DVulkan;
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import std;
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using namespace Crafter;
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std::vector<RenderingElement3DVulkan> RenderingElement3DVulkan::elements;
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RenderingElement3DVulkan::RenderingElement3DVulkan(Mesh& mesh) {
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VkAccelerationStructureDeviceAddressInfoKHR addrInfo {
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.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_DEVICE_ADDRESS_INFO_KHR,
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.accelerationStructure = mesh.accelerationStructure
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};
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VkDeviceAddress blasDeviceAddr = VulkanDevice::vkGetAccelerationStructureDeviceAddressKHR(VulkanDevice::device, &addrInfo);
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instance = {
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.instanceCustomIndex = 0,
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.mask = 0xFF,
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.instanceShaderBindingTableRecordOffset = 0,
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.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR | VK_GEOMETRY_INSTANCE_FORCE_OPAQUE_BIT_KHR,
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.accelerationStructureReference = blasDeviceAddr
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};
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}
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void RenderingElement3DVulkan::BuildTLAS(VkCommandBuffer cmd, std::uint32_t index) {
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tlases[index].instanceBuffer.Resize(VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, elements.size());
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for(std::uint32_t i = 0; i < elements.size(); i++) {
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tlases[index].instanceBuffer.value[i] = elements[i].instance;
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}
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tlases[index].instanceBuffer.FlushDevice(cmd, VK_ACCESS_MEMORY_READ_BIT, VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR);
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VkAccelerationStructureGeometryInstancesDataKHR instancesData = VkAccelerationStructureGeometryInstancesDataKHR {
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.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR,
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.arrayOfPointers = VK_FALSE,
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.data = {tlases[index].instanceBuffer.address}
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};
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VkAccelerationStructureGeometryDataKHR geometryData;
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geometryData.instances = instancesData;
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VkAccelerationStructureGeometryKHR tlasGeometry {
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.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_KHR,
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.geometryType = VK_GEOMETRY_TYPE_INSTANCES_KHR,
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.geometry = geometryData
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};
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VkAccelerationStructureBuildGeometryInfoKHR tlasBuildGeometryInfo{
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.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR,
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.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR,
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.mode = VK_BUILD_ACCELERATION_STRUCTURE_MODE_BUILD_KHR,
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.geometryCount = 1,
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.pGeometries = &tlasGeometry
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};
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// Query the memory sizes that will be needed for this TLAS
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auto primitiveCount = static_cast<uint32_t>(elements.size());
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VkAccelerationStructureBuildSizesInfoKHR tlasBuildSizes {
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.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_SIZES_INFO_KHR
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};
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VulkanDevice::vkGetAccelerationStructureBuildSizesKHR(
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VulkanDevice::device,
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VK_ACCELERATION_STRUCTURE_BUILD_TYPE_DEVICE_KHR,
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&tlasBuildGeometryInfo,
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&primitiveCount,
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&tlasBuildSizes
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);
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scratchBuffer.Resize(VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, tlasBuildSizes.buildScratchSize);
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tlasBuildGeometryInfo.scratchData.deviceAddress = scratchBuffer.address;
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tlases[index].buffer.Resize(VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_STORAGE_BIT_KHR | VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, tlasBuildSizes.accelerationStructureSize);
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// Create and store the TLAS handle
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VkAccelerationStructureCreateInfoKHR tlasCreateInfo {
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.sType = VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_KHR,
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.buffer = tlases[index].buffer.buffer,
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.offset = 0,
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.size = tlasBuildSizes.accelerationStructureSize,
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.type = VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR,
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};
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VulkanDevice::CheckVkResult(VulkanDevice::vkCreateAccelerationStructureKHR(VulkanDevice::device, &tlasCreateInfo, nullptr, &tlases[index].accelerationStructure));
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tlasBuildGeometryInfo.dstAccelerationStructure = tlases[index].accelerationStructure;
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// Prepare the build range for the TLAS
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VkAccelerationStructureBuildRangeInfoKHR tlasRangeInfo {
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.primitiveCount = primitiveCount,
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.primitiveOffset = 0,
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.firstVertex = 0,
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.transformOffset = 0
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};
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VkAccelerationStructureBuildRangeInfoKHR* tlasRangeInfoPP = &tlasRangeInfo;
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VulkanDevice::vkCmdBuildAccelerationStructuresKHR(cmd, 1, &tlasBuildGeometryInfo, &tlasRangeInfoPP);
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} |