965 lines
42 KiB
C++
965 lines
42 KiB
C++
/*
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* Copyright (c) 2014-2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* SPDX-FileCopyrightText: Copyright (c) 2014-2021 NVIDIA CORPORATION
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <sstream>
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#define STB_IMAGE_IMPLEMENTATION
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#include "obj_loader.h"
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#include "stb_image.h"
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#include "hello_vulkan.h"
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#include "nvh/alignment.hpp"
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#include "nvh/cameramanipulator.hpp"
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#include "nvh/fileoperations.hpp"
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#include "nvvk/commands_vk.hpp"
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#include "nvvk/descriptorsets_vk.hpp"
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#include "nvvk/images_vk.hpp"
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#include "nvvk/pipeline_vk.hpp"
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#include "nvvk/renderpasses_vk.hpp"
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#include "nvvk/shaders_vk.hpp"
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#include "nvvk/buffers_vk.hpp"
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extern std::vector<std::string> defaultSearchPaths;
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//--------------------------------------------------------------------------------------------------
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// Keep the handle on the device
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// Initialize the tool to do all our allocations: buffers, images
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//
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void HelloVulkan::setup(const VkInstance& instance, const VkDevice& device, const VkPhysicalDevice& physicalDevice, uint32_t queueFamily)
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{
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AppBaseVk::setup(instance, device, physicalDevice, queueFamily);
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m_alloc.init(instance, device, physicalDevice);
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m_debug.setup(m_device);
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m_offscreenDepthFormat = nvvk::findDepthFormat(physicalDevice);
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}
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//--------------------------------------------------------------------------------------------------
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// Called at each frame to update the camera matrix
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//
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void HelloVulkan::updateUniformBuffer(const VkCommandBuffer& cmdBuf)
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{
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// Prepare new UBO contents on host.
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const float aspectRatio = m_size.width / static_cast<float>(m_size.height);
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GlobalUniforms hostUBO = {};
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const auto& view = CameraManip.getMatrix();
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const auto& proj = nvmath::perspectiveVK(CameraManip.getFov(), aspectRatio, 0.1f, 1000.0f);
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// proj[1][1] *= -1; // Inverting Y for Vulkan (not needed with perspectiveVK).
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hostUBO.viewProj = proj * view;
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hostUBO.viewInverse = nvmath::invert(view);
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hostUBO.projInverse = nvmath::invert(proj);
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// UBO on the device, and what stages access it.
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VkBuffer deviceUBO = m_bGlobals.buffer;
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auto uboUsageStages = VK_PIPELINE_STAGE_VERTEX_SHADER_BIT | VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR;
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// Ensure that the modified UBO is not visible to previous frames.
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VkBufferMemoryBarrier beforeBarrier{VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER};
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beforeBarrier.srcAccessMask = VK_ACCESS_SHADER_READ_BIT;
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beforeBarrier.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
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beforeBarrier.buffer = deviceUBO;
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beforeBarrier.offset = 0;
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beforeBarrier.size = sizeof(hostUBO);
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vkCmdPipelineBarrier(cmdBuf, uboUsageStages, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_DEPENDENCY_DEVICE_GROUP_BIT, 0,
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nullptr, 1, &beforeBarrier, 0, nullptr);
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// Schedule the host-to-device upload. (hostUBO is copied into the cmd
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// buffer so it is okay to deallocate when the function returns).
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vkCmdUpdateBuffer(cmdBuf, m_bGlobals.buffer, 0, sizeof(GlobalUniforms), &hostUBO);
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// Making sure the updated UBO will be visible.
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VkBufferMemoryBarrier afterBarrier{VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER};
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afterBarrier.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
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afterBarrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
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afterBarrier.buffer = deviceUBO;
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afterBarrier.offset = 0;
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afterBarrier.size = sizeof(hostUBO);
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vkCmdPipelineBarrier(cmdBuf, VK_PIPELINE_STAGE_TRANSFER_BIT, uboUsageStages, VK_DEPENDENCY_DEVICE_GROUP_BIT, 0,
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nullptr, 1, &afterBarrier, 0, nullptr);
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}
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//--------------------------------------------------------------------------------------------------
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// Describing the layout pushed when rendering
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//
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void HelloVulkan::createDescriptorSetLayout()
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{
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auto nbTxt = static_cast<uint32_t>(m_textures.size());
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// Camera matrices
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m_descSetLayoutBind.addBinding(SceneBindings::eGlobals, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1,
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VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_RAYGEN_BIT_KHR);
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// Obj descriptions
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m_descSetLayoutBind.addBinding(SceneBindings::eObjDescs, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1,
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VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT | VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR);
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// Textures
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m_descSetLayoutBind.addBinding(SceneBindings::eTextures, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, nbTxt,
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VK_SHADER_STAGE_FRAGMENT_BIT | VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR);
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m_descSetLayout = m_descSetLayoutBind.createLayout(m_device);
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m_descPool = m_descSetLayoutBind.createPool(m_device, 1);
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m_descSet = nvvk::allocateDescriptorSet(m_device, m_descPool, m_descSetLayout);
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}
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//--------------------------------------------------------------------------------------------------
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// Setting up the buffers in the descriptor set
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//
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void HelloVulkan::updateDescriptorSet()
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{
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std::vector<VkWriteDescriptorSet> writes;
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// Camera matrices and scene description
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VkDescriptorBufferInfo dbiUnif{m_bGlobals.buffer, 0, VK_WHOLE_SIZE};
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writes.emplace_back(m_descSetLayoutBind.makeWrite(m_descSet, SceneBindings::eGlobals, &dbiUnif));
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VkDescriptorBufferInfo dbiSceneDesc{m_bObjDesc.buffer, 0, VK_WHOLE_SIZE};
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writes.emplace_back(m_descSetLayoutBind.makeWrite(m_descSet, SceneBindings::eObjDescs, &dbiSceneDesc));
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// All texture samplers
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std::vector<VkDescriptorImageInfo> diit;
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for(auto& texture : m_textures)
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{
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diit.emplace_back(texture.descriptor);
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}
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writes.emplace_back(m_descSetLayoutBind.makeWriteArray(m_descSet, SceneBindings::eTextures, diit.data()));
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// Writing the information
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vkUpdateDescriptorSets(m_device, static_cast<uint32_t>(writes.size()), writes.data(), 0, nullptr);
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}
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//--------------------------------------------------------------------------------------------------
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// Creating the pipeline layout
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//
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void HelloVulkan::createGraphicsPipeline()
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{
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VkPushConstantRange pushConstantRanges = {VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(PushConstantRaster)};
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// Creating the Pipeline Layout
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VkPipelineLayoutCreateInfo createInfo{VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO};
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createInfo.setLayoutCount = 1;
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createInfo.pSetLayouts = &m_descSetLayout;
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createInfo.pushConstantRangeCount = 1;
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createInfo.pPushConstantRanges = &pushConstantRanges;
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vkCreatePipelineLayout(m_device, &createInfo, nullptr, &m_pipelineLayout);
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// Creating the Pipeline
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std::vector<std::string> paths = defaultSearchPaths;
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nvvk::GraphicsPipelineGeneratorCombined gpb(m_device, m_pipelineLayout, m_offscreenRenderPass);
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gpb.depthStencilState.depthTestEnable = true;
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gpb.addShader(nvh::loadFile("spv/vert_shader.vert.spv", true, paths, true), VK_SHADER_STAGE_VERTEX_BIT);
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gpb.addShader(nvh::loadFile("spv/frag_shader.frag.spv", true, paths, true), VK_SHADER_STAGE_FRAGMENT_BIT);
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gpb.addBindingDescription({0, sizeof(VertexObj)});
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gpb.addAttributeDescriptions({
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{0, 0, VK_FORMAT_R32G32B32_SFLOAT, static_cast<uint32_t>(offsetof(VertexObj, pos))},
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{1, 0, VK_FORMAT_R32G32B32_SFLOAT, static_cast<uint32_t>(offsetof(VertexObj, nrm))},
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{2, 0, VK_FORMAT_R32G32B32_SFLOAT, static_cast<uint32_t>(offsetof(VertexObj, color))},
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{3, 0, VK_FORMAT_R32G32_SFLOAT, static_cast<uint32_t>(offsetof(VertexObj, texCoord))},
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});
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m_graphicsPipeline = gpb.createPipeline();
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m_debug.setObjectName(m_graphicsPipeline, "Graphics");
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}
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//--------------------------------------------------------------------------------------------------
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// Loading the OBJ file and setting up all buffers
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//
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void HelloVulkan::loadModel(const std::string& filename, nvmath::mat4f transform)
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{
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LOGI("Loading File: %s \n", filename.c_str());
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ObjLoader loader;
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loader.loadModel(filename);
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// Converting from Srgb to linear
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for(auto& m : loader.m_materials)
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{
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m.ambient = nvmath::pow(m.ambient, 2.2f);
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m.diffuse = nvmath::pow(m.diffuse, 2.2f);
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m.specular = nvmath::pow(m.specular, 2.2f);
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}
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ObjModel model;
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model.nbIndices = static_cast<uint32_t>(loader.m_indices.size());
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model.nbVertices = static_cast<uint32_t>(loader.m_vertices.size());
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// Create the buffers on Device and copy vertices, indices and materials
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nvvk::CommandPool cmdBufGet(m_device, m_graphicsQueueIndex);
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VkCommandBuffer cmdBuf = cmdBufGet.createCommandBuffer();
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VkBufferUsageFlags flag = VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT;
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VkBufferUsageFlags rayTracingFlags = // used also for building acceleration structures
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flag | VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT;
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model.vertexBuffer = m_alloc.createBuffer(cmdBuf, loader.m_vertices, VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | rayTracingFlags);
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model.indexBuffer = m_alloc.createBuffer(cmdBuf, loader.m_indices, VK_BUFFER_USAGE_INDEX_BUFFER_BIT | rayTracingFlags);
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model.matColorBuffer = m_alloc.createBuffer(cmdBuf, loader.m_materials, VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | flag);
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model.matIndexBuffer = m_alloc.createBuffer(cmdBuf, loader.m_matIndx, VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | flag);
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// Creates all textures found and find the offset for this model
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auto txtOffset = static_cast<uint32_t>(m_textures.size());
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createTextureImages(cmdBuf, loader.m_textures);
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cmdBufGet.submitAndWait(cmdBuf);
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m_alloc.finalizeAndReleaseStaging();
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std::string objNb = std::to_string(m_objModel.size());
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m_debug.setObjectName(model.vertexBuffer.buffer, (std::string("vertex_" + objNb)));
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m_debug.setObjectName(model.indexBuffer.buffer, (std::string("index_" + objNb)));
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m_debug.setObjectName(model.matColorBuffer.buffer, (std::string("mat_" + objNb)));
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m_debug.setObjectName(model.matIndexBuffer.buffer, (std::string("matIdx_" + objNb)));
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// Keeping transformation matrix of the instance
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ObjInstance instance;
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instance.transform = transform;
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instance.objIndex = static_cast<uint32_t>(m_objModel.size());
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m_instances.push_back(instance);
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// Creating information for device access
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ObjDesc desc;
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desc.txtOffset = txtOffset;
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desc.vertexAddress = nvvk::getBufferDeviceAddress(m_device, model.vertexBuffer.buffer);
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desc.indexAddress = nvvk::getBufferDeviceAddress(m_device, model.indexBuffer.buffer);
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desc.materialAddress = nvvk::getBufferDeviceAddress(m_device, model.matColorBuffer.buffer);
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desc.materialIndexAddress = nvvk::getBufferDeviceAddress(m_device, model.matIndexBuffer.buffer);
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// Keeping the obj host model and device description
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m_objModel.emplace_back(model);
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m_objDesc.emplace_back(desc);
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}
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//--------------------------------------------------------------------------------------------------
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// Creating the uniform buffer holding the camera matrices
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// - Buffer is host visible
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//
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void HelloVulkan::createUniformBuffer()
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{
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m_bGlobals = m_alloc.createBuffer(sizeof(GlobalUniforms), VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
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VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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m_debug.setObjectName(m_bGlobals.buffer, "Globals");
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}
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//--------------------------------------------------------------------------------------------------
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// Create a storage buffer containing the description of the scene elements
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// - Which geometry is used by which instance
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// - Transformation
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// - Offset for texture
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//
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void HelloVulkan::createObjDescriptionBuffer()
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{
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nvvk::CommandPool cmdGen(m_device, m_graphicsQueueIndex);
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auto cmdBuf = cmdGen.createCommandBuffer();
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m_bObjDesc = m_alloc.createBuffer(cmdBuf, m_objDesc, VK_BUFFER_USAGE_STORAGE_BUFFER_BIT);
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cmdGen.submitAndWait(cmdBuf);
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m_alloc.finalizeAndReleaseStaging();
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m_debug.setObjectName(m_bObjDesc.buffer, "ObjDescs");
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}
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//--------------------------------------------------------------------------------------------------
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// Creating all textures and samplers
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//
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void HelloVulkan::createTextureImages(const VkCommandBuffer& cmdBuf, const std::vector<std::string>& textures)
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{
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VkSamplerCreateInfo samplerCreateInfo{VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO};
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samplerCreateInfo.minFilter = VK_FILTER_LINEAR;
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samplerCreateInfo.magFilter = VK_FILTER_LINEAR;
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samplerCreateInfo.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
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samplerCreateInfo.maxLod = FLT_MAX;
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VkFormat format = VK_FORMAT_R8G8B8A8_SRGB;
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// If no textures are present, create a dummy one to accommodate the pipeline layout
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if(textures.empty() && m_textures.empty())
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{
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nvvk::Texture texture;
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std::array<uint8_t, 4> color{255u, 255u, 255u, 255u};
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VkDeviceSize bufferSize = sizeof(color);
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auto imgSize = VkExtent2D{1, 1};
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auto imageCreateInfo = nvvk::makeImage2DCreateInfo(imgSize, format);
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// Creating the dummy texture
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nvvk::Image image = m_alloc.createImage(cmdBuf, bufferSize, color.data(), imageCreateInfo);
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VkImageViewCreateInfo ivInfo = nvvk::makeImageViewCreateInfo(image.image, imageCreateInfo);
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texture = m_alloc.createTexture(image, ivInfo, samplerCreateInfo);
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// The image format must be in VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL
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nvvk::cmdBarrierImageLayout(cmdBuf, texture.image, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
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m_textures.push_back(texture);
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}
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else
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{
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// Uploading all images
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for(const auto& texture : textures)
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{
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std::stringstream o;
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int texWidth, texHeight, texChannels;
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o << "media/textures/" << texture;
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std::string txtFile = nvh::findFile(o.str(), defaultSearchPaths, true);
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stbi_uc* stbi_pixels = stbi_load(txtFile.c_str(), &texWidth, &texHeight, &texChannels, STBI_rgb_alpha);
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std::array<stbi_uc, 4> color{255u, 0u, 255u, 255u};
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stbi_uc* pixels = stbi_pixels;
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// Handle failure
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if(!stbi_pixels)
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{
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texWidth = texHeight = 1;
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texChannels = 4;
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pixels = reinterpret_cast<stbi_uc*>(color.data());
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}
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VkDeviceSize bufferSize = static_cast<uint64_t>(texWidth) * texHeight * sizeof(uint8_t) * 4;
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auto imgSize = VkExtent2D{(uint32_t)texWidth, (uint32_t)texHeight};
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auto imageCreateInfo = nvvk::makeImage2DCreateInfo(imgSize, format, VK_IMAGE_USAGE_SAMPLED_BIT, true);
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{
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nvvk::Image image = m_alloc.createImage(cmdBuf, bufferSize, pixels, imageCreateInfo);
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nvvk::cmdGenerateMipmaps(cmdBuf, image.image, format, imgSize, imageCreateInfo.mipLevels);
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VkImageViewCreateInfo ivInfo = nvvk::makeImageViewCreateInfo(image.image, imageCreateInfo);
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nvvk::Texture texture = m_alloc.createTexture(image, ivInfo, samplerCreateInfo);
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m_textures.push_back(texture);
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}
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stbi_image_free(stbi_pixels);
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}
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}
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}
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//--------------------------------------------------------------------------------------------------
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// Destroying all allocations
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//
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void HelloVulkan::destroyResources()
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{
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vkDestroyPipeline(m_device, m_graphicsPipeline, nullptr);
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vkDestroyPipelineLayout(m_device, m_pipelineLayout, nullptr);
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vkDestroyDescriptorPool(m_device, m_descPool, nullptr);
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vkDestroyDescriptorSetLayout(m_device, m_descSetLayout, nullptr);
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m_alloc.destroy(m_bGlobals);
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m_alloc.destroy(m_bObjDesc);
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for(auto& m : m_objModel)
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{
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m_alloc.destroy(m.vertexBuffer);
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m_alloc.destroy(m.indexBuffer);
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m_alloc.destroy(m.matColorBuffer);
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m_alloc.destroy(m.matIndexBuffer);
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}
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for(auto& t : m_textures)
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{
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m_alloc.destroy(t);
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}
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//#Post
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m_alloc.destroy(m_offscreenColor);
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m_alloc.destroy(m_offscreenDepth);
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vkDestroyPipeline(m_device, m_postPipeline, nullptr);
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vkDestroyPipelineLayout(m_device, m_postPipelineLayout, nullptr);
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vkDestroyDescriptorPool(m_device, m_postDescPool, nullptr);
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vkDestroyDescriptorSetLayout(m_device, m_postDescSetLayout, nullptr);
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vkDestroyRenderPass(m_device, m_offscreenRenderPass, nullptr);
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vkDestroyFramebuffer(m_device, m_offscreenFramebuffer, nullptr);
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// #VKRay
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m_rtBuilder.destroy();
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m_sbtWrapper.destroy();
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vkDestroyPipeline(m_device, m_rtPipeline, nullptr);
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vkDestroyPipelineLayout(m_device, m_rtPipelineLayout, nullptr);
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vkDestroyDescriptorPool(m_device, m_rtDescPool, nullptr);
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vkDestroyDescriptorSetLayout(m_device, m_rtDescSetLayout, nullptr);
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// #VK_compute
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vkDestroyPipeline(m_device, m_compPipeline, nullptr);
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vkDestroyPipelineLayout(m_device, m_compPipelineLayout, nullptr);
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vkDestroyDescriptorPool(m_device, m_compDescPool, nullptr);
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vkDestroyDescriptorSetLayout(m_device, m_compDescSetLayout, nullptr);
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m_alloc.deinit();
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}
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//--------------------------------------------------------------------------------------------------
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// Drawing the scene in raster mode
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//
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void HelloVulkan::rasterize(const VkCommandBuffer& cmdBuf)
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{
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VkDeviceSize offset{0};
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m_debug.beginLabel(cmdBuf, "Rasterize");
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// Dynamic Viewport
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setViewport(cmdBuf);
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|
|
|
// Drawing all triangles
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, m_graphicsPipeline);
|
|
vkCmdBindDescriptorSets(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, m_pipelineLayout, 0, 1, &m_descSet, 0, nullptr);
|
|
|
|
|
|
for(const HelloVulkan::ObjInstance& inst : m_instances)
|
|
{
|
|
auto& model = m_objModel[inst.objIndex];
|
|
m_pcRaster.objIndex = inst.objIndex; // Telling which object is drawn
|
|
m_pcRaster.modelMatrix = inst.transform;
|
|
|
|
vkCmdPushConstants(cmdBuf, m_pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0,
|
|
sizeof(PushConstantRaster), &m_pcRaster);
|
|
vkCmdBindVertexBuffers(cmdBuf, 0, 1, &model.vertexBuffer.buffer, &offset);
|
|
vkCmdBindIndexBuffer(cmdBuf, model.indexBuffer.buffer, 0, VK_INDEX_TYPE_UINT32);
|
|
vkCmdDrawIndexed(cmdBuf, model.nbIndices, 1, 0, 0, 0);
|
|
}
|
|
m_debug.endLabel(cmdBuf);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Handling resize of the window
|
|
//
|
|
void HelloVulkan::onResize(int /*w*/, int /*h*/)
|
|
{
|
|
createOffscreenRender();
|
|
updatePostDescriptorSet();
|
|
updateRtDescriptorSet();
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Post-processing
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Creating an offscreen frame buffer and the associated render pass
|
|
//
|
|
void HelloVulkan::createOffscreenRender()
|
|
{
|
|
m_alloc.destroy(m_offscreenColor);
|
|
m_alloc.destroy(m_offscreenDepth);
|
|
|
|
// Creating the color image
|
|
{
|
|
auto colorCreateInfo = nvvk::makeImage2DCreateInfo(m_size, m_offscreenColorFormat,
|
|
VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT
|
|
| VK_IMAGE_USAGE_STORAGE_BIT);
|
|
|
|
|
|
nvvk::Image image = m_alloc.createImage(colorCreateInfo);
|
|
VkImageViewCreateInfo ivInfo = nvvk::makeImageViewCreateInfo(image.image, colorCreateInfo);
|
|
VkSamplerCreateInfo sampler{VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO};
|
|
m_offscreenColor = m_alloc.createTexture(image, ivInfo, sampler);
|
|
m_offscreenColor.descriptor.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
|
|
}
|
|
|
|
// Creating the depth buffer
|
|
auto depthCreateInfo = nvvk::makeImage2DCreateInfo(m_size, m_offscreenDepthFormat, VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT);
|
|
{
|
|
nvvk::Image image = m_alloc.createImage(depthCreateInfo);
|
|
|
|
|
|
VkImageViewCreateInfo depthStencilView{VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO};
|
|
depthStencilView.viewType = VK_IMAGE_VIEW_TYPE_2D;
|
|
depthStencilView.format = m_offscreenDepthFormat;
|
|
depthStencilView.subresourceRange = {VK_IMAGE_ASPECT_DEPTH_BIT, 0, 1, 0, 1};
|
|
depthStencilView.image = image.image;
|
|
|
|
m_offscreenDepth = m_alloc.createTexture(image, depthStencilView);
|
|
}
|
|
|
|
// Setting the image layout for both color and depth
|
|
{
|
|
nvvk::CommandPool genCmdBuf(m_device, m_graphicsQueueIndex);
|
|
auto cmdBuf = genCmdBuf.createCommandBuffer();
|
|
nvvk::cmdBarrierImageLayout(cmdBuf, m_offscreenColor.image, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_GENERAL);
|
|
nvvk::cmdBarrierImageLayout(cmdBuf, m_offscreenDepth.image, VK_IMAGE_LAYOUT_UNDEFINED,
|
|
VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL, VK_IMAGE_ASPECT_DEPTH_BIT);
|
|
|
|
genCmdBuf.submitAndWait(cmdBuf);
|
|
}
|
|
|
|
// Creating a renderpass for the offscreen
|
|
if(!m_offscreenRenderPass)
|
|
{
|
|
m_offscreenRenderPass = nvvk::createRenderPass(m_device, {m_offscreenColorFormat}, m_offscreenDepthFormat, 1, true,
|
|
true, VK_IMAGE_LAYOUT_GENERAL, VK_IMAGE_LAYOUT_GENERAL);
|
|
}
|
|
|
|
|
|
// Creating the frame buffer for offscreen
|
|
std::vector<VkImageView> attachments = {m_offscreenColor.descriptor.imageView, m_offscreenDepth.descriptor.imageView};
|
|
|
|
vkDestroyFramebuffer(m_device, m_offscreenFramebuffer, nullptr);
|
|
VkFramebufferCreateInfo info{VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO};
|
|
info.renderPass = m_offscreenRenderPass;
|
|
info.attachmentCount = 2;
|
|
info.pAttachments = attachments.data();
|
|
info.width = m_size.width;
|
|
info.height = m_size.height;
|
|
info.layers = 1;
|
|
vkCreateFramebuffer(m_device, &info, nullptr, &m_offscreenFramebuffer);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// The pipeline is how things are rendered, which shaders, type of primitives, depth test and more
|
|
//
|
|
void HelloVulkan::createPostPipeline()
|
|
{
|
|
// Push constants in the fragment shader
|
|
VkPushConstantRange pushConstantRanges = {VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(float)};
|
|
|
|
// Creating the pipeline layout
|
|
VkPipelineLayoutCreateInfo createInfo{VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO};
|
|
createInfo.setLayoutCount = 1;
|
|
createInfo.pSetLayouts = &m_postDescSetLayout;
|
|
createInfo.pushConstantRangeCount = 1;
|
|
createInfo.pPushConstantRanges = &pushConstantRanges;
|
|
vkCreatePipelineLayout(m_device, &createInfo, nullptr, &m_postPipelineLayout);
|
|
|
|
|
|
// Pipeline: completely generic, no vertices
|
|
nvvk::GraphicsPipelineGeneratorCombined pipelineGenerator(m_device, m_postPipelineLayout, m_renderPass);
|
|
pipelineGenerator.addShader(nvh::loadFile("spv/passthrough.vert.spv", true, defaultSearchPaths, true), VK_SHADER_STAGE_VERTEX_BIT);
|
|
pipelineGenerator.addShader(nvh::loadFile("spv/post.frag.spv", true, defaultSearchPaths, true), VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
pipelineGenerator.rasterizationState.cullMode = VK_CULL_MODE_NONE;
|
|
m_postPipeline = pipelineGenerator.createPipeline();
|
|
m_debug.setObjectName(m_postPipeline, "post");
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// The descriptor layout is the description of the data that is passed to the vertex or the
|
|
// fragment program.
|
|
//
|
|
void HelloVulkan::createPostDescriptor()
|
|
{
|
|
m_postDescSetLayoutBind.addBinding(0, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
m_postDescSetLayout = m_postDescSetLayoutBind.createLayout(m_device);
|
|
m_postDescPool = m_postDescSetLayoutBind.createPool(m_device);
|
|
m_postDescSet = nvvk::allocateDescriptorSet(m_device, m_postDescPool, m_postDescSetLayout);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Update the output
|
|
//
|
|
void HelloVulkan::updatePostDescriptorSet()
|
|
{
|
|
VkWriteDescriptorSet writeDescriptorSets = m_postDescSetLayoutBind.makeWrite(m_postDescSet, 0, &m_offscreenColor.descriptor);
|
|
vkUpdateDescriptorSets(m_device, 1, &writeDescriptorSets, 0, nullptr);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Draw a full screen quad with the attached image
|
|
//
|
|
void HelloVulkan::drawPost(VkCommandBuffer cmdBuf)
|
|
{
|
|
m_debug.beginLabel(cmdBuf, "Post");
|
|
|
|
setViewport(cmdBuf);
|
|
|
|
auto aspectRatio = static_cast<float>(m_size.width) / static_cast<float>(m_size.height);
|
|
vkCmdPushConstants(cmdBuf, m_postPipelineLayout, VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(float), &aspectRatio);
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, m_postPipeline);
|
|
vkCmdBindDescriptorSets(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, m_postPipelineLayout, 0, 1, &m_postDescSet, 0, nullptr);
|
|
vkCmdDraw(cmdBuf, 3, 1, 0, 0);
|
|
|
|
m_debug.endLabel(cmdBuf);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Initialize Vulkan ray tracing
|
|
// #VKRay
|
|
void HelloVulkan::initRayTracing()
|
|
{
|
|
// Requesting ray tracing properties
|
|
VkPhysicalDeviceProperties2 prop2{VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2};
|
|
prop2.pNext = &m_rtProperties;
|
|
vkGetPhysicalDeviceProperties2(m_physicalDevice, &prop2);
|
|
|
|
m_rtBuilder.setup(m_device, &m_alloc, m_graphicsQueueIndex);
|
|
m_sbtWrapper.setup(m_device, m_graphicsQueueIndex, &m_alloc, m_rtProperties);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Convert an OBJ model into the ray tracing geometry used to build the BLAS
|
|
//
|
|
auto HelloVulkan::objectToVkGeometryKHR(const ObjModel& model)
|
|
{
|
|
// BLAS builder requires raw device addresses.
|
|
VkDeviceAddress vertexAddress = nvvk::getBufferDeviceAddress(m_device, model.vertexBuffer.buffer);
|
|
VkDeviceAddress indexAddress = nvvk::getBufferDeviceAddress(m_device, model.indexBuffer.buffer);
|
|
|
|
uint32_t maxPrimitiveCount = model.nbIndices / 3;
|
|
|
|
// Describe buffer as array of VertexObj.
|
|
VkAccelerationStructureGeometryTrianglesDataKHR triangles{VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_TRIANGLES_DATA_KHR};
|
|
triangles.vertexFormat = VK_FORMAT_R32G32B32_SFLOAT; // vec3 vertex position data.
|
|
triangles.vertexData.deviceAddress = vertexAddress;
|
|
triangles.vertexStride = sizeof(VertexObj);
|
|
// Describe index data (32-bit unsigned int)
|
|
triangles.indexType = VK_INDEX_TYPE_UINT32;
|
|
triangles.indexData.deviceAddress = indexAddress;
|
|
// Indicate identity transform by setting transformData to null device pointer.
|
|
//triangles.transformData = {};
|
|
triangles.maxVertex = model.nbVertices;
|
|
|
|
// Identify the above data as containing opaque triangles.
|
|
VkAccelerationStructureGeometryKHR asGeom{VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_KHR};
|
|
asGeom.geometryType = VK_GEOMETRY_TYPE_TRIANGLES_KHR;
|
|
asGeom.flags = VK_GEOMETRY_OPAQUE_BIT_KHR;
|
|
asGeom.geometry.triangles = triangles;
|
|
|
|
// The entire array will be used to build the BLAS.
|
|
VkAccelerationStructureBuildRangeInfoKHR offset;
|
|
offset.firstVertex = 0;
|
|
offset.primitiveCount = maxPrimitiveCount;
|
|
offset.primitiveOffset = 0;
|
|
offset.transformOffset = 0;
|
|
|
|
// Our blas is made from only one geometry, but could be made of many geometries
|
|
nvvk::RaytracingBuilderKHR::BlasInput input;
|
|
input.asGeometry.emplace_back(asGeom);
|
|
input.asBuildOffsetInfo.emplace_back(offset);
|
|
|
|
return input;
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
//
|
|
//
|
|
void HelloVulkan::createBottomLevelAS()
|
|
{
|
|
// BLAS - Storing each primitive in a geometry
|
|
m_blas.reserve(m_objModel.size());
|
|
for(const auto& obj : m_objModel)
|
|
{
|
|
auto blas = objectToVkGeometryKHR(obj);
|
|
|
|
// We could add more geometry in each BLAS, but we add only one for now
|
|
m_blas.push_back(blas);
|
|
}
|
|
m_rtBuilder.buildBlas(m_blas, VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR
|
|
| VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
//
|
|
//
|
|
void HelloVulkan::createTopLevelAS()
|
|
{
|
|
for(const HelloVulkan::ObjInstance& inst : m_instances)
|
|
{
|
|
VkAccelerationStructureInstanceKHR rayInst{};
|
|
rayInst.transform = nvvk::toTransformMatrixKHR(inst.transform); // Position of the instance
|
|
rayInst.instanceCustomIndex = inst.objIndex; // gl_InstanceCustomIndexEXT
|
|
rayInst.accelerationStructureReference = m_rtBuilder.getBlasDeviceAddress(inst.objIndex);
|
|
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
|
|
rayInst.mask = 0xFF; // Only be hit if rayMask & instance.mask != 0
|
|
rayInst.instanceShaderBindingTableRecordOffset = 0; // We will use the same hit group for all objects
|
|
m_tlas.emplace_back(rayInst);
|
|
}
|
|
|
|
m_rtFlags = VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR | VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR;
|
|
m_rtBuilder.buildTlas(m_tlas, m_rtFlags);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// This descriptor set holds the Acceleration structure and the output image
|
|
//
|
|
void HelloVulkan::createRtDescriptorSet()
|
|
{
|
|
// Top-level acceleration structure, usable by both the ray generation and the closest hit (to
|
|
// shoot shadow rays)
|
|
m_rtDescSetLayoutBind.addBinding(RtxBindings::eTlas, VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR, 1,
|
|
VK_SHADER_STAGE_RAYGEN_BIT_KHR | VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR); // TLAS
|
|
m_rtDescSetLayoutBind.addBinding(RtxBindings::eOutImage, VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1,
|
|
VK_SHADER_STAGE_RAYGEN_BIT_KHR); // Output image
|
|
|
|
m_rtDescPool = m_rtDescSetLayoutBind.createPool(m_device);
|
|
m_rtDescSetLayout = m_rtDescSetLayoutBind.createLayout(m_device);
|
|
|
|
VkDescriptorSetAllocateInfo allocateInfo{VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO};
|
|
allocateInfo.descriptorPool = m_rtDescPool;
|
|
allocateInfo.descriptorSetCount = 1;
|
|
allocateInfo.pSetLayouts = &m_rtDescSetLayout;
|
|
vkAllocateDescriptorSets(m_device, &allocateInfo, &m_rtDescSet);
|
|
|
|
|
|
VkAccelerationStructureKHR tlas = m_rtBuilder.getAccelerationStructure();
|
|
VkWriteDescriptorSetAccelerationStructureKHR descASInfo{VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_KHR};
|
|
descASInfo.accelerationStructureCount = 1;
|
|
descASInfo.pAccelerationStructures = &tlas;
|
|
VkDescriptorImageInfo imageInfo{{}, m_offscreenColor.descriptor.imageView, VK_IMAGE_LAYOUT_GENERAL};
|
|
|
|
std::vector<VkWriteDescriptorSet> writes;
|
|
writes.emplace_back(m_rtDescSetLayoutBind.makeWrite(m_rtDescSet, RtxBindings::eTlas, &descASInfo));
|
|
writes.emplace_back(m_rtDescSetLayoutBind.makeWrite(m_rtDescSet, RtxBindings::eOutImage, &imageInfo));
|
|
vkUpdateDescriptorSets(m_device, static_cast<uint32_t>(writes.size()), writes.data(), 0, nullptr);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Writes the output image to the descriptor set
|
|
// - Required when changing resolution
|
|
//
|
|
void HelloVulkan::updateRtDescriptorSet()
|
|
{
|
|
// (1) Output buffer
|
|
VkDescriptorImageInfo imageInfo{{}, m_offscreenColor.descriptor.imageView, VK_IMAGE_LAYOUT_GENERAL};
|
|
VkWriteDescriptorSet wds = m_rtDescSetLayoutBind.makeWrite(m_rtDescSet, RtxBindings::eOutImage, &imageInfo);
|
|
vkUpdateDescriptorSets(m_device, 1, &wds, 0, nullptr);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Pipeline for the ray tracer: all shaders, raygen, chit, miss
|
|
//
|
|
void HelloVulkan::createRtPipeline()
|
|
{
|
|
enum StageIndices
|
|
{
|
|
eRaygen,
|
|
eMiss,
|
|
eMiss2,
|
|
eClosestHit,
|
|
eShaderGroupCount
|
|
};
|
|
|
|
// All stages
|
|
std::array<VkPipelineShaderStageCreateInfo, eShaderGroupCount> stages{};
|
|
VkPipelineShaderStageCreateInfo stage{VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO};
|
|
stage.pName = "main"; // All the same entry point
|
|
// Raygen
|
|
stage.module = nvvk::createShaderModule(m_device, nvh::loadFile("spv/raytrace.rgen.spv", true, defaultSearchPaths, true));
|
|
stage.stage = VK_SHADER_STAGE_RAYGEN_BIT_KHR;
|
|
stages[eRaygen] = stage;
|
|
// Miss
|
|
stage.module = nvvk::createShaderModule(m_device, nvh::loadFile("spv/raytrace.rmiss.spv", true, defaultSearchPaths, true));
|
|
stage.stage = VK_SHADER_STAGE_MISS_BIT_KHR;
|
|
stages[eMiss] = stage;
|
|
// The second miss shader is invoked when a shadow ray misses the geometry. It simply indicates that no occlusion has been found
|
|
stage.module =
|
|
nvvk::createShaderModule(m_device, nvh::loadFile("spv/raytraceShadow.rmiss.spv", true, defaultSearchPaths, true));
|
|
stage.stage = VK_SHADER_STAGE_MISS_BIT_KHR;
|
|
stages[eMiss2] = stage;
|
|
// Hit Group - Closest Hit
|
|
stage.module = nvvk::createShaderModule(m_device, nvh::loadFile("spv/raytrace.rchit.spv", true, defaultSearchPaths, true));
|
|
stage.stage = VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR;
|
|
stages[eClosestHit] = stage;
|
|
|
|
// Shader groups
|
|
VkRayTracingShaderGroupCreateInfoKHR group{VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR};
|
|
group.anyHitShader = VK_SHADER_UNUSED_KHR;
|
|
group.closestHitShader = VK_SHADER_UNUSED_KHR;
|
|
group.generalShader = VK_SHADER_UNUSED_KHR;
|
|
group.intersectionShader = VK_SHADER_UNUSED_KHR;
|
|
|
|
// Raygen
|
|
group.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_GENERAL_KHR;
|
|
group.generalShader = eRaygen;
|
|
m_rtShaderGroups.push_back(group);
|
|
|
|
// Miss
|
|
group.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_GENERAL_KHR;
|
|
group.generalShader = eMiss;
|
|
m_rtShaderGroups.push_back(group);
|
|
|
|
// Shadow Miss
|
|
group.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_GENERAL_KHR;
|
|
group.generalShader = eMiss2;
|
|
m_rtShaderGroups.push_back(group);
|
|
|
|
// closest hit shader
|
|
group.type = VK_RAY_TRACING_SHADER_GROUP_TYPE_TRIANGLES_HIT_GROUP_KHR;
|
|
group.generalShader = VK_SHADER_UNUSED_KHR;
|
|
group.closestHitShader = eClosestHit;
|
|
m_rtShaderGroups.push_back(group);
|
|
|
|
// Push constant: we want to be able to update constants used by the shaders
|
|
VkPushConstantRange pushConstant{VK_SHADER_STAGE_RAYGEN_BIT_KHR | VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR | VK_SHADER_STAGE_MISS_BIT_KHR,
|
|
0, sizeof(PushConstantRay)};
|
|
|
|
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo{VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO};
|
|
pipelineLayoutCreateInfo.pushConstantRangeCount = 1;
|
|
pipelineLayoutCreateInfo.pPushConstantRanges = &pushConstant;
|
|
|
|
// Descriptor sets: one specific to ray tracing, and one shared with the rasterization pipeline
|
|
std::vector<VkDescriptorSetLayout> rtDescSetLayouts = {m_rtDescSetLayout, m_descSetLayout};
|
|
pipelineLayoutCreateInfo.setLayoutCount = static_cast<uint32_t>(rtDescSetLayouts.size());
|
|
pipelineLayoutCreateInfo.pSetLayouts = rtDescSetLayouts.data();
|
|
|
|
vkCreatePipelineLayout(m_device, &pipelineLayoutCreateInfo, nullptr, &m_rtPipelineLayout);
|
|
|
|
|
|
// Assemble the shader stages and recursion depth info into the ray tracing pipeline
|
|
VkRayTracingPipelineCreateInfoKHR rayPipelineInfo{VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_CREATE_INFO_KHR};
|
|
rayPipelineInfo.stageCount = static_cast<uint32_t>(stages.size()); // Stages are shaders
|
|
rayPipelineInfo.pStages = stages.data();
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|
|
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// In this case, m_rtShaderGroups.size() == 4: we have one raygen group,
|
|
// two miss shader groups, and one hit group.
|
|
rayPipelineInfo.groupCount = static_cast<uint32_t>(m_rtShaderGroups.size());
|
|
rayPipelineInfo.pGroups = m_rtShaderGroups.data();
|
|
|
|
// The ray tracing process can shoot rays from the camera, and a shadow ray can be shot from the
|
|
// hit points of the camera rays, hence a recursion level of 2. This number should be kept as low
|
|
// as possible for performance reasons. Even recursive ray tracing should be flattened into a loop
|
|
// in the ray generation to avoid deep recursion.
|
|
rayPipelineInfo.maxPipelineRayRecursionDepth = 2; // Ray depth
|
|
rayPipelineInfo.layout = m_rtPipelineLayout;
|
|
|
|
vkCreateRayTracingPipelinesKHR(m_device, {}, {}, 1, &rayPipelineInfo, nullptr, &m_rtPipeline);
|
|
|
|
|
|
m_sbtWrapper.create(m_rtPipeline, rayPipelineInfo);
|
|
|
|
for(auto& s : stages)
|
|
vkDestroyShaderModule(m_device, s.module, nullptr);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Ray Tracing the scene
|
|
//
|
|
void HelloVulkan::raytrace(const VkCommandBuffer& cmdBuf, const nvmath::vec4f& clearColor)
|
|
{
|
|
m_debug.beginLabel(cmdBuf, "Ray trace");
|
|
// Initializing push constant values
|
|
m_pcRay.clearColor = clearColor;
|
|
m_pcRay.lightPosition = m_pcRaster.lightPosition;
|
|
m_pcRay.lightIntensity = m_pcRaster.lightIntensity;
|
|
m_pcRay.lightType = m_pcRaster.lightType;
|
|
|
|
|
|
std::vector<VkDescriptorSet> descSets{m_rtDescSet, m_descSet};
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR, m_rtPipeline);
|
|
vkCmdBindDescriptorSets(cmdBuf, VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR, m_rtPipelineLayout, 0,
|
|
(uint32_t)descSets.size(), descSets.data(), 0, nullptr);
|
|
vkCmdPushConstants(cmdBuf, m_rtPipelineLayout,
|
|
VK_SHADER_STAGE_RAYGEN_BIT_KHR | VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR | VK_SHADER_STAGE_MISS_BIT_KHR,
|
|
0, sizeof(PushConstantRay), &m_pcRay);
|
|
|
|
|
|
auto& regions = m_sbtWrapper.getRegions();
|
|
vkCmdTraceRaysKHR(cmdBuf, ®ions[0], ®ions[1], ®ions[2], ®ions[3], m_size.width, m_size.height, 1);
|
|
|
|
m_debug.endLabel(cmdBuf);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// #VK_animation
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Making the Wuson running in circle
|
|
//
|
|
void HelloVulkan::animationInstances(float time)
|
|
{
|
|
const auto nbWuson = static_cast<int32_t>(m_instances.size() - 2); // All except sphere and plane
|
|
const float deltaAngle = 6.28318530718f / static_cast<float>(nbWuson);
|
|
const float wusonLength = 3.f;
|
|
const float radius = wusonLength / (2.f * sin(deltaAngle / 2.0f));
|
|
const float offset = time * 0.5f;
|
|
|
|
for(int i = 0; i < nbWuson; i++)
|
|
{
|
|
int wusonIdx = i + 1;
|
|
auto& transform = m_instances[wusonIdx].transform;
|
|
transform = nvmath::rotation_mat4_y(i * deltaAngle + offset) * nvmath::translation_mat4(radius, 0.f, 0.f);
|
|
|
|
VkAccelerationStructureInstanceKHR& tinst = m_tlas[wusonIdx];
|
|
tinst.transform = nvvk::toTransformMatrixKHR(transform);
|
|
}
|
|
|
|
// Updating the top level acceleration structure
|
|
m_rtBuilder.buildTlas(m_tlas, m_rtFlags, true);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Animating the sphere vertices using a compute shader
|
|
//
|
|
void HelloVulkan::animationObject(float time)
|
|
{
|
|
const uint32_t sphereId = 2;
|
|
ObjModel& model = m_objModel[sphereId];
|
|
|
|
updateCompDescriptors(model.vertexBuffer);
|
|
|
|
nvvk::CommandPool genCmdBuf(m_device, m_graphicsQueueIndex);
|
|
VkCommandBuffer cmdBuf = genCmdBuf.createCommandBuffer();
|
|
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_COMPUTE, m_compPipeline);
|
|
vkCmdBindDescriptorSets(cmdBuf, VK_PIPELINE_BIND_POINT_COMPUTE, m_compPipelineLayout, 0, 1, &m_compDescSet, 0, nullptr);
|
|
vkCmdPushConstants(cmdBuf, m_compPipelineLayout, VK_SHADER_STAGE_COMPUTE_BIT, 0, sizeof(float), &time);
|
|
vkCmdDispatch(cmdBuf, model.nbVertices, 1, 1);
|
|
|
|
genCmdBuf.submitAndWait(cmdBuf);
|
|
m_rtBuilder.updateBlas(sphereId, m_blas[sphereId],
|
|
VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR | VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// #VK_compute
|
|
void HelloVulkan::createCompDescriptors()
|
|
{
|
|
m_compDescSetLayoutBind.addBinding(0, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1, VK_SHADER_STAGE_COMPUTE_BIT);
|
|
|
|
m_compDescSetLayout = m_compDescSetLayoutBind.createLayout(m_device);
|
|
m_compDescPool = m_compDescSetLayoutBind.createPool(m_device, 1);
|
|
m_compDescSet = nvvk::allocateDescriptorSet(m_device, m_compDescPool, m_compDescSetLayout);
|
|
}
|
|
|
|
void HelloVulkan::updateCompDescriptors(nvvk::Buffer& vertex)
|
|
{
|
|
std::vector<VkWriteDescriptorSet> writes;
|
|
VkDescriptorBufferInfo dbiUnif{vertex.buffer, 0, VK_WHOLE_SIZE};
|
|
writes.emplace_back(m_compDescSetLayoutBind.makeWrite(m_compDescSet, 0, &dbiUnif));
|
|
vkUpdateDescriptorSets(m_device, static_cast<uint32_t>(writes.size()), writes.data(), 0, nullptr);
|
|
}
|
|
|
|
void HelloVulkan::createCompPipelines()
|
|
{
|
|
// pushing time
|
|
VkPushConstantRange push_constants = {VK_SHADER_STAGE_COMPUTE_BIT, 0, sizeof(float)};
|
|
|
|
VkPipelineLayoutCreateInfo createInfo{VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO};
|
|
createInfo.setLayoutCount = 1;
|
|
createInfo.pSetLayouts = &m_compDescSetLayout;
|
|
createInfo.pushConstantRangeCount = 1;
|
|
createInfo.pPushConstantRanges = &push_constants;
|
|
vkCreatePipelineLayout(m_device, &createInfo, nullptr, &m_compPipelineLayout);
|
|
|
|
|
|
VkComputePipelineCreateInfo computePipelineCreateInfo{VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO};
|
|
computePipelineCreateInfo.layout = m_compPipelineLayout;
|
|
|
|
computePipelineCreateInfo.stage =
|
|
nvvk::createShaderStageInfo(m_device, nvh::loadFile("spv/anim.comp.spv", true, defaultSearchPaths, true),
|
|
VK_SHADER_STAGE_COMPUTE_BIT);
|
|
|
|
vkCreateComputePipelines(m_device, {}, 1, &computePipelineCreateInfo, nullptr, &m_compPipeline);
|
|
|
|
vkDestroyShaderModule(m_device, computePipelineCreateInfo.stage.module, nullptr);
|
|
}
|