Updated instancing example, using instanced attributes (instead of one big ubo), staging, new meshes, etc.
This commit is contained in:
saschawillems
parent
3faee12381
commit
8e2115a0d4
7 changed files with 298 additions and 152 deletions
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@ -1,5 +1,5 @@
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/*
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* Vulkan Example - Instanced mesh rendering
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* Vulkan Example - Instanced mesh rendering, uses a separate vertex buffer for instanced data
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*
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* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
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*
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@ -12,6 +12,7 @@
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#include <assert.h>
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#include <time.h>
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#include <vector>
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#include <random>
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#define GLM_FORCE_RADIANS
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#define GLM_FORCE_DEPTH_ZERO_TO_ONE
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@ -22,8 +23,9 @@
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#include "vulkanexamplebase.h"
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#define VERTEX_BUFFER_BIND_ID 0
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#define INSTANCE_BUFFER_BIND_ID 1
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#define ENABLE_VALIDATION false
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#define INSTANCING_RANGE 3
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#define INSTANCE_COUNT 2048
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// Vertex layout for this example
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std::vector<vkMeshLoader::VertexLayout> vertexLayout =
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@ -47,26 +49,30 @@ public:
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vkMeshLoader::MeshBuffer example;
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} meshes;
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// Number of mesh instances to be rendered
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uint32_t instanceCount;
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struct {
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vkTools::VulkanTexture colorMap;
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} textures;
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struct UboInstanceData{
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// Model matrix for each instance
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glm::mat4 model;
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// Color for each instance
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// vec4 is used due to memory alignment
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// GPU aligns at 16 bytes
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glm::vec4 color;
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// Per-instance data block
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struct InstanceData {
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glm::vec3 pos;
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glm::vec3 rot;
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float scale;
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uint32_t texIndex;
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};
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// Contains the instanced data
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struct {
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// Global matrices
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struct {
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glm::mat4 projection;
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glm::mat4 view;
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} matrices;
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// Seperate data for each instance
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UboInstanceData *instance;
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VkBuffer buffer = VK_NULL_HANDLE;
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VkDeviceMemory memory = VK_NULL_HANDLE;
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size_t size = 0;
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VkDescriptorBufferInfo descriptor;
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} instanceBuffer;
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struct {
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glm::mat4 projection;
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glm::mat4 view;
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float time = 0.0f;
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} uboVS;
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struct {
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@ -83,29 +89,20 @@ public:
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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zoom = -36.0f;
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rotationSpeed = 0.15f;
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rotation = glm::vec3(-20.0f, 45.0f, 0.0f);
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zoom = -12.0f;
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rotationSpeed = 0.25f;
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title = "Vulkan Example - Instanced mesh rendering";
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srand(time(NULL));
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}
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~VulkanExample()
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{
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// Clean up used Vulkan resources
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// Note : Inherited destructor cleans up resources stored in base class
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vkDestroyPipeline(device, pipelines.solid, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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// Meshes
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vkMeshLoader::freeMeshBufferResources(device, &meshes.example);
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// Uniform buffers
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vkTools::destroyUniformData(device, &uniformData.vsScene);
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delete[] uboVS.instance;
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textureLoader->destroyTexture(textures.colorMap);
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}
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void buildCommandBuffers()
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@ -118,63 +115,50 @@ public:
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VkRenderPassBeginInfo renderPassBeginInfo = vkTools::initializers::renderPassBeginInfo();
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renderPassBeginInfo.renderPass = renderPass;
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renderPassBeginInfo.renderArea.offset.x = 0;
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renderPassBeginInfo.renderArea.offset.y = 0;
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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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VkResult err;
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for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
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{
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// Set target frame buffer
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renderPassBeginInfo.framebuffer = frameBuffers[i];
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err = vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo);
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assert(!err);
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vkTools::checkResult(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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VkViewport viewport = vkTools::initializers::viewport(
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(float)width,
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(float)height,
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0.0f,
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1.0f);
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VkViewport viewport = vkTools::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
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VkRect2D scissor = vkTools::initializers::rect2D(
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width,
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height,
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0,
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0);
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VkRect2D scissor = vkTools::initializers::rect2D(width, height, 0, 0);
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vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.solid);
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VkDeviceSize offsets[1] = { 0 };
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// Binding point 0 : Mesh vertex buffer
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &meshes.example.vertices.buf, offsets);
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// Binding point 1 : Instance data buffer
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vkCmdBindVertexBuffers(drawCmdBuffers[i], INSTANCE_BUFFER_BIND_ID, 1, &instanceBuffer.buffer, offsets);
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vkCmdBindIndexBuffer(drawCmdBuffers[i], meshes.example.indices.buf, 0, VK_INDEX_TYPE_UINT32);
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// Render instances
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vkCmdDrawIndexed(drawCmdBuffers[i], meshes.example.indexCount, instanceCount, 0, 0, 0);
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vkCmdDrawIndexed(drawCmdBuffers[i], meshes.example.indexCount, INSTANCE_COUNT, 0, 0, 0);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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err = vkEndCommandBuffer(drawCmdBuffers[i]);
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assert(!err);
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vkTools::checkResult(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void draw()
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{
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VkResult err;
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// Get next image in the swap chain (back/front buffer)
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err = swapChain.acquireNextImage(semaphores.presentComplete, ¤tBuffer);
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assert(!err);
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vkTools::checkResult(swapChain.acquireNextImage(semaphores.presentComplete, ¤tBuffer));
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submitPostPresentBarrier(swapChain.buffers[currentBuffer].image);
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@ -183,64 +167,122 @@ public:
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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// Submit to queue
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err = vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE);
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assert(!err);
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vkTools::checkResult(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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submitPrePresentBarrier(swapChain.buffers[currentBuffer].image);
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err = swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete);
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assert(!err);
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vkTools::checkResult(swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete));
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err = vkQueueWaitIdle(queue);
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assert(!err);
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vkTools::checkResult(vkQueueWaitIdle(queue));
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}
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void loadMeshes()
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{
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loadMesh(getAssetPath() + "models/angryteapot.3ds", &meshes.example, vertexLayout, 0.05f);
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loadMesh(getAssetPath() + "models/rock01.dae", &meshes.example, vertexLayout, 0.1f);
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}
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void loadTextures()
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{
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textureLoader->loadTextureArray(
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getAssetPath() + "textures/texturearray_rocks_bc3.ktx",
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VK_FORMAT_BC3_UNORM_BLOCK,
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&textures.colorMap);
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}
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void setupVertexDescriptions()
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{
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// Binding description
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vertices.bindingDescriptions.resize(1);
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vertices.bindingDescriptions.resize(2);
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// Mesh vertex buffer (description) at binding point 0
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vertices.bindingDescriptions[0] =
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vkTools::initializers::vertexInputBindingDescription(
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VERTEX_BUFFER_BIND_ID,
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vkMeshLoader::vertexSize(vertexLayout),
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// Input rate for the data passed to shader
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// Step for each vertex rendered
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VK_VERTEX_INPUT_RATE_VERTEX);
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vertices.bindingDescriptions[1] =
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vkTools::initializers::vertexInputBindingDescription(
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INSTANCE_BUFFER_BIND_ID,
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sizeof(InstanceData),
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// Input rate for the data passed to shader
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// Step for each instance rendered
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VK_VERTEX_INPUT_RATE_INSTANCE);
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// Attribute descriptions
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// Describes memory layout and shader positions
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vertices.attributeDescriptions.resize(4);
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vertices.attributeDescriptions.clear();
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// Per-Vertex attributes
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// Location 0 : Position
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vertices.attributeDescriptions[0] =
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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0,
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VK_FORMAT_R32G32B32_SFLOAT,
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0);
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0)
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);
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// Location 1 : Normal
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vertices.attributeDescriptions[1] =
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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1,
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VK_FORMAT_R32G32B32_SFLOAT,
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sizeof(float) * 3);
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sizeof(float) * 3)
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);
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// Location 2 : Texture coordinates
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vertices.attributeDescriptions[2] =
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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2,
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VK_FORMAT_R32G32_SFLOAT,
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sizeof(float) * 6);
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sizeof(float) * 6)
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);
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// Location 3 : Color
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vertices.attributeDescriptions[3] =
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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3,
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VK_FORMAT_R32G32B32_SFLOAT,
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sizeof(float) * 8);
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sizeof(float) * 8)
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);
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// Instanced attributes
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// Location 4 : Position
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID,
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5,
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VK_FORMAT_R32G32B32_SFLOAT,
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sizeof(float) * 3)
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);
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// Location 5 : Rotation
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID,
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4,
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VK_FORMAT_R32G32B32_SFLOAT,
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0)
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);
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// Location 6 : Scale
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID,
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6,
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VK_FORMAT_R32_SFLOAT,
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sizeof(float) * 6)
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);
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// Location 7 : Texture array layer index
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vertices.attributeDescriptions.push_back(
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vkTools::initializers::vertexInputAttributeDescription(
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INSTANCE_BUFFER_BIND_ID,
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7,
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VK_FORMAT_R32_SINT,
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sizeof(float) * 7)
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);
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vertices.inputState = vkTools::initializers::pipelineVertexInputStateCreateInfo();
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vertices.inputState.vertexBindingDescriptionCount = vertices.bindingDescriptions.size();
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@ -255,6 +297,7 @@ public:
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std::vector<VkDescriptorPoolSize> poolSizes =
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{
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1),
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo =
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@ -276,6 +319,11 @@ public:
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VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
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VK_SHADER_STAGE_VERTEX_BIT,
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0),
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// Binding 1 : Fragment shader combined sampler
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vkTools::initializers::descriptorSetLayoutBinding(
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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VK_SHADER_STAGE_FRAGMENT_BIT,
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1),
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};
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VkDescriptorSetLayoutCreateInfo descriptorLayout =
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@ -306,15 +354,29 @@ public:
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VkResult vkRes = vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet);
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assert(!vkRes);
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// Binding 0 : Vertex shader uniform buffer
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VkWriteDescriptorSet writeDescriptorSet =
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VkDescriptorImageInfo texDescriptor =
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vkTools::initializers::descriptorImageInfo(
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textures.colorMap.sampler,
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textures.colorMap.view,
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VK_IMAGE_LAYOUT_GENERAL);
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std::vector<VkWriteDescriptorSet> writeDescriptorSets =
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{
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// Binding 0 : Vertex shader uniform buffer
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vkTools::initializers::writeDescriptorSet(
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descriptorSet,
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descriptorSet,
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VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
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0,
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&uniformData.vsScene.descriptor);
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&uniformData.vsScene.descriptor),
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// Binding 1 : Color map
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vkTools::initializers::writeDescriptorSet(
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descriptorSet,
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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1,
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&texDescriptor)
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};
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vkUpdateDescriptorSets(device, 1, &writeDescriptorSet, 0, NULL);
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vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, NULL);
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}
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void preparePipelines()
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@ -328,8 +390,8 @@ public:
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VkPipelineRasterizationStateCreateInfo rasterizationState =
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vkTools::initializers::pipelineRasterizationStateCreateInfo(
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VK_POLYGON_MODE_FILL,
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VK_CULL_MODE_NONE,
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VK_FRONT_FACE_COUNTER_CLOCKWISE,
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VK_CULL_MODE_BACK_BIT,
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VK_FRONT_FACE_CLOCKWISE,
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0);
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VkPipelineColorBlendAttachmentState blendAttachmentState =
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@ -394,84 +456,114 @@ public:
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assert(!err);
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}
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float rnd(float range)
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{
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return range * (rand() / double(RAND_MAX));
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}
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void prepareInstanceData()
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{
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std::vector<InstanceData> instanceData;
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instanceData.resize(INSTANCE_COUNT);
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std::mt19937 rndGenerator(time(NULL));
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std::uniform_real_distribution<double> uniformDist(0.0, 1.0);
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for (auto i = 0; i < INSTANCE_COUNT; i++)
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{
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instanceData[i].rot = glm::vec3(M_PI * uniformDist(rndGenerator), M_PI * uniformDist(rndGenerator), M_PI * uniformDist(rndGenerator));
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float theta = 2 * M_PI * uniformDist(rndGenerator);
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float phi = acos(1 - 2 * uniformDist(rndGenerator));
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glm::vec3 pos;
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instanceData[i].pos = glm::vec3(sin(phi) * cos(theta), sin(theta) * uniformDist(rndGenerator) / 1500.0f, cos(phi)) * 7.5f;
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instanceData[i].scale = 1.0f + uniformDist(rndGenerator) * 2.0f;
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instanceData[i].texIndex = rnd(textures.colorMap.layerCount);
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}
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instanceBuffer.size = instanceData.size() * sizeof(InstanceData);
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// Staging
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// Instanced data is static, copy to device local memory
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// This results in better performance
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struct {
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VkDeviceMemory memory;
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VkBuffer buffer;
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} stagingBuffer;
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VulkanExampleBase::createBuffer(
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VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT,
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instanceBuffer.size,
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instanceData.data(),
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&stagingBuffer.buffer,
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&stagingBuffer.memory);
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VulkanExampleBase::createBuffer(
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VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT |VK_BUFFER_USAGE_TRANSFER_DST_BIT,
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VK_MEMORY_HEAP_DEVICE_LOCAL_BIT,
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instanceBuffer.size,
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nullptr,
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&instanceBuffer.buffer,
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&instanceBuffer.memory);
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// Copy to staging buffer
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VkCommandBuffer copyCmd = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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VkBufferCopy copyRegion = { };
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copyRegion.size = instanceBuffer.size;
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vkCmdCopyBuffer(
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copyCmd,
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stagingBuffer.buffer,
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instanceBuffer.buffer,
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1,
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©Region);
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VulkanExampleBase::flushCommandBuffer(copyCmd, queue, true);
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instanceBuffer.descriptor.range = instanceBuffer.size;
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instanceBuffer.descriptor.buffer = instanceBuffer.buffer;
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instanceBuffer.descriptor.offset = 0;
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}
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void prepareUniformBuffers()
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{
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instanceCount = pow((INSTANCING_RANGE * 2) + 1, 3);
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uboVS.instance = new UboInstanceData[instanceCount];
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VkResult err;
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// Vertex shader uniform buffer block
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uint32_t uboSize = sizeof(uboVS.matrices) + (instanceCount * sizeof(UboInstanceData));
|
||||
|
||||
createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
uboSize,
|
||||
sizeof(uboVS),
|
||||
nullptr,
|
||||
&uniformData.vsScene.buffer,
|
||||
&uniformData.vsScene.memory,
|
||||
&uniformData.vsScene.descriptor);
|
||||
|
||||
VkBufferCreateInfo bufferInfo = vkTools::initializers::bufferCreateInfo(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
uboSize);
|
||||
// Map for host access
|
||||
vkTools::checkResult(vkMapMemory(device, uniformData.vsScene.memory, 0, sizeof(uboVS), 0, (void **)&uniformData.vsScene.mapped));
|
||||
|
||||
// Colors and model matrices are fixed
|
||||
float offset = 5.0f;
|
||||
uint32_t index = 0;
|
||||
for (int32_t x = -INSTANCING_RANGE; x <= INSTANCING_RANGE; x++)
|
||||
{
|
||||
for (int32_t y = -INSTANCING_RANGE; y <= INSTANCING_RANGE; y++)
|
||||
{
|
||||
for (int32_t z = -INSTANCING_RANGE; z <= INSTANCING_RANGE; z++)
|
||||
{
|
||||
// Instance model matrix
|
||||
uboVS.instance[index].model = glm::translate(glm::mat4(), glm::vec3(x * offset, y * offset, z * offset));
|
||||
uboVS.instance[index].model = glm::rotate(uboVS.instance[index].model, glm::radians(-45.0f), glm::vec3(0.0f, 1.0f, 0.0f));
|
||||
// Instance color (randomized)
|
||||
uboVS.instance[index].color = glm::vec4((float)(rand() % 255) / 255.0f, (float)(rand() % 255) / 255.0f, (float)(rand() % 255) / 255.0f, 1.0);
|
||||
index++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Update instanced part of the uniform buffer
|
||||
uint8_t *pData;
|
||||
uint32_t dataOffset = sizeof(uboVS.matrices);
|
||||
uint32_t dataSize = instanceCount * sizeof(UboInstanceData);
|
||||
err = vkMapMemory(device, uniformData.vsScene.memory, dataOffset, dataSize, 0, (void **)&pData);
|
||||
assert(!err);
|
||||
memcpy(pData, uboVS.instance, dataSize);
|
||||
vkUnmapMemory(device, uniformData.vsScene.memory);
|
||||
|
||||
updateUniformBufferMatrices();
|
||||
updateUniformBuffer(true);
|
||||
}
|
||||
|
||||
void updateUniformBufferMatrices()
|
||||
void updateUniformBuffer(bool viewChanged)
|
||||
{
|
||||
// Only updates the uniform buffer block part containing the global matrices
|
||||
if (viewChanged)
|
||||
{
|
||||
uboVS.projection = glm::perspective(glm::radians(60.0f), (float)width / (float)height, 0.001f, 256.0f);
|
||||
uboVS.view = glm::translate(glm::mat4(), glm::vec3(0.0f, 0.0f, zoom));
|
||||
uboVS.view = glm::rotate(uboVS.view, glm::radians(rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
|
||||
uboVS.view = glm::rotate(uboVS.view, glm::radians(rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
|
||||
uboVS.view = glm::rotate(uboVS.view, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
|
||||
}
|
||||
|
||||
// Projection
|
||||
uboVS.matrices.projection = glm::perspective(glm::radians(60.0f), (float)width / (float)height, 0.001f, 256.0f);
|
||||
uboVS.time += frameTimer * 0.05f;
|
||||
|
||||
// View
|
||||
uboVS.matrices.view = glm::translate(glm::mat4(), glm::vec3(0.0f, 0.0f, zoom));
|
||||
uboVS.matrices.view = glm::rotate(uboVS.matrices.view, glm::radians(rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
|
||||
uboVS.matrices.view = glm::rotate(uboVS.matrices.view, glm::radians(rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
|
||||
uboVS.matrices.view = glm::rotate(uboVS.matrices.view, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
|
||||
|
||||
// Only update the matrices part of the uniform buffer
|
||||
uint8_t *pData;
|
||||
VkResult err = vkMapMemory(device, uniformData.vsScene.memory, 0, sizeof(uboVS.matrices), 0, (void **)&pData);
|
||||
assert(!err);
|
||||
memcpy(pData, &uboVS.matrices, sizeof(uboVS.matrices));
|
||||
vkUnmapMemory(device, uniformData.vsScene.memory);
|
||||
memcpy(uniformData.vsScene.mapped, &uboVS, sizeof(uboVS));
|
||||
}
|
||||
|
||||
void prepare()
|
||||
{
|
||||
VulkanExampleBase::prepare();
|
||||
loadTextures();
|
||||
loadMeshes();
|
||||
prepareInstanceData();
|
||||
setupVertexDescriptions();
|
||||
prepareUniformBuffers();
|
||||
setupDescriptorSetLayout();
|
||||
|
|
@ -485,15 +577,20 @@ public:
|
|||
virtual void render()
|
||||
{
|
||||
if (!prepared)
|
||||
{
|
||||
return;
|
||||
vkDeviceWaitIdle(device);
|
||||
}
|
||||
draw();
|
||||
vkDeviceWaitIdle(device);
|
||||
if (!paused)
|
||||
{
|
||||
vkDeviceWaitIdle(device);
|
||||
updateUniformBuffer(false);
|
||||
}
|
||||
}
|
||||
|
||||
virtual void viewChanged()
|
||||
{
|
||||
updateUniformBufferMatrices();
|
||||
updateUniformBuffer(true);
|
||||
}
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue