765 lines
No EOL
24 KiB
C++
765 lines
No EOL
24 KiB
C++
/*
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* Vulkan Example - Attraction based compute shader particle system
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*
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* Updated compute shader by Lukas Bergdoll (https://github.com/Voultapher)
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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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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.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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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <vulkan/vulkan.h>
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#include "vulkanexamplebase.h"
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#define VERTEX_BUFFER_BIND_ID 0
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#define ENABLE_VALIDATION false
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#if defined(__ANDROID__)
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// Lower particle count on Android for performance reasons
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#define PARTICLE_COUNT 64 * 1024
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#else
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#define PARTICLE_COUNT 256 * 1024
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#endif
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class VulkanExample : public VulkanExampleBase
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{
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public:
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float timer = 0.0f;
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float animStart = 20.0f;
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bool animate = true;
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struct {
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vkTools::VulkanTexture particle;
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vkTools::VulkanTexture gradient;
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} textures;
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struct {
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VkPipelineVertexInputStateCreateInfo inputState;
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std::vector<VkVertexInputBindingDescription> bindingDescriptions;
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std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
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} vertices;
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struct {
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VkPipeline postCompute;
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// Compute pipelines are separated from
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// graphics pipelines in Vulkan
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VkPipeline compute;
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} pipelines;
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VkQueue computeQueue;
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//VkCommandBuffer computeCmdBuffer;
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VkPipelineLayout computePipelineLayout;
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VkDescriptorSet computeDescriptorSet;
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VkDescriptorSetLayout computeDescriptorSetLayout;
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vkTools::UniformData computeStorageBuffer;
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struct {
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float deltaT;
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float destX;
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float destY;
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int32_t particleCount = PARTICLE_COUNT;
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} computeUbo;
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struct {
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struct {
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vkTools::UniformData ubo;
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} computeShader;
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} uniformData;
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struct Particle {
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glm::vec2 pos;
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glm::vec2 vel;
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glm::vec4 gradientPos;
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};
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VkPipelineLayout pipelineLayout;
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VkDescriptorSet descriptorSetPostCompute;
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VkDescriptorSetLayout descriptorSetLayout;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "Vulkan Example - Compute shader particle system";
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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.postCompute, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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vkDestroyBuffer(device, computeStorageBuffer.buffer, nullptr);
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vkFreeMemory(device, computeStorageBuffer.memory, nullptr);
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vkTools::destroyUniformData(device, &uniformData.computeShader.ubo);
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vkDestroyPipelineLayout(device, computePipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, computeDescriptorSetLayout, nullptr);
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vkDestroyPipeline(device, pipelines.compute, nullptr);
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textureLoader->destroyTexture(textures.particle);
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textureLoader->destroyTexture(textures.gradient);
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}
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void loadTextures()
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{
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textureLoader->loadTexture(getAssetPath() + "textures/particle01_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, &textures.particle, false);
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textureLoader->loadTexture(getAssetPath() + "textures/particle_gradient_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, &textures.gradient, false);
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}
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void buildCommandBuffers()
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{
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// Destroy command buffers if already present
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if (!checkCommandBuffers())
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{
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destroyCommandBuffers();
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createCommandBuffers();
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}
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VkCommandBufferBeginInfo cmdBufInfo = vkTools::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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clearValues[0].color = defaultClearColor;
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clearValues[1].depthStencil = { 1.0f, 0 };
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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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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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VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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// Compute particle movement
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// Add memory barrier to ensure that the (rendering) vertex shader operations have finished
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// Required as the compute shader will overwrite the vertex buffer data
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VkBufferMemoryBarrier bufferBarrier = vkTools::initializers::bufferMemoryBarrier();
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// Vertex shader invocations have finished reading from the buffer
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bufferBarrier.srcAccessMask = VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT;
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// Compute shader buffer read and write
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bufferBarrier.dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT | VK_ACCESS_SHADER_READ_BIT;
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bufferBarrier.buffer = computeStorageBuffer.buffer;
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bufferBarrier.size = computeStorageBuffer.descriptor.range;
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bufferBarrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
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bufferBarrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
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vkCmdPipelineBarrier(
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drawCmdBuffers[i],
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VK_PIPELINE_STAGE_VERTEX_SHADER_BIT,
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VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
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VK_FLAGS_NONE,
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0, nullptr,
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1, &bufferBarrier,
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0, nullptr);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_COMPUTE, pipelines.compute);
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_COMPUTE, computePipelineLayout, 0, 1, &computeDescriptorSet, 0, 0);
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// Dispatch the compute job
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vkCmdDispatch(drawCmdBuffers[i], PARTICLE_COUNT / 16, 1, 1);
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// Add memory barrier to ensure that compute shader has finished writing to the buffer
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// Without this the (rendering) vertex shader may display incomplete results (partial data from last frame)
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// Compute shader has finished writes to the buffer
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bufferBarrier.srcAccessMask = VK_ACCESS_SHADER_WRITE_BIT;
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// Vertex shader access (attribute binding)
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bufferBarrier.dstAccessMask = VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT;
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bufferBarrier.buffer = computeStorageBuffer.buffer;
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bufferBarrier.size = computeStorageBuffer.descriptor.range;
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bufferBarrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
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bufferBarrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
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vkCmdPipelineBarrier(
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drawCmdBuffers[i],
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VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
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VK_PIPELINE_STAGE_VERTEX_SHADER_BIT,
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VK_FLAGS_NONE,
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0, nullptr,
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1, &bufferBarrier,
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0, nullptr);
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// Draw the particle system using the update vertex buffer
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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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(width, height, 0, 0);
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vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.postCompute);
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSetPostCompute, 0, NULL);
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VkDeviceSize offsets[1] = { 0 };
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &computeStorageBuffer.buffer, offsets);
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vkCmdDraw(drawCmdBuffers[i], PARTICLE_COUNT, 1, 0, 0);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void draw()
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{
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// Get next image in the swap chain (back/front buffer)
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VK_CHECK_RESULT(swapChain.acquireNextImage(semaphores.presentComplete, ¤tBuffer));
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submitPostPresentBarrier(swapChain.buffers[currentBuffer].image);
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// Command buffer to be sumitted to the queue
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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// Submit to queue
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VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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submitPrePresentBarrier(swapChain.buffers[currentBuffer].image);
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VK_CHECK_RESULT(swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete));
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}
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// Setup and fill the compute shader storage buffers for
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// vertex positions and velocities
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void prepareStorageBuffers()
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{
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std::mt19937 rGenerator;
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std::uniform_real_distribution<float> rDistribution(-1.0f, 1.0f);
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// Initial particle positions
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std::vector<Particle> particleBuffer(PARTICLE_COUNT);
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for (auto& particle : particleBuffer)
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{
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particle.pos = glm::vec2(rDistribution(rGenerator), rDistribution(rGenerator));
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particle.vel = glm::vec2(0.0f);
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particle.gradientPos.x = particle.pos.x / 2.0f;
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}
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uint32_t storageBufferSize = particleBuffer.size() * sizeof(Particle);
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// Staging
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// SSBO 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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storageBufferSize,
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particleBuffer.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_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
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VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
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storageBufferSize,
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nullptr,
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&computeStorageBuffer.buffer,
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&computeStorageBuffer.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 = storageBufferSize;
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vkCmdCopyBuffer(
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copyCmd,
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stagingBuffer.buffer,
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computeStorageBuffer.buffer,
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1,
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©Region);
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VulkanExampleBase::flushCommandBuffer(copyCmd, queue, true);
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vkFreeMemory(device, stagingBuffer.memory, nullptr);
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vkDestroyBuffer(device, stagingBuffer.buffer, nullptr);
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computeStorageBuffer.descriptor.range = storageBufferSize;
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computeStorageBuffer.descriptor.buffer = computeStorageBuffer.buffer;
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computeStorageBuffer.descriptor.offset = 0;
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// Binding description
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vertices.bindingDescriptions.resize(1);
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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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sizeof(Particle),
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VK_VERTEX_INPUT_RATE_VERTEX);
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// Attribute descriptions
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// Describes memory layout and shader positions
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vertices.attributeDescriptions.resize(2);
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// Location 0 : Position
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vertices.attributeDescriptions[0] =
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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_R32G32_SFLOAT,
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0);
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// Location 1 : Gradient position
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vertices.attributeDescriptions[1] =
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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_R32G32B32A32_SFLOAT,
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4 * sizeof(float));
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// Assign to vertex buffer
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vertices.inputState = vkTools::initializers::pipelineVertexInputStateCreateInfo();
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vertices.inputState.vertexBindingDescriptionCount = vertices.bindingDescriptions.size();
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vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
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vertices.inputState.vertexAttributeDescriptionCount = vertices.attributeDescriptions.size();
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vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
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}
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void setupDescriptorPool()
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{
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std::vector<VkDescriptorPoolSize> poolSizes =
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{
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1),
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2)
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo =
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vkTools::initializers::descriptorPoolCreateInfo(
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poolSizes.size(),
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poolSizes.data(),
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2);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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}
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void setupDescriptorSetLayout()
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{
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings;
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// Binding 0 : Particle color map
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setLayoutBindings.push_back(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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0));
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// Binding 1 : Particle gradient ramp
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setLayoutBindings.push_back(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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VkDescriptorSetLayoutCreateInfo descriptorLayout =
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vkTools::initializers::descriptorSetLayoutCreateInfo(
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setLayoutBindings.data(),
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setLayoutBindings.size());
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
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VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo =
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vkTools::initializers::pipelineLayoutCreateInfo(
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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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}
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void setupDescriptorSet()
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{
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VkDescriptorSetAllocateInfo allocInfo =
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vkTools::initializers::descriptorSetAllocateInfo(
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descriptorPool,
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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSetPostCompute));
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// Image descriptor for the color map texture
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std::vector<VkDescriptorImageInfo> texDescriptors;
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texDescriptors.push_back(vkTools::initializers::descriptorImageInfo(
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textures.particle.sampler,
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textures.particle.view,
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VK_IMAGE_LAYOUT_GENERAL));
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texDescriptors.push_back(vkTools::initializers::descriptorImageInfo(
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textures.gradient.sampler,
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textures.gradient.view,
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VK_IMAGE_LAYOUT_GENERAL));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets;
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// Binding 0 : Particle color map
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writeDescriptorSets.push_back(vkTools::initializers::writeDescriptorSet(
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descriptorSetPostCompute,
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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0,
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&texDescriptors[0]));
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// Binding 1 : Particle gradient ramp
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writeDescriptorSets.push_back(vkTools::initializers::writeDescriptorSet(
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descriptorSetPostCompute,
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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1,
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&texDescriptors[1]));
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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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{
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
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vkTools::initializers::pipelineInputAssemblyStateCreateInfo(
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VK_PRIMITIVE_TOPOLOGY_POINT_LIST,
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0,
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VK_FALSE);
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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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0);
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VkPipelineColorBlendAttachmentState blendAttachmentState =
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vkTools::initializers::pipelineColorBlendAttachmentState(
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0xf,
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VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendState =
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vkTools::initializers::pipelineColorBlendStateCreateInfo(
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1,
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&blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilState =
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vkTools::initializers::pipelineDepthStencilStateCreateInfo(
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VK_FALSE,
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VK_FALSE,
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VK_COMPARE_OP_ALWAYS);
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VkPipelineViewportStateCreateInfo viewportState =
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vkTools::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
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VkPipelineMultisampleStateCreateInfo multisampleState =
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vkTools::initializers::pipelineMultisampleStateCreateInfo(
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VK_SAMPLE_COUNT_1_BIT,
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0);
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std::vector<VkDynamicState> dynamicStateEnables = {
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VK_DYNAMIC_STATE_VIEWPORT,
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VK_DYNAMIC_STATE_SCISSOR
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};
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VkPipelineDynamicStateCreateInfo dynamicState =
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vkTools::initializers::pipelineDynamicStateCreateInfo(
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dynamicStateEnables.data(),
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dynamicStateEnables.size(),
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0);
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// Rendering pipeline
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// Load shaders
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std::array<VkPipelineShaderStageCreateInfo,2> shaderStages;
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shaderStages[0] = loadShader(getAssetPath() + "shaders/computeparticles/particle.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getAssetPath() + "shaders/computeparticles/particle.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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VkGraphicsPipelineCreateInfo pipelineCreateInfo =
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vkTools::initializers::pipelineCreateInfo(
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pipelineLayout,
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renderPass,
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0);
|
|
|
|
pipelineCreateInfo.pVertexInputState = &vertices.inputState;
|
|
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCreateInfo.pRasterizationState = &rasterizationState;
|
|
pipelineCreateInfo.pColorBlendState = &colorBlendState;
|
|
pipelineCreateInfo.pMultisampleState = &multisampleState;
|
|
pipelineCreateInfo.pViewportState = &viewportState;
|
|
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
|
|
pipelineCreateInfo.pDynamicState = &dynamicState;
|
|
pipelineCreateInfo.stageCount = shaderStages.size();
|
|
pipelineCreateInfo.pStages = shaderStages.data();
|
|
pipelineCreateInfo.renderPass = renderPass;
|
|
|
|
// Additive blending
|
|
blendAttachmentState.colorWriteMask = 0xF;
|
|
blendAttachmentState.blendEnable = VK_TRUE;
|
|
blendAttachmentState.colorBlendOp = VK_BLEND_OP_ADD;
|
|
blendAttachmentState.srcColorBlendFactor = VK_BLEND_FACTOR_ONE;
|
|
blendAttachmentState.dstColorBlendFactor = VK_BLEND_FACTOR_ONE;
|
|
blendAttachmentState.alphaBlendOp = VK_BLEND_OP_ADD;
|
|
blendAttachmentState.srcAlphaBlendFactor = VK_BLEND_FACTOR_SRC_ALPHA;
|
|
blendAttachmentState.dstAlphaBlendFactor = VK_BLEND_FACTOR_DST_ALPHA;
|
|
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.postCompute));
|
|
}
|
|
|
|
void prepareCompute()
|
|
{
|
|
// Create compute pipeline
|
|
// Compute pipelines are created separate from graphics pipelines
|
|
// even if they use the same queue
|
|
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
|
|
// Binding 0 : Particle position storage buffer
|
|
vkTools::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
|
|
VK_SHADER_STAGE_COMPUTE_BIT,
|
|
0),
|
|
// Binding 1 : Uniform buffer
|
|
vkTools::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
VK_SHADER_STAGE_COMPUTE_BIT,
|
|
1),
|
|
};
|
|
|
|
VkDescriptorSetLayoutCreateInfo descriptorLayout =
|
|
vkTools::initializers::descriptorSetLayoutCreateInfo(
|
|
setLayoutBindings.data(),
|
|
setLayoutBindings.size());
|
|
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &computeDescriptorSetLayout));
|
|
|
|
|
|
VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
|
|
vkTools::initializers::pipelineLayoutCreateInfo(
|
|
&computeDescriptorSetLayout,
|
|
1);
|
|
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &computePipelineLayout));
|
|
|
|
VkDescriptorSetAllocateInfo allocInfo =
|
|
vkTools::initializers::descriptorSetAllocateInfo(
|
|
descriptorPool,
|
|
&computeDescriptorSetLayout,
|
|
1);
|
|
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &computeDescriptorSet));
|
|
|
|
std::vector<VkWriteDescriptorSet> computeWriteDescriptorSets =
|
|
{
|
|
// Binding 0 : Particle position storage buffer
|
|
vkTools::initializers::writeDescriptorSet(
|
|
computeDescriptorSet,
|
|
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
|
|
0,
|
|
&computeStorageBuffer.descriptor),
|
|
// Binding 1 : Uniform buffer
|
|
vkTools::initializers::writeDescriptorSet(
|
|
computeDescriptorSet,
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
1,
|
|
&uniformData.computeShader.ubo.descriptor)
|
|
};
|
|
|
|
vkUpdateDescriptorSets(device, computeWriteDescriptorSets.size(), computeWriteDescriptorSets.data(), 0, NULL);
|
|
|
|
// Create pipeline
|
|
VkComputePipelineCreateInfo computePipelineCreateInfo =
|
|
vkTools::initializers::computePipelineCreateInfo(
|
|
computePipelineLayout,
|
|
0);
|
|
computePipelineCreateInfo.stage = loadShader(getAssetPath() + "shaders/computeparticles/particle.comp.spv", VK_SHADER_STAGE_COMPUTE_BIT);
|
|
VK_CHECK_RESULT(vkCreateComputePipelines(device, pipelineCache, 1, &computePipelineCreateInfo, nullptr, &pipelines.compute));
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Compute shader uniform buffer block
|
|
createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
sizeof(computeUbo),
|
|
nullptr,
|
|
&uniformData.computeShader.ubo.buffer,
|
|
&uniformData.computeShader.ubo.memory,
|
|
&uniformData.computeShader.ubo.descriptor);
|
|
|
|
// Map for host access
|
|
vkTools::checkResult(vkMapMemory(device, uniformData.computeShader.ubo.memory, 0, sizeof(computeUbo), 0, (void **)&uniformData.computeShader.ubo.mapped));
|
|
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
computeUbo.deltaT = frameTimer * 2.5f;
|
|
if (animate)
|
|
{
|
|
computeUbo.destX = sin(glm::radians(timer*360.0)) * 0.75f;
|
|
computeUbo.destY = 0.f;
|
|
}
|
|
else
|
|
{
|
|
float normalizedMx = (mousePos.x - static_cast<float>(width / 2)) / static_cast<float>(width / 2);
|
|
float normalizedMy = (mousePos.y - static_cast<float>(height / 2)) / static_cast<float>(height / 2);
|
|
computeUbo.destX = normalizedMx;
|
|
computeUbo.destY = normalizedMy;
|
|
}
|
|
|
|
memcpy(uniformData.computeShader.ubo.mapped, &computeUbo, sizeof(computeUbo));
|
|
}
|
|
|
|
// Find and create a compute capable device queue
|
|
void getComputeQueue()
|
|
{
|
|
uint32_t queueIndex = 0;
|
|
uint32_t queueCount;
|
|
vkGetPhysicalDeviceQueueFamilyProperties(physicalDevice, &queueCount, NULL);
|
|
assert(queueCount >= 1);
|
|
|
|
std::vector<VkQueueFamilyProperties> queueProps;
|
|
queueProps.resize(queueCount);
|
|
vkGetPhysicalDeviceQueueFamilyProperties(physicalDevice, &queueCount, queueProps.data());
|
|
|
|
for (queueIndex = 0; queueIndex < queueCount; queueIndex++)
|
|
{
|
|
if (queueProps[queueIndex].queueFlags & VK_QUEUE_COMPUTE_BIT)
|
|
break;
|
|
}
|
|
assert(queueIndex < queueCount);
|
|
|
|
VkDeviceQueueCreateInfo queueCreateInfo = {};
|
|
queueCreateInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
|
|
queueCreateInfo.pNext = NULL;
|
|
queueCreateInfo.queueFamilyIndex = queueIndex;
|
|
queueCreateInfo.queueCount = 1;
|
|
vkGetDeviceQueue(device, queueIndex, 0, &computeQueue);
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
loadTextures();
|
|
getComputeQueue();
|
|
prepareStorageBuffers();
|
|
prepareUniformBuffers();
|
|
setupDescriptorSetLayout();
|
|
preparePipelines();
|
|
setupDescriptorPool();
|
|
setupDescriptorSet();
|
|
prepareCompute();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
|
|
if (animate)
|
|
{
|
|
if (animStart > 0.0f)
|
|
{
|
|
animStart -= frameTimer * 5.0f;
|
|
}
|
|
else if (animStart <= 0.0f)
|
|
{
|
|
timer += frameTimer * 0.04f;
|
|
if (timer > 1.f)
|
|
timer = 0.f;
|
|
}
|
|
}
|
|
|
|
vkDeviceWaitIdle(device);
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
void toggleAnimation()
|
|
{
|
|
animate = !animate;
|
|
}
|
|
};
|
|
|
|
VulkanExample *vulkanExample;
|
|
|
|
#if defined(_WIN32)
|
|
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
if (vulkanExample != NULL)
|
|
{
|
|
vulkanExample->handleMessages(hWnd, uMsg, wParam, lParam);
|
|
if (uMsg == WM_KEYDOWN)
|
|
{
|
|
switch (wParam)
|
|
{
|
|
case 0x41:
|
|
vulkanExample->toggleAnimation();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return (DefWindowProc(hWnd, uMsg, wParam, lParam));
|
|
}
|
|
#elif defined(__linux__) && !defined(__ANDROID__)
|
|
static void handleEvent(const xcb_generic_event_t *event)
|
|
{
|
|
if (vulkanExample != NULL)
|
|
{
|
|
vulkanExample->handleEvent(event);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Main entry point
|
|
#if defined(_WIN32)
|
|
// Windows entry point
|
|
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR pCmdLine, int nCmdShow)
|
|
#elif defined(__ANDROID__)
|
|
// Android entry point
|
|
void android_main(android_app* state)
|
|
#elif defined(__linux__)
|
|
// Linux entry point
|
|
int main(const int argc, const char *argv[])
|
|
#endif
|
|
{
|
|
#if defined(__ANDROID__)
|
|
// Removing this may cause the compiler to omit the main entry point
|
|
// which would make the application crash at start
|
|
app_dummy();
|
|
#endif
|
|
vulkanExample = new VulkanExample();
|
|
#if defined(_WIN32)
|
|
vulkanExample->setupWindow(hInstance, WndProc);
|
|
#elif defined(__ANDROID__)
|
|
// Attach vulkan example to global android application state
|
|
state->userData = vulkanExample;
|
|
state->onAppCmd = VulkanExample::handleAppCommand;
|
|
state->onInputEvent = VulkanExample::handleAppInput;
|
|
vulkanExample->androidApp = state;
|
|
#elif defined(__linux__)
|
|
vulkanExample->setupWindow();
|
|
#endif
|
|
#if !defined(__ANDROID__)
|
|
vulkanExample->initSwapchain();
|
|
vulkanExample->prepare();
|
|
#endif
|
|
vulkanExample->renderLoop();
|
|
delete(vulkanExample);
|
|
#if !defined(__ANDROID__)
|
|
return 0;
|
|
#endif
|
|
} |