565 lines
23 KiB
C++
565 lines
23 KiB
C++
/*
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* Vulkan Example - CPU based particle system
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*
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* This sample renders a particle system that is updated on the host (by the CPU) and rendered by the GPU using a vertex buffer
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*
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* Copyright (C) 2016-2023 by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include "vulkanexamplebase.h"
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#include "VulkanglTFModel.h"
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#define PARTICLE_COUNT 512
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#define FLAME_RADIUS 8.0f
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// The particle system is made from two different particle types
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// That type defines how a particle is rendered
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#define PARTICLE_TYPE_FLAME 0
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#define PARTICLE_TYPE_SMOKE 1
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struct Particle {
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glm::vec4 pos;
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glm::vec4 color;
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float alpha;
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float size;
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float rotation;
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uint32_t type;
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glm::vec4 vel;
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float rotationSpeed;
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};
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class VulkanExample : public VulkanExampleBase
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{
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public:
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struct {
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struct {
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vks::Texture2D smoke;
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vks::Texture2D fire;
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// Use a custom sampler to change sampler attributes required for rotating the uvs in the shader for alpha blended textures
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VkSampler sampler;
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} particles;
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struct {
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vks::Texture2D colorMap;
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vks::Texture2D normalMap;
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} floor;
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} textures{};
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vkglTF::Model environment;
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// These parameters define the particle system behaviour
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glm::vec3 emitterPos = glm::vec3(0.0f, -FLAME_RADIUS + 2.0f, 0.0f);
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glm::vec3 minVel = glm::vec3(-3.0f, 0.5f, -3.0f);
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glm::vec3 maxVel = glm::vec3(3.0f, 7.0f, 3.0f);
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struct Particles {
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VkBuffer buffer{ VK_NULL_HANDLE };
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VkDeviceMemory memory{ VK_NULL_HANDLE };
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// Store the mapped address of the particle data for reuse
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void *mappedMemory;
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// Size of the particle buffer in bytes
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size_t size{ 0 };
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} particles;
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struct {
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vks::Buffer particles;
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vks::Buffer environment;
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} uniformBuffers;
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struct UniformDataParticles {
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glm::mat4 projection;
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glm::mat4 modelView;
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// The viewport dimension is used by the particle system vertex shader
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// to calculate the absolute point size based on the current viewport size
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glm::vec2 viewportDim;
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// This is the base point size for all particles
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float pointSize{ 10.0f };
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} uniformDataParticles;
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struct UniformDataEnvironment {
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glm::mat4 projection;
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glm::mat4 modelView;
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glm::mat4 normal;
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glm::vec4 lightPos = glm::vec4(0.0f, 0.0f, 0.0f, 0.0f);
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} uniformDataEnvironment;
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struct {
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VkPipeline particles{ VK_NULL_HANDLE };
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VkPipeline environment{ VK_NULL_HANDLE };
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} pipelines;
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VkPipelineLayout pipelineLayout{ VK_NULL_HANDLE };
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VkDescriptorSetLayout descriptorSetLayout{ VK_NULL_HANDLE };
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struct {
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VkDescriptorSet particles{ VK_NULL_HANDLE };
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VkDescriptorSet environment{ VK_NULL_HANDLE };
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} descriptorSets;
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std::vector<Particle> particleBuffer{};
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std::default_random_engine rndEngine;
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VulkanExample() : VulkanExampleBase()
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{
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title = "CPU based particle system";
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camera.type = Camera::CameraType::lookat;
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camera.setPosition(glm::vec3(0.0f, 0.0f, -75.0f));
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camera.setRotation(glm::vec3(-15.0f, 45.0f, 0.0f));
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camera.setPerspective(60.0f, (float)width / (float)height, 1.0f, 256.0f);
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timerSpeed *= 8.0f;
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rndEngine.seed(benchmark.active ? 0 : (unsigned)time(nullptr));
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}
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~VulkanExample()
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{
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if (device) {
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textures.particles.smoke.destroy();
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textures.particles.fire.destroy();
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textures.floor.colorMap.destroy();
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textures.floor.normalMap.destroy();
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vkDestroyPipeline(device, pipelines.particles, nullptr);
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vkDestroyPipeline(device, pipelines.environment, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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vkUnmapMemory(device, particles.memory);
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vkDestroyBuffer(device, particles.buffer, nullptr);
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vkFreeMemory(device, particles.memory, nullptr);
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uniformBuffers.environment.destroy();
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uniformBuffers.particles.destroy();
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vkDestroySampler(device, textures.particles.sampler, nullptr);
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}
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}
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virtual void getEnabledFeatures()
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{
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// Enable anisotropic filtering if supported
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if (deviceFeatures.samplerAnisotropy) {
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enabledFeatures.samplerAnisotropy = VK_TRUE;
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};
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}
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void buildCommandBuffers()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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clearValues[0].color = defaultClearColor;
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clearValues[1].depthStencil = { 1.0f, 0 };
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VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
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renderPassBeginInfo.renderPass = renderPass;
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renderPassBeginInfo.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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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
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VkRect2D scissor = vks::initializers::rect2D(width, height, 0,0);
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vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
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VkDeviceSize offsets[1] = { 0 };
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// Environment
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSets.environment, 0, nullptr);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.environment);
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environment.draw(drawCmdBuffers[i]);
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// Particle system (no index buffer)
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSets.particles, 0, nullptr);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.particles);
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vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, &particles.buffer, offsets);
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vkCmdDraw(drawCmdBuffers[i], static_cast<uint32_t>(particles.size), 1, 0, 0);
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drawUI(drawCmdBuffers[i]);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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float rnd(float range)
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{
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std::uniform_real_distribution<float> rndDist(0.0f, range);
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return rndDist(rndEngine);
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}
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void initParticle(Particle *particle, glm::vec3 emitterPos)
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{
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particle->vel = glm::vec4(0.0f, minVel.y + rnd(maxVel.y - minVel.y), 0.0f, 0.0f);
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particle->alpha = rnd(0.75f);
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particle->size = 1.0f + rnd(0.5f);
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particle->color = glm::vec4(1.0f);
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particle->type = PARTICLE_TYPE_FLAME;
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particle->rotation = rnd(2.0f * float(M_PI));
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particle->rotationSpeed = rnd(2.0f) - rnd(2.0f);
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// Get random sphere point
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float theta = rnd(2.0f * float(M_PI));
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float phi = rnd(float(M_PI)) - float(M_PI) / 2.0f;
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float r = rnd(FLAME_RADIUS);
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particle->pos.x = r * cos(theta) * cos(phi);
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particle->pos.y = r * sin(phi);
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particle->pos.z = r * sin(theta) * cos(phi);
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particle->pos += glm::vec4(emitterPos, 0.0f);
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}
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// Change the type of a particle, e.g. from flame to smoke
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void transitionParticle(Particle *particle)
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{
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switch (particle->type)
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{
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case PARTICLE_TYPE_FLAME:
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// Flame particles have a chance of turning into smoke
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if (rnd(1.0f) < 0.05f)
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{
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particle->alpha = 0.0f;
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particle->color = glm::vec4(0.25f + rnd(0.25f));
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particle->pos.x *= 0.5f;
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particle->pos.z *= 0.5f;
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particle->vel = glm::vec4(rnd(1.0f) - rnd(1.0f), (minVel.y * 2) + rnd(maxVel.y - minVel.y), rnd(1.0f) - rnd(1.0f), 0.0f);
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particle->size = 1.0f + rnd(0.5f);
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particle->rotationSpeed = rnd(1.0f) - rnd(1.0f);
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particle->type = PARTICLE_TYPE_SMOKE;
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}
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else
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{
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initParticle(particle, emitterPos);
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}
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break;
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case PARTICLE_TYPE_SMOKE:
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// Respawn at end of life
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initParticle(particle, emitterPos);
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break;
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}
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}
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// Initialize the particle system and create a vertex buffer for rendering the particles
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void prepareParticles()
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{
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particleBuffer.resize(PARTICLE_COUNT);
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for (auto& particle : particleBuffer)
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{
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initParticle(&particle, emitterPos);
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particle.alpha = 1.0f - (abs(particle.pos.y) / (FLAME_RADIUS * 2.0f));
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}
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particles.size = particleBuffer.size() * sizeof(Particle);
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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particles.size,
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&particles.buffer,
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&particles.memory,
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particleBuffer.data()));
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// Map the memory and store the pointer for reuse
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VK_CHECK_RESULT(vkMapMemory(device, particles.memory, 0, particles.size, 0, &particles.mappedMemory));
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}
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// Update the state of all particles
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void updateParticles()
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{
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float particleTimer = frameTimer * 0.45f;
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for (auto& particle : particleBuffer)
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{
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switch (particle.type)
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{
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case PARTICLE_TYPE_FLAME:
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particle.pos.y -= particle.vel.y * particleTimer * 3.5f;
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particle.alpha += particleTimer * 2.5f;
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particle.size -= particleTimer * 0.5f;
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break;
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case PARTICLE_TYPE_SMOKE:
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particle.pos -= particle.vel * frameTimer * 1.0f;
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particle.alpha += particleTimer * 1.25f;
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particle.size += particleTimer * 0.125f;
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particle.color -= particleTimer * 0.05f;
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break;
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}
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particle.rotation += particleTimer * particle.rotationSpeed;
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// If a particle has faded out, turn it into the other type (e.g. flame to smoke and vice versa)
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if (particle.alpha > 2.0f)
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{
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transitionParticle(&particle);
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}
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}
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// Copy the updated particles to the vertex buffer
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size_t size = particleBuffer.size() * sizeof(Particle);
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memcpy(particles.mappedMemory, particleBuffer.data(), size);
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}
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void loadAssets()
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{
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// Particles
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textures.particles.smoke.loadFromFile(getAssetPath() + "textures/particle_smoke.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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textures.particles.fire.loadFromFile(getAssetPath() + "textures/particle_fire.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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// Floor
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textures.floor.colorMap.loadFromFile(getAssetPath() + "textures/fireplace_colormap_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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textures.floor.normalMap.loadFromFile(getAssetPath() + "textures/fireplace_normalmap_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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// Create a custom sampler to be used with the particle textures
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// Create sampler
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VkSamplerCreateInfo samplerCreateInfo = vks::initializers::samplerCreateInfo();
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samplerCreateInfo.magFilter = VK_FILTER_LINEAR;
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samplerCreateInfo.minFilter = VK_FILTER_LINEAR;
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samplerCreateInfo.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
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// Different address mode
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samplerCreateInfo.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER;
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samplerCreateInfo.addressModeV = samplerCreateInfo.addressModeU;
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samplerCreateInfo.addressModeW = samplerCreateInfo.addressModeU;
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samplerCreateInfo.mipLodBias = 0.0f;
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samplerCreateInfo.compareOp = VK_COMPARE_OP_NEVER;
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samplerCreateInfo.minLod = 0.0f;
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// Both particle textures have the same number of mip maps
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samplerCreateInfo.maxLod = float(textures.particles.fire.mipLevels);
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if (vulkanDevice->features.samplerAnisotropy)
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{
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// Enable anisotropic filtering
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samplerCreateInfo.maxAnisotropy = 8.0f;
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samplerCreateInfo.anisotropyEnable = VK_TRUE;
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}
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// Use a different border color (than the normal texture loader) for additive blending
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samplerCreateInfo.borderColor = VK_BORDER_COLOR_FLOAT_TRANSPARENT_BLACK;
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VK_CHECK_RESULT(vkCreateSampler(device, &samplerCreateInfo, nullptr, &textures.particles.sampler));
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const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
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environment.loadFromFile(getAssetPath() + "models/fireplace.gltf", vulkanDevice, queue, glTFLoadingFlags);
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}
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void setupDescriptors()
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{
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// Pool
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std::vector<VkDescriptorPoolSize> poolSizes = {
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 2),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 4)
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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// Layout
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
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// Binding 0 : Vertex shader uniform buffer
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
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// Binding 1 : Fragment shader image sampler
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 1),
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// Binding 1 : Fragment shader image sampler
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT,2)
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};
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VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
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// Sets
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std::vector<VkWriteDescriptorSet> writeDescriptorSets;
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VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.particles));
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// Image descriptor for the color map texture
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VkDescriptorImageInfo texDescriptorSmoke = vks::initializers::descriptorImageInfo(textures.particles.sampler, textures.particles.smoke.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
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VkDescriptorImageInfo texDescriptorFire = vks::initializers::descriptorImageInfo(textures.particles.sampler, textures.particles.fire.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
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writeDescriptorSets = {
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// Binding 0: Vertex shader uniform buffer
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vks::initializers::writeDescriptorSet(descriptorSets.particles, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.particles.descriptor),
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// Binding 1: Smoke texture
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vks::initializers::writeDescriptorSet(descriptorSets.particles, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, &texDescriptorSmoke),
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// Binding 1: Fire texture array
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vks::initializers::writeDescriptorSet(descriptorSets.particles, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2, &texDescriptorFire)
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};
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vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
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// Environment
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.environment));
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writeDescriptorSets = {
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// Binding 0: Vertex shader uniform buffer
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vks::initializers::writeDescriptorSet(descriptorSets.environment, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.environment.descriptor),
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// Binding 1: Color map
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vks::initializers::writeDescriptorSet(descriptorSets.environment, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, &textures.floor.colorMap.descriptor),
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// Binding 2: Normal map
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vks::initializers::writeDescriptorSet(descriptorSets.environment, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2, &textures.floor.normalMap.descriptor),
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};
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vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
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}
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void preparePipelines()
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{
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// Layout
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VkPipelineLayoutCreateInfo pipelineLayoutCI = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelineLayout));
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// Pipelines
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_POINT_LIST, 0, VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
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VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
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VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
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std::vector<VkDynamicState> dynamicStateEnables = {VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR};
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VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
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std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
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VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass);
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pipelineCI.pInputAssemblyState = &inputAssemblyState;
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pipelineCI.pRasterizationState = &rasterizationState;
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pipelineCI.pColorBlendState = &colorBlendState;
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pipelineCI.pMultisampleState = &multisampleState;
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pipelineCI.pViewportState = &viewportState;
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pipelineCI.pDepthStencilState = &depthStencilState;
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pipelineCI.pDynamicState = &dynamicState;
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pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
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pipelineCI.pStages = shaderStages.data();
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|
|
|
// Particle rendering pipeline
|
|
{
|
|
// Vertex input state
|
|
VkVertexInputBindingDescription vertexInputBinding =
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|
vks::initializers::vertexInputBindingDescription(0, sizeof(Particle), VK_VERTEX_INPUT_RATE_VERTEX);
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|
|
|
std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
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|
vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32B32A32_SFLOAT, offsetof(Particle, pos)), // Location 0: Position
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|
vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32B32A32_SFLOAT, offsetof(Particle, color)), // Location 1: Color
|
|
vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32_SFLOAT, offsetof(Particle, alpha)), // Location 2: Alpha
|
|
vks::initializers::vertexInputAttributeDescription(0, 3, VK_FORMAT_R32_SFLOAT, offsetof(Particle, size)), // Location 3: Size
|
|
vks::initializers::vertexInputAttributeDescription(0, 4, VK_FORMAT_R32_SFLOAT, offsetof(Particle, rotation)), // Location 4: Rotation
|
|
vks::initializers::vertexInputAttributeDescription(0, 5, VK_FORMAT_R32_SINT, offsetof(Particle, type)), // Location 5: Particle type
|
|
};
|
|
|
|
VkPipelineVertexInputStateCreateInfo vertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
|
|
vertexInputState.vertexBindingDescriptionCount = 1;
|
|
vertexInputState.pVertexBindingDescriptions = &vertexInputBinding;
|
|
vertexInputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertexInputAttributes.size());
|
|
vertexInputState.pVertexAttributeDescriptions = vertexInputAttributes.data();
|
|
|
|
pipelineCI.pVertexInputState = &vertexInputState;
|
|
|
|
// Don t' write to depth buffer
|
|
depthStencilState.depthWriteEnable = VK_FALSE;
|
|
|
|
// Premulitplied alpha
|
|
blendAttachmentState.blendEnable = VK_TRUE;
|
|
blendAttachmentState.srcColorBlendFactor = VK_BLEND_FACTOR_ONE;
|
|
blendAttachmentState.dstColorBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA;
|
|
blendAttachmentState.colorBlendOp = VK_BLEND_OP_ADD;
|
|
blendAttachmentState.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE;
|
|
blendAttachmentState.dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO;
|
|
blendAttachmentState.alphaBlendOp = VK_BLEND_OP_ADD;
|
|
blendAttachmentState.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
|
|
|
|
shaderStages[0] = loadShader(getShadersPath() + "particlesystem/particle.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "particlesystem/particle.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.particles));
|
|
}
|
|
|
|
// Environment rendering pipeline (normal mapped)
|
|
{
|
|
// Vertex input state is taken from the glTF model loader
|
|
pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::UV, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::Tangent });
|
|
|
|
blendAttachmentState.blendEnable = VK_FALSE;
|
|
depthStencilState.depthWriteEnable = VK_TRUE;
|
|
inputAssemblyState.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
|
|
|
|
shaderStages[0] = loadShader(getShadersPath() + "particlesystem/normalmap.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "particlesystem/normalmap.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.environment));
|
|
}
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Vertex shader uniform buffer block
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffers.particles, sizeof(UniformDataParticles)));
|
|
// Vertex shader uniform buffer block
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffers.environment, sizeof(UniformDataEnvironment)));
|
|
// Map persistent
|
|
VK_CHECK_RESULT(uniformBuffers.particles.map());
|
|
VK_CHECK_RESULT(uniformBuffers.environment.map());
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
// Particle system fire
|
|
uniformDataParticles.projection = camera.matrices.perspective;
|
|
uniformDataParticles.modelView = camera.matrices.view;
|
|
uniformDataParticles.viewportDim = glm::vec2((float)width, (float)height);
|
|
memcpy(uniformBuffers.particles.mapped, &uniformDataParticles, sizeof(UniformDataParticles));
|
|
|
|
// Environment
|
|
uniformDataEnvironment.projection = camera.matrices.perspective;
|
|
uniformDataEnvironment.modelView = camera.matrices.view;
|
|
uniformDataEnvironment.normal = glm::inverseTranspose(uniformDataEnvironment.modelView);
|
|
// Update light position
|
|
if (!paused) {
|
|
uniformDataEnvironment.lightPos.x = sin(timer * 2.0f * float(M_PI)) * 1.5f;
|
|
uniformDataEnvironment.lightPos.y = 0.0f;
|
|
uniformDataEnvironment.lightPos.z = cos(timer * 2.0f * float(M_PI)) * 1.5f;
|
|
}
|
|
memcpy(uniformBuffers.environment.mapped, &uniformDataEnvironment, sizeof(UniformDataEnvironment));
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
loadAssets();
|
|
prepareParticles();
|
|
prepareUniformBuffers();
|
|
setupDescriptors();
|
|
preparePipelines();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
updateUniformBuffers();
|
|
if (!paused) {
|
|
updateParticles();
|
|
}
|
|
draw();
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|