Visual Update for computeparticles
Instead of using a small amount of large textured particles, use a large amount of small monochrome particles. Which uses a new vulkanexamplebase functionality of creating and updating a only device visible buffer via a temporary staging buffer.
This commit is contained in:
Voultapher
parent
eb428db92d
commit
5d7014b221
9 changed files with 203 additions and 209 deletions
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@ -283,6 +283,97 @@ VkPipelineShaderStageCreateInfo VulkanExampleBase::loadShader(std::string fileNa
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return shaderStage;
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}
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VkBool32 VulkanExampleBase::createDeviceBuffer(
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const VkBufferUsageFlags usage,
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const VkDeviceSize size,
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VkBuffer& buffer,
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VkDeviceMemory& memory,
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VkDescriptorBufferInfo& descriptor)
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{
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VkMemoryRequirements memReqs;
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VkMemoryAllocateInfo memAlloc = vkTools::initializers::memoryAllocateInfo();
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VkBufferCreateInfo bufferCreateInfo = vkTools::initializers::bufferCreateInfo(usage | VK_BUFFER_USAGE_TRANSFER_DST_BIT, size);
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VkResult err = vkCreateBuffer(device, &bufferCreateInfo, nullptr, &buffer);
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assert(!err);
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vkGetBufferMemoryRequirements(device, buffer, &memReqs);
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memAlloc.allocationSize = memReqs.size;
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getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAlloc.memoryTypeIndex);
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err = vkAllocateMemory(device, &memAlloc, nullptr, &memory);
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assert(!err);
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err = vkBindBufferMemory(device, buffer, memory, 0);
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assert(!err);
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descriptor.offset = 0;
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descriptor.buffer = buffer;
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descriptor.range = size;
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return VK_TRUE;
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}
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VkBool32 VulkanExampleBase::updateDeviceBuffer(
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const VkDeviceSize size,
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VkBuffer& deviceBuffer,
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void* data)
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{
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//todo check that size is not larger than memory size
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// create staging buffer and copy data to it
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VkMemoryRequirements memReqs;
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VkMemoryAllocateInfo memAlloc = vkTools::initializers::memoryAllocateInfo();
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VkBufferCreateInfo bufferCreateInfo = vkTools::initializers::bufferCreateInfo(VK_BUFFER_USAGE_TRANSFER_SRC_BIT, size);
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VkBuffer stagingBuffer;
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VkDeviceMemory stagingMemory;
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VkResult err = vkCreateBuffer(device, &bufferCreateInfo, nullptr, &stagingBuffer);
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assert(!err);
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vkGetBufferMemoryRequirements(device, stagingBuffer, &memReqs);
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memAlloc.allocationSize = memReqs.size;
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getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
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err = vkAllocateMemory(device, &memAlloc, nullptr, &stagingMemory);
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assert(!err);
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if (data != nullptr)
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{
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void* mapped;
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err = vkMapMemory(device, stagingMemory, 0, size, 0, &mapped);
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assert(!err);
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memcpy(mapped, data, size);
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vkUnmapMemory(device, stagingMemory);
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}
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err = vkBindBufferMemory(device, stagingBuffer, stagingMemory, 0);
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assert(!err);
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// create cmdbuffer to copy staging buffer to device local buffer
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createSetupCommandBuffer();
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VkBufferCopy copyRegion = {};
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copyRegion.size = size;
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vkCmdCopyBuffer(
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setupCmdBuffer,
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stagingBuffer,
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deviceBuffer,
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1,
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©Region);
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flushSetupCommandBuffer();
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// free staging memory
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vkDestroyBuffer(device, stagingBuffer, nullptr);
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vkFreeMemory(device, stagingMemory, nullptr);
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return VK_TRUE;
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}
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VkBool32 VulkanExampleBase::createBuffer(VkBufferUsageFlags usageFlags, VkMemoryPropertyFlags memoryPropertyFlags, VkDeviceSize size, void * data, VkBuffer * buffer, VkDeviceMemory * memory)
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{
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VkMemoryRequirements memReqs;
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@ -271,6 +271,20 @@ public:
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// Load a SPIR-V shader
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VkPipelineShaderStageCreateInfo loadShader(std::string fileName, VkShaderStageFlagBits stage);
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// create device local buffer and use staging to access
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VkBool32 createDeviceBuffer(
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const VkBufferUsageFlags usage,
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const VkDeviceSize size,
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VkBuffer& buffer,
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VkDeviceMemory& memory,
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VkDescriptorBufferInfo& descriptor);
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// update loacal buffer memory by creating a host visible staging buffer
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VkBool32 updateDeviceBuffer(
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const VkDeviceSize size,
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VkBuffer& deviceBuffer,
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void* data);
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// Create a buffer, fill it with data (if != NULL) and bind buffer memory
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VkBool32 createBuffer(
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VkBufferUsageFlags usageFlags,
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@ -11,6 +11,7 @@
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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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@ -22,15 +23,15 @@
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#define VERTEX_BUFFER_BIND_ID 0
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#define ENABLE_VALIDATION false
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#define PARTICLE_COUNT 8 * 1024
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#define PARTICLE_COUNT 3000 * 1024
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class VulkanExample : public VulkanExampleBase
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{
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private:
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vkTools::VulkanTexture textureColorMap;
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public:
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float timer = 0.0f;
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float animStart = 50.0f;
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float timer = 0.f;
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float animStart = 20.0f;
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bool animate = true;
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struct {
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@ -68,13 +69,11 @@ public:
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} uniformData;
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struct Particle {
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glm::vec4 pos;
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glm::vec4 col;
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glm::vec4 vel;
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glm::vec2 pos;
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glm::vec2 vel;
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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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@ -103,17 +102,6 @@ public:
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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(textureColorMap);
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}
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void loadTextures()
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{
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textureLoader->loadTexture(
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getAssetPath() + "textures/particle01_rgba.ktx",
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VK_FORMAT_R8G8B8A8_UNORM,
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&textureColorMap,
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false);
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}
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void buildCommandBuffers()
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@ -191,7 +179,6 @@ public:
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);
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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, &descriptorSetPostCompute, 0, NULL);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.postCompute);
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VkDeviceSize offsets[1] = { 0 };
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@ -243,9 +230,6 @@ public:
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err = swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete);
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assert(!err);
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err = vkQueueWaitIdle(queue);
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assert(!err);
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// Compute
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VkSubmitInfo computeSubmitInfo = vkTools::initializers::submitInfo();
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computeSubmitInfo.commandBufferCount = 1;
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@ -254,6 +238,9 @@ public:
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err = vkQueueSubmit(computeQueue, 1, &computeSubmitInfo, VK_NULL_HANDLE);
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assert(!err);
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err = vkQueueWaitIdle(queue);
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assert(!err);
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err = vkQueueWaitIdle(computeQueue);
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assert(!err);
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}
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@ -262,93 +249,25 @@ public:
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// vertex positions and velocities
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void prepareStorageBuffers()
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{
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float destPosX = 0.0f;
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float destPosY = 0.0f;
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std::mt19937 rGenerator;
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std::uniform_real_distribution<float> rDistribution(-1.f, 1.f);
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// Initial particle positions
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std::vector<Particle> particleBuffer;
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for (int i = 0; i < PARTICLE_COUNT; ++i)
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std::vector<Particle> particleBuffer(PARTICLE_COUNT);
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for (auto& element : particleBuffer)
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{
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// Position
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float aspectRatio = (float)height / (float)width;
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float rndVal = (float)rand() / (float)(RAND_MAX / (360.0f * 3.14f * 2.0f));
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float rndRad = (float)rand() / (float)(RAND_MAX) * 0.5f;
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Particle p;
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p.pos = glm::vec4(
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destPosX + cos(rndVal) * rndRad * aspectRatio,
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destPosY + sin(rndVal) * rndRad,
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0.0f,
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1.0f);
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p.col = glm::vec4(
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(float)(rand() % 255) / 255.0f,
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(float)(rand() % 255) / 255.0f,
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(float)(rand() % 255) / 255.0f,
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1.0f);
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p.vel = glm::vec4(0.0f);
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particleBuffer.push_back(p);
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element.pos = glm::vec2(rDistribution(rGenerator), rDistribution(rGenerator));
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element.vel = glm::vec2(0.f);
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}
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// Buffer size is the same for all storage buffers
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uint32_t storageBufferSize = particleBuffer.size() * sizeof(Particle);
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VkMemoryAllocateInfo memAlloc = vkTools::initializers::memoryAllocateInfo();
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VkMemoryRequirements memReqs;
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createDeviceBuffer(VK_BUFFER_USAGE_STORAGE_BUFFER_BIT, storageBufferSize, computeStorageBuffer.buffer,
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computeStorageBuffer.memory, computeStorageBuffer.descriptor);
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VkResult err;
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void *data;
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struct StagingBuffer {
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VkDeviceMemory memory;
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VkBuffer buffer;
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} stagingBuffer;
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// Allocate and fill host-visible staging storage buffer object
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// Allocate and fill storage buffer object
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VkBufferCreateInfo vBufferInfo =
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vkTools::initializers::bufferCreateInfo(
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VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
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storageBufferSize);
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vkTools::checkResult(vkCreateBuffer(device, &vBufferInfo, nullptr, &stagingBuffer.buffer));
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vkGetBufferMemoryRequirements(device, stagingBuffer.buffer, &memReqs);
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memAlloc.allocationSize = memReqs.size;
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getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
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vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &stagingBuffer.memory));
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vkTools::checkResult(vkMapMemory(device, stagingBuffer.memory, 0, storageBufferSize, 0, &data));
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memcpy(data, particleBuffer.data(), storageBufferSize);
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vkUnmapMemory(device, stagingBuffer.memory);
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vkTools::checkResult(vkBindBufferMemory(device, stagingBuffer.buffer, stagingBuffer.memory, 0));
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// Allocate device local storage buffer ojbect
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vBufferInfo.usage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
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vkTools::checkResult(vkCreateBuffer(device, &vBufferInfo, nullptr, &computeStorageBuffer.buffer));
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vkGetBufferMemoryRequirements(device, computeStorageBuffer.buffer, &memReqs);
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memAlloc.allocationSize = memReqs.size;
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getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAlloc.memoryTypeIndex);
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vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &computeStorageBuffer.memory));
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vkTools::checkResult(vkBindBufferMemory(device, computeStorageBuffer.buffer, computeStorageBuffer.memory, 0));
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// Copy from host to device
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createSetupCommandBuffer();
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VkBufferCopy copyRegion = {};
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copyRegion.size = storageBufferSize;
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vkCmdCopyBuffer(
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setupCmdBuffer,
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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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flushSetupCommandBuffer();
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// Destroy staging buffer
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vkDestroyBuffer(device, stagingBuffer.buffer, nullptr);
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vkFreeMemory(device, stagingBuffer.memory, nullptr);
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computeStorageBuffer.descriptor.buffer = computeStorageBuffer.buffer;
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computeStorageBuffer.descriptor.offset = 0;
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computeStorageBuffer.descriptor.range = storageBufferSize;
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updateDeviceBuffer(storageBufferSize, computeStorageBuffer.buffer, particleBuffer.data());
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// Binding description
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vertices.bindingDescriptions.resize(1);
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@ -360,7 +279,7 @@ public:
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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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vertices.attributeDescriptions.resize(1);
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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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@ -368,13 +287,6 @@ public:
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0,
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VK_FORMAT_R32G32B32A32_SFLOAT,
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0);
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// Location 1 : Color
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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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sizeof(float) * 4);
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// Assign to vertex buffer
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vertices.inputState = vkTools::initializers::pipelineVertexInputStateCreateInfo();
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@ -389,15 +301,14 @@ 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_STORAGE_BUFFER, 1),
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1)
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vkTools::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1)
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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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3);
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2);
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VkResult vkRes = vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool);
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assert(!vkRes);
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@ -405,63 +316,26 @@ public:
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void setupDescriptorSetLayout()
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{
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings =
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{
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// Binding 0 : Fragment shader image 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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0)
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};
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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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VkDescriptorSetLayoutCreateInfo descriptorLayoutInfo;
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descriptorLayoutInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
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descriptorLayoutInfo.pNext = NULL;
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descriptorLayoutInfo.flags = 0;
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descriptorLayoutInfo.bindingCount = 0;
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descriptorLayoutInfo.pBindings = nullptr;
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VkResult err = vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout);
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VkResult err = vkCreateDescriptorSetLayout(device, &descriptorLayoutInfo, nullptr, &descriptorSetLayout);
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assert(!err);
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VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
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vkTools::initializers::pipelineLayoutCreateInfo(
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&descriptorSetLayout,
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1);
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0);
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err = vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout);
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assert(!err);
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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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VkResult vkRes = vkAllocateDescriptorSets(device, &allocInfo, &descriptorSetPostCompute);
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assert(!vkRes);
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// Image descriptor for the color map texture
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VkDescriptorImageInfo texDescriptor =
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vkTools::initializers::descriptorImageInfo(
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textureColorMap.sampler,
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textureColorMap.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 1 : Fragment shader image sampler
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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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&texDescriptor)
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};
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vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, NULL);
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}
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// Create a separate command buffer for compute commands
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void createComputeCommandBuffer()
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{
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@ -504,16 +378,16 @@ public:
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VkPipelineDepthStencilStateCreateInfo depthStencilState =
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vkTools::initializers::pipelineDepthStencilStateCreateInfo(
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VK_TRUE,
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VK_TRUE,
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VK_COMPARE_OP_LESS_OR_EQUAL);
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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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VK_SAMPLE_COUNT_4_BIT,
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0);
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std::vector<VkDynamicState> dynamicStateEnables = {
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@ -650,27 +524,34 @@ public:
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void prepareUniformBuffers()
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{
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// Compute shader uniform buffer block
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createBuffer(
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createDeviceBuffer(
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VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
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sizeof(computeUbo),
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&computeUbo,
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&uniformData.computeShader.ubo.buffer,
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&uniformData.computeShader.ubo.memory,
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&uniformData.computeShader.ubo.descriptor);
|
||||
uniformData.computeShader.ubo.buffer,
|
||||
uniformData.computeShader.ubo.memory,
|
||||
uniformData.computeShader.ubo.descriptor);
|
||||
updateDeviceBuffer(sizeof(computeUbo), uniformData.computeShader.ubo.buffer, &computeUbo);
|
||||
|
||||
updateUniformBuffers();
|
||||
}
|
||||
|
||||
void updateUniformBuffers()
|
||||
{
|
||||
computeUbo.deltaT = frameTimer * 5.0f;
|
||||
computeUbo.deltaT = frameTimer * 4.0f;
|
||||
if (animate) // tmp
|
||||
{
|
||||
computeUbo.destX = sin(glm::radians(timer*360.0)) * 0.75f;
|
||||
computeUbo.destY = 0;
|
||||
uint8_t *pData;
|
||||
VkResult err = vkMapMemory(device, uniformData.computeShader.ubo.memory, 0, sizeof(computeUbo), 0, (void **)&pData);
|
||||
assert(!err);
|
||||
memcpy(pData, &computeUbo, sizeof(computeUbo));
|
||||
vkUnmapMemory(device, uniformData.computeShader.ubo.memory);
|
||||
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;
|
||||
}
|
||||
|
||||
updateDeviceBuffer(sizeof(computeUbo), uniformData.computeShader.ubo.buffer, &computeUbo);
|
||||
}
|
||||
|
||||
// Find and create a compute capable device queue
|
||||
|
|
@ -693,6 +574,8 @@ public:
|
|||
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);
|
||||
|
|
@ -701,7 +584,6 @@ public:
|
|||
void prepare()
|
||||
{
|
||||
VulkanExampleBase::prepare();
|
||||
loadTextures();
|
||||
getComputeQueue();
|
||||
createComputeCommandBuffer();
|
||||
prepareStorageBuffers();
|
||||
|
|
@ -709,7 +591,6 @@ public:
|
|||
setupDescriptorSetLayout();
|
||||
preparePipelines();
|
||||
setupDescriptorPool();
|
||||
setupDescriptorSet();
|
||||
prepareCompute();
|
||||
buildCommandBuffers();
|
||||
buildComputeCommandBuffer();
|
||||
|
|
@ -723,16 +604,18 @@ public:
|
|||
vkDeviceWaitIdle(device);
|
||||
draw();
|
||||
vkDeviceWaitIdle(device);
|
||||
|
||||
if (animate)
|
||||
{
|
||||
if (animStart > 0.0f)
|
||||
{
|
||||
animStart -= frameTimer * 5.0f;
|
||||
}
|
||||
if ((animate) & (animStart <= 0.0f))
|
||||
else if (animStart <= 0.0f)
|
||||
{
|
||||
timer += frameTimer * 0.1f;
|
||||
if (timer > 1.0)
|
||||
{
|
||||
timer -= 1.0f;
|
||||
timer += frameTimer * 0.04f;
|
||||
if (timer > 1.f)
|
||||
timer = 0.f;
|
||||
}
|
||||
}
|
||||
updateUniformBuffers();
|
||||
|
|
|
|||
|
|
@ -5,9 +5,8 @@
|
|||
|
||||
struct Particle
|
||||
{
|
||||
vec4 pos;
|
||||
vec4 col;
|
||||
vec4 vel;
|
||||
vec2 pos;
|
||||
vec2 vel;
|
||||
};
|
||||
|
||||
// Binding 0 : Position storage buffer
|
||||
|
|
@ -26,14 +25,21 @@ layout (binding = 1) uniform UBO
|
|||
int particleCount;
|
||||
} ubo;
|
||||
|
||||
vec3 attraction(vec3 pos, vec3 attractPos)
|
||||
vec2 attraction(vec2 pos, vec2 attractPos)
|
||||
{
|
||||
vec3 delta = attractPos - pos;
|
||||
vec2 delta = attractPos - pos;
|
||||
const float damp = 0.5;
|
||||
float dDampedDot = dot(delta, delta) + damp;
|
||||
float invDist = 1.0f / sqrt(dDampedDot);
|
||||
float invDistCubed = invDist*invDist*invDist;
|
||||
return delta * invDistCubed * 0.00035;
|
||||
return delta * invDistCubed * 0.0035;
|
||||
}
|
||||
|
||||
vec2 repulsion(vec2 pos, vec2 attractPos)
|
||||
{
|
||||
vec2 delta = attractPos - pos;
|
||||
float targetDistance = sqrt(dot(delta, delta));
|
||||
return delta * (1.0 / (targetDistance * targetDistance * targetDistance)) * -0.000035;
|
||||
}
|
||||
|
||||
void main()
|
||||
|
|
@ -45,22 +51,25 @@ void main()
|
|||
return;
|
||||
|
||||
// Read position and velocity
|
||||
vec3 vPos = particles[index].pos.xyz;
|
||||
vec3 vVel = particles[index].vel.xyz;
|
||||
vec2 vVel = particles[index].vel.xy;
|
||||
vec2 vPos = particles[index].pos.xy;
|
||||
|
||||
vec3 destPos = vec3(ubo.destX, ubo.destY, 0.0);
|
||||
vec2 destPos = vec2(ubo.destX, ubo.destY);
|
||||
|
||||
// Calculate new velocity depending on attraction point
|
||||
vVel += attraction(vPos, destPos.xyz);
|
||||
vec2 delta = destPos - vPos;
|
||||
float targetDistance = sqrt(dot(delta, delta));
|
||||
vVel += repulsion(vPos, destPos.xy) * 0.05;
|
||||
|
||||
// Move by velocity
|
||||
vPos += vVel * ubo.deltaT;
|
||||
|
||||
if ((vPos.x < -1.0) || (vPos.x > 1.0))
|
||||
vVel.x -= vVel.x;
|
||||
// collide with boundary
|
||||
if ((vPos.x < -1.0) || (vPos.x > 1.0) || (vPos.y < -1.0) || (vPos.y > 1.0))
|
||||
vVel = (-vVel * 0.1) + attraction(vPos, destPos) * 12;
|
||||
else
|
||||
particles[index].pos.xy = vPos;
|
||||
|
||||
// Write back
|
||||
particles[index].pos.xyz = vPos;
|
||||
particles[index].vel.xyz = vVel;
|
||||
particles[index].vel.xy = vVel;
|
||||
}
|
||||
|
||||
|
|
|
|||
Binary file not shown.
|
|
@ -3,13 +3,11 @@
|
|||
#extension GL_ARB_separate_shader_objects : enable
|
||||
#extension GL_ARB_shading_language_420pack : enable
|
||||
|
||||
layout (binding = 0) uniform sampler2D sColorMap;
|
||||
|
||||
layout (location = 0) in vec4 inColor;
|
||||
|
||||
layout (location = 0) out vec4 outFragColor;
|
||||
|
||||
void main ()
|
||||
{
|
||||
outFragColor = texture(sColorMap, gl_PointCoord) * inColor;
|
||||
outFragColor = inColor;
|
||||
}
|
||||
|
|
|
|||
Binary file not shown.
|
|
@ -4,13 +4,12 @@
|
|||
#extension GL_ARB_shading_language_420pack : enable
|
||||
|
||||
layout (location = 0) in vec4 inPos;
|
||||
layout (location = 1) in vec4 inColor;
|
||||
|
||||
layout (location = 0) out vec4 outColor;
|
||||
|
||||
void main ()
|
||||
{
|
||||
gl_PointSize = 32.0;
|
||||
outColor = inColor;
|
||||
gl_Position = vec4(inPos.xyz, 1.0);
|
||||
gl_PointSize = 1.0;
|
||||
outColor = vec4(0.035);
|
||||
gl_Position = vec4(inPos.xy, 1.0, 1.0);
|
||||
}
|
||||
Binary file not shown.
Loading…
Add table
Add a link
Reference in a new issue