346 lines
No EOL
14 KiB
C++
346 lines
No EOL
14 KiB
C++
/*
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* Vulkan Example - Physical based shading basics
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*
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* See http://graphicrants.blogspot.de/2013/08/specular-brdf-reference.html for a good reference to the different functions that make up a specular BRDF
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*
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* Copyright (C) 2017-2024 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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struct Material {
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// Parameter block used as push constant block
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struct PushBlock {
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float roughness;
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float metallic;
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float r, g, b;
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} params{};
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std::string name;
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Material() {};
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Material(std::string n, glm::vec3 c, float r, float m) : name(n) {
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params.roughness = r;
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params.metallic = m;
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params.r = c.r;
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params.g = c.g;
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params.b = c.b;
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};
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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 Meshes {
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std::vector<vkglTF::Model> objects;
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int32_t objectIndex = 0;
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} models;
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struct {
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vks::Buffer object;
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vks::Buffer params;
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} uniformBuffers;
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struct UBOMatrices {
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glm::mat4 projection;
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glm::mat4 model;
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glm::mat4 view;
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glm::vec3 camPos;
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} uboMatrices;
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struct UBOParams {
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glm::vec4 lights[4];
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} uboParams;
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VkPipelineLayout pipelineLayout{ VK_NULL_HANDLE };
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VkPipeline pipeline{ VK_NULL_HANDLE };
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VkDescriptorSetLayout descriptorSetLayout{ VK_NULL_HANDLE };
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VkDescriptorSet descriptorSet{ VK_NULL_HANDLE };
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// Default materials to select from
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std::vector<Material> materials;
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int32_t materialIndex = 0;
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std::vector<std::string> materialNames;
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std::vector<std::string> objectNames;
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VulkanExample() : VulkanExampleBase()
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{
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title = "Physical based shading basics";
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camera.type = Camera::CameraType::firstperson;
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camera.setPosition(glm::vec3(10.0f, 13.0f, 1.8f));
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camera.setRotation(glm::vec3(-62.5f, 90.0f, 0.0f));
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camera.movementSpeed = 4.0f;
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
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camera.rotationSpeed = 0.25f;
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timerSpeed *= 0.25f;
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// Setup some default materials (source: https://seblagarde.wordpress.com/2011/08/17/feeding-a-physical-based-lighting-mode/)
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materials.push_back(Material("Gold", glm::vec3(1.0f, 0.765557f, 0.336057f), 0.1f, 1.0f));
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materials.push_back(Material("Copper", glm::vec3(0.955008f, 0.637427f, 0.538163f), 0.1f, 1.0f));
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materials.push_back(Material("Chromium", glm::vec3(0.549585f, 0.556114f, 0.554256f), 0.1f, 1.0f));
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materials.push_back(Material("Nickel", glm::vec3(0.659777f, 0.608679f, 0.525649f), 0.1f, 1.0f));
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materials.push_back(Material("Titanium", glm::vec3(0.541931f, 0.496791f, 0.449419f), 0.1f, 1.0f));
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materials.push_back(Material("Cobalt", glm::vec3(0.662124f, 0.654864f, 0.633732f), 0.1f, 1.0f));
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materials.push_back(Material("Platinum", glm::vec3(0.672411f, 0.637331f, 0.585456f), 0.1f, 1.0f));
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// Testing materials
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materials.push_back(Material("White", glm::vec3(1.0f), 0.1f, 1.0f));
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materials.push_back(Material("Red", glm::vec3(1.0f, 0.0f, 0.0f), 0.1f, 1.0f));
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materials.push_back(Material("Blue", glm::vec3(0.0f, 0.0f, 1.0f), 0.1f, 1.0f));
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materials.push_back(Material("Black", glm::vec3(0.0f), 0.1f, 1.0f));
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for (auto material : materials) {
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materialNames.push_back(material.name);
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}
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objectNames = { "Sphere", "Teapot", "Torusknot", "Venus" };
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materialIndex = 0;
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}
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~VulkanExample()
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{
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if (device) {
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vkDestroyPipeline(device, pipeline, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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uniformBuffers.object.destroy();
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uniformBuffers.params.destroy();
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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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// Draw a grid of spheres using varying material parameters
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
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Material mat = materials[materialIndex];
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const uint32_t gridSize = 7;
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// Render a 2D grid of objects with varying PBR parameters
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for (uint32_t y = 0; y < gridSize; y++) {
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for (uint32_t x = 0; x < gridSize; x++) {
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glm::vec3 pos = glm::vec3(float(x - (gridSize / 2.0f)) * 2.5f, 0.0f, float(y - (gridSize / 2.0f)) * 2.5f);
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vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(glm::vec3), &pos);
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// Vary metallic and roughness, two important PBR parameters
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mat.params.metallic = glm::clamp((float)x / (float)(gridSize - 1), 0.1f, 1.0f);
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mat.params.roughness = glm::clamp((float)y / (float)(gridSize - 1), 0.05f, 1.0f);
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vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(glm::vec3), sizeof(Material::PushBlock), &mat);
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models.objects[models.objectIndex].draw(drawCmdBuffers[i]);
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}
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}
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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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void loadAssets()
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{
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std::vector<std::string> filenames = { "sphere.gltf", "teapot.gltf", "torusknot.gltf", "venus.gltf" };
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models.objects.resize(filenames.size());
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for (size_t i = 0; i < filenames.size(); i++) {
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models.objects[i].loadFromFile(getAssetPath() + "models/" + filenames[i], vulkanDevice, queue, vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::FlipY);
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}
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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, 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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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0),
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_FRAGMENT_BIT, 1),
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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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// Set
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VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
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vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.object.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1, &uniformBuffers.params.descriptor),
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};
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vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
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}
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void preparePipelines()
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{
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// Layout
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// We use push constant to pass material information
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VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
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std::vector<VkPushConstantRange> pushConstantRanges = {
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vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(glm::vec3), 0),
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vks::initializers::pushConstantRange(VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(Material::PushBlock), sizeof(glm::vec3)),
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};
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pipelineLayoutCreateInfo.pushConstantRangeCount = 2;
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pipelineLayoutCreateInfo.pPushConstantRanges = pushConstantRanges.data();
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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// Pipeline
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_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);
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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_FALSE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1);
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VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
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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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VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass);
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std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
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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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pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal });
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// PBR pipeline
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shaderStages[0] = loadShader(getShadersPath() + "pbrbasic/pbr.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getShadersPath() + "pbrbasic/pbr.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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// Enable depth test and write
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depthStencilState.depthWriteEnable = VK_TRUE;
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depthStencilState.depthTestEnable = VK_TRUE;
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
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}
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// Prepare and initialize uniform buffer containing shader uniforms
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void prepareUniformBuffers()
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{
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// Object vertex shader uniform buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffers.object, sizeof(uboMatrices)));
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// Shared parameter uniform buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffers.params, sizeof(uboParams)));
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// Map persistent
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VK_CHECK_RESULT(uniformBuffers.object.map());
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VK_CHECK_RESULT(uniformBuffers.params.map());
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}
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void updateUniformBuffers()
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{
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// 3D object
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uboMatrices.projection = camera.matrices.perspective;
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uboMatrices.view = camera.matrices.view;
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uboMatrices.model = glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f + (models.objectIndex == 1 ? 45.0f : 0.0f)), glm::vec3(0.0f, 1.0f, 0.0f));
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uboMatrices.camPos = camera.position * -1.0f;
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memcpy(uniformBuffers.object.mapped, &uboMatrices, sizeof(uboMatrices));
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}
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void updateLights()
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{
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const float p = 15.0f;
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uboParams.lights[0] = glm::vec4(-p, -p*0.5f, -p, 1.0f);
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uboParams.lights[1] = glm::vec4(-p, -p*0.5f, p, 1.0f);
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uboParams.lights[2] = glm::vec4( p, -p*0.5f, p, 1.0f);
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uboParams.lights[3] = glm::vec4( p, -p*0.5f, -p, 1.0f);
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if (!paused)
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{
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uboParams.lights[0].x = sin(glm::radians(timer * 360.0f)) * 20.0f;
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uboParams.lights[0].z = cos(glm::radians(timer * 360.0f)) * 20.0f;
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uboParams.lights[1].x = cos(glm::radians(timer * 360.0f)) * 20.0f;
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uboParams.lights[1].y = sin(glm::radians(timer * 360.0f)) * 20.0f;
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}
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memcpy(uniformBuffers.params.mapped, &uboParams, sizeof(uboParams));
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}
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void draw()
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{
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VulkanExampleBase::prepareFrame();
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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VulkanExampleBase::submitFrame();
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}
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void prepare()
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{
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VulkanExampleBase::prepare();
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loadAssets();
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prepareUniformBuffers();
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setupDescriptors();
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preparePipelines();
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buildCommandBuffers();
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prepared = true;
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}
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virtual void render()
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{
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if (!prepared)
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return;
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updateUniformBuffers();
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if (!paused) {
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updateLights();
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}
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draw();
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}
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virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
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{
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if (overlay->header("Settings")) {
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if (overlay->comboBox("Material", &materialIndex, materialNames)) {
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buildCommandBuffers();
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}
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if (overlay->comboBox("Object type", &models.objectIndex, objectNames)) {
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updateUniformBuffers();
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buildCommandBuffers();
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}
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}
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}
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};
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VULKAN_EXAMPLE_MAIN() |