708 lines
29 KiB
C++
708 lines
29 KiB
C++
/*
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* Vulkan Example - Omni directional shadows using a dynamic cube map
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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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class VulkanExample : public VulkanExampleBase
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{
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public:
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bool displayCubeMap{ false };
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// Defines the depth range used for the shadow maps
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// This should be kept as small as possible for precision
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float zNear{ 0.1f };
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float zFar{ 1024.0f };
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struct {
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vkglTF::Model scene;
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vkglTF::Model debugcube;
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} models;
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glm::vec4 lightPos = glm::vec4(0.0f, -2.5f, 0.0f, 1.0);
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struct UniformData {
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glm::mat4 projection;
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glm::mat4 view;
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glm::mat4 model;
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glm::vec4 lightPos;
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};
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UniformData uniformDataScene, uniformDataOffscreen;
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struct {
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vks::Buffer scene;
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vks::Buffer offscreen;
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} uniformBuffers;
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struct {
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VkPipeline scene{ VK_NULL_HANDLE };
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VkPipeline offscreen{ VK_NULL_HANDLE };
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VkPipeline cubemapDisplay{ VK_NULL_HANDLE };
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} pipelines;
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struct {
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VkPipelineLayout scene{ VK_NULL_HANDLE };
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VkPipelineLayout offscreen{ VK_NULL_HANDLE };
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} pipelineLayouts;
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struct {
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VkDescriptorSet scene{ VK_NULL_HANDLE };
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VkDescriptorSet offscreen{ VK_NULL_HANDLE };
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} descriptorSets;
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VkDescriptorSetLayout descriptorSetLayout{ VK_NULL_HANDLE };
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vks::Texture shadowCubeMap;
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std::array<VkImageView, 6> shadowCubeMapFaceImageViews{};
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// Framebuffer for offscreen rendering
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struct FrameBufferAttachment {
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VkImage image;
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VkDeviceMemory mem;
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VkImageView view;
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};
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struct OffscreenPass {
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int32_t width, height;
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std::array<VkFramebuffer, 6> frameBuffers;
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FrameBufferAttachment depth;
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VkRenderPass renderPass;
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VkSampler sampler;
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VkDescriptorImageInfo descriptor;
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} offscreenPass;
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// Size of the shadow map texture (per face)
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const uint32_t offscreenImageSize{ 1024 };
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// We use a 32 bit float format for max. precision. Depending on the use case, lower precision may be fine and can save bandwidth
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const VkFormat offscreenImageFormat{ VK_FORMAT_R32_SFLOAT };
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// The depth format is selected at runtime
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VkFormat offscreenDepthFormat{ VK_FORMAT_UNDEFINED };
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VulkanExample() : VulkanExampleBase()
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{
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title = "Point light shadows (cubemap)";
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camera.type = Camera::CameraType::lookat;
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camera.setPerspective(45.0f, (float)width / (float)height, zNear, zFar);
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camera.setRotation(glm::vec3(-20.5f, -673.0f, 0.0f));
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camera.setPosition(glm::vec3(0.0f, 0.5f, -15.0f));
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timerSpeed *= 0.5f;
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}
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~VulkanExample()
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{
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if (device) {
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// Cube map
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for (uint32_t i = 0; i < 6; i++) {
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vkDestroyImageView(device, shadowCubeMapFaceImageViews[i], nullptr);
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}
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vkDestroyImageView(device, shadowCubeMap.view, nullptr);
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vkDestroyImage(device, shadowCubeMap.image, nullptr);
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vkDestroySampler(device, shadowCubeMap.sampler, nullptr);
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vkFreeMemory(device, shadowCubeMap.deviceMemory, nullptr);
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// Depth attachment
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vkDestroyImageView(device, offscreenPass.depth.view, nullptr);
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vkDestroyImage(device, offscreenPass.depth.image, nullptr);
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vkFreeMemory(device, offscreenPass.depth.mem, nullptr);
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for (uint32_t i = 0; i < 6; i++)
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{
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vkDestroyFramebuffer(device, offscreenPass.frameBuffers[i], nullptr);
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}
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vkDestroyRenderPass(device, offscreenPass.renderPass, nullptr);
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// Pipelines
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vkDestroyPipeline(device, pipelines.scene, nullptr);
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vkDestroyPipeline(device, pipelines.offscreen, nullptr);
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vkDestroyPipeline(device, pipelines.cubemapDisplay, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayouts.scene, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayouts.offscreen, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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// Uniform buffers
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uniformBuffers.offscreen.destroy();
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uniformBuffers.scene.destroy();
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}
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}
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void prepareCubeMap()
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{
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shadowCubeMap.width = offscreenImageSize;
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shadowCubeMap.height = offscreenImageSize;
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// Cube map image description
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VkImageCreateInfo imageCreateInfo = vks::initializers::imageCreateInfo();
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imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
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imageCreateInfo.format = offscreenImageFormat;
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imageCreateInfo.extent = { shadowCubeMap.width, shadowCubeMap.height, 1 };
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imageCreateInfo.mipLevels = 1;
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imageCreateInfo.arrayLayers = 6;
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imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
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imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
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imageCreateInfo.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
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imageCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
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imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
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imageCreateInfo.flags = VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT;
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VkMemoryAllocateInfo memAllocInfo = vks::initializers::memoryAllocateInfo();
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VkMemoryRequirements memReqs;
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VkCommandBuffer layoutCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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// Create cube map image
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VK_CHECK_RESULT(vkCreateImage(device, &imageCreateInfo, nullptr, &shadowCubeMap.image));
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vkGetImageMemoryRequirements(device, shadowCubeMap.image, &memReqs);
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memAllocInfo.allocationSize = memReqs.size;
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memAllocInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memAllocInfo, nullptr, &shadowCubeMap.deviceMemory));
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VK_CHECK_RESULT(vkBindImageMemory(device, shadowCubeMap.image, shadowCubeMap.deviceMemory, 0));
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// Image barrier for optimal image (target)
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VkImageSubresourceRange subresourceRange = {};
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subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
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subresourceRange.baseMipLevel = 0;
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subresourceRange.levelCount = 1;
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subresourceRange.layerCount = 6;
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vks::tools::setImageLayout(
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layoutCmd,
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shadowCubeMap.image,
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VK_IMAGE_LAYOUT_UNDEFINED,
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VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
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subresourceRange);
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vulkanDevice->flushCommandBuffer(layoutCmd, queue, true);
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// Create sampler
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VkSamplerCreateInfo sampler = vks::initializers::samplerCreateInfo();
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sampler.magFilter = VK_FILTER_LINEAR;
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sampler.minFilter = VK_FILTER_LINEAR;
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sampler.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
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sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER;
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sampler.addressModeV = sampler.addressModeU;
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sampler.addressModeW = sampler.addressModeU;
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sampler.mipLodBias = 0.0f;
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sampler.maxAnisotropy = 1.0f;
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sampler.compareOp = VK_COMPARE_OP_NEVER;
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sampler.minLod = 0.0f;
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sampler.maxLod = 1.0f;
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sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
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VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &shadowCubeMap.sampler));
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// Create image view
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VkImageViewCreateInfo view = vks::initializers::imageViewCreateInfo();
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view.image = VK_NULL_HANDLE;
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view.viewType = VK_IMAGE_VIEW_TYPE_CUBE;
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view.format = offscreenImageFormat;
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view.components = { VK_COMPONENT_SWIZZLE_R };
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view.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
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view.subresourceRange.layerCount = 6;
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view.image = shadowCubeMap.image;
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VK_CHECK_RESULT(vkCreateImageView(device, &view, nullptr, &shadowCubeMap.view));
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view.viewType = VK_IMAGE_VIEW_TYPE_2D;
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view.subresourceRange.layerCount = 1;
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view.image = shadowCubeMap.image;
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for (uint32_t i = 0; i < 6; i++)
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{
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view.subresourceRange.baseArrayLayer = i;
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VK_CHECK_RESULT(vkCreateImageView(device, &view, nullptr, &shadowCubeMapFaceImageViews[i]));
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}
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}
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// Set up a separate render pass for the offscreen frame buffer
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// This is necessary as the offscreen frame buffer attachments
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// use formats different to the ones from the visible frame buffer
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// and at least the depth one may not be compatible
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void prepareOffscreenRenderpass()
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{
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VkAttachmentDescription osAttachments[2] = {};
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// Find a suitable depth format for
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VkBool32 validDepthFormat = vks::tools::getSupportedDepthFormat(physicalDevice, &offscreenDepthFormat);
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assert(validDepthFormat);
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osAttachments[0].format = offscreenImageFormat;
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osAttachments[0].samples = VK_SAMPLE_COUNT_1_BIT;
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osAttachments[0].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
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osAttachments[0].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
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osAttachments[0].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
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osAttachments[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
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osAttachments[0].initialLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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osAttachments[0].finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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// Depth attachment
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osAttachments[1].format = offscreenDepthFormat;
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osAttachments[1].samples = VK_SAMPLE_COUNT_1_BIT;
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osAttachments[1].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
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osAttachments[1].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
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osAttachments[1].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
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osAttachments[1].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
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osAttachments[1].initialLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
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osAttachments[1].finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
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VkAttachmentReference colorReference = {};
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colorReference.attachment = 0;
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colorReference.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
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VkAttachmentReference depthReference = {};
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depthReference.attachment = 1;
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depthReference.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
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VkSubpassDescription subpass = {};
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subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
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subpass.colorAttachmentCount = 1;
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subpass.pColorAttachments = &colorReference;
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subpass.pDepthStencilAttachment = &depthReference;
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VkRenderPassCreateInfo renderPassCreateInfo = vks::initializers::renderPassCreateInfo();
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renderPassCreateInfo.attachmentCount = 2;
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renderPassCreateInfo.pAttachments = osAttachments;
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renderPassCreateInfo.subpassCount = 1;
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renderPassCreateInfo.pSubpasses = &subpass;
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VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassCreateInfo, nullptr, &offscreenPass.renderPass));
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}
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// Prepare a new framebuffer for offscreen rendering
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// The contents of this framebuffer are then
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// copied to the different cube map faces
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void prepareOffscreenFramebuffer()
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{
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offscreenPass.width = offscreenImageSize;
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offscreenPass.height = offscreenImageSize;
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// Color attachment
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VkImageCreateInfo imageCreateInfo = vks::initializers::imageCreateInfo();
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imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
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imageCreateInfo.format = offscreenImageFormat;
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imageCreateInfo.extent.width = offscreenPass.width;
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imageCreateInfo.extent.height = offscreenPass.height;
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imageCreateInfo.extent.depth = 1;
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imageCreateInfo.mipLevels = 1;
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imageCreateInfo.arrayLayers = 1;
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imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
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imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
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// Image of the framebuffer is blit source
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imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
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imageCreateInfo.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
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imageCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
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VkImageViewCreateInfo colorImageView = vks::initializers::imageViewCreateInfo();
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colorImageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
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colorImageView.format = offscreenImageFormat;
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colorImageView.flags = 0;
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colorImageView.subresourceRange = {};
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colorImageView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
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colorImageView.subresourceRange.baseMipLevel = 0;
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colorImageView.subresourceRange.levelCount = 1;
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colorImageView.subresourceRange.baseArrayLayer = 0;
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colorImageView.subresourceRange.layerCount = 1;
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VkCommandBuffer layoutCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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// Depth stencil attachment
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imageCreateInfo.format = offscreenDepthFormat;
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imageCreateInfo.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
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VkImageViewCreateInfo depthStencilView = vks::initializers::imageViewCreateInfo();
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depthStencilView.viewType = VK_IMAGE_VIEW_TYPE_2D;
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depthStencilView.format = offscreenDepthFormat;
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depthStencilView.flags = 0;
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depthStencilView.subresourceRange = {};
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depthStencilView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
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if (offscreenDepthFormat >= VK_FORMAT_D16_UNORM_S8_UINT) {
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depthStencilView.subresourceRange.aspectMask |= VK_IMAGE_ASPECT_STENCIL_BIT;
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}
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depthStencilView.subresourceRange.baseMipLevel = 0;
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depthStencilView.subresourceRange.levelCount = 1;
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depthStencilView.subresourceRange.baseArrayLayer = 0;
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depthStencilView.subresourceRange.layerCount = 1;
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VK_CHECK_RESULT(vkCreateImage(device, &imageCreateInfo, nullptr, &offscreenPass.depth.image));
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VkMemoryRequirements memReqs;
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vkGetImageMemoryRequirements(device, offscreenPass.depth.image, &memReqs);
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VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
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memAlloc.allocationSize = memReqs.size;
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memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &offscreenPass.depth.mem));
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VK_CHECK_RESULT(vkBindImageMemory(device, offscreenPass.depth.image, offscreenPass.depth.mem, 0));
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vks::tools::setImageLayout(
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layoutCmd,
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offscreenPass.depth.image,
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VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT,
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VK_IMAGE_LAYOUT_UNDEFINED,
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VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
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vulkanDevice->flushCommandBuffer(layoutCmd, queue, true);
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depthStencilView.image = offscreenPass.depth.image;
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VK_CHECK_RESULT(vkCreateImageView(device, &depthStencilView, nullptr, &offscreenPass.depth.view));
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VkImageView attachments[2];
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attachments[1] = offscreenPass.depth.view;
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VkFramebufferCreateInfo fbufCreateInfo = vks::initializers::framebufferCreateInfo();
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fbufCreateInfo.renderPass = offscreenPass.renderPass;
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fbufCreateInfo.attachmentCount = 2;
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fbufCreateInfo.pAttachments = attachments;
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fbufCreateInfo.width = offscreenPass.width;
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fbufCreateInfo.height = offscreenPass.height;
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fbufCreateInfo.layers = 1;
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for (uint32_t i = 0; i < 6; i++)
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{
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attachments[0] = shadowCubeMapFaceImageViews[i];
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VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &offscreenPass.frameBuffers[i]));
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}
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}
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// Updates a single cube map face
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// Renders the scene with face's view directly to the cubemap layer `faceIndex`
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// Uses push constants for quick update of view matrix for the current cube map face
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void updateCubeFace(uint32_t faceIndex, VkCommandBuffer commandBuffer)
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{
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VkClearValue clearValues[2];
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clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 1.0f } };
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clearValues[1].depthStencil = { 1.0f, 0 };
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VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
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// Reuse render pass from example pass
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renderPassBeginInfo.renderPass = offscreenPass.renderPass;
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renderPassBeginInfo.framebuffer = offscreenPass.frameBuffers[faceIndex];
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renderPassBeginInfo.renderArea.extent.width = offscreenPass.width;
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renderPassBeginInfo.renderArea.extent.height = offscreenPass.height;
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renderPassBeginInfo.clearValueCount = 2;
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renderPassBeginInfo.pClearValues = clearValues;
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// Update view matrix via push constant
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glm::mat4 viewMatrix = glm::mat4(1.0f);
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switch (faceIndex)
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{
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case 0: // POSITIVE_X
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viewMatrix = glm::rotate(viewMatrix, glm::radians(90.0f), glm::vec3(0.0f, 1.0f, 0.0f));
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viewMatrix = glm::rotate(viewMatrix, glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f));
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break;
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case 1: // NEGATIVE_X
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viewMatrix = glm::rotate(viewMatrix, glm::radians(-90.0f), glm::vec3(0.0f, 1.0f, 0.0f));
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viewMatrix = glm::rotate(viewMatrix, glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f));
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break;
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case 2: // POSITIVE_Y
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viewMatrix = glm::rotate(viewMatrix, glm::radians(-90.0f), glm::vec3(1.0f, 0.0f, 0.0f));
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break;
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case 3: // NEGATIVE_Y
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viewMatrix = glm::rotate(viewMatrix, glm::radians(90.0f), glm::vec3(1.0f, 0.0f, 0.0f));
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break;
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case 4: // POSITIVE_Z
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viewMatrix = glm::rotate(viewMatrix, glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f));
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break;
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case 5: // NEGATIVE_Z
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viewMatrix = glm::rotate(viewMatrix, glm::radians(180.0f), glm::vec3(0.0f, 0.0f, 1.0f));
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break;
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}
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// Render scene from cube face's point of view
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vkCmdBeginRenderPass(commandBuffer, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
// Update shader push constant block
|
|
// Contains current face view matrix
|
|
vkCmdPushConstants(
|
|
commandBuffer,
|
|
pipelineLayouts.offscreen,
|
|
VK_SHADER_STAGE_VERTEX_BIT,
|
|
0,
|
|
sizeof(glm::mat4),
|
|
&viewMatrix);
|
|
|
|
vkCmdBindPipeline(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.offscreen);
|
|
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.offscreen, 0, 1, &descriptorSets.offscreen, 0, NULL);
|
|
models.scene.draw(commandBuffer);
|
|
|
|
vkCmdEndRenderPass(commandBuffer);
|
|
}
|
|
|
|
void buildCommandBuffers()
|
|
{
|
|
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
|
|
|
|
for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
|
|
{
|
|
VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
|
|
|
|
/*
|
|
Generate shadow cube maps using one render pass per face
|
|
*/
|
|
{
|
|
VkViewport viewport = vks::initializers::viewport((float)offscreenPass.width, (float)offscreenPass.height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
|
|
VkRect2D scissor = vks::initializers::rect2D(offscreenPass.width, offscreenPass.height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
for (uint32_t face = 0; face < 6; face++) {
|
|
updateCubeFace(face, drawCmdBuffers[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
Note: Explicit synchronization is not required between the render pass, as this is done implicit via sub pass dependencies
|
|
*/
|
|
|
|
/*
|
|
Scene rendering with applied shadow map
|
|
*/
|
|
{
|
|
VkClearValue clearValues[2];
|
|
clearValues[0].color = defaultClearColor;
|
|
clearValues[1].depthStencil = { 1.0f, 0 };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
renderPassBeginInfo.renderPass = renderPass;
|
|
renderPassBeginInfo.framebuffer = frameBuffers[i];
|
|
renderPassBeginInfo.renderArea.extent.width = width;
|
|
renderPassBeginInfo.renderArea.extent.height = height;
|
|
renderPassBeginInfo.clearValueCount = 2;
|
|
renderPassBeginInfo.pClearValues = clearValues;
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
|
|
VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.scene, 0, 1, &descriptorSets.scene, 0, NULL);
|
|
|
|
if (displayCubeMap)
|
|
{
|
|
// Display all six sides of the shadow cube map
|
|
// Note: Visualization of the different faces is done in the fragment shader, see cubemapdisplay.frag
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.cubemapDisplay);
|
|
models.debugcube.draw(drawCmdBuffers[i]);
|
|
}
|
|
else
|
|
{
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.scene);
|
|
models.scene.draw(drawCmdBuffers[i]);
|
|
}
|
|
|
|
drawUI(drawCmdBuffers[i]);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
}
|
|
|
|
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
|
|
}
|
|
}
|
|
|
|
void loadAssets()
|
|
{
|
|
const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
|
|
models.debugcube.loadFromFile(getAssetPath() + "models/cube.gltf", vulkanDevice, queue, glTFLoadingFlags);
|
|
models.scene.loadFromFile(getAssetPath() + "models/shadowscene_fire.gltf", vulkanDevice, queue, glTFLoadingFlags);
|
|
}
|
|
|
|
void setupDescriptors()
|
|
{
|
|
// Pool
|
|
std::vector<VkDescriptorPoolSize> poolSizes = {
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 3),
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2)
|
|
};
|
|
VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 3);
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
|
|
|
|
// Layout
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
|
|
// Binding 0 : Vertex shader uniform buffer
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
|
|
// Binding 1 : Fragment shader image sampler (cube map)
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 1)
|
|
};
|
|
VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
|
|
|
|
// Sets
|
|
VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
|
|
|
|
// 3D scene
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.scene));
|
|
// Image descriptor for the cube map
|
|
VkDescriptorImageInfo texDescriptor =
|
|
vks::initializers::descriptorImageInfo(
|
|
shadowCubeMap.sampler,
|
|
shadowCubeMap.view,
|
|
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
|
|
|
|
std::vector<VkWriteDescriptorSet> sceneDescriptorSets = {
|
|
// Binding 0 : Vertex shader uniform buffer
|
|
vks::initializers::writeDescriptorSet(descriptorSets.scene, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.scene.descriptor),
|
|
// Binding 1 : Fragment shader shadow sampler
|
|
vks::initializers::writeDescriptorSet(descriptorSets.scene, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, &texDescriptor)
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(sceneDescriptorSets.size()), sceneDescriptorSets.data(), 0, nullptr);
|
|
|
|
// Offscreen
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.offscreen));
|
|
std::vector<VkWriteDescriptorSet> offScreenWriteDescriptorSets = {
|
|
// Binding 0 : Vertex shader uniform buffer
|
|
vks::initializers::writeDescriptorSet(descriptorSets.offscreen, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.offscreen.descriptor),
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(offScreenWriteDescriptorSets.size()), offScreenWriteDescriptorSets.data(), 0, nullptr);
|
|
}
|
|
|
|
void preparePipelines()
|
|
{
|
|
// Layouts
|
|
// 3D scene pipeline layout
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayouts.scene));
|
|
|
|
// Offscreen pipeline layout
|
|
// Push constants for cube map face view matrices
|
|
VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(glm::mat4), 0);
|
|
// Push constant ranges are part of the pipeline layout
|
|
pipelineLayoutCreateInfo.pushConstantRangeCount = 1;
|
|
pipelineLayoutCreateInfo.pPushConstantRanges = &pushConstantRange;
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayouts.offscreen));
|
|
|
|
|
|
// Pipelines
|
|
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
|
|
VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
|
|
VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
|
|
std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
|
|
VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
|
|
|
|
// 3D scene pipeline
|
|
// Load shaders
|
|
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
|
|
|
shaderStages[0] = loadShader(getShadersPath() + "shadowmappingomni/scene.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "shadowmappingomni/scene.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayouts.scene, renderPass, 0);
|
|
pipelineCI.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCI.pRasterizationState = &rasterizationState;
|
|
pipelineCI.pColorBlendState = &colorBlendState;
|
|
pipelineCI.pMultisampleState = &multisampleState;
|
|
pipelineCI.pViewportState = &viewportState;
|
|
pipelineCI.pDepthStencilState = &depthStencilState;
|
|
pipelineCI.pDynamicState = &dynamicState;
|
|
pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
|
|
pipelineCI.pStages = shaderStages.data();
|
|
pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Color, vkglTF::VertexComponent::Normal});
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.scene));
|
|
|
|
// Offscreen pipeline
|
|
shaderStages[0] = loadShader(getShadersPath() + "shadowmappingomni/offscreen.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "shadowmappingomni/offscreen.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
pipelineCI.layout = pipelineLayouts.offscreen;
|
|
pipelineCI.renderPass = offscreenPass.renderPass;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.offscreen));
|
|
|
|
// Cube map display pipeline
|
|
shaderStages[0] = loadShader(getShadersPath() + "shadowmappingomni/cubemapdisplay.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "shadowmappingomni/cubemapdisplay.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VkPipelineVertexInputStateCreateInfo emptyInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
|
|
pipelineCI.pVertexInputState = &emptyInputState;
|
|
pipelineCI.layout = pipelineLayouts.scene;
|
|
pipelineCI.renderPass = renderPass;
|
|
rasterizationState.cullMode = VK_CULL_MODE_NONE;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.cubemapDisplay));
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Offscreen vertex shader uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffers.offscreen, sizeof(UniformData)));
|
|
// Scene vertex shader uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffers.scene, sizeof(UniformData)));
|
|
// Map persistent
|
|
VK_CHECK_RESULT(uniformBuffers.offscreen.map());
|
|
VK_CHECK_RESULT(uniformBuffers.scene.map());
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
uniformDataScene.projection = camera.matrices.perspective;
|
|
uniformDataScene.view = camera.matrices.view;
|
|
uniformDataScene.model = glm::mat4(1.0f);
|
|
uniformDataScene.lightPos = lightPos;
|
|
memcpy(uniformBuffers.scene.mapped, &uniformDataScene, sizeof(UniformData));
|
|
}
|
|
|
|
void updateUniformBufferOffscreen()
|
|
{
|
|
lightPos.x = sin(glm::radians(timer * 360.0f)) * 0.15f;
|
|
lightPos.z = cos(glm::radians(timer * 360.0f)) * 0.15f;
|
|
uniformDataOffscreen.projection = glm::perspective((float)(M_PI / 2.0), 1.0f, zNear, zFar);
|
|
uniformDataOffscreen.view = glm::mat4(1.0f);
|
|
uniformDataOffscreen.model = glm::translate(glm::mat4(1.0f), glm::vec3(-lightPos.x, -lightPos.y, -lightPos.z));
|
|
uniformDataOffscreen.lightPos = lightPos;
|
|
memcpy(uniformBuffers.offscreen.mapped, &uniformDataOffscreen, sizeof(UniformData));
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
loadAssets();
|
|
prepareUniformBuffers();
|
|
prepareCubeMap();
|
|
setupDescriptors();
|
|
prepareOffscreenRenderpass();
|
|
preparePipelines();
|
|
prepareOffscreenFramebuffer();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
updateUniformBuffers();
|
|
updateUniformBufferOffscreen();
|
|
draw();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Settings")) {
|
|
if (overlay->checkBox("Display shadow cube render target", &displayCubeMap)) {
|
|
buildCommandBuffers();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|