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Add slang shader for shadow mapping and shadow mapping cascades sample

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This commit is contained in:
Sascha Willems 2025-04-28 21:03:37 +02:00
parent 126231756a
commit 153aa3b932
7 changed files with 436 additions and 8 deletions
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14
examples/shadowmappingcascade/shadowmappingcascade.cpp
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@ -1,10 +1,8 @@
/*
Vulkan Example - Cascaded shadow mapping for directional light sources
Copyright by Sascha Willems - www.saschawillems.de
Copyright (c) 2016-2025 by Sascha Willems - www.saschawillems.de
This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/
/*
This example implements projective cascaded shadow mapping. This technique splits up the camera frustum into
multiple frustums with each getting its own full-res shadow map, implemented as a layered depth-only image.
The shader then selects the proper shadow map layer depending on what split of the frustum the depth value
@ -175,7 +173,7 @@ public:
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
// Floor
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
models.terrain.draw(commandBuffer, vkglTF::RenderFlags::BindImages, pipelineLayout);
// Trees
@ -189,7 +187,7 @@ public:
for (auto& position : positions) {
pushConstBlock.position = glm::vec4(position, 0.0f);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
// This will also bind the texture images to set 1
models.tree.draw(commandBuffer, vkglTF::RenderFlags::BindImages, pipelineLayout);
}
@ -413,7 +411,7 @@ public:
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.debugShadowMap);
PushConstBlock pushConstBlock = {};
pushConstBlock.cascadeIndex = displayDepthMapCascadeIndex;
vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
vkCmdDraw(drawCmdBuffers[i], 3, 1, 0, 0);
}
@ -490,7 +488,7 @@ public:
// Shared pipeline layout (scene and depth map debug display)
{
VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(PushConstBlock), 0);
VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(PushConstBlock), 0);
std::array<VkDescriptorSetLayout, 2> setLayouts = { descriptorSetLayout, vkglTF::descriptorSetLayoutImage };
VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(setLayouts.data(), static_cast<uint32_t>(setLayouts.size()));
pipelineLayoutCreateInfo.pushConstantRangeCount = 1;
@ -500,7 +498,7 @@ public:
// Depth pass pipeline layout
{
VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(PushConstBlock), 0);
VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(PushConstBlock), 0);
std::array<VkDescriptorSetLayout, 2> setLayouts = { descriptorSetLayout, vkglTF::descriptorSetLayoutImage };
VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(setLayouts.data(), static_cast<uint32_t>(setLayouts.size()));
pipelineLayoutCreateInfo.pushConstantRangeCount = 1;