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Code cleanup, comments

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saschawillems 2017-12-23 14:14:38 +01:00
parent 1b1bb4cbd2
commit 8b4ab74220
1 changed files with 56 additions and 46 deletions
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102
examples/shadowmappingcascade/shadowmappingcascade.cpp
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@ -215,6 +215,52 @@ public:
enabledFeatures.depthClamp = deviceFeatures.depthClamp;
}
/*
Render the example scene with given command buffer, pipeline layout and dscriptor set
Used by the scene rendering and depth pass generation command buffer
*/
void renderScene(VkCommandBuffer commandBuffer, VkPipelineLayout pipelineLayout, VkDescriptorSet descriptorSet, uint32_t cascadeIndex = 0) {
const VkDeviceSize offsets[1] = { 0 };
PushConstBlock pushConstBlock = { glm::vec4(0.0f), cascadeIndex };
std::array<VkDescriptorSet, 2> sets;
sets[0] = descriptorSet;
// Floor
sets[1] = materials[0].descriptorSet;
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 2, sets.data(), 0, NULL);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &models[0].vertices.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, models[0].indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(commandBuffer, models[0].indexCount, 1, 0, 0, 0);
// Trees
const std::vector<glm::vec3> positions = {
glm::vec3(0.0f, 0.0f, 0.0f),
glm::vec3(1.25f, 0.25f, 1.25f),
glm::vec3(-1.25f, -0.2f, 1.25f),
glm::vec3(1.25f, 0.1f, -1.25f),
glm::vec3(-1.25f, -0.25f, -1.25f),
};
for (auto position : positions) {
pushConstBlock.position = glm::vec4(position, 0.0f);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
sets[1] = materials[1].descriptorSet;
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 2, sets.data(), 0, NULL);
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &models[1].vertices.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, models[1].indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(commandBuffer, models[1].indexCount, 1, 0, 0, 0);
sets[1] = materials[2].descriptorSet;
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 2, sets.data(), 0, NULL);
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &models[2].vertices.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, models[2].indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(commandBuffer, models[2].indexCount, 1, 0, 0, 0);
}
}
/*
Setup resources used by the depth pass
The depth image is layered with each layer storing one shadow map cascade
@ -320,6 +366,7 @@ public:
// One image and framebuffer per cascade
for (uint32_t i = 0; i < SHADOW_MAP_CASCADE_COUNT; i++) {
// Image view for this cascade's layer (inside the depth map)
// This view is used to render to that specific depth image layer
VkImageViewCreateInfo viewInfo = vks::initializers::imageViewCreateInfo();
viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D_ARRAY;
viewInfo.format = depthFormat;
@ -358,49 +405,12 @@ public:
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &depth.sampler));
}
void renderScene(VkCommandBuffer commandBuffer, VkPipelineLayout pipelineLayout, VkDescriptorSet descriptorSet, uint32_t cascadeIndex = 0) {
const VkDeviceSize offsets[1] = { 0 };
PushConstBlock pushConstBlock = { glm::vec4(0.0f), cascadeIndex };
std::array<VkDescriptorSet,2> sets;
sets[0] = descriptorSet;
// Floor
sets[1] = materials[0].descriptorSet;
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 2, sets.data(), 0, NULL);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &models[0].vertices.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, models[0].indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(commandBuffer, models[0].indexCount, 1, 0, 0, 0);
// Trees
const std::vector<glm::vec3> positions = {
glm::vec3(0.0f, 0.0f, 0.0f),
glm::vec3(1.25f, 0.25f, 1.25f),
glm::vec3(-1.25f, -0.2f, 1.25f),
glm::vec3(1.25f, 0.1f, -1.25f),
glm::vec3(-1.25f, -0.25f, -1.25f),
};
for (auto position : positions) {
pushConstBlock.position = glm::vec4(position, 0.0f);
vkCmdPushConstants(commandBuffer, pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(PushConstBlock), &pushConstBlock);
sets[1] = materials[1].descriptorSet;
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 2, sets.data(), 0, NULL);
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &models[1].vertices.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, models[1].indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(commandBuffer, models[1].indexCount, 1, 0, 0, 0);
sets[1] = materials[2].descriptorSet;
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 2, sets.data(), 0, NULL);
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &models[2].vertices.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, models[2].indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(commandBuffer, models[2].indexCount, 1, 0, 0, 0);
}
}
void buildOffscreenCommandBuffer()
/*
Build the command buffer for rendering the depth map cascades
Uses multiple passes with each pass rendering the scene to the cascade's depth image layer
Could be optimized using a geometry shader (and layered frame buffer) on devices that support geometry shaders
*/
void buildDepthPassCommandBuffer()
{
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
@ -424,8 +434,8 @@ public:
VkRect2D scissor = vks::initializers::rect2D(SHADOWMAP_DIM, SHADOWMAP_DIM, 0, 0);
vkCmdSetScissor(depthPass.commandBuffer, 0, 1, &scissor);
// Multi-pass depht map cascade generation
// Could be simplified to one pass using geometry shaders and layered frame buffers
// One pass per cascade
// The layer that this pass renders too is defined by the cascade's image view (selected via the cascade's decsriptor set)
for (uint32_t i = 0; i < SHADOW_MAP_CASCADE_COUNT; i++) {
renderPassBeginInfo.framebuffer = cascades[i].frameBuffer;
vkCmdBeginRenderPass(depthPass.commandBuffer, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
@ -904,7 +914,7 @@ public:
setupLayoutsAndDescriptors();
preparePipelines();
buildCommandBuffers();
buildOffscreenCommandBuffer();
buildDepthPassCommandBuffer();
prepared = true;
}