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UI button for updating inline uniform blocks at runtime

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This commit is contained in:
saschawillems 2018-10-07 11:12:05 +02:00
parent 367fce5b46
commit 38cd7581b6
1 changed files with 47 additions and 5 deletions
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52
examples/inlineuniformblocks/inlineuniformblocks.cpp
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@ -194,7 +194,6 @@ public:
{
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0),
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_FRAGMENT_BIT, 1),
};
VkDescriptorSetLayoutCreateInfo descriptorLayoutCI = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayoutCI, nullptr, &descriptorSetLayouts.scene));
@ -235,10 +234,9 @@ public:
{
// Pool
std::vector<VkDescriptorPoolSize> poolSizes = {
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, (static_cast<uint32_t>(objects.size()) + 1)),
/* [POI] TODO */
// TODO: split scene and object
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT, (static_cast<uint32_t>(objects.size()) + 1) * sizeof(Object::Material)),
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
/* [POI] Allocate inline uniform blocks */
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT, static_cast<uint32_t>(objects.size()) * sizeof(Object::Material)),
};
VkDescriptorPoolCreateInfo descriptorPoolCI = vks::initializers::descriptorPoolCreateInfo(poolSizes, static_cast<uint32_t>(objects.size()) + 1);
@ -387,9 +385,53 @@ public:
updateUniformBuffers();
}
/*
[POI] Update descriptor sets at runtime
*/
void updateMaterials() {
// Setup random materials for every object in the scene
for (uint32_t i = 0; i < objects.size(); i++) {
objects[i].material.r = glm::clamp(rnd(), 0.005f, 1.0f);
objects[i].material.g = glm::clamp(rnd(), 0.005f, 1.0f);
objects[i].material.b = glm::clamp(rnd(), 0.005f, 1.0f);
objects[i].material.ambient = 0.05f;
objects[i].material.roughness = glm::clamp(rnd(), 0.005f, 1.0f);
objects[i].material.metallic = glm::clamp(rnd(), 0.005f, 1.0f);
}
for (auto &object : objects) {
/*
[POI] New structure that defines size and data of the inline uniform block needs to be chained into the write descriptor set
We will be using this inline uniform block to pass per-object material information to the fragment shader
*/
VkWriteDescriptorSetInlineUniformBlockEXT writeDescriptorSetInlineUniformBlock{};
writeDescriptorSetInlineUniformBlock.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_INLINE_UNIFORM_BLOCK_EXT;
writeDescriptorSetInlineUniformBlock.dataSize = sizeof(Object::Material);
// Uniform data for the inline block
writeDescriptorSetInlineUniformBlock.pData = &object.material;
/*
[POI] Update the object's inline uniform block
*/
VkWriteDescriptorSet writeDescriptorSet{};
writeDescriptorSet.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
writeDescriptorSet.descriptorType = VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT;
writeDescriptorSet.dstSet = object.descriptorSet;
writeDescriptorSet.dstBinding = 0;
writeDescriptorSet.descriptorCount = sizeof(Object::Material);
writeDescriptorSet.pNext = &writeDescriptorSetInlineUniformBlock;
vkUpdateDescriptorSets(device, 1, &writeDescriptorSet, 0, nullptr);
}
}
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
{
if (overlay->button("Randomize")) {
updateMaterials();
}
}
};
VULKAN_EXAMPLE_MAIN()