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Function for generating vertex attribute descriptions for a given vertex layout

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saschawillems 2016-07-14 21:29:56 +02:00
parent 876f5714eb
commit 9782fbcb66
1 changed files with 29 additions and 0 deletions
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29
base/vulkanMeshLoader.hpp
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@ -91,6 +91,35 @@ namespace vkMeshLoader
return vSize;
}
// Generate vertex attribute descriptions for a layout at the given binding point
// Note: Always assumes float formats
static void getVertexInputAttributeDescriptions(std::vector<vkMeshLoader::VertexLayout> layout, std::vector<VkVertexInputAttributeDescription> &attributeDescriptions, uint32_t binding)
{
uint32_t offset = 0;
uint32_t location = 0;
for (auto& layoutDetail : layout)
{
VkVertexInputAttributeDescription inputAttribDescription = {};
inputAttribDescription.binding = binding;
inputAttribDescription.location = location;
inputAttribDescription.offset = offset;
switch (layoutDetail)
{
// UV only has two components
case VERTEX_LAYOUT_UV:
offset += 2 * sizeof(float);
inputAttribDescription.format = VK_FORMAT_R32G32_SFLOAT;
break;
default:
offset += 3 * sizeof(float);
inputAttribDescription.format = VK_FORMAT_R32G32B32_SFLOAT;
}
attributeDescriptions.push_back(inputAttribDescription);
location++;
}
}
// Stores some additonal info and functions for
// specifying pipelines, vertex bindings, etc.
class Mesh