Geek Answers Handbook

Update VkDescriptorSet inside rendering

Suppose I have several cells that I want to display using different materials. I know that I can use for this example push constants, but this question is more for understanding how vkDescriptorset works.

struct Material {
    vec4 color;
    vkDescriptorset descriptorSet;
    VkDescriptorBufferInfo descriptorBufferInfo;
};

I only call vkUpdateDescriptorSetsfor _descriptorBufferInfoafter the data buffer has been created. Everything is working fine.

I checked another solution. Instead of having one vkDescriptorsetper material, I only have one for all of them. And inside rendepassI call vkUpdateDescriptorSetsfor each of the materials VkDescriptorBufferInfo.

vkDescriptorset globalDescriptorSet;
struct Material {
  vec4 color;
  VkDescriptorBufferInfo descriptorBufferInfo;
};

beginCommandBuffer
beginRenderPass
for (auto &mesh : meshes) {
    ...
    writeDescriptorSets.dstSet = globalDescriptorSet;
    writeDescriptorSets.pBufferInfo = &mesh.material.descriptorBufferInfo;
    ....
    vkUpdateDescriptorSets(device, 1, &writeDescriptorSets, 0, nullptr);
    renderMesh(mesh);
}
endRenderPass
endCommandBuffer

, . , beginCommandBuffer vkCmdBindDescriptorSets, vkCmdBindPipeline .. .

? vkDescriptorset VkDescriptorBufferInfo renderPass?

+4
1

:

, vkCmdBindDescriptorSets, . , ( ) , , .

( )

, renderMesh , . , ( CB ).

/ . / , . , .

+2

More articles:


All Articles