CreateBottomLevelAS()

void Spices::RayTracingRenderer::CreateBottomLevelAS ( FrameInfo & frameInfo, std::shared_ptr< std::vector< uint32_t > > view, std::shared_ptr< VulkanRayTracing > rayTracingInstance )

private

Create BottomLevelAS with all MeshComponents.

Parameters

[in]	frameInfo	FrameInfo.
[in]	view	Component View.
[in]	rayTracingInstance	VulkanRayTracingInstance.

BLAS - Storing each primitive in a geometry.

Iter all MeshComponents.

Skip if no blas build requirment.

Build BLAS.

BLAS - Storing each primitive in a geometry.

Iter all MeshComponents.

Skip if no blas build requirment.

Build BLAS.

Definition at line 204 of file RayTracingRenderer.cpp.

    {
        SPICES_PROFILE_ZONE;
 
        std::vector<VulkanRayTracing::BlasInput> allBlas;
        
        frameInfo.m_World->ViewComponent<MeshComponent>(*view, [&](auto e, auto& meshComp){
 
            meshComp.GetMesh()->GetPacks().for_each([&](const uint32_t& k, const std::shared_ptr<MeshPack>& v) {
 
                if (v->HasBlasAccel()) return false;
 
                auto blas = v->MeshPackToVkGeometryKHR();
                allBlas.emplace_back(blas);
 
                return false;
            });
 
            return false;
        });
 
        if(allBlas.empty()) return;
        
        rayTracingInstance->BuildBLAS(
            allBlas, 
            VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_TRACE_BIT_KHR | 
            VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_UPDATE_BIT_KHR 
            //VK_BUILD_ACCELERATION_STRUCTURE_ALLOW_COMPACTION_BIT_KHR     // Compress cost too mush time in with large count of meshes.
        );
    }