Function CullMeshes

BindlessDeferred/MeshRenderer.cpp:53–67

Frustum culls meshes, and produces a buffer of visible mesh indices

// Frustum culls meshes, and produces a buffer of visible mesh indices
static uint64 CullMeshes(const Camera& camera, const Array<DirectX::BoundingBox>& boundingBoxes, Array<uint32>& drawIndices)
{
    DirectX::BoundingFrustum frustum(camera.ProjectionMatrix().ToSIMD());
    frustum.Transform(frustum, 1.0f, camera.Orientation().ToSIMD(), camera.Position().ToSIMD());

    uint64 numVisible = 0;
    const uint64 numMeshes = boundingBoxes.Size();
    for(uint64 i = 0; i < numMeshes; ++i)
    {
        if(frustum.Intersects(boundingBoxes[i]))
            drawIndices[numVisible++] = uint32(i);
    }

    return numVisible;
}

// Frustum culls meshes, and produces a buffer of visible mesh indices. Also sorts the indices by depth.
static uint64 CullMeshesAndSort(const Camera& camera, const Array<DirectX::BoundingBox>& boundingBoxes,