public static void DrawShadow(MPointLight lit, CommandBuffer cb, ref CubeCullingBuffer buffer, ref PipelineBaseBuffer baseBuffer, ComputeShader shader, int offset, Material depthMaterial)
{
cb.SetComputeIntParam(shader, ShaderIDs._LightOffset, offset);
ComputeShaderUtility.Dispatch(shader, cb, RunFrustumCull, baseBuffer.clusterCount, 256);
PerspCam cam = new PerspCam();
cam.aspect = 1;
cam.farClipPlane = lit.range;
cam.nearClipPlane = 0.3f;
cam.position = lit.position;
cam.fov = 90f;
Matrix4x4 vpMatrix;
cb.SetGlobalVector(ShaderIDs._LightPos, new Vector4(lit.position.x, lit.position.y, lit.position.z, lit.range));
PipelineFunctions.SetShaderBuffer(ref baseBuffer, cb);
//Forward
cam.forward = Vector3.forward;
cam.up = Vector3.down;
cam.right = Vector3.left;
cam.position = lit.position;
cam.UpdateTRSMatrix();
cam.UpdateProjectionMatrix();
vpMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, true) * cam.worldToCameraMatrix;
cb.SetRenderTarget(lit.shadowmapTexture, 0, CubemapFace.NegativeZ);
cb.ClearRenderTarget(true, true, Color.white);
cb.SetGlobalMatrix(ShaderIDs._VP, vpMatrix);
offset = offset * 20;
cb.DrawProceduralIndirect(Matrix4x4.identity, depthMaterial, 0, MeshTopology.Triangles, buffer.indirectDrawBuffer, offset);
//Back
cam.forward = Vector3.back;
cam.up = Vector3.down;
cam.right = Vector3.right;
cam.UpdateTRSMatrix();
cam.UpdateProjectionMatrix();
vpMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, true) * cam.worldToCameraMatrix;
cb.SetRenderTarget(lit.shadowmapTexture, 0, CubemapFace.PositiveZ);
cb.ClearRenderTarget(true, true, Color.white);
cb.SetGlobalMatrix(ShaderIDs._VP, vpMatrix);
cb.DrawProceduralIndirect(Matrix4x4.identity, depthMaterial, 0, MeshTopology.Triangles, buffer.indirectDrawBuffer, offset);
//Up
cam.forward = Vector3.up;
cam.up = Vector3.back;
cam.right = Vector3.right;
cam.UpdateTRSMatrix();
cam.UpdateProjectionMatrix();
vpMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, true) * cam.worldToCameraMatrix;
cb.SetRenderTarget(lit.shadowmapTexture, 0, CubemapFace.PositiveY);
cb.ClearRenderTarget(true, true, Color.white);
cb.SetGlobalMatrix(ShaderIDs._VP, vpMatrix);
cb.DrawProceduralIndirect(Matrix4x4.identity, depthMaterial, 0, MeshTopology.Triangles, buffer.indirectDrawBuffer, offset);
//Down
cam.forward = Vector3.down;
cam.up = Vector3.forward;
cam.right = Vector3.right;
cam.UpdateTRSMatrix();
cam.UpdateProjectionMatrix();
vpMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, true) * cam.worldToCameraMatrix;
cb.SetRenderTarget(lit.shadowmapTexture, 0, CubemapFace.NegativeY);
cb.ClearRenderTarget(true, true, Color.white);
cb.SetGlobalMatrix(ShaderIDs._VP, vpMatrix);
cb.DrawProceduralIndirect(Matrix4x4.identity, depthMaterial, 0, MeshTopology.Triangles, buffer.indirectDrawBuffer, offset);
//Right
cam.forward = Vector3.right;
cam.up = Vector3.down;
cam.right = Vector3.forward;
cam.UpdateTRSMatrix();
cam.UpdateProjectionMatrix();
vpMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, true) * cam.worldToCameraMatrix;
cb.SetRenderTarget(lit.shadowmapTexture, 0, CubemapFace.PositiveX);
cb.ClearRenderTarget(true, true, Color.white);
cb.SetGlobalMatrix(ShaderIDs._VP, vpMatrix);
cb.DrawProceduralIndirect(Matrix4x4.identity, depthMaterial, 0, MeshTopology.Triangles, buffer.indirectDrawBuffer, offset);
//Left
cam.forward = Vector3.left;
cam.up = Vector3.down;
cam.right = Vector3.back;
cam.UpdateTRSMatrix();
cam.UpdateProjectionMatrix();
vpMatrix = GL.GetGPUProjectionMatrix(cam.projectionMatrix, true) * cam.worldToCameraMatrix;
cb.SetRenderTarget(lit.shadowmapTexture, 0, CubemapFace.NegativeX);
cb.ClearRenderTarget(true, true, Color.white);
cb.SetGlobalMatrix(ShaderIDs._VP, vpMatrix);
cb.DrawProceduralIndirect(Matrix4x4.identity, depthMaterial, 0, MeshTopology.Triangles, buffer.indirectDrawBuffer, offset);
}
