mixin VolumeRenderBase
{
	depth
	{
		read = false;
		write = false;
	};

	code
	{
		struct VStoGS
		{
			float4 position : SV_POSITION;
			float2 uv0 : TEXCOORD0;
			uint layerIdx : TEXCOORD1;
		};
		
		struct GStoFS
		{
			float4 position : SV_POSITION;
			float2 uv0 : TEXCOORD0;
			uint layerIdx : SV_RenderTargetArrayIndex;
		};			

		struct VertexInput
		{
			float2 screenPos : POSITION;
			float2 uv0 : TEXCOORD0;
			uint layerIdx : SV_InstanceID;
		};
		
		VStoGS vsmain(VertexInput input)
		{
			VStoGS output;
		
			output.position = float4(input.screenPos, 0, 1);
			output.uv0 = input.uv0;
			output.layerIdx = input.layerIdx;
			
			return output;
		}
	
		[maxvertexcount(3)]
		void gsmain(triangle VStoGS input[3], inout TriangleStream<GStoFS> outStream)
		{
			GStoFS vert0;
			vert0.position = input[0].position;
			vert0.uv0 = input[0].uv0;
			vert0.layerIdx = input[0].layerIdx;

			GStoFS vert1;
			vert1.position = input[1].position;
			vert1.uv0 = input[1].uv0;
			vert1.layerIdx = input[1].layerIdx;

			GStoFS vert2;
			vert2.position = input[2].position;
			vert2.uv0 = input[2].uv0;
			vert2.layerIdx = input[2].layerIdx;

			outStream.Append(vert0);
			outStream.Append(vert1);
			outStream.Append(vert2);
		}
	};
};