75 lines
1.8 KiB
GLSL
75 lines
1.8 KiB
GLSL
/////////////
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// GLOBALS //
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/////////////
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cbuffer TessellationBuffer : register(b0)
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{
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float tessellationAmount;
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float3 padding;
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};
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//////////////
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// TYPEDEFS //
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//////////////
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struct HullInputType
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{
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float3 position : POSITION;
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float4 color : COLOR;
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};
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struct ConstantOutputType
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{
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float edges[3] : SV_TessFactor;
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float inside : SV_InsideTessFactor;
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};
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struct HullOutputType
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{
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float3 position : POSITION;
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float4 color : COLOR;
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};
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////////////////////////////////////////////////////////////////////////////////
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// Patch Constant Function
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////////////////////////////////////////////////////////////////////////////////
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ConstantOutputType ColorPatchConstantFunction(InputPatch<HullInputType, 3> inputPatch, uint patchId : SV_PrimitiveID)
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{
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ConstantOutputType output;
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// Set the tessellation factors for the three edges of the triangle.
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output.edges[0] = tessellationAmount;
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output.edges[1] = tessellationAmount;
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output.edges[2] = tessellationAmount;
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// Set the tessellation factor for tessallating inside the triangle.
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output.inside = tessellationAmount;
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return output;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Hull Shader
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////////////////////////////////////////////////////////////////////////////////
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[domain("tri")]
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[partitioning("integer")]
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[outputtopology("triangle_cw")]
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[outputcontrolpoints(3)]
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[patchconstantfunc("ColorPatchConstantFunction")]
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HullOutputType main(InputPatch<HullInputType, 3> patch, uint pointId : SV_OutputControlPointID, uint patchId : SV_PrimitiveID)
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{
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HullOutputType output;
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// Set the position for this control point as the output position.
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output.position = patch[pointId].position;
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// Set the input color as the output color.
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output.color = patch[pointId].color;
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return output;
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}
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