68 lines
1.2 KiB
Text
68 lines
1.2 KiB
Text
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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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float3 Normal;
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};
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struct VSOutput
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{
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float4 Pos : POSITION0;
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float3 Normal;
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};
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struct GSOutput
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{
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float4 Pos : SV_POSITION;
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float3 Color;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 model;
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};
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ConstantBuffer<UBO> ubo;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input)
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{
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VSOutput output;
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output.Normal = input.Normal;
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output.Pos = float4(input.Pos.xyz, 1.0);
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return output;
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}
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[shader("geometry")]
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[maxvertexcount(6)]
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void geometryMain(triangle VSOutput input[3], inout LineStream<GSOutput> outStream)
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{
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float normalLength = 0.02;
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for(int i=0; i<3; i++)
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{
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float3 pos = input[i].Pos.xyz;
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float3 normal = input[i].Normal.xyz;
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GSOutput output = (GSOutput)0;
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output.Pos = mul(ubo.projection, mul(ubo.model, float4(pos, 1.0)));
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output.Color = float3(1.0, 0.0, 0.0);
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outStream.Append( output );
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output.Pos = mul(ubo.projection, mul(ubo.model, float4(pos + normal * normalLength, 1.0)));
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output.Color = float3(0.0, 0.0, 1.0);
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outStream.Append( output );
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outStream.RestartStrip();
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}
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}
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[shader("fragment")]
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float4 fragmentMain(GSOutput input)
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{
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return float4(input.Color, 1.0);
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}
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