54 lines
1.6 KiB
Text
54 lines
1.6 KiB
Text
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// Copyright 2020 Google LLC
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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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float4 lightPos;
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float tessAlpha;
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float tessStrength;
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};
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cbuffer ubo : register(b1) { UBO ubo; }
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Texture2D textureDisplacementMap : register(t2);
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SamplerState samplerDisplacementMap : register(s2);
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struct HSOutput
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{
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[[vk::location(2)]] float4 Pos : POSITION;
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[[vk::location(0)]] float3 Normal : NORMAL0;
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[[vk::location(1)]] float2 UV : TEXCOORD0;
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};
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struct ConstantsHSOutput
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{
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float TessLevelOuter[3] : SV_TessFactor;
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float TessLevelInner : SV_InsideTessFactor;
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};
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struct DSOutput
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{
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float4 Pos : SV_POSITION;
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[[vk::location(0)]] float3 Normal : NORMAL0;
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[[vk::location(1)]] float2 UV : TEXCOORD0;
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[[vk::location(2)]] float3 EyesPos : POSITION0;
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[[vk::location(3)]] float3 LightVec : TEXCOORD1;
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};
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[domain("tri")]
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DSOutput main(ConstantsHSOutput input, float3 TessCoord : SV_DomainLocation, const OutputPatch<HSOutput, 3> patch)
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{
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DSOutput output = (DSOutput)0;
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output.Pos = (TessCoord.x * patch[0].Pos) + (TessCoord.y * patch[1].Pos) + (TessCoord.z * patch[2].Pos);
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output.UV = mul(TessCoord.x, patch[0].UV) + mul(TessCoord.y, patch[1].UV) + mul(TessCoord.z, patch[2].UV);
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output.Normal = TessCoord.x * patch[0].Normal + TessCoord.y * patch[1].Normal + TessCoord.z * patch[2].Normal;
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output.Pos.xyz += normalize(output.Normal) * (max(textureDisplacementMap.SampleLevel(samplerDisplacementMap, output.UV.xy, 0).a, 0.0) * ubo.tessStrength);
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output.EyesPos = output.Pos.xyz;
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output.LightVec = normalize(ubo.lightPos.xyz - output.EyesPos);
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output.Pos = mul(ubo.projection, mul(ubo.model, output.Pos));
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return output;
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}
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