59 lines
1.3 KiB
Text
59 lines
1.3 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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float4 Pos;
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float3 Normal;
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float3 Color;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 Color;
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float3 EyePos;
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float3 Normal;
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int TexIndex;
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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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float4x4 normal;
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float4x4 view;
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int texIndex;
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};
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ConstantBuffer<UBO> ubo;
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Sampler2DArray matCapSampler;
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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.Color = input.Color;
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float4x4 modelView = mul(ubo.view, ubo.model);
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output.EyePos = normalize(mul(modelView, input.Pos).xyz);
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output.TexIndex = ubo.texIndex;
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output.Normal = normalize(mul((float3x3)ubo.normal, input.Normal));
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float3 r = reflect(output.EyePos, output.Normal);
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float m = 2.0 * sqrt(pow(r.x, 2.0) + pow(r.y, 2.0) + pow(r.z + 1.0, 2.0));
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output.Pos = mul(ubo.projection, mul(modelView, input.Pos));
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input)
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{
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float3 r = reflect( input.EyePos, input.Normal );
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float3 r2 = float3( r.x, r.y, r.z + 1.0 );
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float m = 2.0 * length( r2 );
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float2 vN = r.xy / m + .5;
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return float4(matCapSampler.Sample(float3(vN, input.TexIndex)).rgb * (clamp(input.Color.r * 2, 0.0, 1.0)), 1.0);
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}
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