61 lines
1.3 KiB
HLSL
61 lines
1.3 KiB
HLSL
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float4x4 matWorldViewProj;
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float timestep;
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struct VS_Output
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{
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float4 Pos : POSITION;
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float4 Coord : TEXCOORD0;
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};
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VS_Output
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MyVertexShader(float4 inputPos : POSITION)
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{
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VS_Output Output;
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float4 objectCoord = inputPos;
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float dist = pow(objectCoord.x, 2) + pow(objectCoord.y, 2);
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objectCoord.z = sin(dist * 8.0 + timestep) / (1 + dist * 10.0);
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Output.Pos = mul(objectCoord, matWorldViewProj);
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Output.Coord = objectCoord;
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return Output;
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}
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struct PS_Input
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{
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float4 Coord : TEXCOORD0;
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};
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float4
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MyPixelShader(PS_Input Input) : COLOR
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{
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/*
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* Simple 2D procedural checkerboard.
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*/
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const float4 color1 = { 0.25, 0.25, 0.25, 1.0 };
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const float4 color2 = { 1.0, 1.0, 1.0, 1.0 };
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const float checkerSize = 0.2;
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float2 s = fmod(Input.Coord.xy / checkerSize, 1);
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float check = ( (float)(s.x > 0.5 || (s.x < 0 && s.x > -0.5)) +
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(float)(s.y > 0.5 || (s.y < 0 && s.y > -0.5)) );
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float4 color = lerp(color1, color2, fmod(check, 2));
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/*
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* Do a little fake shading
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*/
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const float4 shadeTop = { 1.0, 1.0, 0.5, 1.0 };
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const float4 shadeBottom = { 0.5, 0.5, 1.0, 1.0 };
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float z = Input.Coord.z * 2;
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color = lerp(color, shadeBottom, clamp(z, 0, 0.25));
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color = lerp(color, shadeTop, clamp(-z, 0, 0.25));
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return color;
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}
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