66 lines
1.3 KiB
Plaintext
66 lines
1.3 KiB
Plaintext
#include "Common.ush"
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void MainVertexShader(
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float4 InPosition : ATTRIBUTE0,
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float2 InUV : ATTRIBUTE1,
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out float2 OutUV : TEXCOORD0,
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out float4 OutPosition : SV_POSITION
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)
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{
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OutPosition = InPosition;
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OutUV = InUV;
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}
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Texture2D<uint> TextureParameter;
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#define Zoom 2
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#define Pan float2(0.5, 0)
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#define Aspect 1
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#define Iterations int(128*PSVariables.IterationsMultiplier)
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#define JuliaSeed float2(0.39, 0.2)
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#define ColorScale float3(4, 5, 6)
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float ComputeValue(float2 v, float2 offset)
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{
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float vxsquare = 0;
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float vysquare = 0;
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int iteration = 0;
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int lastIteration = Iterations;
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do
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{
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vxsquare = v.x * v.x;
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vysquare = v.y * v.y;
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v = float2(vxsquare - vysquare, v.x * v.y * 2) + offset;
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iteration++;
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if ((lastIteration == Iterations) && (vxsquare + vysquare) > 4.0)
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{
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lastIteration = iteration + 1;
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}
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} while (iteration < lastIteration);
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return (float(iteration) - (log(log(sqrt(vxsquare + vysquare))) / log(2.0))) / float(Iterations);
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}
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float4 Mandelbrot_Func(float2 texCoord : TEXCOORD0) : COLOR0
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{
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float2 v = (texCoord - 0.5) * Zoom * float2(1, Aspect) - Pan;
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float val = ComputeValue(v, v);
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return float4(sin(val * ColorScale.x), sin(val * ColorScale.y), sin(val * ColorScale.z), 1);
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}
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void MainPixelShader(
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in float2 uv : TEXCOORD0,
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out float4 OutColor : SV_Target0
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)
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{
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OutColor = Mandelbrot_Func(uv);
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}
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