34 lines
937 B
C#
34 lines
937 B
C#
using System;
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namespace Matrix_App.PregeneratedMods
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{
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public sealed class Spiral : MatrixGifGenerator
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{
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/**
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float spiral(vec2 m) {
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float r = length(m);
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float a = atan(m.y, m.x);
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float v = sin(100.*(sqrt(r)-0.02*a-.3*t));
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return clamp(v,0.,1.);
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}
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*/
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private static float SpiralCurve(float s, float t, float time)
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{
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var r = MathF.Sqrt(s * s + t * t);
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var a = MathF.Atan2(t, s);
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var v = MathF.Sin(50 * (MathF.Sqrt(r) - 0.02f * a - time));
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return v;
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}
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protected override void ColorFragment(in int x, in int y, in float u, in float v, in int frame, out float r, out float g, out float b)
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{
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var sp = SpiralCurve((u - 0.5f) * 0.1f, (v - 0.5f) * 0.1f, frame / (float) totalFrames);
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r = sp;
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g = sp;
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b = sp;
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}
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}
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}
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