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PainterlyUNO/Matrix App/PregeneratedMods/Spiral.cs

36 lines
991 B
C#

using System;
using System.Collections.Generic;
using System.Text;
namespace Matrix_App.PregeneratedMods
{
public sealed class Spiral : MatrixGifGenerator
{
/**
float spiral(vec2 m) {
float r = length(m);
float a = atan(m.y, m.x);
float v = sin(100.*(sqrt(r)-0.02*a-.3*t));
return clamp(v,0.,1.);
}
*/
private float SpiralCurve(float s, float t, float time)
{
float r = MathF.Sqrt(s * s + t * t);
float a = MathF.Atan2(t, s);
float v = MathF.Sin(50 * (MathF.Sqrt(r) - 0.02f * a - time));
return v;
}
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)
{
float sp = SpiralCurve((u - 0.5f) * 0.1f, (v - 0.5f) * 0.1f, frame / (float) totalFrames);
r = sp;
g = sp;
b = sp;
}
}
}