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PainterlyUNO/Matrix App/PregeneratedMods/SimpleRainbow.cs

40 lines
1.5 KiB
C#

using System;
using static Matrix_App.GifGeneratorUtils;
namespace Matrix_App.PregeneratedMods
{
public class SimpleRainbow : MatrixGifGenerator
{
[UiDescription(title: "Radial", description: "Uses the angle to alter hues")]
public bool radial = false;
[UiDescription(title: "Saturation", description: "Overall saturation")]
public float saturation = 1.0f;
[UiDescription(title: "Brightness", description: "Overall brightness")]
public float value = 1.0f;
[UiDescription(title: "Hue rotation", description: "Offset for hue calculation")]
public float rotation = 0.0f;
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)
{
if (radial)
{
CartesianToPolar(u - 0.5f, v - 0.5f, out float angle, out float _);
RgbFromHsv(AddHueOffset((angle + MathF.PI) / MathF.PI * 180.0f + frame / (float)totalFrames * 360.0f), saturation, value, out r, out g, out b);
} else
{
RgbFromHsv(AddHueOffset(u * 360.0f + frame / (float) (totalFrames + 0.001) * 360.0f), saturation, value, out r, out g, out b);
}
}
private float AddHueOffset(float hue)
{
return MathF.Abs(hue + rotation * 360) % 360.0f;
}
}
}