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