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Close #1: Finally cracked the colored lighting problem

This commit is contained in:
Jarrod Doyle 2024-12-09 18:25:33 +00:00
parent 00c2d14a06
commit cb599f24df
Signed by: Jayrude
GPG Key ID: 38B57B16E7C0ADF7
1 changed files with 13 additions and 16 deletions
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29
KeepersCompound.Lightmapper/Utils.cs
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@ -6,26 +6,23 @@ public static class Utils
{ {
// Expects Hue and Saturation are 0-1, Brightness 0-255 // Expects Hue and Saturation are 0-1, Brightness 0-255
// https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_RGB // https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_RGB
// This is actually not accurate to *real* hsb to rgb. But I'm replicating the inaccuracies of Dark :(
// See issue#1
public static Vector3 HsbToRgb(float hue, float saturation, float brightness) public static Vector3 HsbToRgb(float hue, float saturation, float brightness)
{ {
hue *= 360; hue *= 3;
var hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6; var color = hue switch
var f = hue / 60 - Math.Floor(hue / 60);
var v = Convert.ToInt32(brightness);
var p = Convert.ToInt32(brightness * (1 - saturation));
var q = Convert.ToInt32(brightness * (1 - f * saturation));
var t = Convert.ToInt32(brightness * (1 - (1 - f) * saturation));
return hi switch
{ {
0 => new Vector3(v, t, p), < 1 => new Vector3(1f - hue, hue, 0),
1 => new Vector3(q, v, p), < 2 => new Vector3(2f - hue, hue - 1f, 0),
2 => new Vector3(p, v, t), _ => new Vector3(3f - hue, hue - 2, 0),
3 => new Vector3(p, q, v),
4 => new Vector3(t, p, v),
_ => new Vector3(v, p, q),
}; };
color *= saturation;
color += Vector3.One * (1.0f - saturation);
color *= brightness;
return color;
} }
} }