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ThiefLightmapper
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More accurate handling of lights hitting the luminance limit

This commit is contained in:
Jarrod Doyle 2024-09-24 18:43:33 +01:00
parent ca43e6f8a5
commit 49a1b4bfcc
Signed by: Jayrude
GPG Key ID: 38B57B16E7C0ADF7
1 changed files with 21 additions and 3 deletions
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24
KeepersCompound.Lightmapper/Program.cs
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@ -1,4 +1,5 @@
using System.Numerics;
using System.Diagnostics;
using System.Numerics;
using KeepersCompound.LGS.Database;
using KeepersCompound.LGS.Database.Chunks;
using TinyEmbree;
@ -311,10 +312,13 @@ class Program
});
// cheeky epsilon
// TODO: Some pixels aren't hitting and I'm not sure why
var hit = hitResult && Math.Abs(hitResult.Distance - direction.Length()) < 0.001;
if (hit)
{
// TODO: This isn't perfectly accurate, but it's pretty fucking close tbh
// Calculate light strength at a given point. As far as I can tell
// this is exact to Dark (I'm a genius??). It's just an inverse distance
// falloff with diffuse angle, except we have to scale the length.
var dir = light.position - pos;
var angle = Vector3.Dot(Vector3.Normalize(dir), plane.Normal);
var len = dir.Length();
@ -325,8 +329,22 @@ class Program
strength /= 2;
}
// We need to make sure we don't go over (255, 255, 255).
// If we just do Max(color, (255, 255, 255)) then we change
// the hue/saturation of coloured lights. Got to make sure we
// maintain the colour ratios.
var c = light.color * strength;
c = Vector3.Min(Vector3.One * 255, c);
var ratio = 0.0f;
foreach (var e in new float[] { c.X, c.Y, c.Z })
{
ratio = Math.Max(ratio, e / 255.0f);
}
if (ratio > 1.0f)
{
c /= ratio;
}
lightmap.AddLight(0, x, y, (byte)c.X, (byte)c.Y, (byte)c.Z);
}
}