From 860080ada3936f12feb01043032278db0fef3e57 Mon Sep 17 00:00:00 2001
From: Jarrod Doyle <thejarroddoyle@gmail.com>
Date: Tue, 24 Sep 2024 16:16:50 +0100
Subject: [PATCH] Add HDR lightmap support

---
 KeepersCompound.Lightmapper/Program.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/KeepersCompound.Lightmapper/Program.cs b/KeepersCompound.Lightmapper/Program.cs
index b8c8164..14978e8 100644
--- a/KeepersCompound.Lightmapper/Program.cs
+++ b/KeepersCompound.Lightmapper/Program.cs
@@ -213,6 +213,8 @@ class Program
 
     private static void CastScene(Raytracer scene, WorldRep wr, Light[] lights, Vector3 ambientLight)
     {
+        var hdr = wr.DataHeader.LightmapFormat == 2;
+
         var cells = wr.Cells;
         for (var cellIdx = 0; cellIdx < cells.Length; cellIdx++)
         {
@@ -318,6 +320,10 @@ class Program
                                 var len = dir.Length();
                                 var slen = len / 4.0f;
                                 var strength = (angle + 1.0f) / slen;
+                                if (hdr)
+                                {
+                                    strength /= 2;
+                                }
                                 strength = Math.Min(1.0f, strength);
 
                                 var c = light.color * strength;