From 6a7ee922b5e013015a038d9512f2816e2ad696c4 Mon Sep 17 00:00:00 2001
From: Jarrod Doyle <thejarroddoyle@gmail.com>
Date: Wed, 15 Jan 2025 22:16:52 +0000
Subject: [PATCH] Fall back to a cast if clipping point to poly gives us
 something sucky

---
 KeepersCompound.Lightmapper/LightMapper.cs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/KeepersCompound.Lightmapper/LightMapper.cs b/KeepersCompound.Lightmapper/LightMapper.cs
index 94e42b9..bfad390 100644
--- a/KeepersCompound.Lightmapper/LightMapper.cs
+++ b/KeepersCompound.Lightmapper/LightMapper.cs
@@ -831,6 +831,25 @@ public class LightMapper
                 var p2d = planeMapper.MapTo2d(pos);
                 p2d = MathUtils.ClipPointToPoly2d(p2d, v2ds);
                 pos = planeMapper.MapTo3d(p2d);
+                
+                // If the clipping fails, just say screw it and cast :(
+                // TODO: This fails if there's an immovable object blocking the poly center. Need give object polys a different type and do a filtered cast/loop cast ignoring immobile hits
+                occluded = TraceOcclusion(polyCenter + planeMapper.Normal * 0.25f, pos);
+                if (occluded)
+                {
+                    var origin = polyCenter + planeMapper.Normal * 0.25f;
+                    var direction = pos - origin;
+                    var hitResult = _scene.Trace(new Ray
+                    {
+                        Origin = polyCenter + planeMapper.Normal * 0.25f,
+                        Direction = Vector3.Normalize(direction),
+                    });
+                    
+                    if (hitResult)
+                    {
+                        pos = hitResult.Position;
+                    }
+                }
             }
             
             tracePoints[i] = pos;