From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Fri, 27 Nov 2009 15:31:58 +0000 (+0000)
Subject: more work on mod_generatelightmaps:
X-Git-Tag: xonotic-v0.1.0preview~1122
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=7b6f7fdf7194eb66fe973b473ab385e035984070;p=xonotic%2Fdarkplaces.git

more work on mod_generatelightmaps:
don't accept lights behind a surface, they mess up shading


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9524 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/model_shared.c b/model_shared.c
index 1635e087..faec4c5a 100644
--- a/model_shared.c
+++ b/model_shared.c
@@ -3219,6 +3219,9 @@ static void Mod_GenerateLightmaps_SamplePoint(const float *pos, const float *nor
 	{
 		//R_SampleRTLights(pos, sample, numoffsets, offsets);
 		VectorSubtract(lightinfo->origin, pos, relativepoint);
+		// don't accept light from behind a surface, it causes bad shading
+		if (normal && DotProduct(relativepoint, normal) <= 0)
+			continue;
 		dist2 = VectorLength2(relativepoint);
 		if (dist2 >= lightinfo->radius2)
 			continue;