From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Wed, 11 Sep 2002 01:19:39 +0000 (+0000)
Subject: major speed gain in cavetest2 by checking if the portal is facing the wrong way
X-Git-Tag: RELEASE_0_2_0_RC1~252
X-Git-Url: https://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=commitdiff_plain;h=a04fd1b40592a06734300f539087e109892f2854

major speed gain in cavetest2 by checking if the portal is facing the wrong way


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@2354 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/gl_rsurf.c b/gl_rsurf.c
index f5fca788..ef815ae6 100644
--- a/gl_rsurf.c
+++ b/gl_rsurf.c
@@ -1523,7 +1523,7 @@ static void R_DrawPortal_Callback(const void *calldata1, int calldata2)
 	memset(&m, 0, sizeof(m));
 	m.blendfunc1 = GL_SRC_ALPHA;
 	m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
-	m.wantoverbright = false;
+	//m.wantoverbright = false;
 	R_Mesh_Matrix(&ent->matrix);
 	R_Mesh_State(&m);
 	R_Mesh_ResizeCheck(portal->numpoints, portal->numpoints - 2);
@@ -1774,13 +1774,18 @@ static void R_PortalWorldNode(entity_render_t *ent, mleaf_t *viewleaf)
 		// follow portals into other leafs
 		for (p = leaf->portals;p;p = p->next)
 		{
-			leaf = p->past;
-			if (leaf->worldnodeframe != r_framecount)
+			// LordHavoc: this DotProduct hurts less than a cache miss
+			// (which is more likely to happen if backflowing through leafs)
+			if (DotProduct(modelorg, p->plane.normal) < (p->plane.dist + 1))
 			{
-				leaf->worldnodeframe = r_framecount;
-				// FIXME: R_NotCulledBox is absolute, should be done relative
-				if (leaf->pvsframe == r_pvsframecount && R_NotCulledBox(leaf->mins, leaf->maxs))
-					leafstack[leafstackpos++] = leaf;
+				leaf = p->past;
+				if (leaf->worldnodeframe != r_framecount)
+				{
+					leaf->worldnodeframe = r_framecount;
+					// FIXME: R_NotCulledBox is absolute, should be done relative
+					if (leaf->pvsframe == r_pvsframecount && R_NotCulledBox(leaf->mins, leaf->maxs))
+						leafstack[leafstackpos++] = leaf;
+				}
 			}
 		}
 	}
@@ -1788,7 +1793,6 @@ static void R_PortalWorldNode(entity_render_t *ent, mleaf_t *viewleaf)
 		R_DrawPortals(ent);
 }
 
-
 void R_PVSUpdate (mleaf_t *viewleaf)
 {
 	int i, j, l, c, bits, *surfacepvsframes, *mark;