#6095: OpenGL2: Use areamask and leaf cluster for PVS when VIS is missing.

1 files changed, 13 insertions, 32 deletions

diff --git a/src/renderergl2/tr_world.c b/src/renderergl2/tr_world.c
index 1a25d26a..6608d70b 100644
--- a/src/renderergl2/tr_world.c
+++ b/src/renderergl2/tr_world.c
@@ -645,7 +645,7 @@ R_ClusterPVS
 */
 static const byte *R_ClusterPVS (int cluster) {
 	if (!tr.world->vis || cluster < 0 || cluster >= tr.world->numClusters ) {
-		return tr.world->novis;
+		return NULL;
 	}
 
 	return tr.world->vis + cluster * tr.world->clusterBytes;
@@ -699,29 +699,21 @@ static void R_MarkLeaves (void) {
 
 	for(i = 0; i < MAX_VISCOUNTS; i++)
 	{
-		if(tr.visClusters[i] == cluster)
+		// if the areamask or r_showcluster was modified, invalidate all visclusters
+		// this caused doors to open into undrawn areas
+		if (tr.refdef.areamaskModified || r_showcluster->modified)
 		{
-			//tr.visIndex = i;
-			break;
+			tr.visClusters[i] = -2;
 		}
-	}
-
-	// if r_showcluster was just turned on, remark everything 
-	if(i != MAX_VISCOUNTS && !tr.refdef.areamaskModified && !r_showcluster->modified)// && !r_dynamicBspOcclusionCulling->modified)
-	{
-		if(tr.visClusters[i] != tr.visClusters[tr.visIndex] && r_showcluster->integer)
+		else if(tr.visClusters[i] == cluster)
 		{
-			ri.Printf(PRINT_ALL, "found cluster:%i  area:%i  index:%i\n", cluster, leaf->area, i);
+			if(tr.visClusters[i] != tr.visClusters[tr.visIndex] && r_showcluster->integer)
+			{
+				ri.Printf(PRINT_ALL, "found cluster:%i  area:%i  index:%i\n", cluster, leaf->area, i);
+			}
+			tr.visIndex = i;
+			return;
 		}
-		tr.visIndex = i;
-		return;
-	}
-
-	// if the areamask was modified, invalidate all visclusters
-	// this caused doors to open into undrawn areas
-	if (tr.refdef.areamaskModified)
-	{
-		memset(tr.visClusters, -2, sizeof(tr.visClusters));
 	}
 
 	tr.visIndex = (tr.visIndex + 1) % MAX_VISCOUNTS;
@@ -735,17 +727,6 @@ static void R_MarkLeaves (void) {
 		}
 	}
 
-	// set all nodes to visible if there is no vis
-	// this caused some levels to simply not render
-	if (r_novis->integer || !tr.world->vis || tr.visClusters[tr.visIndex] == -1) {
-		for (i=0 ; i<tr.world->numnodes ; i++) {
-			if (tr.world->nodes[i].contents != CONTENTS_SOLID) {
-				tr.world->nodes[i].visCounts[tr.visIndex] = tr.visCounts[tr.visIndex];
-			}
-		}
-		return;
-	}
-
 	vis = R_ClusterPVS(tr.visClusters[tr.visIndex]);
 	
 	for (i=0,leaf=tr.world->nodes ; i<tr.world->numnodes ; i++, leaf++) {
@@ -755,7 +736,7 @@ static void R_MarkLeaves (void) {
 		}
 
 		// check general pvs
-		if ( !(vis[cluster>>3] & (1<<(cluster&7))) ) {
+		if ( vis && !(vis[cluster>>3] & (1<<(cluster&7))) ) {
 			continue;
 		}