Added R_GetLineForSide

skyjake · Mar 12, 2003 · a7f112e · a7f112e
1 parent 81a3574
commit a7f112e
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Showing 2 changed files with 23 additions and 2 deletions.
diff --git a/doomsday/Include/r_util.h b/doomsday/Include/r_util.h
@@ -9,7 +9,7 @@ int         R_PointOnSegSide (fixed_t x, fixed_t y, seg_t *line);
 angle_t		R_PointToAngle (fixed_t x, fixed_t y);
 angle_t		R_PointToAngle2 (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2);
 fixed_t		R_PointToDist (fixed_t x, fixed_t y);
-subsector_t *R_PointInSubsector (fixed_t x, fixed_t y);
-
+subsector_t* R_PointInSubsector (fixed_t x, fixed_t y);
+line_t*		R_GetLineForSide(int sideNumber);
 
 #endif 
diff --git a/doomsday/Src/r_util.c b/doomsday/Src/r_util.c
@@ -247,3 +247,24 @@ subsector_t *R_PointInSubsector (fixed_t x, fixed_t y)
 	return SUBSECTOR_PTR(nodenum & ~NF_SUBSECTOR);
 }
 
+//===========================================================================
+// R_GetLineForSide
+//===========================================================================
+line_t *R_GetLineForSide(int sideNumber)
+{
+	side_t *side = SIDE_PTR(sideNumber);
+	sector_t *sector = side->sector;
+	int i;
+
+	// Do all sides have a sector? (Possibly...)
+	if(!sector) return NULL;
+
+	for(i = 0; i < sector->linecount; i++)
+		if(sector->lines[i]->sidenum[0] == sideNumber 
+			|| sector->lines[i]->sidenum[1] == sideNumber)
+		{
+			return sector->lines[i];
+		}
+
+	return NULL;
+}