--- ray/src/common/objutil.h	2021/04/09 15:26:41	2.15
+++ ray/src/common/objutil.h	2022/01/15 16:57:46	2.17
@@ -1,4 +1,4 @@
-/* RCSid $Id: objutil.h,v 2.15 2021/04/09 15:26:41 greg Exp $ */
+/* RCSid $Id: objutil.h,v 2.17 2022/01/15 16:57:46 greg Exp $ */
 /*
  *  Declarations for .OBJ file utility
  *
@@ -181,6 +181,9 @@ extern void	setMaterial(Scene *sc, const char *nm);
 /* Add a new face to our scene, using current group and material */
 extern Face *	addFace(Scene *sc, VNDX vid[], int nv);
 
+/* Get neighbor vertices: malloc array with valence in index[0] */
+extern int *	getVertexNeighbors(Scene *sc, int vid);
+
 /* Expand bounding box min & max (initialize bbox to all zeroes) */
 extern int	growBoundingBox(Scene *sc, double bbox[2][3],
 					int flreq, int flexc);
@@ -208,11 +211,12 @@ extern void     efree(char *cp);
 #define getGroupID(sc,nm)	findName(nm, (const char **)(sc)->grpname, (sc)->ngrps)
 #define getMaterialID(sc,nm)	findName(nm, (const char **)(sc)->matname, (sc)->nmats)
 
-#define CHUNKSIZ	128	/* object allocation chunk size */
+#define CHUNKBITS	7		/* object allocation chunk bits */
+#define CHUNKSIZ	(1<<CHUNKBITS)	/* object allocation chunk size */
 
 #define chunk_alloc(typ, arr, nold) \
-		((nold)%CHUNKSIZ ? (arr) : \
-		(typ *)erealloc((char *)(arr), sizeof(typ)*((nold)+CHUNKSIZ)))
+		((nold)&(CHUNKSIZ-1) ? (arr) : \
+		(typ *)erealloc(arr, sizeof(typ)*((nold)+CHUNKSIZ)))
 
 #ifdef __cplusplus
 }