--- ray/src/meta/rast.h	2003/02/22 02:07:26	1.1
+++ ray/src/meta/rast.h	2019/11/18 22:12:32	1.3
@@ -1,8 +1,14 @@
-/* RCSid: $Id: rast.h,v 1.1 2003/02/22 02:07:26 greg Exp $ */
+/* RCSid: $Id: rast.h,v 1.3 2019/11/18 22:12:32 greg Exp $ */
 /*
  *   Structures for line segment output to raster files
  */
+#ifndef _RAD_RAST_H_
+#define _RAD_RAST_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define  NUMSCANS	16		/* number of scanlines per block */
 
 typedef struct {			/* raster scanline block */
@@ -33,10 +39,16 @@ extern SCANBLOCK  outblock;		/* output span */
 
 #define  pixmix(x,y,c)	(outblock.cols[(y)-outblock.ybot][x] &= 070|(c))
 
-#define  someabove(p,y)	(CONV((p)->xy[YMX],dysize) > (y))
-#define  somebelow(p,y)	(CONV((p)->xy[YMN],dysize) < (y))
+#define  someabove(p,y)	(CONV((p)->xy[YMX],dysiz) > (y))
+#define  somebelow(p,y)	(CONV((p)->xy[YMN],dysiz) < (y))
 
 #define  inthis(p)	(ydown ? someabove(p,outblock.ybot-1) : \
 				somebelow(p,outblock.ytop+1))
 #define  innext(p)	(ydown ? somebelow(p,outblock.ybot) : \
 				someabove(p,outblock.ytop))
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RAST_H_ */
+