--- ray/src/hd/rhdobj.h	1998/08/21 11:38:22	3.2
+++ ray/src/hd/rhdobj.h	2003/07/14 22:24:00	3.7
@@ -1,11 +1,14 @@
-/* Copyright (c) 1998 Silicon Graphics, Inc. */
-
-/* SCCSid "$SunId$ SGI" */
-
+/* RCSid: $Id: rhdobj.h,v 3.7 2003/07/14 22:24:00 schorsch Exp $ */
 /*
  * Header file for object display routines for rholo drivers.
  */
+#ifndef _RAD_RHDOBJ_H_
+#define _RAD_RHDOBJ_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 				/* additional user commands */
 #define DO_LOAD		0		/* load octree object */
 #define DO_UNLOAD	1		/* unload (free) octree object */
@@ -21,7 +24,7 @@
 #define DO_NCMDS	10		/* number of object display commands */
 
 					/* commands entered on stdin only */
-#define DO_INIT		{"load","unload","xform","move","unmove","dup",\
+#define DO_INIT		{"load","clear","xform","move","unmove","dup",\
 				"show","light","hide","object"}
 
 /*******************************************************************
@@ -44,8 +47,9 @@ int
 dobj_command(cmd, args)		: check/run object display command
 char	*cmd, *args;		: command name and argument string
 
-Check to see if this is an object display command, and return the command
-number after running it if it is, or -1 if it isn't.  Error messages should
+Check to see if this is an object display command, and return -1 if
+it isn't.  If it is a valid command that results in some visible
+change, return non-zero, otherwise return 0.  Error messages should
 be printed with error(COMMAND,err).
 
 
@@ -61,13 +65,14 @@ of the intersected object is returned, or "" if none. 
 then all visible objects are checked, but the name is not returned.
 
 
-void
+int
 dobj_render()			: render visible objects to OpenGL
 
 Renders all display objects using OpenGL, assuming desired view has
 been set.  This routine also assumes that the tone-mapping library
 is being used to set exposure, and it queries this information to
-adjust light sources as necessary for illuminated objects.
+adjust light sources as necessary for illuminated objects.  Returns
+the number of objects rendered.
 
 
 void
@@ -149,3 +154,9 @@ extern double	dobj_trace();
 extern char	rhdcmd[DO_NCMDS][8];
 
 extern int	(*dobj_lightsamp)();	/* pointer to function to get lights */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RHDOBJ_H_ */
+