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root/radiance/ray/src/hd/rhdisp.c
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Comparing ray/src/hd/rhdisp.c (file contents):
Revision 3.15 by gregl, Mon Dec 15 20:43:48 1997 UTC vs.
Revision 3.16 by gregl, Thu Dec 18 18:14:15 1997 UTC

# Line 15 | Line 15 | static char SCCSid[] = "$SunId$ SGI";
15   #include <ctype.h>
16  
17   #ifndef VIEWHISTLEN
18 < #define VIEWHISTLEN     2       /* number of remembered views */
18 > #define VIEWHISTLEN     4       /* number of remembered views */
19   #endif
20  
21   HOLO    *hdlist[HDMAX+1];       /* global holodeck list */
# Line 214 | Line 214 | register VIEW  *v;
214          char    *err;
215                                  /* restore previous view? */
216          if (v == NULL) {
217 <                if (nhist < 2) {
218 <                        error(COMMAND, "no previous view");
219 <                        return;
220 <                }
221 <                nhist--;        /* get one before last setting */
217 >                if (nhist > 1)          /* get one before last setting */
218 >                        nhist--;
219 >                else                    /* else go to end of list */
220 >                        while (nhist < VIEWHISTLEN && viewhist[nhist].type)
221 >                                nhist++;
222                  v = viewhist + ((nhist-1)%VIEWHISTLEN);
223          } else if ((err = setview(v)) != NULL) {
224                  error(COMMAND, err);

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