27 |
|
if (normalize(v->vdir) == 0.0) /* normalize direction */ |
28 |
|
return("zero view direction"); |
29 |
|
|
30 |
+ |
if (normalize(v->vup) == 0.0) /* normalize view up */ |
31 |
+ |
return("zero view up vector"); |
32 |
+ |
|
33 |
|
fcross(v->hvec, v->vdir, v->vup); /* compute horiz dir */ |
34 |
|
|
35 |
|
if (normalize(v->hvec) == 0.0) |
36 |
< |
return("illegal view up vector"); |
36 |
> |
return("view up parallel to view direction"); |
37 |
|
|
38 |
|
fcross(v->vvec, v->hvec, v->vdir); /* compute vert dir */ |
39 |
|
|
332 |
|
} |
333 |
|
|
334 |
|
|
332 |
– |
static VIEW *hview; /* view from header */ |
333 |
– |
static int gothview; /* success indicator */ |
335 |
|
static char *altname[] = {NULL,"rpict","rview","pinterp",VIEWSTR,NULL}; |
336 |
|
|
337 |
+ |
struct myview { |
338 |
+ |
VIEW *hv; |
339 |
+ |
int ok; |
340 |
+ |
}; |
341 |
|
|
342 |
+ |
|
343 |
|
static |
344 |
< |
gethview(s) /* get view from header */ |
344 |
> |
gethview(s, v) /* get view from header */ |
345 |
|
char *s; |
346 |
+ |
register struct myview *v; |
347 |
|
{ |
348 |
|
register char **an; |
349 |
|
|
350 |
|
for (an = altname; *an != NULL; an++) |
351 |
|
if (!strncmp(*an, s, strlen(*an))) { |
352 |
< |
if (sscanview(hview, s+strlen(*an)) > 0) |
353 |
< |
gothview++; |
352 |
> |
if (sscanview(v->hv, s+strlen(*an)) > 0) |
353 |
> |
v->ok++; |
354 |
|
return; |
355 |
|
} |
356 |
|
} |
363 |
|
int *xp, *yp; |
364 |
|
{ |
365 |
|
extern char *progname; |
366 |
+ |
struct myview mvs; |
367 |
|
FILE *fp; |
368 |
|
|
369 |
|
if ((fp = fopen(fname, "r")) == NULL) |
370 |
|
return(-1); |
371 |
|
|
372 |
|
altname[0] = progname; |
373 |
< |
hview = vp; |
374 |
< |
gothview = 0; |
373 |
> |
mvs.hv = vp; |
374 |
> |
mvs.ok = 0; |
375 |
|
|
376 |
< |
getheader(fp, gethview); |
376 |
> |
getheader(fp, gethview, &mvs); |
377 |
|
|
378 |
|
if (xp != NULL && yp != NULL |
379 |
|
&& fgetresolu(xp, yp, fp) == -1) |
380 |
< |
gothview = 0; |
380 |
> |
mvs.ok = 0; |
381 |
|
|
382 |
|
fclose(fp); |
383 |
|
|
384 |
< |
return(gothview); |
384 |
> |
return(mvs.ok); |
385 |
|
} |