26 |
|
|
27 |
|
|
28 |
|
char * |
29 |
< |
setview(v) /* set hvec and vvec, return message on error */ |
30 |
< |
register VIEW *v; |
29 |
> |
setview( /* set hvec and vvec, return message on error */ |
30 |
> |
VIEW *v |
31 |
> |
) |
32 |
|
{ |
33 |
|
static char ill_horiz[] = "illegal horizontal view size"; |
34 |
|
static char ill_vert[] = "illegal vertical view size"; |
94 |
|
v->hn2 = 2.0 * sin(v->horiz*(PI/180.0/2.0)); |
95 |
|
v->vn2 = 2.0 * sin(v->vert*(PI/180.0/2.0)); |
96 |
|
break; |
97 |
+ |
case VT_PLS: /* planispheric fisheye */ |
98 |
+ |
if (v->horiz >= 360.0-FTINY) |
99 |
+ |
return(ill_horiz); |
100 |
+ |
if (v->vert >= 360.0-FTINY) |
101 |
+ |
return(ill_vert); |
102 |
+ |
v->hn2 = 2.*sin(v->horiz*(PI/180.0/2.0)) / |
103 |
+ |
(1.0 + cos(v->horiz*(PI/180.0/2.0))); |
104 |
+ |
v->vn2 = 2.*sin(v->vert*(PI/180.0/2.0)) / |
105 |
+ |
(1.0 + cos(v->vert*(PI/180.0/2.0))); |
106 |
+ |
break; |
107 |
|
default: |
108 |
|
return("unknown view type"); |
109 |
|
} |
110 |
< |
if (v->type != VT_ANG) { |
110 |
> |
if (v->type != VT_ANG && v->type != VT_PLS) { |
111 |
|
if (v->type != VT_CYL) { |
112 |
|
v->hvec[0] *= v->hn2; |
113 |
|
v->hvec[1] *= v->hn2; |
125 |
|
|
126 |
|
|
127 |
|
void |
128 |
< |
normaspect(va, ap, xp, yp) /* fix pixel aspect or resolution */ |
129 |
< |
double va; /* view aspect ratio */ |
130 |
< |
double *ap; /* pixel aspect in (or out if 0) */ |
131 |
< |
int *xp, *yp; /* x and y resolution in (or out if *ap!=0) */ |
128 |
> |
normaspect( /* fix pixel aspect or resolution */ |
129 |
> |
double va, /* view aspect ratio */ |
130 |
> |
double *ap, /* pixel aspect in (or out if 0) */ |
131 |
> |
int *xp, |
132 |
> |
int *yp /* x and y resolution in (or out if *ap!=0) */ |
133 |
> |
) |
134 |
|
{ |
135 |
|
if (*ap <= FTINY) |
136 |
|
*ap = va * *xp / *yp; /* compute pixel aspect */ |
142 |
|
|
143 |
|
|
144 |
|
double |
145 |
< |
viewray(orig, direc, v, x, y) /* compute ray origin and direction */ |
146 |
< |
FVECT orig, direc; |
147 |
< |
register VIEW *v; |
148 |
< |
double x, y; |
145 |
> |
viewray( /* compute ray origin and direction */ |
146 |
> |
FVECT orig, |
147 |
> |
FVECT direc, |
148 |
> |
VIEW *v, |
149 |
> |
double x, |
150 |
> |
double y |
151 |
> |
) |
152 |
|
{ |
153 |
|
double d, z; |
154 |
|
|
199 |
|
d = normalize(direc); |
200 |
|
return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0); |
201 |
|
case VT_ANG: /* angular fisheye */ |
202 |
< |
x *= v->horiz/180.0; |
203 |
< |
y *= v->vert/180.0; |
202 |
> |
x *= (1.0/180.0)*v->horiz; |
203 |
> |
y *= (1.0/180.0)*v->vert; |
204 |
|
d = x*x + y*y; |
205 |
|
if (d > 1.0) |
206 |
|
return(-1.0); |
207 |
|
d = sqrt(d); |
208 |
|
z = cos(PI*d); |
209 |
< |
d = d <= FTINY ? PI : sqrt(1 - z*z)/d; |
209 |
> |
d = d <= FTINY ? PI : sqrt(1.0 - z*z)/d; |
210 |
|
x *= d; |
211 |
|
y *= d; |
212 |
|
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
216 |
|
orig[1] = v->vp[1] + v->vfore*direc[1]; |
217 |
|
orig[2] = v->vp[2] + v->vfore*direc[2]; |
218 |
|
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
219 |
+ |
case VT_PLS: /* planispheric fisheye */ |
220 |
+ |
x *= sqrt(v->hn2); |
221 |
+ |
y *= sqrt(v->vn2); |
222 |
+ |
d = x*x + y*y; |
223 |
+ |
z = (1. - d)/(1. + d); |
224 |
+ |
d = d <= FTINY*FTINY ? PI : sqrt((1.0 - z*z)/d); |
225 |
+ |
x *= d; |
226 |
+ |
y *= d; |
227 |
+ |
direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0]; |
228 |
+ |
direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1]; |
229 |
+ |
direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2]; |
230 |
+ |
orig[0] = v->vp[0] + v->vfore*direc[0]; |
231 |
+ |
orig[1] = v->vp[1] + v->vfore*direc[1]; |
232 |
+ |
orig[2] = v->vp[2] + v->vfore*direc[2]; |
233 |
+ |
return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0); |
234 |
|
} |
235 |
|
return(-1.0); |
236 |
|
} |
237 |
|
|
238 |
|
|
239 |
|
void |
240 |
< |
viewloc(ip, v, p) /* find image location for point */ |
241 |
< |
FVECT ip; |
242 |
< |
register VIEW *v; |
243 |
< |
FVECT p; |
240 |
> |
viewloc( /* find image location for point */ |
241 |
> |
FVECT ip, |
242 |
> |
VIEW *v, |
243 |
> |
FVECT p |
244 |
> |
) |
245 |
|
{ |
246 |
|
double d, d2; |
247 |
|
FVECT disp; |
248 |
|
|
249 |
< |
disp[0] = p[0] - v->vp[0]; |
218 |
< |
disp[1] = p[1] - v->vp[1]; |
219 |
< |
disp[2] = p[2] - v->vp[2]; |
249 |
> |
VSUB(disp, p, v->vp); |
250 |
|
|
251 |
|
switch (v->type) { |
252 |
|
case VT_PAR: /* parallel view */ |
295 |
|
ip[0] += 180.0/v->horiz; |
296 |
|
return; |
297 |
|
} |
298 |
< |
d = acos(d)/PI / sqrt(1.0 - d*d); |
299 |
< |
ip[0] += DOT(disp,v->hvec)*d*180.0/v->horiz; |
300 |
< |
ip[1] += DOT(disp,v->vvec)*d*180.0/v->vert; |
298 |
> |
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
299 |
> |
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
300 |
> |
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
301 |
|
return; |
302 |
+ |
case VT_PLS: /* planispheric fisheye */ |
303 |
+ |
ip[0] = 0.5 - v->hoff; |
304 |
+ |
ip[1] = 0.5 - v->voff; |
305 |
+ |
ip[2] = normalize(disp) - v->vfore; |
306 |
+ |
d = DOT(disp,v->vdir); |
307 |
+ |
if (d >= 1.0-FTINY) |
308 |
+ |
return; |
309 |
+ |
if (d <= -(1.0-FTINY)) |
310 |
+ |
return; /* really an error */ |
311 |
+ |
d = sqrt(1.0 - d*d) / (1.0 + d); |
312 |
+ |
ip[0] += DOT(disp,v->hvec)*d/sqrt(v->hn2); |
313 |
+ |
ip[1] += DOT(disp,v->vvec)*d/sqrt(v->vn2); |
314 |
+ |
return; |
315 |
|
} |
316 |
|
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
317 |
|
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
319 |
|
|
320 |
|
|
321 |
|
void |
322 |
< |
pix2loc(loc, rp, px, py) /* compute image location from pixel pos. */ |
323 |
< |
RREAL loc[2]; |
324 |
< |
register RESOLU *rp; |
325 |
< |
int px, py; |
322 |
> |
pix2loc( /* compute image location from pixel pos. */ |
323 |
> |
RREAL loc[2], |
324 |
> |
RESOLU *rp, |
325 |
> |
int px, |
326 |
> |
int py |
327 |
> |
) |
328 |
|
{ |
329 |
< |
register int x, y; |
329 |
> |
int x, y; |
330 |
|
|
331 |
|
if (rp->rt & YMAJOR) { |
332 |
|
x = px; |
345 |
|
|
346 |
|
|
347 |
|
void |
348 |
< |
loc2pix(pp, rp, lx, ly) /* compute pixel pos. from image location */ |
349 |
< |
int pp[2]; |
350 |
< |
register RESOLU *rp; |
351 |
< |
double lx, ly; |
348 |
> |
loc2pix( /* compute pixel pos. from image location */ |
349 |
> |
int pp[2], |
350 |
> |
RESOLU *rp, |
351 |
> |
double lx, |
352 |
> |
double ly |
353 |
> |
) |
354 |
|
{ |
355 |
< |
register int x, y; |
355 |
> |
int x, y; |
356 |
|
|
357 |
< |
x = lx * rp->xr; |
358 |
< |
y = ly * rp->yr; |
357 |
> |
x = (lx >= 0.0) ? (int)(lx * rp->xr) : -(int)(-lx * rp->xr); |
358 |
> |
y = (ly >= 0.0) ? (int)(ly * rp->yr) : -(int)(-ly * rp->yr); |
359 |
|
if (rp->rt & XDECR) |
360 |
|
x = rp->xr-1 - x; |
361 |
|
if (rp->rt & YDECR) |
371 |
|
|
372 |
|
|
373 |
|
int |
374 |
< |
getviewopt(v, ac, av) /* process view argument */ |
375 |
< |
register VIEW *v; |
376 |
< |
int ac; |
377 |
< |
register char *av[]; |
374 |
> |
getviewopt( /* process view argument */ |
375 |
> |
VIEW *v, |
376 |
> |
int ac, |
377 |
> |
char *av[] |
378 |
> |
) |
379 |
|
{ |
380 |
|
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
381 |
|
badarg(ac-1,av+1,l)) return(-1) |
440 |
|
|
441 |
|
|
442 |
|
int |
443 |
< |
sscanview(vp, s) /* get view parameters from string */ |
444 |
< |
VIEW *vp; |
445 |
< |
register char *s; |
443 |
> |
sscanview( /* get view parameters from string */ |
444 |
> |
VIEW *vp, |
445 |
> |
char *s |
446 |
> |
) |
447 |
|
{ |
448 |
|
int ac; |
449 |
|
char *av[4]; |
475 |
|
|
476 |
|
|
477 |
|
void |
478 |
< |
fprintview(vp, fp) /* write out view parameters */ |
479 |
< |
register VIEW *vp; |
480 |
< |
FILE *fp; |
478 |
> |
fprintview( /* write out view parameters */ |
479 |
> |
VIEW *vp, |
480 |
> |
FILE *fp |
481 |
> |
) |
482 |
|
{ |
483 |
|
fprintf(fp, " -vt%c", vp->type); |
484 |
|
fprintf(fp, " -vp %.6g %.6g %.6g", vp->vp[0], vp->vp[1], vp->vp[2]); |
493 |
|
|
494 |
|
|
495 |
|
char * |
496 |
< |
viewopt(vp) /* translate to minimal view string */ |
497 |
< |
register VIEW *vp; |
496 |
> |
viewopt( /* translate to minimal view string */ |
497 |
> |
VIEW *vp |
498 |
> |
) |
499 |
|
{ |
500 |
|
static char vwstr[128]; |
501 |
< |
register char *cp = vwstr; |
501 |
> |
char *cp = vwstr; |
502 |
|
|
503 |
|
*cp = '\0'; |
504 |
|
if (vp->type != stdview.type) { |
551 |
|
|
552 |
|
|
553 |
|
int |
554 |
< |
isview(s) /* is this a view string? */ |
555 |
< |
char *s; |
554 |
> |
isview( /* is this a view string? */ |
555 |
> |
char *s |
556 |
> |
) |
557 |
|
{ |
558 |
|
static char *altname[]={NULL,VIEWSTR,"rpict","rview","rvu","rpiece","pinterp",NULL}; |
559 |
|
extern char *progname; |
560 |
< |
register char *cp; |
561 |
< |
register char **an; |
560 |
> |
char *cp; |
561 |
> |
char **an; |
562 |
|
/* add program name to list */ |
563 |
|
if (altname[0] == NULL) { |
564 |
|
for (cp = progname; *cp; cp++) |
599 |
|
|
600 |
|
|
601 |
|
int |
602 |
< |
viewfile(fname, vp, rp) /* get view from file */ |
603 |
< |
char *fname; |
604 |
< |
VIEW *vp; |
605 |
< |
RESOLU *rp; |
602 |
> |
viewfile( /* get view from file */ |
603 |
> |
char *fname, |
604 |
> |
VIEW *vp, |
605 |
> |
RESOLU *rp |
606 |
> |
) |
607 |
|
{ |
608 |
|
struct myview mvs; |
609 |
|
FILE *fp; |