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Comparing ray/src/common/image.c (file contents):
Revision 2.8 by greg, Wed Dec 21 09:07:19 1994 UTC vs.
Revision 2.16 by greg, Sat Feb 22 02:07:22 2003 UTC

# Line 1 | Line 1
1 – /* Copyright (c) 1994 Regents of the University of California */
2 –
1   #ifndef lint
2 < static char SCCSid[] = "$SunId$ LBL";
2 > static const char       RCSid[] = "$Id$";
3   #endif
6 –
4   /*
5   *  image.c - routines for image generation.
6   *
7 < *     10/17/85
7 > *  External symbols declared in view.h
8   */
9  
10 + /* ====================================================================
11 + * The Radiance Software License, Version 1.0
12 + *
13 + * Copyright (c) 1990 - 2002 The Regents of the University of California,
14 + * through Lawrence Berkeley National Laboratory.   All rights reserved.
15 + *
16 + * Redistribution and use in source and binary forms, with or without
17 + * modification, are permitted provided that the following conditions
18 + * are met:
19 + *
20 + * 1. Redistributions of source code must retain the above copyright
21 + *         notice, this list of conditions and the following disclaimer.
22 + *
23 + * 2. Redistributions in binary form must reproduce the above copyright
24 + *       notice, this list of conditions and the following disclaimer in
25 + *       the documentation and/or other materials provided with the
26 + *       distribution.
27 + *
28 + * 3. The end-user documentation included with the redistribution,
29 + *           if any, must include the following acknowledgment:
30 + *             "This product includes Radiance software
31 + *                 (http://radsite.lbl.gov/)
32 + *                 developed by the Lawrence Berkeley National Laboratory
33 + *               (http://www.lbl.gov/)."
34 + *       Alternately, this acknowledgment may appear in the software itself,
35 + *       if and wherever such third-party acknowledgments normally appear.
36 + *
37 + * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
38 + *       and "The Regents of the University of California" must
39 + *       not be used to endorse or promote products derived from this
40 + *       software without prior written permission. For written
41 + *       permission, please contact [email protected].
42 + *
43 + * 5. Products derived from this software may not be called "Radiance",
44 + *       nor may "Radiance" appear in their name, without prior written
45 + *       permission of Lawrence Berkeley National Laboratory.
46 + *
47 + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
48 + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49 + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
50 + * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
51 + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53 + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
54 + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
55 + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
56 + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
57 + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 + * SUCH DAMAGE.
59 + * ====================================================================
60 + *
61 + * This software consists of voluntary contributions made by many
62 + * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
63 + * information on Lawrence Berkeley National Laboratory, please see
64 + * <http://www.lbl.gov/>.
65 + */
66 +
67   #include  "standard.h"
68  
69   #include  "view.h"
70  
17 – #include  "resolu.h"
18 –
71   #include  "paths.h"
72  
73 + #define  FEQ(x,y)       (fabs((x)-(y)) <= FTINY)
74 + #define  VEQ(v,w)       (FEQ((v)[0],(w)[0]) && FEQ((v)[1],(w)[1]) \
75 +                                && FEQ((v)[2],(w)[2]))
76 +
77   VIEW  stdview = STDVIEW;                /* default view parameters */
78  
79  
# Line 28 | Line 84 | register VIEW  *v;
84          static char  ill_horiz[] = "illegal horizontal view size";
85          static char  ill_vert[] = "illegal vertical view size";
86          
87 <        if (v->vfore < -FTINY || v->vaft < -FTINY ||
32 <                        (v->vaft > FTINY && v->vaft <= v->vfore))
87 >        if (v->vaft < -FTINY || (v->vaft > FTINY && v->vaft <= v->vfore))
88                  return("illegal fore/aft clipping plane");
89  
90          if (normalize(v->vdir) == 0.0)          /* normalize direction */
# Line 63 | Line 118 | register VIEW  *v;
118                  v->hn2 = 2.0 * tan(v->horiz*(PI/180.0/2.0));
119                  v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0));
120                  break;
121 +        case VT_CYL:                            /* cylindrical panorama */
122 +                if (v->horiz > 360.0+FTINY)
123 +                        return(ill_horiz);
124 +                if (v->vert >= 180.0-FTINY)
125 +                        return(ill_vert);
126 +                v->hn2 = v->horiz * (PI/180.0);
127 +                v->vn2 = 2.0 * tan(v->vert*(PI/180.0/2.0));
128 +                break;
129          case VT_ANG:                            /* angular fisheye */
130                  if (v->horiz > 360.0+FTINY)
131                          return(ill_horiz);
132                  if (v->vert > 360.0+FTINY)
133                          return(ill_vert);
134 <                v->hn2 = v->horiz / 90.0;
135 <                v->vn2 = v->vert / 90.0;
134 >                v->hn2 = v->horiz * (PI/180.0);
135 >                v->vn2 = v->vert * (PI/180.0);
136                  break;
137          case VT_HEM:                            /* hemispherical fisheye */
138                  if (v->horiz > 180.0+FTINY)
# Line 83 | Line 146 | register VIEW  *v;
146                  return("unknown view type");
147          }
148          if (v->type != VT_ANG) {
149 <                v->hvec[0] *= v->hn2;
150 <                v->hvec[1] *= v->hn2;
151 <                v->hvec[2] *= v->hn2;
149 >                if (v->type != VT_CYL) {
150 >                        v->hvec[0] *= v->hn2;
151 >                        v->hvec[1] *= v->hn2;
152 >                        v->hvec[2] *= v->hn2;
153 >                }
154                  v->vvec[0] *= v->vn2;
155                  v->vvec[1] *= v->vn2;
156                  v->vvec[2] *= v->vn2;
# Line 97 | Line 162 | register VIEW  *v;
162   }
163  
164  
165 + void
166   normaspect(va, ap, xp, yp)              /* fix pixel aspect or resolution */
167   double  va;                     /* view aspect ratio */
168   double  *ap;                    /* pixel aspect in (or out if 0) */
# Line 153 | Line 219 | double  x, y;
219                  orig[1] = v->vp[1] + v->vfore*direc[1];
220                  orig[2] = v->vp[2] + v->vfore*direc[2];
221                  return(v->vaft > FTINY ? v->vaft - v->vfore : 0.0);
222 +        case VT_CYL:                    /* cylindrical panorama */
223 +                d = x * v->horiz * (PI/180.0);
224 +                z = cos(d);
225 +                x = sin(d);
226 +                direc[0] = z*v->vdir[0] + x*v->hvec[0] + y*v->vvec[0];
227 +                direc[1] = z*v->vdir[1] + x*v->hvec[1] + y*v->vvec[1];
228 +                direc[2] = z*v->vdir[2] + x*v->hvec[2] + y*v->vvec[2];
229 +                orig[0] = v->vp[0] + v->vfore*direc[0];
230 +                orig[1] = v->vp[1] + v->vfore*direc[1];
231 +                orig[2] = v->vp[2] + v->vfore*direc[2];
232 +                d = normalize(direc);
233 +                return(v->vaft > FTINY ? (v->vaft - v->vfore)*d : 0.0);
234          case VT_ANG:                    /* angular fisheye */
235                  x *= v->horiz/180.0;
236                  y *= v->vert/180.0;
# Line 176 | Line 254 | double  x, y;
254   }
255  
256  
257 + void
258   viewloc(ip, v, p)               /* find image location for point */
259   FVECT  ip;
260   register VIEW  *v;
261   FVECT  p;
262   {
263 <        double  d;
263 >        double  d, d2;
264          FVECT  disp;
265  
266          disp[0] = p[0] - v->vp[0];
# Line 194 | Line 273 | FVECT  p;
273                  break;
274          case VT_PER:                    /* perspective view */
275                  d = DOT(disp,v->vdir);
276 <                ip[2] = sqrt(DOT(disp,disp));
276 >                ip[2] = VLEN(disp);
277                  if (d < 0.0) {          /* fold pyramid */
278                          ip[2] = -ip[2];
279                          d = -d;
# Line 215 | Line 294 | FVECT  p;
294                          ip[2] = d;
295                  ip[2] -= v->vfore;
296                  break;
297 +        case VT_CYL:                    /* cylindrical panorama */
298 +                d = DOT(disp,v->hvec);
299 +                d2 = DOT(disp,v->vdir);
300 +                ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff;
301 +                d = 1.0/sqrt(d*d + d2*d2);
302 +                ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff;
303 +                ip[2] = VLEN(disp);
304 +                ip[2] *= (1.0 - v->vfore*d);
305 +                return;
306          case VT_ANG:                    /* angular fisheye */
307                  ip[0] = 0.5 - v->hoff;
308                  ip[1] = 0.5 - v->voff;
# Line 224 | Line 312 | FVECT  p;
312                          return;
313                  if (d <= -(1.0-FTINY)) {
314                          ip[0] += 180.0/v->horiz;
227 –                        ip[1] += 180.0/v->vert;
315                          return;
316                  }
317                  d = acos(d)/PI / sqrt(1.0 - d*d);
# Line 237 | Line 324 | FVECT  p;
324   }
325  
326  
327 + void
328   pix2loc(loc, rp, px, py)        /* compute image location from pixel pos. */
329   FLOAT  loc[2];
330   register RESOLU  *rp;
# Line 244 | Line 332 | int  px, py;
332   {
333          register int  x, y;
334  
335 <        if (rp->or & YMAJOR) {
335 >        if (rp->rt & YMAJOR) {
336                  x = px;
337                  y = py;
338          } else {
339                  x = py;
340                  y = px;
341          }
342 <        if (rp->or & XDECR)
342 >        if (rp->rt & XDECR)
343                  x = rp->xr-1 - x;
344 <        if (rp->or & YDECR)
344 >        if (rp->rt & YDECR)
345                  y = rp->yr-1 - y;
346          loc[0] = (x+.5)/rp->xr;
347          loc[1] = (y+.5)/rp->yr;
348   }
349  
350  
351 + void
352   loc2pix(pp, rp, lx, ly)         /* compute pixel pos. from image location */
353   int  pp[2];
354   register RESOLU  *rp;
# Line 269 | Line 358 | double  lx, ly;
358  
359          x = lx * rp->xr;
360          y = ly * rp->yr;
361 <        if (rp->or & XDECR)
361 >        if (rp->rt & XDECR)
362                  x = rp->xr-1 - x;
363 <        if (rp->or & YDECR)
363 >        if (rp->rt & YDECR)
364                  y = rp->yr-1 - y;
365 <        if (rp->or & YMAJOR) {
365 >        if (rp->rt & YMAJOR) {
366                  pp[0] = x;
367                  pp[1] = y;
368          } else {
# Line 361 | Line 450 | register char  *s;
450          int  nvopts = 0;
451  
452          if (*s != '-')
453 <                s = sskip(s);
453 >                s = sskip2(s,1);
454          while (*s) {
455                  ac = 0;
456                  do {
# Line 382 | Line 471 | register char  *s;
471   }
472  
473  
474 + void
475   fprintview(vp, fp)                      /* write out view parameters */
476   register VIEW  *vp;
477   FILE  *fp;
# Line 396 | Line 486 | FILE  *fp;
486   }
487  
488  
489 + char *
490 + viewopt(vp)                             /* translate to minimal view string */
491 + register VIEW  *vp;
492 + {
493 +        static char  vwstr[128];
494 +        register char  *cp = vwstr;
495 +
496 +        if (vp->type != stdview.type) {
497 +                sprintf(cp, " -vt%c", vp->type);
498 +                cp += strlen(cp);
499 +        }
500 +        if (!VEQ(vp->vp,stdview.vp)) {
501 +                sprintf(cp, " -vp %.6g %.6g %.6g",
502 +                                vp->vp[0], vp->vp[1], vp->vp[2]);
503 +                cp += strlen(cp);
504 +        }
505 +        if (!VEQ(vp->vdir,stdview.vdir)) {
506 +                sprintf(cp, " -vd %.6g %.6g %.6g",
507 +                                vp->vdir[0], vp->vdir[1], vp->vdir[2]);
508 +                cp += strlen(cp);
509 +        }
510 +        if (!VEQ(vp->vup,stdview.vup)) {
511 +                sprintf(cp, " -vu %.6g %.6g %.6g",
512 +                                vp->vup[0], vp->vup[1], vp->vup[2]);
513 +                cp += strlen(cp);
514 +        }
515 +        if (!FEQ(vp->horiz,stdview.horiz)) {
516 +                sprintf(cp, " -vh %.6g", vp->horiz);
517 +                cp += strlen(cp);
518 +        }
519 +        if (!FEQ(vp->vert,stdview.vert)) {
520 +                sprintf(cp, " -vv %.6g", vp->vert);
521 +                cp += strlen(cp);
522 +        }
523 +        if (!FEQ(vp->vfore,stdview.vfore)) {
524 +                sprintf(cp, " -vo %.6g", vp->vfore);
525 +                cp += strlen(cp);
526 +        }
527 +        if (!FEQ(vp->vaft,stdview.vaft)) {
528 +                sprintf(cp, " -va %.6g", vp->vaft);
529 +                cp += strlen(cp);
530 +        }
531 +        if (!FEQ(vp->hoff,stdview.hoff)) {
532 +                sprintf(cp, " -vs %.6g", vp->hoff);
533 +                cp += strlen(cp);
534 +        }
535 +        if (!FEQ(vp->voff,stdview.voff)) {
536 +                sprintf(cp, " -vl %.6g", vp->voff);
537 +                cp += strlen(cp);
538 +        }
539 +        return(vwstr);
540 + }
541 +
542 +
543   int
544   isview(s)                               /* is this a view string? */
545   char  *s;
# Line 431 | Line 575 | struct myview {
575   };
576  
577  
578 < static
578 > static int
579   gethview(s, v)                          /* get view from header */
580   char  *s;
581   register struct myview  *v;
582   {
583          if (isview(s) && sscanview(v->hv, s) > 0)
584                  v->ok++;
585 +        return(0);
586   }
587  
588  
# Line 450 | Line 595 | RESOLU  *rp;
595          struct myview   mvs;
596          FILE  *fp;
597  
598 <        if ((fp = fopen(fname, "r")) == NULL)
598 >        if (fname == NULL || !strcmp(fname, "-"))
599 >                fp = stdin;
600 >        else if ((fp = fopen(fname, "r")) == NULL)
601                  return(-1);
602  
603          mvs.hv = vp;
604          mvs.ok = 0;
605  
606 <        getheader(fp, gethview, &mvs);
606 >        getheader(fp, (int (*)(char *, char *))&gethview, (char *)&mvs);
607  
608          if (rp != NULL && !fgetsresolu(rp, fp))
609                  mvs.ok = 0;

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