| 1 |
– |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
| 2 |
– |
|
| 1 |
|
#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ SGI"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 6 |
– |
|
| 4 |
|
/* |
| 5 |
|
* Compute rays corresponding to a given picture or view. |
| 6 |
|
*/ |
| 7 |
|
|
| 8 |
< |
|
| 8 |
> |
#include "platform.h" |
| 9 |
|
#include "standard.h" |
| 13 |
– |
|
| 10 |
|
#include "view.h" |
| 11 |
|
|
| 16 |
– |
#include "resolu.h" |
| 17 |
– |
|
| 12 |
|
extern int putf(), putd(), puta(); |
| 13 |
|
|
| 14 |
|
int (*putr)() = puta; |
| 21 |
|
|
| 22 |
|
int zfd = -1; |
| 23 |
|
|
| 24 |
+ |
int fromstdin = 0; |
| 25 |
+ |
|
| 26 |
|
char *progname; |
| 27 |
|
|
| 28 |
|
|
| 92 |
|
case 'p': /* pixel aspect ratio */ |
| 93 |
|
pa = atof(argv[++i]); |
| 94 |
|
break; |
| 95 |
+ |
case 'i': /* get pixels from stdin */ |
| 96 |
+ |
fromstdin = 1; |
| 97 |
+ |
break; |
| 98 |
|
default: |
| 99 |
|
goto userr; |
| 100 |
|
} |
| 101 |
< |
if (i > argc | i+2 < argc) |
| 101 |
> |
if ((i > argc) | (i+2 < argc)) |
| 102 |
|
goto userr; |
| 103 |
|
if (i < argc) { |
| 104 |
|
rval = viewfile(argv[i], &vw, &rs); |
| 127 |
|
vw.vaft > FTINY ? '+' : '-'); |
| 128 |
|
exit(0); |
| 129 |
|
} |
| 130 |
< |
putrays(); |
| 130 |
> |
if (fromstdin) |
| 131 |
> |
pix2rays(stdin); |
| 132 |
> |
else |
| 133 |
> |
putrays(); |
| 134 |
|
exit(0); |
| 135 |
|
userr: |
| 136 |
|
fprintf(stderr, |
| 137 |
< |
"Usage: %s [ -f{a|f|d} | -d ] { view opts .. | picture [zbuf] }\n", |
| 137 |
> |
"Usage: %s [ -i -f{a|f|d} | -d ] { view opts .. | picture [zbuf] }\n", |
| 138 |
|
progname); |
| 139 |
|
exit(1); |
| 140 |
|
} |
| 141 |
|
|
| 142 |
|
|
| 143 |
+ |
pix2rays(FILE *fp) |
| 144 |
+ |
{ |
| 145 |
+ |
static FVECT rorg, rdir; |
| 146 |
+ |
float zval; |
| 147 |
+ |
double px, py; |
| 148 |
+ |
int pp[2]; |
| 149 |
+ |
double d; |
| 150 |
+ |
register int i; |
| 151 |
+ |
|
| 152 |
+ |
while (fscanf(fp, "%lf %lf", &px, &py) == 2) { |
| 153 |
+ |
if (px < 0 || px >= rs.xr || |
| 154 |
+ |
py < 0 || py >= rs.yr) { |
| 155 |
+ |
fprintf(stderr, |
| 156 |
+ |
"%s: (x,y) pair (%.0f,%.0f) out of range\n", |
| 157 |
+ |
progname, px, py); |
| 158 |
+ |
exit(1); |
| 159 |
+ |
} |
| 160 |
+ |
if (zfd >= 0) { |
| 161 |
+ |
loc2pix(pp, &rs, px/rs.xr, py/rs.yr); |
| 162 |
+ |
if (lseek(zfd, |
| 163 |
+ |
(pp[1]*scanlen(&rs)+pp[0])*sizeof(float), |
| 164 |
+ |
SEEK_SET) < 0 || |
| 165 |
+ |
read(zfd, &zval, sizeof(float)) |
| 166 |
+ |
< sizeof(float)) { |
| 167 |
+ |
fprintf(stderr, "%s: depth buffer read error\n", |
| 168 |
+ |
progname); |
| 169 |
+ |
exit(1); |
| 170 |
+ |
} |
| 171 |
+ |
} |
| 172 |
+ |
d = viewray(rorg, rdir, &vw, px/rs.xr, py/rs.yr); |
| 173 |
+ |
if (d < -FTINY) |
| 174 |
+ |
rorg[0] = rorg[1] = rorg[2] = |
| 175 |
+ |
rdir[0] = rdir[1] = rdir[2] = 0.; |
| 176 |
+ |
else if (zfd >= 0) |
| 177 |
+ |
for (i = 0; i < 3; i++) { |
| 178 |
+ |
rorg[i] += rdir[i]*zval; |
| 179 |
+ |
rdir[i] = -rdir[i]; |
| 180 |
+ |
} |
| 181 |
+ |
else if (d > FTINY) { |
| 182 |
+ |
rdir[0] *= d; rdir[1] *= d; rdir[2] *= d; |
| 183 |
+ |
} |
| 184 |
+ |
(*putr)(rorg, rdir); |
| 185 |
+ |
} |
| 186 |
+ |
if (!feof(fp)) { |
| 187 |
+ |
fprintf(stderr, "%s: expected px py on input\n", progname); |
| 188 |
+ |
exit(1); |
| 189 |
+ |
} |
| 190 |
+ |
} |
| 191 |
+ |
|
| 192 |
+ |
|
| 193 |
|
putrays() |
| 194 |
|
{ |
| 195 |
< |
static FLOAT loc[2]; |
| 195 |
> |
static RREAL loc[2]; |
| 196 |
|
static FVECT rorg, rdir; |
| 197 |
|
float *zbuf; |
| 198 |
|
int sc; |
| 233 |
|
} |
| 234 |
|
} |
| 235 |
|
if (zfd >= 0) |
| 236 |
< |
free((char *)zbuf); |
| 236 |
> |
free((void *)zbuf); |
| 237 |
|
} |
| 238 |
|
|
| 239 |
|
|
