| 1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
|
| 3 |
|
#ifndef lint |
| 4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 18 |
|
#else |
| 19 |
|
#include <signal.h> |
| 20 |
|
#endif |
| 21 |
+ |
#include <fcntl.h> |
| 22 |
|
|
| 23 |
|
#include "view.h" |
| 24 |
|
|
| 25 |
|
#include "random.h" |
| 26 |
|
|
| 27 |
+ |
int dimlist[MAXDIM]; /* sampling dimensions */ |
| 28 |
+ |
int ndims = 0; /* number of sampling dimensions */ |
| 29 |
+ |
int samplendx; /* sample index number */ |
| 30 |
+ |
|
| 31 |
|
VIEW ourview = STDVIEW; /* view parameters */ |
| 32 |
|
int hresolu = 512; /* horizontal resolution */ |
| 33 |
|
int vresolu = 512; /* vertical resolution */ |
| 40 |
|
double dstrsrc = 0.0; /* square source distribution */ |
| 41 |
|
double shadthresh = .05; /* shadow threshold */ |
| 42 |
|
double shadcert = .5; /* shadow certainty */ |
| 43 |
+ |
int directrelay = 0; /* number of source relays */ |
| 44 |
|
|
| 45 |
|
int maxdepth = 6; /* maximum recursion depth */ |
| 46 |
|
double minweight = 5e-3; /* minimum ray weight */ |
| 58 |
|
|
| 59 |
|
double pctdone = 0.0; /* percentage done */ |
| 60 |
|
|
| 61 |
+ |
long tlastrept = 0L; /* time at last report */ |
| 62 |
+ |
|
| 63 |
+ |
extern long time(); |
| 64 |
+ |
extern long tstart; /* starting time */ |
| 65 |
+ |
|
| 66 |
|
extern long nrays; /* number of rays traced */ |
| 67 |
|
|
| 68 |
< |
#define MAXDIV 32 /* maximum sample size */ |
| 68 |
> |
#define MAXDIV 15 /* maximum sample size */ |
| 69 |
|
|
| 70 |
|
#define pixjitter() (.5+dstrpix*(.5-frandom())) |
| 71 |
|
|
| 82 |
|
} |
| 83 |
|
|
| 84 |
|
|
| 85 |
+ |
#ifdef BSD |
| 86 |
|
report() /* report progress */ |
| 87 |
|
{ |
| 76 |
– |
#ifdef BSD |
| 88 |
|
struct rusage rubuf; |
| 89 |
|
double t; |
| 90 |
|
|
| 97 |
|
|
| 98 |
|
sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f CPU hours\n", |
| 99 |
|
nrays, pctdone, t/3600.0); |
| 100 |
+ |
eputs(errmsg); |
| 101 |
+ |
tlastrept = time((long *)0); |
| 102 |
+ |
} |
| 103 |
|
#else |
| 104 |
+ |
report() /* report progress */ |
| 105 |
+ |
{ |
| 106 |
|
signal(SIGALRM, report); |
| 107 |
< |
sprintf(errmsg, "%ld rays, %4.2f%% done\n", nrays, pctdone); |
| 108 |
< |
#endif |
| 107 |
> |
tlastrept = time((long *)0); |
| 108 |
> |
sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f hours\n", |
| 109 |
> |
nrays, pctdone, (tlastrept-tstart)/3600.0); |
| 110 |
|
eputs(errmsg); |
| 94 |
– |
|
| 95 |
– |
if (ralrm > 0) |
| 96 |
– |
alarm(ralrm); |
| 111 |
|
} |
| 112 |
+ |
#endif |
| 113 |
|
|
| 114 |
|
|
| 115 |
|
render(zfile, oldfile) /* render the scene */ |
| 116 |
|
char *zfile, *oldfile; |
| 117 |
|
{ |
| 118 |
+ |
extern long lseek(); |
| 119 |
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
| 120 |
|
float *zbar[MAXDIV+1]; /* z values */ |
| 121 |
|
int ypos; /* current scanline */ |
| 122 |
|
int ystep; /* current y step size */ |
| 123 |
< |
FILE *zfp; |
| 123 |
> |
int zfd; |
| 124 |
|
COLOR *colptr; |
| 125 |
|
float *zptr; |
| 126 |
|
register int i; |
| 127 |
|
/* check sampling */ |
| 128 |
|
if (psample < 1) |
| 129 |
|
psample = 1; |
| 130 |
< |
else if (psample > MAXDIV) |
| 130 |
> |
else if (psample > MAXDIV) { |
| 131 |
> |
sprintf(errmsg, "pixel sampling reduced from %d to %d", |
| 132 |
> |
psample, MAXDIV); |
| 133 |
> |
error(WARNING, errmsg); |
| 134 |
|
psample = MAXDIV; |
| 135 |
+ |
} |
| 136 |
|
/* allocate scanlines */ |
| 137 |
|
for (i = 0; i <= psample; i++) { |
| 138 |
|
scanbar[i] = (COLOR *)malloc(hresolu*sizeof(COLOR)); |
| 141 |
|
} |
| 142 |
|
/* open z file */ |
| 143 |
|
if (zfile != NULL) { |
| 144 |
< |
if ((zfp = fopen(zfile, "a+")) == NULL) { |
| 144 |
> |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
| 145 |
|
sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
| 146 |
|
error(SYSTEM, errmsg); |
| 147 |
|
} |
| 151 |
|
goto memerr; |
| 152 |
|
} |
| 153 |
|
} else { |
| 154 |
< |
zfp = NULL; |
| 154 |
> |
zfd = -1; |
| 155 |
|
for (i = 0; i <= psample; i++) |
| 156 |
|
zbar[i] = NULL; |
| 157 |
|
} |
| 159 |
|
fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
| 160 |
|
/* recover file and compute first */ |
| 161 |
|
i = salvage(oldfile); |
| 162 |
< |
if (zfp != NULL && fseek(zfp, (long)i*hresolu*sizeof(float), 0) == EOF) |
| 162 |
> |
if (zfd != -1 && i > 0 && |
| 163 |
> |
lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
| 164 |
|
error(SYSTEM, "z file seek error in render"); |
| 165 |
+ |
pctdone = 100.0*i/vresolu; |
| 166 |
+ |
if (ralrm > 0) /* report init stats */ |
| 167 |
+ |
report(); |
| 168 |
|
ypos = vresolu-1 - i; |
| 169 |
|
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
| 170 |
|
ystep = psample; |
| 171 |
|
/* compute scanlines */ |
| 172 |
|
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
| 149 |
– |
/* record progress */ |
| 150 |
– |
pctdone = 100.0*(vresolu-ypos-ystep)/vresolu; |
| 173 |
|
/* bottom adjust? */ |
| 174 |
|
if (ypos < 0) { |
| 175 |
|
ystep += ypos; |
| 187 |
|
fillscanbar(scanbar, zbar, hresolu, ypos, ystep); |
| 188 |
|
/* write it out */ |
| 189 |
|
for (i = ystep; i > 0; i--) { |
| 190 |
< |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 190 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
| 191 |
> |
hresolu*sizeof(float)) |
| 192 |
> |
< hresolu*sizeof(float)) |
| 193 |
|
goto writerr; |
| 194 |
< |
if (fwritescan(scanbar[i],hresolu,stdout) < 0) |
| 194 |
> |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
| 195 |
|
goto writerr; |
| 196 |
|
} |
| 173 |
– |
if (zfp != NULL && fflush(zfp) == EOF) |
| 174 |
– |
goto writerr; |
| 197 |
|
if (fflush(stdout) == EOF) |
| 198 |
|
goto writerr; |
| 199 |
+ |
/* record progress */ |
| 200 |
+ |
pctdone = 100.0*(vresolu-1-ypos)/vresolu; |
| 201 |
+ |
if (ralrm > 0 && time((long *)0) >= tlastrept+ralrm) |
| 202 |
+ |
report(); |
| 203 |
|
} |
| 204 |
|
/* clean up */ |
| 205 |
< |
if (zfp != NULL) { |
| 206 |
< |
fwrite(zbar[0], sizeof(float), hresolu, zfp); |
| 207 |
< |
if (fclose(zfp) == EOF) |
| 205 |
> |
if (zfd != -1) { |
| 206 |
> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
| 207 |
> |
< hresolu*sizeof(float)) |
| 208 |
|
goto writerr; |
| 209 |
+ |
if (close(zfd) == -1) |
| 210 |
+ |
goto writerr; |
| 211 |
|
for (i = 0; i <= psample; i++) |
| 212 |
|
free((char *)zbar[i]); |
| 213 |
|
} |
| 259 |
|
COLOR vline[MAXDIV+1]; |
| 260 |
|
float zline[MAXDIV+1]; |
| 261 |
|
int b = ysize; |
| 234 |
– |
double z; |
| 262 |
|
register int i, j; |
| 263 |
|
|
| 264 |
|
for (i = 0; i < xres; i++) { |
| 342 |
|
COLOR col; /* returned color */ |
| 343 |
|
int x, y; /* pixel position */ |
| 344 |
|
{ |
| 345 |
< |
static RAY thisray; /* our ray for this pixel */ |
| 345 |
> |
static RAY thisray; |
| 346 |
|
|
| 347 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, |
| 348 |
< |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu); |
| 347 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
| 348 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu) < 0) { |
| 349 |
> |
setcolor(col, 0.0, 0.0, 0.0); |
| 350 |
> |
return(0.0); |
| 351 |
> |
} |
| 352 |
|
|
| 353 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 354 |
< |
|
| 354 |
> |
|
| 355 |
> |
samplendx = 3*y + x; /* set pixel index */ |
| 356 |
> |
|
| 357 |
|
rayvalue(&thisray); /* trace ray */ |
| 358 |
|
|
| 359 |
|
copycolor(col, thisray.rcol); /* return color */ |
| 360 |
|
|
| 361 |
< |
return(thisray.rot); /* return distance */ |
| 361 |
> |
return(thisray.rt); /* return distance */ |
| 362 |
|
} |
| 363 |
|
|
| 364 |
|
|
