15 |
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#ifdef BSD |
16 |
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#include <sys/time.h> |
17 |
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#include <sys/resource.h> |
18 |
+ |
#else |
19 |
+ |
#include <signal.h> |
20 |
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#endif |
21 |
+ |
#include <fcntl.h> |
22 |
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|
23 |
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#include "view.h" |
24 |
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|
25 |
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#include "random.h" |
26 |
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|
27 |
< |
VIEW ourview = STDVIEW(512); /* view parameters */ |
27 |
> |
VIEW ourview = STDVIEW; /* view parameters */ |
28 |
> |
int hresolu = 512; /* horizontal resolution */ |
29 |
> |
int vresolu = 512; /* vertical resolution */ |
30 |
> |
double pixaspect = 1.0; /* pixel aspect ratio */ |
31 |
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|
32 |
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int psample = 4; /* pixel sample size */ |
33 |
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double maxdiff = .05; /* max. difference for interpolation */ |
59 |
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|
60 |
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
61 |
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|
62 |
+ |
double pixvalue(); |
63 |
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|
64 |
+ |
|
65 |
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quit(code) /* quit program */ |
66 |
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int code; |
67 |
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{ |
88 |
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sprintf(errmsg, "%ld rays, %4.2f%% done after %5.4f CPU hours\n", |
89 |
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nrays, pctdone, t/3600.0); |
90 |
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#else |
91 |
+ |
signal(SIGALRM, report); |
92 |
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sprintf(errmsg, "%ld rays, %4.2f%% done\n", nrays, pctdone); |
93 |
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#endif |
94 |
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eputs(errmsg); |
98 |
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} |
99 |
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|
100 |
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|
101 |
< |
render(oldfile) /* render the scene */ |
102 |
< |
char *oldfile; |
101 |
> |
render(zfile, oldfile) /* render the scene */ |
102 |
> |
char *zfile, *oldfile; |
103 |
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{ |
104 |
+ |
extern long lseek(); |
105 |
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COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
106 |
+ |
float *zbar[MAXDIV+1]; /* z values */ |
107 |
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int ypos; /* current scanline */ |
108 |
+ |
int ystep; /* current y step size */ |
109 |
+ |
int zfd; |
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COLOR *colptr; |
111 |
+ |
float *zptr; |
112 |
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register int i; |
113 |
< |
|
113 |
> |
/* check sampling */ |
114 |
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if (psample < 1) |
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psample = 1; |
116 |
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else if (psample > MAXDIV) |
117 |
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psample = MAXDIV; |
118 |
< |
|
105 |
< |
ourview.hresolu -= ourview.hresolu % psample; |
106 |
< |
ourview.vresolu -= ourview.vresolu % psample; |
107 |
< |
|
118 |
> |
/* allocate scanlines */ |
119 |
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for (i = 0; i <= psample; i++) { |
120 |
< |
scanbar[i] = (COLOR *)malloc((ourview.hresolu+1)*sizeof(COLOR)); |
120 |
> |
scanbar[i] = (COLOR *)malloc(hresolu*sizeof(COLOR)); |
121 |
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if (scanbar[i] == NULL) |
122 |
< |
error(SYSTEM, "out of memory in render"); |
122 |
> |
goto memerr; |
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|
} |
124 |
< |
|
124 |
> |
/* open z file */ |
125 |
> |
if (zfile != NULL) { |
126 |
> |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
127 |
> |
sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
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> |
error(SYSTEM, errmsg); |
129 |
> |
} |
130 |
> |
for (i = 0; i <= psample; i++) { |
131 |
> |
zbar[i] = (float *)malloc(hresolu*sizeof(float)); |
132 |
> |
if (zbar[i] == NULL) |
133 |
> |
goto memerr; |
134 |
> |
} |
135 |
> |
} else { |
136 |
> |
zfd = -1; |
137 |
> |
for (i = 0; i <= psample; i++) |
138 |
> |
zbar[i] = NULL; |
139 |
> |
} |
140 |
|
/* write out boundaries */ |
141 |
< |
fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout); |
142 |
< |
|
143 |
< |
ypos = ourview.vresolu - salvage(oldfile); /* find top line */ |
144 |
< |
fillscanline(scanbar[0], ypos, psample); /* top scan */ |
145 |
< |
|
146 |
< |
for (ypos -= psample; ypos > -psample; ypos -= psample) { |
147 |
< |
|
148 |
< |
colptr = scanbar[psample]; /* get last scanline */ |
149 |
< |
scanbar[psample] = scanbar[0]; |
141 |
> |
fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
142 |
> |
/* recover file and compute first */ |
143 |
> |
i = salvage(oldfile); |
144 |
> |
if (zfd != -1 && lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
145 |
> |
error(SYSTEM, "z file seek error in render"); |
146 |
> |
ypos = vresolu-1 - i; |
147 |
> |
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
148 |
> |
ystep = psample; |
149 |
> |
/* compute scanlines */ |
150 |
> |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
151 |
> |
/* record progress */ |
152 |
> |
pctdone = 100.0*(vresolu-1-ypos-ystep)/vresolu; |
153 |
> |
/* bottom adjust? */ |
154 |
> |
if (ypos < 0) { |
155 |
> |
ystep += ypos; |
156 |
> |
ypos = 0; |
157 |
> |
} |
158 |
> |
colptr = scanbar[ystep]; /* move base to top */ |
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> |
scanbar[ystep] = scanbar[0]; |
160 |
|
scanbar[0] = colptr; |
161 |
< |
|
162 |
< |
fillscanline(scanbar[0], ypos, psample); /* base scan */ |
163 |
< |
|
164 |
< |
fillscanbar(scanbar, ypos, psample); |
165 |
< |
|
166 |
< |
for (i = psample-1; i >= 0; i--) |
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< |
if (fwritescan(scanbar[i], ourview.hresolu, stdout) < 0) |
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> |
zptr = zbar[ystep]; |
162 |
> |
zbar[ystep] = zbar[0]; |
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> |
zbar[0] = zptr; |
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> |
/* fill base line */ |
165 |
> |
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
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> |
/* fill bar */ |
167 |
> |
fillscanbar(scanbar, zbar, hresolu, ypos, ystep); |
168 |
> |
/* write it out */ |
169 |
> |
for (i = ystep; i > 0; i--) { |
170 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
171 |
> |
hresolu*sizeof(float)) |
172 |
> |
< hresolu*sizeof(float)) |
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goto writerr; |
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+ |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
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+ |
goto writerr; |
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+ |
} |
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if (fflush(stdout) == EOF) |
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goto writerr; |
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pctdone = 100.0*(ourview.vresolu-ypos)/ourview.vresolu; |
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} |
180 |
< |
|
180 |
> |
/* clean up */ |
181 |
> |
if (zfd != -1) { |
182 |
> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
183 |
> |
< hresolu*sizeof(float)) |
184 |
> |
goto writerr; |
185 |
> |
if (close(zfd) == -1) |
186 |
> |
goto writerr; |
187 |
> |
for (i = 0; i <= psample; i++) |
188 |
> |
free((char *)zbar[i]); |
189 |
> |
} |
190 |
> |
fwritescan(scanbar[0], hresolu, stdout); |
191 |
> |
if (fflush(stdout) == EOF) |
192 |
> |
goto writerr; |
193 |
|
for (i = 0; i <= psample; i++) |
194 |
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free((char *)scanbar[i]); |
195 |
+ |
pctdone = 100.0; |
196 |
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return; |
197 |
|
writerr: |
198 |
|
error(SYSTEM, "write error in render"); |
199 |
+ |
memerr: |
200 |
+ |
error(SYSTEM, "out of memory in render"); |
201 |
|
} |
202 |
|
|
203 |
|
|
204 |
< |
fillscanline(scanline, y, xstep) /* fill scan line at y */ |
204 |
> |
fillscanline(scanline, zline, xres, y, xstep) /* fill scan line at y */ |
205 |
|
register COLOR *scanline; |
206 |
< |
int y, xstep; |
206 |
> |
register float *zline; |
207 |
> |
int xres, y, xstep; |
208 |
|
{ |
209 |
|
int b = xstep; |
210 |
+ |
double z; |
211 |
|
register int i; |
212 |
|
|
213 |
< |
pixvalue(scanline[0], 0, y); |
213 |
> |
z = pixvalue(scanline[0], 0, y); |
214 |
> |
if (zline) zline[0] = z; |
215 |
|
|
216 |
< |
for (i = xstep; i <= ourview.hresolu; i += xstep) { |
217 |
< |
|
218 |
< |
pixvalue(scanline[i], i, y); |
216 |
> |
for (i = xstep; i < xres-1+xstep; i += xstep) { |
217 |
> |
if (i >= xres) { |
218 |
> |
xstep += xres-1-i; |
219 |
> |
i = xres-1; |
220 |
> |
} |
221 |
> |
z = pixvalue(scanline[i], i, y); |
222 |
> |
if (zline) zline[i] = z; |
223 |
|
|
224 |
< |
b = fillsample(scanline+i-xstep, i-xstep, y, xstep, 0, b/2); |
224 |
> |
b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
225 |
> |
i-xstep, y, xstep, 0, b/2); |
226 |
|
} |
227 |
|
} |
228 |
|
|
229 |
|
|
230 |
< |
fillscanbar(scanbar, y, ysize) /* fill interior */ |
230 |
> |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
231 |
|
register COLOR *scanbar[]; |
232 |
< |
int y, ysize; |
232 |
> |
register float *zbar[]; |
233 |
> |
int xres, y, ysize; |
234 |
|
{ |
235 |
|
COLOR vline[MAXDIV+1]; |
236 |
+ |
float zline[MAXDIV+1]; |
237 |
|
int b = ysize; |
238 |
|
register int i, j; |
239 |
|
|
240 |
< |
for (i = 0; i < ourview.hresolu; i++) { |
240 |
> |
for (i = 0; i < xres; i++) { |
241 |
|
|
242 |
|
copycolor(vline[0], scanbar[0][i]); |
243 |
|
copycolor(vline[ysize], scanbar[ysize][i]); |
244 |
+ |
if (zbar[0]) { |
245 |
+ |
zline[0] = zbar[0][i]; |
246 |
+ |
zline[ysize] = zbar[ysize][i]; |
247 |
+ |
} |
248 |
|
|
249 |
< |
b = fillsample(vline, i, y, 0, ysize, b/2); |
249 |
> |
b = fillsample(vline, zbar[0] ? zline : NULL, |
250 |
> |
i, y, 0, ysize, b/2); |
251 |
|
|
252 |
|
for (j = 1; j < ysize; j++) |
253 |
|
copycolor(scanbar[j][i], vline[j]); |
254 |
+ |
if (zbar[0]) |
255 |
+ |
for (j = 1; j < ysize; j++) |
256 |
+ |
zbar[j][i] = zline[j]; |
257 |
|
} |
258 |
|
} |
259 |
|
|
260 |
|
|
261 |
|
int |
262 |
< |
fillsample(colline, x, y, xlen, ylen, b) /* fill interior points */ |
262 |
> |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
263 |
|
register COLOR *colline; |
264 |
+ |
register float *zline; |
265 |
|
int x, y; |
266 |
|
int xlen, ylen; |
267 |
|
int b; |
268 |
|
{ |
269 |
+ |
extern double fabs(); |
270 |
|
double ratio; |
271 |
+ |
double z; |
272 |
|
COLOR ctmp; |
273 |
|
int ncut; |
274 |
|
register int len; |
281 |
|
if (len <= 1) /* limit recursion */ |
282 |
|
return(0); |
283 |
|
|
284 |
< |
if (b > 0 || bigdiff(colline[0], colline[len], maxdiff)) { |
284 |
> |
if (b > 0 |
285 |
> |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
286 |
> |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
287 |
|
|
288 |
< |
pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
288 |
> |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
289 |
> |
if (zline) zline[len>>1] = z; |
290 |
|
ncut = 1; |
291 |
|
|
292 |
|
} else { /* interpolate */ |
294 |
|
copycolor(colline[len>>1], colline[len]); |
295 |
|
ratio = (double)(len>>1) / len; |
296 |
|
scalecolor(colline[len>>1], ratio); |
297 |
< |
copycolor(ctmp, colline[0]); |
297 |
> |
if (zline) zline[len>>1] = zline[len] * ratio; |
298 |
|
ratio = 1.0 - ratio; |
299 |
+ |
copycolor(ctmp, colline[0]); |
300 |
|
scalecolor(ctmp, ratio); |
301 |
|
addcolor(colline[len>>1], ctmp); |
302 |
+ |
if (zline) zline[len>>1] += zline[0] * ratio; |
303 |
|
ncut = 0; |
304 |
|
} |
305 |
|
/* recurse */ |
306 |
< |
ncut += fillsample(colline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
306 |
> |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
307 |
|
|
308 |
< |
ncut += fillsample(colline + (len>>1), x + (xlen>>1), y + (ylen>>1), |
309 |
< |
xlen - (xlen>>1), ylen - (ylen>>1), b/2); |
308 |
> |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
309 |
> |
x+(xlen>>1), y+(ylen>>1), |
310 |
> |
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
311 |
|
|
312 |
|
return(ncut); |
313 |
|
} |
314 |
|
|
315 |
|
|
316 |
+ |
double |
317 |
|
pixvalue(col, x, y) /* compute pixel value */ |
318 |
|
COLOR col; /* returned color */ |
319 |
|
int x, y; /* pixel position */ |
320 |
|
{ |
321 |
|
static RAY thisray; /* our ray for this pixel */ |
322 |
|
|
323 |
< |
rayview(thisray.rorg, thisray.rdir, &ourview, |
324 |
< |
x + pixjitter(), y + pixjitter()); |
323 |
> |
viewray(thisray.rorg, thisray.rdir, &ourview, |
324 |
> |
(x+pixjitter())/hresolu, (y+pixjitter())/vresolu); |
325 |
|
|
326 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
327 |
|
|
328 |
|
rayvalue(&thisray); /* trace ray */ |
329 |
|
|
330 |
|
copycolor(col, thisray.rcol); /* return color */ |
331 |
+ |
|
332 |
+ |
return(thisray.rt); /* return distance */ |
333 |
|
} |
334 |
|
|
335 |
|
|
343 |
|
|
344 |
|
if (oldfile == NULL) |
345 |
|
return(0); |
346 |
< |
else if ((fp = fopen(oldfile, "r")) == NULL) { |
346 |
> |
|
347 |
> |
if ((fp = fopen(oldfile, "r")) == NULL) { |
348 |
|
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
349 |
|
error(WARNING, errmsg); |
350 |
|
return(0); |
359 |
|
return(0); |
360 |
|
} |
361 |
|
|
362 |
< |
if (x != ourview.hresolu || y != ourview.vresolu) { |
362 |
> |
if (x != hresolu || y != vresolu) { |
363 |
|
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
364 |
|
oldfile); |
365 |
|
error(USER, errmsg); |
277 |
– |
return(0); |
366 |
|
} |
367 |
|
|
368 |
< |
scanline = (COLR *)malloc(ourview.hresolu*sizeof(COLR)); |
368 |
> |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
369 |
|
if (scanline == NULL) |
370 |
|
error(SYSTEM, "out of memory in salvage"); |
371 |
< |
for (y = 0; y < ourview.vresolu; y++) { |
372 |
< |
if (freadcolrs(scanline, ourview.hresolu, fp) < 0) |
371 |
> |
for (y = 0; y < vresolu; y++) { |
372 |
> |
if (freadcolrs(scanline, hresolu, fp) < 0) |
373 |
|
break; |
374 |
< |
if (fwritecolrs(scanline, ourview.hresolu, stdout) < 0) |
374 |
> |
if (fwritecolrs(scanline, hresolu, stdout) < 0) |
375 |
|
goto writerr; |
376 |
|
} |
377 |
|
if (fflush(stdout) == EOF) |