15 |
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#include "ray.h" |
16 |
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#include "rpaint.h" |
17 |
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|
18 |
– |
|
19 |
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CUBE thescene; /* our scene */ |
20 |
– |
OBJECT nsceneobjs; /* number of objects in our scene */ |
21 |
– |
|
22 |
– |
int dimlist[MAXDIM]; /* sampling dimensions */ |
23 |
– |
int ndims = 0; /* number of sampling dimensions */ |
24 |
– |
int samplendx = 0; /* index for this sample */ |
25 |
– |
|
26 |
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extern void ambnotify(); |
27 |
– |
void (*addobjnotify[])() = {ambnotify, NULL}; |
28 |
– |
|
29 |
– |
VIEW ourview = STDVIEW; /* viewing parameters */ |
30 |
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int hresolu, vresolu; /* image resolution */ |
31 |
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|
32 |
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void (*trace)() = NULL; /* trace call */ |
33 |
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|
34 |
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int do_irrad = 0; /* compute irradiance? */ |
35 |
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|
36 |
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int rand_samp = 0; /* pure Monte Carlo sampling? */ |
37 |
– |
|
38 |
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int psample = 8; /* pixel sample size */ |
39 |
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double maxdiff = .15; /* max. sample difference */ |
40 |
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|
41 |
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double exposure = 1.0; /* exposure for scene */ |
42 |
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|
43 |
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double dstrsrc = 0.0; /* square source distribution */ |
44 |
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double shadthresh = .1; /* shadow threshold */ |
45 |
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double shadcert = .25; /* shadow certainty */ |
46 |
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int directrelay = 0; /* number of source relays */ |
47 |
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int vspretest = 128; /* virtual source pretest density */ |
48 |
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int directvis = 1; /* sources visible? */ |
49 |
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double srcsizerat = 0.; /* maximum ratio source size/dist. */ |
50 |
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|
51 |
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
52 |
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COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
53 |
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double seccg = 0.; /* global scattering eccentricity */ |
54 |
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double ssampdist = 0.; /* scatter sampling distance */ |
55 |
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|
56 |
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double specthresh = .3; /* specular sampling threshold */ |
57 |
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double specjitter = 1.; /* specular sampling jitter */ |
58 |
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|
59 |
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int backvis = 1; /* back face visibility */ |
60 |
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|
61 |
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int maxdepth = 6; /* maximum recursion depth */ |
62 |
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double minweight = 1e-2; /* minimum ray weight */ |
63 |
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|
64 |
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char *ambfile = NULL; /* ambient file name */ |
65 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
66 |
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int ambvwt = 0; /* initial weight for ambient value */ |
67 |
– |
double ambacc = 0.3; /* ambient accuracy */ |
68 |
– |
int ambres = 32; /* ambient resolution */ |
69 |
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int ambdiv = 256; /* ambient divisions */ |
70 |
– |
int ambssamp = 64; /* ambient super-samples */ |
71 |
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int ambounce = 0; /* ambient bounces */ |
72 |
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char *amblist[AMBLLEN]; /* ambient include/exclude list */ |
73 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
74 |
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|
75 |
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int greyscale = 0; /* map colors to brightness? */ |
76 |
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char *dvcname = dev_default; /* output device name */ |
77 |
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|
78 |
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struct driver *dev = NULL; /* driver functions */ |
79 |
– |
|
80 |
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char rifname[128]; /* rad input file name */ |
81 |
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|
82 |
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VIEW oldview; /* previous view parameters */ |
83 |
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|
84 |
– |
PNODE ptrunk; /* the base of our image */ |
85 |
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RECT pframe; /* current frame boundaries */ |
86 |
– |
int pdepth; /* image depth in current frame */ |
87 |
– |
|
88 |
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static char *reserve_mem = NULL; /* pre-allocated reserve memory */ |
89 |
– |
|
90 |
– |
#define RESERVE_AMT 32768 /* amount of memory to reserve */ |
91 |
– |
|
18 |
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#define CTRL(c) ((c)-'@') |
19 |
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|
20 |
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|
21 |
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void |
22 |
< |
quit(code) /* quit program */ |
23 |
< |
int code; |
22 |
> |
devopen( /* open device driver */ |
23 |
> |
char *dname |
24 |
> |
) |
25 |
|
{ |
99 |
– |
#ifdef MSTATS |
100 |
– |
if (code == 2 && errno == ENOMEM) |
101 |
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printmemstats(stderr); |
102 |
– |
#endif |
103 |
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devclose(); |
104 |
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exit(code); |
105 |
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} |
106 |
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|
107 |
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|
108 |
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void |
109 |
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devopen(dname) /* open device driver */ |
110 |
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char *dname; |
111 |
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{ |
26 |
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extern char *progname, *octname; |
27 |
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char *id; |
28 |
< |
register int i; |
28 |
> |
int i; |
29 |
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|
30 |
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id = octname!=NULL ? octname : progname; |
31 |
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/* check device table */ |
46 |
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|
47 |
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|
48 |
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void |
49 |
< |
devclose() /* close our device */ |
49 |
> |
devclose(void) /* close our device */ |
50 |
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{ |
51 |
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if (dev != NULL) |
52 |
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(*dev->close)(); |
55 |
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|
56 |
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|
57 |
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void |
58 |
< |
printdevices() /* print list of output devices */ |
58 |
> |
printdevices(void) /* print list of output devices */ |
59 |
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{ |
60 |
< |
register int i; |
60 |
> |
int i; |
61 |
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|
62 |
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for (i = 0; devtable[i].name; i++) |
63 |
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printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip); |
65 |
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|
66 |
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|
67 |
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void |
68 |
< |
rview() /* do a view */ |
68 |
> |
rview(void) /* do a view */ |
69 |
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{ |
70 |
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char buf[32]; |
71 |
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|
72 |
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devopen(dvcname); /* open device */ |
73 |
< |
newimage(); /* start image (calls fillreserves) */ |
73 |
> |
newimage(NULL); /* start image */ |
74 |
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|
75 |
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for ( ; ; ) { /* quit in command() */ |
76 |
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while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth) |
77 |
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command("done: "); |
164 |
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while (reserve_mem == NULL) |
165 |
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command("out of memory: "); |
78 |
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errno = 0; |
79 |
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if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) { |
80 |
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sprintf(buf, "%d sampling...\n", 1<<pdepth); |
83 |
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} else { |
84 |
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sprintf(buf, "%d refining...\n", 1<<pdepth); |
85 |
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(*dev->comout)(buf); |
86 |
< |
refine(&ptrunk, 0, 0, hresolu, vresolu, pdepth+1); |
86 |
> |
refine(&ptrunk, pdepth+1); |
87 |
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} |
88 |
< |
if (errno == ENOMEM) /* ran out of memory */ |
89 |
< |
freereserves(); |
90 |
< |
else if (dev->inpready) /* noticed some input */ |
88 |
> |
if (waitrays() < 0) |
89 |
> |
quit(1); |
90 |
> |
if (dev->inpready) /* noticed some input */ |
91 |
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command(": "); |
92 |
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else /* finished this depth */ |
93 |
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pdepth++; |
96 |
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|
97 |
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|
98 |
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void |
99 |
< |
fillreserves() /* fill memory reserves */ |
99 |
> |
command( /* get/execute command */ |
100 |
> |
char *prompt |
101 |
> |
) |
102 |
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{ |
189 |
– |
if (reserve_mem != NULL) |
190 |
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return; |
191 |
– |
reserve_mem = (char *)malloc(RESERVE_AMT); |
192 |
– |
} |
193 |
– |
|
194 |
– |
|
195 |
– |
void |
196 |
– |
freereserves() /* free memory reserves */ |
197 |
– |
{ |
198 |
– |
if (reserve_mem == NULL) |
199 |
– |
return; |
200 |
– |
free(reserve_mem); |
201 |
– |
reserve_mem = NULL; |
202 |
– |
} |
203 |
– |
|
204 |
– |
|
205 |
– |
void |
206 |
– |
command(prompt) /* get/execute command */ |
207 |
– |
char *prompt; |
208 |
– |
{ |
103 |
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#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1) |
104 |
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char inpbuf[256]; |
105 |
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char *args; |
162 |
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case 'n': /* new picture */ |
163 |
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if (badcom("new")) |
164 |
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goto commerr; |
165 |
< |
newimage(); |
165 |
> |
newimage(args); |
166 |
|
break; |
167 |
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case 't': /* trace a ray */ |
168 |
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if (badcom("trace")) |
250 |
|
|
251 |
|
|
252 |
|
void |
253 |
< |
rsample() /* sample the image */ |
253 |
> |
rsample(void) /* sample the image */ |
254 |
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{ |
255 |
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int xsiz, ysiz, y; |
362 |
– |
RECT r; |
256 |
|
PNODE *p; |
257 |
< |
register RECT *rl; |
258 |
< |
register PNODE **pl; |
366 |
< |
register int x; |
257 |
> |
PNODE **pl; |
258 |
> |
int x; |
259 |
|
/* |
260 |
|
* We initialize the bottom row in the image at our current |
261 |
|
* resolution. During sampling, we check super-pixels to the |
265 |
|
*/ |
266 |
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xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
267 |
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ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
376 |
– |
rl = (RECT *)malloc(xsiz*sizeof(RECT)); |
377 |
– |
if (rl == NULL) |
378 |
– |
return; |
268 |
|
pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
269 |
< |
if (pl == NULL) { |
381 |
< |
free((void *)rl); |
269 |
> |
if (pl == NULL) |
270 |
|
return; |
383 |
– |
} |
271 |
|
/* |
272 |
|
* Initialize the bottom row. |
273 |
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*/ |
274 |
< |
rl[0].l = rl[0].d = 0; |
388 |
< |
rl[0].r = hresolu; rl[0].u = vresolu; |
389 |
< |
pl[0] = findrect(pframe.l, pframe.d, &ptrunk, rl, pdepth); |
274 |
> |
pl[0] = findrect(pframe.l, pframe.d, &ptrunk, pdepth); |
275 |
|
for (x = 1; x < xsiz; x++) { |
391 |
– |
rl[x].l = rl[x].d = 0; |
392 |
– |
rl[x].r = hresolu; rl[x].u = vresolu; |
276 |
|
pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth), |
277 |
< |
pframe.d, &ptrunk, rl+x, pdepth); |
277 |
> |
pframe.d, &ptrunk, pdepth); |
278 |
|
} |
279 |
|
/* sample the image */ |
280 |
|
for (y = 0; /* y < ysiz */ ; y++) { |
286 |
|
*/ |
287 |
|
if (pl[x] != pl[x+1] && bigdiff(pl[x]->v, |
288 |
|
pl[x+1]->v, maxdiff)) { |
289 |
< |
refine(pl[x], rl[x].l, rl[x].d, |
290 |
< |
rl[x].r, rl[x].u, 1); |
408 |
< |
refine(pl[x+1], rl[x+1].l, rl[x+1].d, |
409 |
< |
rl[x+1].r, rl[x+1].u, 1); |
289 |
> |
refine(pl[x], 1); |
290 |
> |
refine(pl[x+1], 1); |
291 |
|
} |
292 |
|
} |
293 |
|
if (y >= ysiz-1) |
298 |
|
/* |
299 |
|
* Find super-pixel at this position in next row. |
300 |
|
*/ |
420 |
– |
r.l = r.d = 0; |
421 |
– |
r.r = hresolu; r.u = vresolu; |
301 |
|
p = findrect(pframe.l+((x*hresolu)>>pdepth), |
302 |
|
pframe.d+(((y+1)*vresolu)>>pdepth), |
303 |
< |
&ptrunk, &r, pdepth); |
303 |
> |
&ptrunk, pdepth); |
304 |
|
/* |
305 |
|
* Test super-pixel in next row. |
306 |
|
*/ |
307 |
|
if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) { |
308 |
< |
refine(pl[x], rl[x].l, rl[x].d, |
309 |
< |
rl[x].r, rl[x].u, 1); |
431 |
< |
refine(p, r.l, r.d, r.r, r.u, 1); |
308 |
> |
refine(pl[x], 1); |
309 |
> |
refine(p, 1); |
310 |
|
} |
311 |
|
/* |
312 |
|
* Copy into super-pixel array. |
313 |
|
*/ |
436 |
– |
rl[x].l = r.l; rl[x].d = r.d; |
437 |
– |
rl[x].r = r.r; rl[x].u = r.u; |
314 |
|
pl[x] = p; |
315 |
|
} |
316 |
|
} |
317 |
|
escape: |
442 |
– |
free((void *)rl); |
318 |
|
free((void *)pl); |
319 |
|
} |
320 |
|
|
321 |
|
|
322 |
|
int |
323 |
< |
refine(p, xmin, ymin, xmax, ymax, pd) /* refine a node */ |
324 |
< |
register PNODE *p; |
325 |
< |
int xmin, ymin, xmax, ymax; |
326 |
< |
int pd; |
323 |
> |
refine( /* refine a node */ |
324 |
> |
PNODE *p, |
325 |
> |
int pd |
326 |
> |
) |
327 |
|
{ |
328 |
|
int growth; |
329 |
|
int mx, my; |
335 |
|
if (pd <= 0) /* depth limit */ |
336 |
|
return(0); |
337 |
|
|
338 |
< |
mx = (xmin + xmax) >> 1; |
339 |
< |
my = (ymin + ymax) >> 1; |
338 |
> |
mx = (p->xmin + p->xmax) >> 1; |
339 |
> |
my = (p->ymin + p->ymax) >> 1; |
340 |
|
growth = 0; |
341 |
|
|
342 |
|
if (p->kid == NULL) { /* subdivide */ |
343 |
|
|
344 |
|
if ((p->kid = newptree()) == NULL) |
345 |
|
return(0); |
346 |
+ |
|
347 |
+ |
p->kid[UR].xmin = mx; |
348 |
+ |
p->kid[UR].ymin = my; |
349 |
+ |
p->kid[UR].xmax = p->xmax; |
350 |
+ |
p->kid[UR].ymax = p->ymax; |
351 |
+ |
p->kid[UL].xmin = p->xmin; |
352 |
+ |
p->kid[UL].ymin = my; |
353 |
+ |
p->kid[UL].xmax = mx; |
354 |
+ |
p->kid[UL].ymax = p->ymax; |
355 |
+ |
p->kid[DR].xmin = mx; |
356 |
+ |
p->kid[DR].ymin = p->ymin; |
357 |
+ |
p->kid[DR].xmax = p->xmax; |
358 |
+ |
p->kid[DR].ymax = my; |
359 |
+ |
p->kid[DL].xmin = p->xmin; |
360 |
+ |
p->kid[DL].ymin = p->ymin; |
361 |
+ |
p->kid[DL].xmax = mx; |
362 |
+ |
p->kid[DL].ymax = my; |
363 |
|
/* |
364 |
|
* The following paint order can leave a black pixel |
365 |
|
* if redraw() is called in (*dev->paintr)(). |
366 |
|
*/ |
367 |
|
if (p->x >= mx && p->y >= my) |
368 |
|
pcopy(p, p->kid+UR); |
369 |
< |
else |
370 |
< |
paint(p->kid+UR, mx, my, xmax, ymax); |
369 |
> |
else if (paint(p->kid+UR) < 0) |
370 |
> |
quit(1); |
371 |
|
if (p->x < mx && p->y >= my) |
372 |
|
pcopy(p, p->kid+UL); |
373 |
< |
else |
374 |
< |
paint(p->kid+UL, xmin, my, mx, ymax); |
373 |
> |
else if (paint(p->kid+UL) < 0) |
374 |
> |
quit(1); |
375 |
|
if (p->x >= mx && p->y < my) |
376 |
|
pcopy(p, p->kid+DR); |
377 |
< |
else |
378 |
< |
paint(p->kid+DR, mx, ymin, xmax, my); |
377 |
> |
else if (paint(p->kid+DR) < 0) |
378 |
> |
quit(1); |
379 |
|
if (p->x < mx && p->y < my) |
380 |
|
pcopy(p, p->kid+DL); |
381 |
< |
else |
382 |
< |
paint(p->kid+DL, xmin, ymin, mx, my); |
381 |
> |
else if (paint(p->kid+DL) < 0) |
382 |
> |
quit(1); |
383 |
|
|
384 |
|
growth++; |
385 |
|
} |
386 |
|
/* do children */ |
387 |
|
if (mx > pframe.l) { |
388 |
|
if (my > pframe.d) |
389 |
< |
growth += refine(p->kid+DL, xmin, ymin, mx, my, pd-1); |
389 |
> |
growth += refine(p->kid+DL, pd-1); |
390 |
|
if (my < pframe.u) |
391 |
< |
growth += refine(p->kid+UL, xmin, my, mx, ymax, pd-1); |
391 |
> |
growth += refine(p->kid+UL, pd-1); |
392 |
|
} |
393 |
|
if (mx < pframe.r) { |
394 |
|
if (my > pframe.d) |
395 |
< |
growth += refine(p->kid+DR, mx, ymin, xmax, my, pd-1); |
395 |
> |
growth += refine(p->kid+DR, pd-1); |
396 |
|
if (my < pframe.u) |
397 |
< |
growth += refine(p->kid+UR, mx, my, xmax, ymax, pd-1); |
397 |
> |
growth += refine(p->kid+UR, pd-1); |
398 |
|
} |
399 |
|
/* recompute sum */ |
400 |
|
if (growth) { |