| 1 |
– |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
– |
|
| 1 |
|
#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ SGI"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 6 |
– |
|
| 4 |
|
/* |
| 5 |
|
* Routines for drawing samples using depth buffer checks. |
| 6 |
|
*/ |
| 7 |
|
|
| 8 |
|
#include "standard.h" |
| 9 |
|
|
| 13 |
– |
#include <sys/types.h> |
| 10 |
|
#include <GL/glx.h> |
| 11 |
|
#include <GL/glu.h> |
| 12 |
|
|
| 17 |
– |
#include "random.h" |
| 13 |
|
#include "rhd_odraw.h" |
| 14 |
|
|
| 15 |
|
#ifndef DEPTHEPS |
| 21 |
|
#ifndef SFREEFRAC |
| 22 |
|
#define SFREEFRAC 0.2 /* fraction to free at a time */ |
| 23 |
|
#endif |
| 24 |
+ |
#ifndef REDRAWTHRESH |
| 25 |
+ |
#define REDRAWTHRESH 10240 /* number of samples for dissolve */ |
| 26 |
+ |
#endif |
| 27 |
|
#ifndef MAXFAN |
| 28 |
|
#define MAXFAN 32 /* maximum arms in a triangle fan */ |
| 29 |
|
#endif |
| 36 |
|
|
| 37 |
|
#define NEWMAP 01 /* need to recompute mapping */ |
| 38 |
|
#define NEWRGB 02 /* need to remap RGB values */ |
| 39 |
+ |
#define NEWHIST 04 /* clear histogram as well */ |
| 40 |
|
|
| 41 |
|
struct ODview *odView; /* our view list */ |
| 42 |
|
int odNViews; /* number of views in our list */ |
| 56 |
|
int nbytes, i, j, k, nextsamp, count, blockdiv; |
| 57 |
|
int res[2]; |
| 58 |
|
|
| 59 |
< |
if (odNViews) { /* deallocate view structures */ |
| 60 |
< |
for (i = 0; i < odNViews; i++) { |
| 61 |
< |
free((char *)odView[i].bmap); |
| 59 |
> |
if (odNViews > 0) { /* deallocate view structures */ |
| 60 |
> |
for (i = odNViews; i--; ) { |
| 61 |
> |
free((void *)odView[i].bmap); |
| 62 |
> |
free((void *)odView[i].pmap); |
| 63 |
|
if (odView[i].emap != NULL) |
| 64 |
< |
free((char *)odView[i].emap); |
| 64 |
> |
free((void *)odView[i].emap); |
| 65 |
|
} |
| 66 |
< |
free((char *)odView); |
| 66 |
> |
free((void *)odView); |
| 67 |
|
odView = NULL; |
| 68 |
|
odNViews = 0; |
| 69 |
|
} |
| 73 |
|
for (i = 1024; nbytes > i-8; i <<= 1) |
| 74 |
|
; |
| 75 |
|
n = (i-8)/SAMP32 * 32; |
| 76 |
< |
needmapping = NEWMAP; |
| 76 |
> |
needmapping = NEWHIST; |
| 77 |
|
} |
| 78 |
|
if (n != odS.nsamp) { /* (re)allocate sample array */ |
| 79 |
|
if (odS.nsamp) |
| 108 |
|
if (blockdiv < 8) blockdiv = 8; |
| 109 |
|
nextsamp = 0; count /= blockdiv*blockdiv; /* # blocks */ |
| 110 |
|
while (i--) { /* initialize each view */ |
| 111 |
– |
odView[i].emap = NULL; |
| 112 |
– |
odView[i].dmap = NULL; |
| 111 |
|
dev_auxview(i, res); |
| 112 |
|
odView[i].hhi = res[0]; |
| 113 |
|
odView[i].hlow = (res[0] + blockdiv/2) / blockdiv; |
| 115 |
|
odView[i].vhi = res[1]; |
| 116 |
|
odView[i].vlow = (res[1] + blockdiv/2) / blockdiv; |
| 117 |
|
if (odView[i].vlow < 1) odView[i].vlow = 1; |
| 118 |
+ |
odView[i].emap = NULL; |
| 119 |
+ |
odView[i].dmap = NULL; |
| 120 |
+ |
odView[i].pmap = (int4 *)calloc(FL4NELS(res[0]*res[1]), |
| 121 |
+ |
sizeof(int4)); |
| 122 |
+ |
if (odView[i].pmap == NULL) |
| 123 |
+ |
return(0); |
| 124 |
|
j = odView[i].hlow*odView[i].vlow; |
| 125 |
|
odView[i].bmap = (struct ODblock *)malloc( |
| 126 |
|
j * sizeof(struct ODblock)); |
| 129 |
|
DCHECK(count<=0 | nextsamp>=n, |
| 130 |
|
CONSISTENCY, "counter botch in odInit"); |
| 131 |
|
if (!i) count = j; |
| 132 |
< |
while (j--) { |
| 132 |
> |
odView[i].sfirst = nextsamp; |
| 133 |
> |
while (j--) { /* initialize blocks & free lists */ |
| 134 |
> |
odView[i].bmap[j].pthresh = FHUGE; |
| 135 |
|
odView[i].bmap[j].first = k = nextsamp; |
| 136 |
|
nextsamp += odView[i].bmap[j].nsamp = |
| 137 |
|
(n - nextsamp)/count--; |
| 141 |
|
odS.nextfree(k-1) = ENDFREE; |
| 142 |
|
odView[i].bmap[j].nused = 0; |
| 143 |
|
} |
| 144 |
+ |
odView[i].snext = nextsamp; |
| 145 |
+ |
odView[i].n2redraw = 0; |
| 146 |
|
} |
| 147 |
|
CLR4ALL(odS.redraw, odS.nsamp); /* clear redraw flags */ |
| 148 |
< |
for (i = odS.nsamp; i--; ) /* clear values */ |
| 148 |
> |
for (i = odS.nsamp; i--; ) { /* clear values */ |
| 149 |
|
odS.ip[i][0] = odS.ip[i][1] = -1; |
| 150 |
+ |
odS.brt[i] = TM_NOBRT; |
| 151 |
+ |
} |
| 152 |
+ |
needmapping |= NEWMAP; /* compute new map on update */ |
| 153 |
|
return(odS.nsamp); /* return number of samples */ |
| 154 |
|
} |
| 155 |
|
|
| 167 |
|
|
| 168 |
|
|
| 169 |
|
int |
| 170 |
< |
odAllocBlockSamp(vn, hl, vl) /* allocate sample from block */ |
| 171 |
< |
int vn, hl, vl; |
| 170 |
> |
odAllocBlockSamp(vn, hh, vh, prox) /* allocate sample from block */ |
| 171 |
> |
int vn, hh, vh; |
| 172 |
> |
double prox; |
| 173 |
|
{ |
| 174 |
|
int si[SAMPSPERBLOCK+SAMPSPERBLOCK/4]; |
| 175 |
+ |
int hl, vl; |
| 176 |
|
VIEW *vw; |
| 177 |
|
FVECT ro, rd; |
| 178 |
|
int res[2]; |
| 179 |
|
register struct ODblock *bp; |
| 180 |
< |
register int i; |
| 181 |
< |
|
| 180 |
> |
register int i, j; |
| 181 |
> |
/* get block */ |
| 182 |
> |
hl = hh*odView[vn].hlow/odView[vn].hhi; |
| 183 |
> |
vl = vh*odView[vn].vlow/odView[vn].vhi; |
| 184 |
|
bp = odView[vn].bmap + vl*odView[vn].hlow + hl; |
| 185 |
< |
if (bp->free != ENDFREE) { /* check free list first */ |
| 185 |
> |
if (prox > bp->pthresh) |
| 186 |
> |
return(-1); /* worse than free list occupants */ |
| 187 |
> |
/* check for duplicate pixel */ |
| 188 |
> |
if (CHK4(odView[vn].pmap, vh*odView[vn].hhi + hh)) |
| 189 |
> |
i = bp->first + bp->nsamp; |
| 190 |
> |
else |
| 191 |
> |
i = 0; |
| 192 |
> |
while (i-- > bp->first) |
| 193 |
> |
if (hh == odS.ip[i][0] && vh == odS.ip[i][1]) { /* found it! */ |
| 194 |
> |
/* search free list for it */ |
| 195 |
> |
if (i == bp->free) |
| 196 |
> |
break; /* special case */ |
| 197 |
> |
if (bp->free != ENDFREE) |
| 198 |
> |
for (j = bp->free; odS.nextfree(j) != ENDFREE; |
| 199 |
> |
j = odS.nextfree(j)) |
| 200 |
> |
if (odS.nextfree(j) == i) { |
| 201 |
> |
odS.nextfree(j) = |
| 202 |
> |
odS.nextfree(i); |
| 203 |
> |
bp->nused++; |
| 204 |
> |
goto gotit; |
| 205 |
> |
} |
| 206 |
> |
if (prox >= 0.99*odS.closeness(i)) |
| 207 |
> |
return(-1); /* previous sample is fine */ |
| 208 |
> |
goto gotit; |
| 209 |
> |
} |
| 210 |
> |
if (bp->free != ENDFREE) { /* allocate from free list */ |
| 211 |
|
i = bp->free; |
| 212 |
+ |
if (odS.ip[i][0] >= 0 & odS.ip[i][1] >= 0) |
| 213 |
+ |
CLR4(odView[vn].pmap, odS.ip[i][1]*odView[vn].hhi + |
| 214 |
+ |
odS.ip[i][0]); |
| 215 |
|
bp->free = odS.nextfree(i); |
| 216 |
|
bp->nused++; |
| 217 |
< |
return(i); |
| 217 |
> |
goto gotit; |
| 218 |
|
} |
| 219 |
|
DCHECK(bp->nsamp<=0, CONSISTENCY, |
| 220 |
|
"no available samples in odAllocBlockSamp"); |
| 226 |
|
for (i = bp->nsamp; i--; ) /* figure out which are worse */ |
| 227 |
|
si[i] = bp->first + i; |
| 228 |
|
qsort((char *)si, bp->nsamp, sizeof(int), sampcmp); |
| 229 |
< |
i = bp->nsamp*SFREEFRAC + .5; /* put them in a list */ |
| 229 |
> |
i = bp->nsamp*SFREEFRAC + .5; /* put them into free list */ |
| 230 |
> |
if (i >= bp->nsamp) i = bp->nsamp-1; /* paranoia */ |
| 231 |
> |
bp->pthresh = odS.closeness(si[i]); /* new proximity threshold */ |
| 232 |
|
while (--i > 0) { |
| 233 |
|
odS.nextfree(si[i]) = bp->free; |
| 234 |
|
bp->free = si[i]; |
| 235 |
|
bp->nused--; |
| 236 |
|
} |
| 237 |
< |
return(si[0]); /* return first free sample */ |
| 237 |
> |
i = si[0]; /* use worst sample */ |
| 238 |
> |
CLR4(odView[vn].pmap, odS.ip[i][1]*odView[vn].hhi + odS.ip[i][0]); |
| 239 |
> |
gotit: |
| 240 |
> |
odS.ip[i][0] = hh; |
| 241 |
> |
odS.ip[i][1] = vh; |
| 242 |
> |
odS.closeness(i) = prox; |
| 243 |
> |
SET4(odView[vn].pmap, vh*odView[vn].hhi + hh); |
| 244 |
> |
return(i); |
| 245 |
|
} |
| 246 |
|
|
| 247 |
|
|
| 250 |
|
FVECT d, p; |
| 251 |
|
{ |
| 252 |
|
FVECT disp; |
| 253 |
< |
double d0, d1, h, v; |
| 253 |
> |
double d0, d1, h, v, prox; |
| 254 |
|
register VIEW *vw; |
| 255 |
< |
int hl, vl, hh, vh; |
| 255 |
> |
int hh, vh; |
| 256 |
|
int res[2]; |
| 257 |
|
register int i, id; |
| 258 |
|
|
| 287 |
|
(1.+DEPTHEPS)*d0 < d1)) |
| 288 |
|
continue; /* occlusion error */ |
| 289 |
|
} |
| 238 |
– |
hl = hh*odView[i].hlow/res[0]; |
| 239 |
– |
vl = vh*odView[i].vlow/res[1]; |
| 240 |
– |
/* may duplicate samples */ |
| 241 |
– |
id = odAllocBlockSamp(i, hl, vl); |
| 242 |
– |
odS.ip[id][0] = hh; |
| 243 |
– |
odS.ip[id][1] = vh; |
| 290 |
|
if (p != NULL) { /* compute closeness (sin^2) */ |
| 291 |
|
d1 = DOT(disp, d); |
| 292 |
< |
odS.closeness(id) = 1. - d1*d1/DOT(disp,disp); |
| 292 |
> |
prox = 1. - d1*d1/DOT(disp,disp); |
| 293 |
|
} else |
| 294 |
< |
odS.closeness(id) = 0.; |
| 294 |
> |
prox = 0.; |
| 295 |
> |
/* allocate sample */ |
| 296 |
> |
id = odAllocBlockSamp(i, hh, vh, prox); |
| 297 |
> |
if (id < 0) |
| 298 |
> |
continue; /* not good enough */ |
| 299 |
|
/* convert color */ |
| 300 |
|
tmCvColrs(&odS.brt[id], odS.chr[id], c, 1); |
| 301 |
|
if (imm_mode | needmapping) /* if immediate mode */ |
| 303 |
|
else /* else map it now */ |
| 304 |
|
tmMapPixels(odS.rgb[id], &odS.brt[id], odS.chr[id], 1); |
| 305 |
|
SET4(odS.redraw, id); /* mark for redraw */ |
| 306 |
+ |
odView[i].n2redraw++; |
| 307 |
|
} |
| 308 |
|
} |
| 309 |
|
|
| 310 |
|
|
| 311 |
< |
odRemap() /* recompute tone mapping */ |
| 311 |
> |
odRemap(newhist) /* recompute tone mapping */ |
| 312 |
> |
int newhist; |
| 313 |
|
{ |
| 314 |
|
needmapping |= NEWMAP|NEWRGB; |
| 315 |
+ |
if (newhist) |
| 316 |
+ |
needmapping |= NEWHIST; |
| 317 |
|
} |
| 318 |
|
|
| 319 |
|
|
| 320 |
+ |
odRedrawAll() /* mark all samples for redraw */ |
| 321 |
+ |
{ |
| 322 |
+ |
register int i; |
| 323 |
+ |
|
| 324 |
+ |
if ((needmapping&(NEWMAP|NEWRGB)) == (NEWMAP|NEWRGB)) |
| 325 |
+ |
return; /* will be called later, anyway */ |
| 326 |
+ |
for (i = odS.nsamp; i--; ) |
| 327 |
+ |
if (odS.ip[i][0] >= 0) |
| 328 |
+ |
SET4(odS.redraw, i); |
| 329 |
+ |
/* not right, but not important */ |
| 330 |
+ |
for (i = 0; i < odNViews; i++) |
| 331 |
+ |
odView[i].n2redraw = odView[i].snext - odView[i].sfirst; |
| 332 |
+ |
} |
| 333 |
+ |
|
| 334 |
+ |
|
| 335 |
|
odRedraw(vn, hmin, vmin, hmax, vmax) /* redraw view region */ |
| 336 |
|
int vn, hmin, vmin, hmax, vmax; |
| 337 |
|
{ |
| 358 |
|
for (j = vmin; j <= vmax; j++) { |
| 359 |
|
bp = odView[vn].bmap + j*odView[vn].hlow + i; |
| 360 |
|
for (k = bp->nsamp; k--; ) |
| 361 |
< |
if (odS.ip[bp->first+k][0] >= 0) |
| 361 |
> |
if (odS.ip[bp->first+k][0] >= 0) { |
| 362 |
|
SET4(odS.redraw, bp->first+k); |
| 363 |
+ |
odView[vn].n2redraw++; |
| 364 |
+ |
} |
| 365 |
|
} |
| 366 |
|
} |
| 367 |
|
|
| 374 |
|
int i, j, hmin, hmax, vmin, vmax; |
| 375 |
|
register int k, l; |
| 376 |
|
|
| 306 |
– |
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
| 307 |
– |
"bad view number in odDepthMap"); |
| 377 |
|
if (dm == NULL) { /* free edge map */ |
| 378 |
+ |
if (vn<0 | vn>=odNViews) |
| 379 |
+ |
return; /* too late -- they're gone! */ |
| 380 |
|
if (odView[vn].emap != NULL) |
| 381 |
< |
free((char *)odView[vn].emap); |
| 381 |
> |
free((void *)odView[vn].emap); |
| 382 |
|
odView[vn].emap = NULL; |
| 383 |
|
odView[vn].dmap = NULL; |
| 384 |
|
return; |
| 385 |
|
} |
| 386 |
+ |
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
| 387 |
+ |
"bad view number in odDepthMap"); |
| 388 |
|
odView[vn].dmap = dm; /* initialize edge map */ |
| 389 |
|
if (odView[vn].emap == NULL) { |
| 390 |
|
odView[vn].emap = (int4 *)malloc( |
| 442 |
|
odUpdate(vn) /* update this view */ |
| 443 |
|
int vn; |
| 444 |
|
{ |
| 445 |
< |
int i, j; |
| 446 |
< |
register struct ODblock *bp; |
| 447 |
< |
register int k; |
| 445 |
> |
static short primes[] = {9431,6803,4177,2659,1609,887,587,251,47,1}; |
| 446 |
> |
int myprime; |
| 447 |
> |
register int i, n; |
| 448 |
|
|
| 449 |
|
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
| 450 |
|
"bad view number in odUpdate"); |
| 451 |
|
/* need to do some tone mapping? */ |
| 452 |
|
if (needmapping & NEWRGB) { |
| 453 |
|
if (needmapping & NEWMAP) { |
| 454 |
< |
tmClearHisto(); |
| 454 |
> |
if (needmapping & NEWHIST) |
| 455 |
> |
tmClearHisto(); |
| 456 |
> |
needmapping &= ~NEWHIST; |
| 457 |
|
if (tmAddHisto(odS.brt,odS.nsamp,1) != TM_E_OK) |
| 458 |
|
return; |
| 459 |
|
if (tmComputeMapping(0.,0.,0.) != TM_E_OK) |
| 460 |
|
return; |
| 461 |
< |
for (k = odS.nsamp; k--; ) /* redraw all */ |
| 462 |
< |
if (odS.ip[k][0] >= 0) |
| 388 |
< |
SET4(odS.redraw, k); |
| 461 |
> |
needmapping &= ~NEWMAP; |
| 462 |
> |
odRedrawAll(); /* redraw everything */ |
| 463 |
|
} |
| 464 |
|
if (tmMapPixels(odS.rgb,odS.brt,odS.chr,odS.nsamp) != TM_E_OK) |
| 465 |
|
return; |
| 466 |
< |
needmapping = 0; /* reset flag */ |
| 466 |
> |
needmapping &= ~NEWRGB; |
| 467 |
|
} |
| 468 |
< |
/* draw each block in view */ |
| 469 |
< |
for (i = odView[vn].hlow; i--; ) |
| 470 |
< |
for (j = odView[vn].vlow; j--; ) { |
| 471 |
< |
/* get block */ |
| 472 |
< |
bp = odView[vn].bmap + j*odView[vn].hlow + i; |
| 473 |
< |
/* do quick, conservative flag check */ |
| 474 |
< |
for (k = (bp->first+bp->nsamp+31)>>5; |
| 475 |
< |
k-- > bp->first>>5; ) |
| 476 |
< |
if (odS.redraw[k]) |
| 477 |
< |
break; /* non-zero flag */ |
| 478 |
< |
if (k < bp->first>>5) |
| 479 |
< |
continue; /* no flags set */ |
| 480 |
< |
for (k = bp->nsamp; k--; ) /* sample by sample */ |
| 481 |
< |
if (CHK4(odS.redraw, bp->first+k)) { |
| 482 |
< |
odDrawBlockSamp(vn, i, j, bp->first+k); |
| 483 |
< |
CLR4(odS.redraw, bp->first+k); |
| 484 |
< |
} |
| 468 |
> |
if (odView[vn].n2redraw <= 0) |
| 469 |
> |
return; |
| 470 |
> |
#if REDRAWTHRESH |
| 471 |
> |
if (odView[vn].n2redraw < REDRAWTHRESH) |
| 472 |
> |
goto quickdraw; |
| 473 |
> |
/* pick a good prime step size */ |
| 474 |
> |
n = odView[vn].snext - odView[vn].sfirst; |
| 475 |
> |
for (i = 0; primes[i]<<5 >= n; i++) |
| 476 |
> |
; |
| 477 |
> |
while ((myprime = primes[i++]) > 1) |
| 478 |
> |
if (n % myprime) |
| 479 |
> |
break; |
| 480 |
> |
/* dissolve in new samples */ |
| 481 |
> |
for (i = odView[vn].sfirst; n-- > 0; i += myprime) { |
| 482 |
> |
if (i >= odView[vn].snext) |
| 483 |
> |
i -= odView[vn].snext - odView[vn].sfirst; |
| 484 |
> |
if (CHK4(odS.redraw, i)) { |
| 485 |
> |
odDrawSamp(vn, i); |
| 486 |
> |
CLR4(odS.redraw, i); |
| 487 |
|
} |
| 488 |
+ |
} |
| 489 |
+ |
odView[vn].n2redraw = 0; |
| 490 |
+ |
return; |
| 491 |
+ |
quickdraw: /* quicker sparse flag checking */ |
| 492 |
+ |
#endif |
| 493 |
+ |
/* redraw samples at end */ |
| 494 |
+ |
for (i = odView[vn].snext-31; i < odView[vn].snext; i++) |
| 495 |
+ |
if (CHK4(odS.redraw, i)) { |
| 496 |
+ |
odDrawSamp(vn, i); |
| 497 |
+ |
CLR4(odS.redraw, i); |
| 498 |
+ |
} |
| 499 |
+ |
/* faster flag checks in middle */ |
| 500 |
+ |
for (n = odView[vn].snext>>5; n-- > (odView[vn].sfirst+0x1f)>>5; ) |
| 501 |
+ |
for (i = 0; odS.redraw[n]; i++) /* skips faster */ |
| 502 |
+ |
if (odS.redraw[n] & 1L<<i) { |
| 503 |
+ |
odDrawSamp(vn, (n<<5)+i); |
| 504 |
+ |
odS.redraw[n] &= ~(1L<<i); |
| 505 |
+ |
} |
| 506 |
+ |
/* redraw samples at beginning */ |
| 507 |
+ |
for (i = odView[vn].sfirst; i < odView[vn].sfirst+31; i++) |
| 508 |
+ |
if (CHK4(odS.redraw, i)) { |
| 509 |
+ |
odDrawSamp(vn, i); |
| 510 |
+ |
CLR4(odS.redraw, i); |
| 511 |
+ |
} |
| 512 |
+ |
odView[vn].n2redraw = 0; |
| 513 |
|
} |
| 514 |
|
|
| 515 |
|
|
| 516 |
+ |
/* this turned out to be unnecessary */ |
| 517 |
|
#if 0 |
| 518 |
|
static |
| 519 |
|
clip_end(p, o, vp) /* clip line segment to view */ |
| 551 |
|
double sz; |
| 552 |
|
{ |
| 553 |
|
int na, dv; |
| 554 |
< |
double hrad, vrad, phi0, phi; |
| 554 |
> |
double hrad, vrad, phi; |
| 555 |
|
register int i; |
| 556 |
|
|
| 557 |
|
DCHECK(sz > 1, CONSISTENCY, "super-unary size in make_arms"); |
| 558 |
< |
na = MAXFAN*sz*sz + 0.5; /* keep area constant */ |
| 558 |
> |
na = MAXFAN*sz + 0.5; /* keep arc length constant */ |
| 559 |
|
if (na < MINFAN) na = MINFAN; |
| 560 |
|
hrad = FANSIZE*sz*vp->hhi/vp->hlow; |
| 561 |
|
vrad = FANSIZE*sz*vp->vhi/vp->vlow; |
| 562 |
|
if (hrad*vrad < 2.25) |
| 563 |
|
hrad = vrad = 1.5; |
| 462 |
– |
phi0 = (2.*PI) * frandom(); |
| 564 |
|
dv = OMAXDEPTH*sz + 0.5; |
| 565 |
|
for (i = 0; i < na; i++) { |
| 566 |
< |
phi = phi0 + (2.*PI)*i/na; |
| 566 |
> |
phi = (2.*PI)*i/na; |
| 567 |
|
ar[i][0] = cp[0] + tcos(phi)*hrad + 0.5; |
| 568 |
|
ar[i][1] = cp[1] + tsin(phi)*vrad + 0.5; |
| 569 |
|
ar[i][2] = dv; |
| 616 |
|
n = rise + run; |
| 617 |
|
while (n--) /* run out arm, checking depth */ |
| 618 |
|
if (run2 > rise2) { |
| 518 |
– |
if (depthchange(vp, x, y, x+xstep, y)) |
| 519 |
– |
break; |
| 619 |
|
x += xstep; |
| 620 |
|
rise2 += rise; |
| 621 |
< |
} else { |
| 523 |
< |
if (depthchange(vp, x, y, x, y+ystep)) |
| 621 |
> |
if (depthchange(vp, x-xstep, y, x, y)) |
| 622 |
|
break; |
| 623 |
+ |
} else { |
| 624 |
|
y += ystep; |
| 625 |
|
run2 += run; |
| 626 |
+ |
if (depthchange(vp, x, y-ystep, x, y)) |
| 627 |
+ |
break; |
| 628 |
|
} |
| 629 |
|
if (n < 0) /* found something? */ |
| 630 |
|
return; |
| 648 |
|
} |
| 649 |
|
|
| 650 |
|
|
| 651 |
< |
odDrawBlockSamp(vn, h, v, id) /* draw sample in view block */ |
| 652 |
< |
int vn, h, v; |
| 651 |
> |
static int |
| 652 |
> |
blockedge(vp, bi0, bi1) /* check for edge between blocks? */ |
| 653 |
> |
register struct ODview *vp; |
| 654 |
> |
register int bi0, bi1; |
| 655 |
> |
{ |
| 656 |
> |
if (bi1 == bi0) |
| 657 |
> |
return(0); /* same block */ |
| 658 |
> |
if (bi1 < 0) |
| 659 |
> |
return(1); /* end off view */ |
| 660 |
> |
if (CHK4(vp->emap, bi1)) |
| 661 |
> |
return(1); /* end block has edges */ |
| 662 |
> |
if (bi1 == bi0+1 || bi1 == bi0-1 || |
| 663 |
> |
bi1 == bi0+vp->hlow || bi1 == bi0-vp->hlow) |
| 664 |
> |
return(0); /* end in adjacent block -- no edges */ |
| 665 |
> |
return(1); /* conservative for rarer case */ |
| 666 |
> |
} |
| 667 |
> |
|
| 668 |
> |
|
| 669 |
> |
odDrawSamp(vn, id) /* draw view sample */ |
| 670 |
> |
int vn; |
| 671 |
|
register int id; |
| 672 |
|
{ |
| 673 |
|
GLshort arm[MAXFAN][3]; |
| 674 |
< |
int narms, blockindex, bi1; |
| 674 |
> |
int narms, blockindex; |
| 675 |
|
register struct ODview *vp; |
| 676 |
|
double size; |
| 677 |
|
int home_edges; |
| 678 |
|
register int i; |
| 679 |
|
|
| 680 |
|
vp = odView + vn; |
| 681 |
< |
blockindex = v*vp->hlow + h; |
| 682 |
< |
DCHECK(odS.ip[id][0]*vp->hlow/vp->hhi != h | |
| 564 |
< |
odS.ip[id][1]*vp->vlow/vp->vhi != v, |
| 565 |
< |
CONSISTENCY, "bad sample position in odDrawBlockSamp"); |
| 681 |
> |
blockindex = getblock(vp, odS.ip[id][0], odS.ip[id][1]); |
| 682 |
> |
DCHECK(blockindex<0, CONSISTENCY, "bad sample handed to odDrawSamp"); |
| 683 |
|
DCHECK(vp->bmap[blockindex].nused <= 0, |
| 684 |
< |
CONSISTENCY, "bad in-use count in odDrawBlockSamp"); |
| 684 |
> |
CONSISTENCY, "bad in-use count in odDrawSamp"); |
| 685 |
|
/* create triangle fan */ |
| 686 |
|
size = 1./sqrt((double)vp->bmap[blockindex].nused); |
| 687 |
|
narms = make_arms(arm, odS.ip[id], vp, size); |
| 688 |
|
if (vp->emap != NULL) { /* check for edge collisions */ |
| 689 |
|
home_edges = CHK4(vp->emap, blockindex); |
| 690 |
|
for (i = 0; i < narms; i++) |
| 691 |
< |
/* the following test is flawed, because we could |
| 692 |
< |
* be passing through a block on a diagonal run */ |
| 576 |
< |
if (home_edges || |
| 577 |
< |
( (bi1 = getblock(vp, arm[i][0], arm[i][1])) |
| 578 |
< |
!= blockindex && |
| 579 |
< |
(bi1 < 0 || CHK4(vp->emap, bi1)) )) |
| 691 |
> |
if (home_edges || blockedge(vp, blockindex, |
| 692 |
> |
getblock(vp, arm[i][0], arm[i][1]))) |
| 693 |
|
clip_edge(arm[i], odS.ip[id], vp); |
| 694 |
|
} |
| 695 |
|
/* draw triangle fan */ |
