| 1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* sm_ogl.c |
| 9 |
*/ |
| 10 |
#include "standard.h" |
| 11 |
|
| 12 |
#include <GL/gl.h> |
| 13 |
|
| 14 |
#ifdef TEST_DRIVER |
| 15 |
#include <gl/device.h> |
| 16 |
#include <GL/glu.h> |
| 17 |
#include <glut.h> |
| 18 |
#endif |
| 19 |
#include "sm_flag.h" |
| 20 |
#include "sm_list.h" |
| 21 |
#include "sm_geom.h" |
| 22 |
#include "sm_qtree.h" |
| 23 |
#include "sm_stree.h" |
| 24 |
#include "sm.h" |
| 25 |
|
| 26 |
#ifdef TEST_DRIVER |
| 27 |
#include "sm_draw.h" |
| 28 |
/*static char smClean_notify = TRUE; |
| 29 |
MAKE STATIC LATER: ui.c using for now; |
| 30 |
*/ |
| 31 |
char smClean_notify = TRUE; |
| 32 |
#else |
| 33 |
static int smClean_notify = TRUE; |
| 34 |
#endif |
| 35 |
|
| 36 |
typedef struct { |
| 37 |
float dist; /* average distance */ |
| 38 |
BYTE rgb[3]; /* average color */ |
| 39 |
} QTRAVG; /* average quadtree value */ |
| 40 |
|
| 41 |
typedef struct { |
| 42 |
QUADTREE qt; /* quadtree node (key & hash value) */ |
| 43 |
QTRAVG av; /* node average */ |
| 44 |
} QT_LUENT; /* lookup table entry */ |
| 45 |
|
| 46 |
static QT_LUENT *qt_htbl = NULL; /* quadtree cache */ |
| 47 |
static int qt_hsiz = 0; /* quadtree cache size */ |
| 48 |
|
| 49 |
|
| 50 |
typedef struct _T_DEPTH { |
| 51 |
int tri; |
| 52 |
double depth; |
| 53 |
}T_DEPTH; |
| 54 |
|
| 55 |
/* |
| 56 |
* smClean(tmflag) : display has been wiped clean |
| 57 |
* int tmflag; |
| 58 |
* Called after display has been effectively cleared, meaning that all |
| 59 |
* geometry must be resent down the pipeline in the next call to smUpdate(). |
| 60 |
* If tmflag is set, tone-mapping should be performed |
| 61 |
*/ |
| 62 |
smClean(tmflag) |
| 63 |
int tmflag; |
| 64 |
{ |
| 65 |
smClean_notify = TRUE; |
| 66 |
if(tmflag) |
| 67 |
SM_TONE_MAP(smMesh) = 0; |
| 68 |
} |
| 69 |
|
| 70 |
int |
| 71 |
qtCache_init(nel) /* initialize for at least nel elements */ |
| 72 |
int nel; |
| 73 |
{ |
| 74 |
static int hsiztab[] = { |
| 75 |
8191, 16381, 32749, 65521, 131071, 262139, 524287, 1048573, 0 |
| 76 |
}; |
| 77 |
register int i; |
| 78 |
|
| 79 |
if (nel <= 0) { /* call to free table */ |
| 80 |
if (qt_hsiz) { |
| 81 |
free((char *)qt_htbl); |
| 82 |
qt_htbl = NULL; |
| 83 |
qt_hsiz = 0; |
| 84 |
} |
| 85 |
return(0); |
| 86 |
} |
| 87 |
nel += nel>>1; /* 66% occupancy */ |
| 88 |
for (i = 0; hsiztab[i]; i++) |
| 89 |
if (hsiztab[i] > nel) |
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break; |
| 91 |
if (!(qt_hsiz = hsiztab[i])) |
| 92 |
qt_hsiz = nel*2 + 1; /* not always prime */ |
| 93 |
qt_htbl = (QT_LUENT *)calloc(qt_hsiz, sizeof(QT_LUENT)); |
| 94 |
if (qt_htbl == NULL) |
| 95 |
qt_hsiz = 0; |
| 96 |
for (i = qt_hsiz; i--; ) |
| 97 |
qt_htbl[i].qt = EMPTY; |
| 98 |
return(qt_hsiz); |
| 99 |
} |
| 100 |
|
| 101 |
QT_LUENT * |
| 102 |
qtCache_find(qt) /* find a quadtree table entry */ |
| 103 |
QUADTREE qt; |
| 104 |
{ |
| 105 |
int i, n; |
| 106 |
register int ndx; |
| 107 |
register QT_LUENT *le; |
| 108 |
|
| 109 |
if (qt_hsiz == 0 && !qtCache_init(1)) |
| 110 |
return(NULL); |
| 111 |
tryagain: /* hash table lookup */ |
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ndx = (unsigned long)qt % qt_hsiz; |
| 113 |
for (i = 0, n = 1; i < qt_hsiz; i++, n += 2) { |
| 114 |
le = &qt_htbl[ndx]; |
| 115 |
if (QT_IS_EMPTY(le->qt) || le->qt == qt) |
| 116 |
return(le); |
| 117 |
if ((ndx += n) >= qt_hsiz) /* this happens rarely */ |
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ndx = ndx % qt_hsiz; |
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} |
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/* table is full, reallocate */ |
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le = qt_htbl; |
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ndx = qt_hsiz; |
| 123 |
if (!qtCache_init(ndx+1)) { /* no more memory! */ |
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qt_htbl = le; |
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qt_hsiz = ndx; |
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return(NULL); |
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} |
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/* copy old table to new and free */ |
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while (ndx--) |
| 130 |
if (!QT_IS_EMPTY(le[ndx].qt)) |
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copystruct(qtCache_find(le[ndx].qt), &le[ndx]); |
| 132 |
free((char *)le); |
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goto tryagain; /* should happen only once! */ |
| 134 |
} |
| 135 |
|
| 136 |
stCount_level_leaves(lcnt, qt) /* count quadtree leaf nodes at each level */ |
| 137 |
int lcnt[]; |
| 138 |
register QUADTREE qt; |
| 139 |
{ |
| 140 |
if (QT_IS_EMPTY(qt)) |
| 141 |
return; |
| 142 |
if (QT_IS_TREE(qt)) { |
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if (!QT_IS_FLAG(qt)) /* not in our frustum */ |
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return; |
| 145 |
stCount_level_leaves(lcnt+1, QT_NTH_CHILD(qt,0)); |
| 146 |
stCount_level_leaves(lcnt+1, QT_NTH_CHILD(qt,1)); |
| 147 |
stCount_level_leaves(lcnt+1, QT_NTH_CHILD(qt,2)); |
| 148 |
stCount_level_leaves(lcnt+1, QT_NTH_CHILD(qt,3)); |
| 149 |
} |
| 150 |
else |
| 151 |
if(QT_LEAF_IS_FLAG(qt)) |
| 152 |
lcnt[0]++; |
| 153 |
} |
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|
| 155 |
|
| 156 |
QTRAVG * |
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qtRender_level(qt,v0,v1,v2,sm,lvl) |
| 158 |
QUADTREE qt; |
| 159 |
FVECT v0,v1,v2; |
| 160 |
SM *sm; |
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int lvl; |
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{ |
| 163 |
FVECT a,b,c; |
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register QT_LUENT *le; |
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QTRAVG *rc[4]; |
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TRI *tri; |
| 167 |
|
| 168 |
if (QT_IS_EMPTY(qt)) /* empty leaf node */ |
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return(NULL); |
| 170 |
if (QT_IS_TREE(qt) && !QT_IS_FLAG(qt)) /* not in our frustum */ |
| 171 |
return(NULL); |
| 172 |
if(QT_IS_LEAF(qt) && !QT_LEAF_IS_FLAG(qt)) /* not in our frustum */ |
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return(NULL); |
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/* else look up node */ |
| 175 |
if ((le = qtCache_find(qt)) == NULL) |
| 176 |
error(SYSTEM, "out of memory in qtRender_level"); |
| 177 |
if (QT_IS_TREE(qt) && (QT_IS_EMPTY(le->qt) || lvl > 0)) |
| 178 |
{ /* compute children */ |
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qtSubdivide_tri(v0,v1,v2,a,b,c); |
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rc[0] = qtRender_level(QT_NTH_CHILD(qt,0),v0,c,b,sm,lvl-1); |
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rc[1] = qtRender_level(QT_NTH_CHILD(qt,1),c,v1,a,sm,lvl-1); |
| 182 |
rc[2] = qtRender_level(QT_NTH_CHILD(qt,2),b,a,v2,sm,lvl-1); |
| 183 |
rc[3] = qtRender_level(QT_NTH_CHILD(qt,3),a,b,c,sm,lvl-1); |
| 184 |
} |
| 185 |
if (QT_IS_EMPTY(le->qt)) |
| 186 |
{ /* let's make some data! */ |
| 187 |
int rgbs[3]; |
| 188 |
double distsum; |
| 189 |
register int i, n; |
| 190 |
/* average our triangle vertices */ |
| 191 |
rgbs[0] = rgbs[1] = rgbs[2] = 0; |
| 192 |
distsum = 0.; n = 0; |
| 193 |
if(QT_IS_TREE(qt)) |
| 194 |
{ /* from subtree */ |
| 195 |
for (i = 4; i--; ) |
| 196 |
if (rc[i] != NULL) |
| 197 |
{ |
| 198 |
rgbs[0] += rc[i]->rgb[0]; rgbs[1] += rc[i]->rgb[1]; |
| 199 |
rgbs[2] += rc[i]->rgb[2]; distsum += rc[i]->dist; n++; |
| 200 |
} |
| 201 |
} |
| 202 |
else |
| 203 |
{ /* from triangle set */ |
| 204 |
OBJECT *os; |
| 205 |
int s0, s1, s2; |
| 206 |
|
| 207 |
os = qtqueryset(qt); |
| 208 |
for (i = os[0]; i; i--) |
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{ |
| 210 |
if(SM_IS_NTH_T_BASE(sm,os[i])) |
| 211 |
continue; |
| 212 |
tri = SM_NTH_TRI(sm,os[i]); |
| 213 |
if(!T_IS_VALID(tri)) |
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continue; |
| 215 |
n++; |
| 216 |
s0 = T_NTH_V(tri,0); |
| 217 |
s1 = T_NTH_V(tri,1); |
| 218 |
s2 = T_NTH_V(tri,2); |
| 219 |
VCOPY(a,SM_NTH_WV(sm,s0)); |
| 220 |
VCOPY(b,SM_NTH_WV(sm,s1)); |
| 221 |
VCOPY(c,SM_NTH_WV(sm,s2)); |
| 222 |
distsum += SM_BG_SAMPLE(sm,s0) ? dev_zmax |
| 223 |
: sqrt(dist2(a,SM_VIEW_CENTER(sm))); |
| 224 |
distsum += SM_BG_SAMPLE(sm,s1) ? dev_zmax |
| 225 |
: sqrt(dist2(b,SM_VIEW_CENTER(sm))); |
| 226 |
distsum += SM_BG_SAMPLE(sm,s2) ? dev_zmax |
| 227 |
: sqrt(dist2(c,SM_VIEW_CENTER(sm))); |
| 228 |
rgbs[0] += SM_NTH_RGB(sm,s0)[0] + SM_NTH_RGB(sm,s1)[0] |
| 229 |
+ SM_NTH_RGB(sm,s2)[0]; |
| 230 |
rgbs[1] += SM_NTH_RGB(sm,s0)[1] + SM_NTH_RGB(sm,s1)[1] |
| 231 |
+ SM_NTH_RGB(sm,s2)[1]; |
| 232 |
rgbs[2] += SM_NTH_RGB(sm,s0)[2] + SM_NTH_RGB(sm,s1)[2] |
| 233 |
+ SM_NTH_RGB(sm,s2)[2]; |
| 234 |
} |
| 235 |
n *= 3; |
| 236 |
} |
| 237 |
if (!n) |
| 238 |
return(NULL); |
| 239 |
le->qt = qt; |
| 240 |
le->av.rgb[0] = rgbs[0]/n; le->av.rgb[1] = rgbs[1]/n; |
| 241 |
le->av.rgb[2] = rgbs[2]/n; le->av.dist = distsum/(double)n; |
| 242 |
} |
| 243 |
if (lvl == 0 || (lvl > 0 && QT_IS_LEAF(qt))) |
| 244 |
{ /* render this node */ |
| 245 |
/* compute pseudo vertices */ |
| 246 |
VCOPY(a,v0); VCOPY(b,v1); VCOPY(c,v2); |
| 247 |
normalize(a); normalize(b); normalize(c); |
| 248 |
VSUM(a,SM_VIEW_CENTER(sm),a,le->av.dist); |
| 249 |
VSUM(b,SM_VIEW_CENTER(sm),b,le->av.dist); |
| 250 |
VSUM(c,SM_VIEW_CENTER(sm),c,le->av.dist); |
| 251 |
/* draw triangle */ |
| 252 |
glColor3ub(le->av.rgb[0],le->av.rgb[1],le->av.rgb[2]); |
| 253 |
glVertex3d(a[0],a[1],a[2]); |
| 254 |
glVertex3d(b[0],b[1],b[2]); |
| 255 |
glVertex3d(c[0],c[1],c[2]); |
| 256 |
|
| 257 |
} |
| 258 |
return(&le->av); |
| 259 |
} |
| 260 |
|
| 261 |
|
| 262 |
smRender_stree_level(sm,lvl) |
| 263 |
SM *sm; |
| 264 |
int lvl; |
| 265 |
{ |
| 266 |
QUADTREE qt; |
| 267 |
int i; |
| 268 |
FVECT t0,t1,t2; |
| 269 |
STREE *st; |
| 270 |
|
| 271 |
|
| 272 |
if (lvl < 0) |
| 273 |
return; |
| 274 |
st = SM_LOCATOR(sm); |
| 275 |
glPushAttrib(GL_LIGHTING_BIT); |
| 276 |
glShadeModel(GL_FLAT); |
| 277 |
glBegin(GL_TRIANGLES); |
| 278 |
for(i=0; i < ST_NUM_ROOT_NODES; i++) |
| 279 |
{ |
| 280 |
qt = ST_ROOT_QT(st,i); |
| 281 |
qtRender_level(qt,ST_NTH_V(st,i,0),ST_NTH_V(st,i,1),ST_NTH_V(st,i,2), |
| 282 |
sm,lvl); |
| 283 |
} |
| 284 |
glEnd(); |
| 285 |
glPopAttrib(); |
| 286 |
} |
| 287 |
|
| 288 |
|
| 289 |
smRender_stree(sm, qual) /* render some quadtree triangles */ |
| 290 |
SM *sm; |
| 291 |
int qual; |
| 292 |
{ |
| 293 |
int i, n,ntarget; |
| 294 |
int lvlcnt[QT_MAX_LEVELS]; |
| 295 |
STREE *st; |
| 296 |
int4 *active_flag; |
| 297 |
if (qual <= 0) |
| 298 |
return; |
| 299 |
/* compute rendering target */ |
| 300 |
ntarget = 0; |
| 301 |
|
| 302 |
active_flag = SM_NTH_FLAGS(sm,T_ACTIVE_FLAG); |
| 303 |
for(n=((SM_NUM_TRI(sm)+31)>>5) +1; --n;) |
| 304 |
if(active_flag[n]) |
| 305 |
for(i=0; i < 32; i++) |
| 306 |
if(active_flag[n] & (1L << i)) |
| 307 |
ntarget++; |
| 308 |
|
| 309 |
ntarget = ntarget*qual/MAXQUALITY; |
| 310 |
if (!ntarget) |
| 311 |
return; |
| 312 |
for (i = QT_MAX_LEVELS; i--; ) |
| 313 |
lvlcnt[i] = 0; |
| 314 |
|
| 315 |
st = SM_LOCATOR(sm); |
| 316 |
for(i=0; i < ST_NUM_ROOT_NODES;i++) |
| 317 |
stCount_level_leaves(lvlcnt, ST_ROOT_QT(st,i)); |
| 318 |
|
| 319 |
for (ntarget -= lvlcnt[i=0]; i < QT_MAX_LEVELS-1; ntarget -= lvlcnt[++i]) |
| 320 |
if (ntarget < lvlcnt[i+1]) |
| 321 |
break; |
| 322 |
/* compute and render target level */ |
| 323 |
smRender_stree_level(sm,i); |
| 324 |
} |
| 325 |
|
| 326 |
|
| 327 |
|
| 328 |
#define render_tri(v0,v1,v2,rgb0,rgb1,rgb2) \ |
| 329 |
{glColor3ub(rgb0[0],rgb0[1],rgb0[2]); glVertex3fv(v0); \ |
| 330 |
glColor3ub(rgb1[0],rgb1[1],rgb1[2]); glVertex3fv(v1); \ |
| 331 |
glColor3ub(rgb2[0],rgb2[1],rgb2[2]); glVertex3fv(v2);} \ |
| 332 |
|
| 333 |
render_mixed_tri(v0,v1,v2,rgb0,rgb1,rgb2,bg0,bg1,bg2,vp,vc) |
| 334 |
float v0[3],v1[3],v2[3]; |
| 335 |
BYTE rgb0[3],rgb1[3],rgb2[3]; |
| 336 |
int bg0,bg1,bg2; |
| 337 |
FVECT vp,vc; |
| 338 |
{ |
| 339 |
double p[3],d; |
| 340 |
int j,ids[3],cnt; |
| 341 |
int rgb[3]; |
| 342 |
|
| 343 |
/* NOTE:Triangles are defined clockwise:historical relative to spherical |
| 344 |
tris: could change |
| 345 |
*/ |
| 346 |
if(bg0 && bg1 && bg2) |
| 347 |
return; |
| 348 |
|
| 349 |
cnt = 0; |
| 350 |
d = 0.0; |
| 351 |
rgb[0] = rgb[1] = rgb[2] = 0; |
| 352 |
|
| 353 |
if(!bg0) |
| 354 |
{ |
| 355 |
rgb[0] += rgb0[0]; |
| 356 |
rgb[1] += rgb0[1]; |
| 357 |
rgb[2] += rgb0[2]; |
| 358 |
cnt++; |
| 359 |
d += DIST(vp,v0); |
| 360 |
} |
| 361 |
if(!bg1) |
| 362 |
{ |
| 363 |
rgb[0] += rgb1[0]; |
| 364 |
rgb[1] += rgb1[1]; |
| 365 |
rgb[2] += rgb1[2]; |
| 366 |
cnt++; |
| 367 |
d += DIST(vp,v1); |
| 368 |
} |
| 369 |
if(!bg2) |
| 370 |
{ |
| 371 |
rgb[0] += rgb2[0]; |
| 372 |
rgb[1] += rgb2[1]; |
| 373 |
rgb[2] += rgb2[2]; |
| 374 |
cnt++; |
| 375 |
d += DIST(vp,v2); |
| 376 |
} |
| 377 |
if(cnt > 1) |
| 378 |
{ |
| 379 |
rgb[0]/=cnt; rgb[1]/=cnt; rgb[2]/=cnt; |
| 380 |
d /= (double)cnt; |
| 381 |
} |
| 382 |
if(bg0) |
| 383 |
{ |
| 384 |
glColor3ub(rgb[0],rgb[1],rgb[2]); |
| 385 |
VSUB(p,v0,vc); |
| 386 |
p[0] *= d; |
| 387 |
p[1] *= d; |
| 388 |
p[2] *= d; |
| 389 |
VADD(p,p,vc); |
| 390 |
glVertex3dv(p); |
| 391 |
} |
| 392 |
else |
| 393 |
{ |
| 394 |
glColor3ub(rgb0[0],rgb0[1],rgb0[2]); |
| 395 |
glVertex3fv(v0); |
| 396 |
} |
| 397 |
if(bg1) |
| 398 |
{ |
| 399 |
glColor3ub(rgb[0],rgb[1],rgb[2]); |
| 400 |
VSUB(p,v1,vc); |
| 401 |
p[0] *= d; |
| 402 |
p[1] *= d; |
| 403 |
p[2] *= d; |
| 404 |
VADD(p,p,vc); |
| 405 |
glVertex3dv(p); |
| 406 |
} |
| 407 |
else |
| 408 |
{ |
| 409 |
glColor3ub(rgb1[0],rgb1[1],rgb1[2]); |
| 410 |
glVertex3fv(v1); |
| 411 |
} |
| 412 |
if(bg2) |
| 413 |
{ |
| 414 |
glColor3ub(rgb[0],rgb[1],rgb[2]); |
| 415 |
VSUB(p,v2,vc); |
| 416 |
p[0] *= d; |
| 417 |
p[1] *= d; |
| 418 |
p[2] *= d; |
| 419 |
VADD(p,p,vc); |
| 420 |
glVertex3dv(p); |
| 421 |
} |
| 422 |
else |
| 423 |
{ |
| 424 |
glColor3ub(rgb2[0],rgb2[1],rgb2[2]); |
| 425 |
glVertex3fv(v2); |
| 426 |
} |
| 427 |
|
| 428 |
} |
| 429 |
|
| 430 |
render_bg_tri(v0,v1,v2,rgb0,rgb1,rgb2,vp,vc,d) |
| 431 |
float v0[3],v1[3],v2[3]; |
| 432 |
BYTE rgb0[3],rgb1[3],rgb2[3]; |
| 433 |
FVECT vp,vc; |
| 434 |
double d; |
| 435 |
{ |
| 436 |
double p[3]; |
| 437 |
|
| 438 |
glColor3ub(rgb0[0],rgb0[1],rgb0[2]); |
| 439 |
VSUB(p,v0,vc); |
| 440 |
if(dev_zmin >= 0.99) |
| 441 |
{ |
| 442 |
p[0] *= d; |
| 443 |
p[1] *= d; |
| 444 |
p[2] *= d; |
| 445 |
} |
| 446 |
VADD(p,p,vp); |
| 447 |
glVertex3dv(p); |
| 448 |
|
| 449 |
glColor3ub(rgb1[0],rgb1[1],rgb1[2]); |
| 450 |
VSUB(p,v1,vc); |
| 451 |
if(dev_zmin >= 0.99) |
| 452 |
{ |
| 453 |
p[0] *= d; |
| 454 |
p[1] *= d; |
| 455 |
p[2] *= d; |
| 456 |
} |
| 457 |
VADD(p,p,vp); |
| 458 |
glVertex3dv(p); |
| 459 |
|
| 460 |
|
| 461 |
glColor3ub(rgb2[0],rgb2[1],rgb2[2]); |
| 462 |
VSUB(p,v2,vc); |
| 463 |
if(dev_zmin >= 0.99) |
| 464 |
{ |
| 465 |
p[0] *= d; |
| 466 |
p[1] *= d; |
| 467 |
p[2] *= d; |
| 468 |
} |
| 469 |
VADD(p,p,vp); |
| 470 |
glVertex3dv(p); |
| 471 |
|
| 472 |
} |
| 473 |
|
| 474 |
smRender_mesh(sm,vp) |
| 475 |
SM *sm; |
| 476 |
FVECT vp; |
| 477 |
{ |
| 478 |
int i,n,bg0,bg1,bg2; |
| 479 |
double d; |
| 480 |
int v0_id,v1_id,v2_id; |
| 481 |
TRI *tri; |
| 482 |
float (*wp)[3]; |
| 483 |
BYTE (*rgb)[3]; |
| 484 |
int4 *active_flag,*bg_flag; |
| 485 |
|
| 486 |
wp = SM_WP(sm); |
| 487 |
rgb =SM_RGB(sm); |
| 488 |
d = (dev_zmin+dev_zmax)/2.0; |
| 489 |
glPushAttrib(GL_DEPTH_BUFFER_BIT); |
| 490 |
|
| 491 |
/* First draw background polygons */ |
| 492 |
glDisable(GL_DEPTH_TEST); |
| 493 |
glBegin(GL_TRIANGLES); |
| 494 |
|
| 495 |
active_flag = SM_NTH_FLAGS(sm,T_ACTIVE_FLAG); |
| 496 |
bg_flag = SM_NTH_FLAGS(sm,T_BG_FLAG); |
| 497 |
for(n=((SM_NUM_TRI(sm)+31)>>5) +1; --n;) |
| 498 |
if(active_flag[n] & bg_flag[n]) |
| 499 |
for(i=0; i < 32; i++) |
| 500 |
if(active_flag[n] & bg_flag[n] & (1L << i)) |
| 501 |
{ |
| 502 |
tri = SM_NTH_TRI(sm,(n<<5)+i); |
| 503 |
v0_id = T_NTH_V(tri,0); |
| 504 |
v1_id = T_NTH_V(tri,1); |
| 505 |
v2_id = T_NTH_V(tri,2); |
| 506 |
render_bg_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id],rgb[v1_id], |
| 507 |
rgb[v2_id],vp,SM_VIEW_CENTER(sm),d); |
| 508 |
} |
| 509 |
glEnd(); |
| 510 |
|
| 511 |
glEnable(GL_DEPTH_TEST); |
| 512 |
glBegin(GL_TRIANGLES); |
| 513 |
for(n=((SM_NUM_TRI(sm)+31)>>5) +1; --n;) |
| 514 |
if(active_flag[n]) |
| 515 |
for(i=0; i < 32; i++) |
| 516 |
if((active_flag[n] & (1L << i)) && !(bg_flag[n] & (1L << i))) |
| 517 |
{ |
| 518 |
tri = SM_NTH_TRI(sm,(n<<5)+i); |
| 519 |
v0_id = T_NTH_V(tri,0); |
| 520 |
v1_id = T_NTH_V(tri,1); |
| 521 |
v2_id = T_NTH_V(tri,2); |
| 522 |
bg0 = SM_DIR_ID(sm,v0_id) || SM_BASE_ID(sm,v0_id); |
| 523 |
bg1 = SM_DIR_ID(sm,v1_id) || SM_BASE_ID(sm,v1_id); |
| 524 |
bg2 = SM_DIR_ID(sm,v2_id) || SM_BASE_ID(sm,v2_id); |
| 525 |
if(!(bg0 || bg1 || bg2)) |
| 526 |
render_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id],rgb[v1_id], |
| 527 |
rgb[v2_id]) |
| 528 |
else |
| 529 |
render_mixed_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id], |
| 530 |
rgb[v1_id],rgb[v2_id],bg0,bg1,bg2,vp,SM_VIEW_CENTER(sm)); |
| 531 |
} |
| 532 |
glEnd(); |
| 533 |
|
| 534 |
glPopAttrib(); |
| 535 |
} |
| 536 |
|
| 537 |
int |
| 538 |
compare_tri_depths(T_DEPTH *td1,T_DEPTH *td2) |
| 539 |
{ |
| 540 |
double d; |
| 541 |
|
| 542 |
d = td2->depth-td1->depth; |
| 543 |
|
| 544 |
if(d > 0.0) |
| 545 |
return(1); |
| 546 |
if(d < 0.0) |
| 547 |
return(-1); |
| 548 |
|
| 549 |
return(0); |
| 550 |
|
| 551 |
} |
| 552 |
|
| 553 |
#ifdef DEBUG |
| 554 |
#define freebuf(b) tempbuf(-1) |
| 555 |
#endif |
| 556 |
|
| 557 |
|
| 558 |
char * |
| 559 |
tempbuf(len) /* get a temporary buffer */ |
| 560 |
unsigned len; |
| 561 |
{ |
| 562 |
extern char *malloc(), *realloc(); |
| 563 |
static char *tempbuf = NULL; |
| 564 |
static unsigned tempbuflen = 0; |
| 565 |
|
| 566 |
#ifdef DEBUG |
| 567 |
static int in_use=FALSE; |
| 568 |
|
| 569 |
if(len == -1) |
| 570 |
{ |
| 571 |
in_use = FALSE; |
| 572 |
return(NULL); |
| 573 |
} |
| 574 |
if(in_use) |
| 575 |
{ |
| 576 |
eputs("Buffer in use:cannot allocate:tempbuf()\n"); |
| 577 |
return(NULL); |
| 578 |
} |
| 579 |
#endif |
| 580 |
if (len > tempbuflen) { |
| 581 |
if (tempbuflen > 0) |
| 582 |
tempbuf = realloc(tempbuf, len); |
| 583 |
else |
| 584 |
tempbuf = malloc(len); |
| 585 |
tempbuflen = tempbuf==NULL ? 0 : len; |
| 586 |
} |
| 587 |
#ifdef DEBUG |
| 588 |
in_use = TRUE; |
| 589 |
#endif |
| 590 |
return(tempbuf); |
| 591 |
} |
| 592 |
|
| 593 |
smOrder_new_tris(sm,vp,td) |
| 594 |
SM *sm; |
| 595 |
FVECT vp; |
| 596 |
T_DEPTH *td; |
| 597 |
{ |
| 598 |
int n,i,j,tcnt,v; |
| 599 |
TRI *tri; |
| 600 |
double d,min_d; |
| 601 |
FVECT diff; |
| 602 |
int4 *new_flag,*bg_flag; |
| 603 |
|
| 604 |
tcnt=0; |
| 605 |
new_flag = SM_NTH_FLAGS(sm,T_NEW_FLAG); |
| 606 |
bg_flag = SM_NTH_FLAGS(sm,T_BG_FLAG); |
| 607 |
for(n=((SM_NUM_TRI(sm)+31)>>5) +1; --n;) |
| 608 |
if(new_flag[n] & ~bg_flag[n]) |
| 609 |
for(i=0; i < 32; i++) |
| 610 |
if(new_flag[n] & (1L << i) & ~bg_flag[n]) |
| 611 |
{ |
| 612 |
tri = SM_NTH_TRI(sm,(n<<5)+i); |
| 613 |
td[tcnt].tri = (n << 5)+i; |
| 614 |
min_d = -1; |
| 615 |
for(j=0;j < 3;j++) |
| 616 |
{ |
| 617 |
v = T_NTH_V(tri,j); |
| 618 |
if(!SM_BG_SAMPLE(sm,v)) |
| 619 |
{ |
| 620 |
VSUB(diff,SM_NTH_WV(sm,v),vp); |
| 621 |
d = DOT(diff,diff); |
| 622 |
if(min_d == -1 || d < min_d) |
| 623 |
min_d = d; |
| 624 |
} |
| 625 |
} |
| 626 |
td[tcnt++].depth = min_d; |
| 627 |
} |
| 628 |
td[tcnt].tri = -1; |
| 629 |
if(tcnt) |
| 630 |
qsort((void *)td,tcnt,sizeof(T_DEPTH),compare_tri_depths); |
| 631 |
} |
| 632 |
|
| 633 |
|
| 634 |
smUpdate_Rendered_mesh(sm,vp,clr) |
| 635 |
SM *sm; |
| 636 |
FVECT vp; |
| 637 |
int clr; |
| 638 |
{ |
| 639 |
int i,n,v0_id,v1_id,v2_id,bg0,bg1,bg2; |
| 640 |
GLint depth_test; |
| 641 |
double d; |
| 642 |
TRI *tri; |
| 643 |
float (*wp)[3]; |
| 644 |
BYTE (*rgb)[3]; |
| 645 |
int4 *new_flag,*bg_flag; |
| 646 |
T_DEPTH *td = NULL; |
| 647 |
/* For all of the NEW triangles (since last update): assume |
| 648 |
ACTIVE. Go through and sort on depth value (from vp). Turn |
| 649 |
Depth Buffer test off and render back-front |
| 650 |
*/ |
| 651 |
if(!EQUAL_VEC3(SM_VIEW_CENTER(sm),vp)) |
| 652 |
{ |
| 653 |
/* Must depth sort if view points do not coincide */ |
| 654 |
td = (T_DEPTH *)tempbuf(smNew_tri_cnt*sizeof(T_DEPTH)); |
| 655 |
#ifdef DEBUG |
| 656 |
if(!td) |
| 657 |
eputs("Cant create list:wont depth sort:smUpdate_rendered_mesh\n"); |
| 658 |
#endif |
| 659 |
smOrder_new_tris(sm,vp,td); |
| 660 |
} |
| 661 |
wp = SM_WP(sm); |
| 662 |
rgb =SM_RGB(sm); |
| 663 |
/* Turn Depth Test off -- using Painter's algorithm */ |
| 664 |
glPushAttrib(GL_DEPTH_BUFFER_BIT); |
| 665 |
glDepthFunc(GL_ALWAYS); |
| 666 |
d = (dev_zmin+dev_zmax)/2.0; |
| 667 |
|
| 668 |
/* Now render back-to front */ |
| 669 |
/* First render bg triangles */ |
| 670 |
new_flag = SM_NTH_FLAGS(sm,T_NEW_FLAG); |
| 671 |
bg_flag = SM_NTH_FLAGS(sm,T_BG_FLAG); |
| 672 |
glBegin(GL_TRIANGLES); |
| 673 |
for(n=((SM_NUM_TRI(sm)+31)>>5) +1; --n;) |
| 674 |
if(new_flag[n] & bg_flag[n]) |
| 675 |
for(i=0; i < 32; i++) |
| 676 |
if(new_flag[n] & (1L << i) & bg_flag[n] ) |
| 677 |
{ |
| 678 |
tri = SM_NTH_TRI(sm,(n<<5)+i); |
| 679 |
v0_id = T_NTH_V(tri,0); |
| 680 |
v1_id = T_NTH_V(tri,1); |
| 681 |
v2_id = T_NTH_V(tri,2); |
| 682 |
render_bg_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id],rgb[v1_id], |
| 683 |
rgb[v2_id],vp,SM_VIEW_CENTER(sm),d); |
| 684 |
} |
| 685 |
glEnd(); |
| 686 |
|
| 687 |
|
| 688 |
glBegin(GL_TRIANGLES); |
| 689 |
if(!td) |
| 690 |
{ |
| 691 |
for(n=((SM_NUM_TRI(sm)+31)>>5) +1; --n;) |
| 692 |
if(new_flag[n] & ~bg_flag[n]) |
| 693 |
for(i=0; i < 32; i++) |
| 694 |
if(new_flag[n] & (1L << i) & ~bg_flag[n]) |
| 695 |
{ |
| 696 |
tri = SM_NTH_TRI(sm,(n<<5)+i); |
| 697 |
/* Dont need to check for valid tri because flags are |
| 698 |
cleared on delete |
| 699 |
*/ |
| 700 |
v0_id = T_NTH_V(tri,0); |
| 701 |
v1_id = T_NTH_V(tri,1); |
| 702 |
v2_id = T_NTH_V(tri,2); |
| 703 |
bg0 = SM_DIR_ID(sm,v0_id) || SM_BASE_ID(sm,v0_id); |
| 704 |
bg1 = SM_DIR_ID(sm,v1_id) || SM_BASE_ID(sm,v1_id); |
| 705 |
bg2 = SM_DIR_ID(sm,v2_id) || SM_BASE_ID(sm,v2_id); |
| 706 |
if(!(bg0 || bg1 || bg2)) |
| 707 |
render_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id],rgb[v1_id], |
| 708 |
rgb[v2_id]) |
| 709 |
else |
| 710 |
render_mixed_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id], |
| 711 |
rgb[v1_id],rgb[v2_id],bg0,bg1,bg2,vp, |
| 712 |
SM_VIEW_CENTER(sm)); |
| 713 |
} |
| 714 |
} |
| 715 |
else |
| 716 |
{ |
| 717 |
for(i=0; td[i].tri != -1;i++) |
| 718 |
{ |
| 719 |
tri = SM_NTH_TRI(sm,td[i].tri); |
| 720 |
/* Dont need to check for valid tri because flags are |
| 721 |
cleared on delete |
| 722 |
*/ |
| 723 |
v0_id = T_NTH_V(tri,0); |
| 724 |
v1_id = T_NTH_V(tri,1); |
| 725 |
v2_id = T_NTH_V(tri,2); |
| 726 |
bg0 = SM_DIR_ID(sm,v0_id) || SM_BASE_ID(sm,v0_id); |
| 727 |
bg1 = SM_DIR_ID(sm,v1_id) || SM_BASE_ID(sm,v1_id); |
| 728 |
bg2 = SM_DIR_ID(sm,v2_id) || SM_BASE_ID(sm,v2_id); |
| 729 |
if(!(bg0 || bg1 || bg2)) |
| 730 |
render_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id],rgb[v1_id], |
| 731 |
rgb[v2_id]) |
| 732 |
else |
| 733 |
render_mixed_tri(wp[v0_id],wp[v1_id],wp[v2_id],rgb[v0_id], |
| 734 |
rgb[v1_id],rgb[v2_id],bg0,bg1,bg2,vp, |
| 735 |
SM_VIEW_CENTER(sm)); |
| 736 |
} |
| 737 |
#ifdef DEBUG |
| 738 |
freebuf(td); |
| 739 |
#endif |
| 740 |
} |
| 741 |
glEnd(); |
| 742 |
|
| 743 |
/* Restore Depth Test */ |
| 744 |
glPopAttrib(); |
| 745 |
} |
| 746 |
|
| 747 |
/* |
| 748 |
* smUpdate(view, qua) : update OpenGL output geometry for view vp |
| 749 |
* VIEW *view; : desired view |
| 750 |
* int qual; : quality level (percentage on linear time scale) |
| 751 |
* |
| 752 |
* Draw new geometric representation using OpenGL calls. Assume that the |
| 753 |
* view has already been set up and the correct frame buffer has been |
| 754 |
* selected for drawing. The quality level is on a linear scale, where 100% |
| 755 |
* is full (final) quality. It is not necessary to redraw geometry that has |
| 756 |
* been output since the last call to smClean(). (The last view drawn will |
| 757 |
* be view==&odev.v each time.) |
| 758 |
*/ |
| 759 |
smUpdate(view,qual) |
| 760 |
VIEW *view; |
| 761 |
int qual; |
| 762 |
{ |
| 763 |
double d; |
| 764 |
int last_update,t; |
| 765 |
|
| 766 |
if(!smMesh) |
| 767 |
return; |
| 768 |
|
| 769 |
/* If view has moved beyond epsilon from canonical: must rebuild - |
| 770 |
epsilon is calculated as running avg of distance of sample points |
| 771 |
from canonical view: m = 1/(AVG(1/r)): some fraction of this |
| 772 |
*/ |
| 773 |
d = DIST(view->vp,SM_VIEW_CENTER(smMesh)); |
| 774 |
if(qual >= MAXQUALITY && d > SM_ALLOWED_VIEW_CHANGE(smMesh)) |
| 775 |
{ |
| 776 |
/* Re-build the mesh */ |
| 777 |
#ifdef TEST_DRIVER |
| 778 |
odev.v = *view; |
| 779 |
#endif |
| 780 |
mark_tris_in_frustum(view); |
| 781 |
smRebuild_mesh(smMesh,view); |
| 782 |
smClean_notify = TRUE; |
| 783 |
} |
| 784 |
/* This is our final update iff qual==MAXQUALITY and view==&odev.v */ |
| 785 |
last_update = qual>=MAXQUALITY && view==&(odev.v); |
| 786 |
/* Check if we should draw ALL triangles in current frustum */ |
| 787 |
if(smClean_notify || smNew_tri_cnt>SM_SAMPLE_TRIS(smMesh)*SM_INC_PERCENT) |
| 788 |
{ |
| 789 |
#ifdef TEST_DRIVER |
| 790 |
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 791 |
#else |
| 792 |
if (SM_TONE_MAP(smMesh) < SM_NUM_SAMP(smMesh)) |
| 793 |
{ |
| 794 |
tmClearHisto(); |
| 795 |
tmAddHisto(SM_BRT(smMesh),SM_NUM_SAMP(smMesh),1); |
| 796 |
if(tmComputeMapping(0.,0.,0.) != TM_E_OK) |
| 797 |
return; |
| 798 |
tmMapPixels(SM_RGB(smMesh),SM_BRT(smMesh),SM_CHR(smMesh), |
| 799 |
SM_NUM_SAMP(smMesh)); |
| 800 |
} |
| 801 |
#endif |
| 802 |
mark_tris_in_frustum(view); |
| 803 |
if (qual <= (MAXQUALITY*3/4)) |
| 804 |
smRender_stree(smMesh,qual); |
| 805 |
else |
| 806 |
smRender_mesh(smMesh,view->vp); |
| 807 |
#ifdef TEST_DRIVER |
| 808 |
glFlush(); |
| 809 |
glutSwapBuffers(); |
| 810 |
#endif |
| 811 |
} |
| 812 |
/* Do an incremental update instead */ |
| 813 |
else |
| 814 |
{ |
| 815 |
if(!smNew_tri_cnt) |
| 816 |
return; |
| 817 |
#ifdef TEST_DRIVER |
| 818 |
glDrawBuffer(GL_FRONT); |
| 819 |
#else |
| 820 |
t = SM_TONE_MAP(smMesh); |
| 821 |
if(t == 0) |
| 822 |
{ |
| 823 |
tmClearHisto(); |
| 824 |
tmAddHisto(SM_BRT(smMesh),SM_NUM_SAMP(smMesh),1); |
| 825 |
if(tmComputeMapping(0.,0.,0.) != TM_E_OK) |
| 826 |
return; |
| 827 |
} |
| 828 |
tmMapPixels(SM_NTH_RGB(smMesh,t),&SM_NTH_BRT(smMesh,t), |
| 829 |
SM_NTH_CHR(smMesh,t), SM_NUM_SAMP(smMesh)-t); |
| 830 |
|
| 831 |
#endif |
| 832 |
smUpdate_Rendered_mesh(smMesh,view->vp,last_update); |
| 833 |
|
| 834 |
#ifdef TEST_DRIVER |
| 835 |
glDrawBuffer(GL_BACK); |
| 836 |
#endif |
| 837 |
} |
| 838 |
|
| 839 |
SM_TONE_MAP(smMesh) = SM_NUM_SAMP(smMesh); |
| 840 |
|
| 841 |
if (last_update) |
| 842 |
{ |
| 843 |
smClean_notify = FALSE; |
| 844 |
smNew_tri_cnt = 0; |
| 845 |
smClear_flags(smMesh,T_NEW_FLAG); |
| 846 |
qtCache_init(0); |
| 847 |
} |
| 848 |
|
| 849 |
} |
| 850 |
|
| 851 |
|
| 852 |
|
| 853 |
|
| 854 |
|
| 855 |
|
| 856 |
|
| 857 |
|
