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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Routines for drawing samples using depth buffer checks. |
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*/ |
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#include "standard.h" |
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#include <sys/types.h> |
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#include <GL/glx.h> |
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#include <GL/glu.h> |
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#ifndef SFREEFRAC |
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#define SFREEFRAC 0.2 /* fraction to free at a time */ |
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#endif |
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#ifndef REDRAWTHRESH |
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#define REDRAWTHRESH 10240 /* number of samples for dissolve */ |
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#endif |
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#ifndef MAXFAN |
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#define MAXFAN 32 /* maximum arms in a triangle fan */ |
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#endif |
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if (odNViews > 0) { /* deallocate view structures */ |
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for (i = odNViews; i--; ) { |
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free((char *)odView[i].bmap); |
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free((char *)odView[i].pmap); |
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free((void *)odView[i].bmap); |
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free((void *)odView[i].pmap); |
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if (odView[i].emap != NULL) |
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free((char *)odView[i].emap); |
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free((void *)odView[i].emap); |
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} |
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free((char *)odView); |
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free((void *)odView); |
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odView = NULL; |
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odNViews = 0; |
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} |
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odView[i].bmap[j].nused = 0; |
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} |
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odView[i].snext = nextsamp; |
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odView[i].n2redraw = 0; |
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} |
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CLR4ALL(odS.redraw, odS.nsamp); /* clear redraw flags */ |
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for (i = odS.nsamp; i--; ) { /* clear values */ |
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if (CHK4(odView[vn].pmap, vh*odView[vn].hhi + hh)) |
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i = bp->first + bp->nsamp; |
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else |
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i = -1; |
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i = 0; |
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while (i-- > bp->first) |
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if (hh == odS.ip[i][0] && vh == odS.ip[i][1]) { /* found it! */ |
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/* search free list for it */ |
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bp->nused++; |
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goto gotit; |
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} |
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if (prox >= 0.999*odS.closeness(i)) |
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if (prox >= 0.99*odS.closeness(i)) |
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return(-1); /* previous sample is fine */ |
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goto gotit; |
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} |
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DCHECK(i>=-1, WARNING, "pixel in presence map not found in block"); |
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if (bp->free != ENDFREE) { /* allocate from free list */ |
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i = bp->free; |
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if (odS.ip[i][0] >= 0 & odS.ip[i][1] >= 0) |
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else /* else map it now */ |
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tmMapPixels(odS.rgb[id], &odS.brt[id], odS.chr[id], 1); |
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SET4(odS.redraw, id); /* mark for redraw */ |
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odView[i].n2redraw++; |
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} |
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} |
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for (i = odS.nsamp; i--; ) |
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if (odS.ip[i][0] >= 0) |
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SET4(odS.redraw, i); |
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/* not right, but not important */ |
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for (i = 0; i < odNViews; i++) |
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odView[i].n2redraw = odView[i].snext - odView[i].sfirst; |
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} |
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for (j = vmin; j <= vmax; j++) { |
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bp = odView[vn].bmap + j*odView[vn].hlow + i; |
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for (k = bp->nsamp; k--; ) |
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if (odS.ip[bp->first+k][0] >= 0) |
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if (odS.ip[bp->first+k][0] >= 0) { |
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SET4(odS.redraw, bp->first+k); |
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odView[vn].n2redraw++; |
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} |
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} |
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} |
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if (vn<0 | vn>=odNViews) |
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return; /* too late -- they're gone! */ |
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if (odView[vn].emap != NULL) |
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free((char *)odView[vn].emap); |
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free((void *)odView[vn].emap); |
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odView[vn].emap = NULL; |
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odView[vn].dmap = NULL; |
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return; |
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odUpdate(vn) /* update this view */ |
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int vn; |
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{ |
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register int i, j; |
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static short primes[] = {9431,6803,4177,2659,1609,887,587,251,47,1}; |
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int myprime; |
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register int i, n; |
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DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
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"bad view number in odUpdate"); |
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return; |
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needmapping &= ~NEWRGB; |
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} |
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/* this code segment was too slow */ |
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#if 0 |
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for (i = odView[vn].sfirst; i < odView[vn].snext; i++) |
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if (odView[vn].n2redraw <= 0) |
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return; |
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#if REDRAWTHRESH |
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if (odView[vn].n2redraw < REDRAWTHRESH) |
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goto quickdraw; |
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/* pick a good prime step size */ |
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n = odView[vn].snext - odView[vn].sfirst; |
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for (i = 0; primes[i]<<5 >= n; i++) |
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; |
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while ((myprime = primes[i++]) > 1) |
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if (n % myprime) |
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break; |
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/* dissolve in new samples */ |
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for (i = odView[vn].sfirst; n-- > 0; i += myprime) { |
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if (i >= odView[vn].snext) |
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i -= odView[vn].snext - odView[vn].sfirst; |
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if (CHK4(odS.redraw, i)) { |
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odDrawSamp(vn, i); |
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CLR4(odS.redraw, i); |
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} |
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#else |
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/* redraw samples at beginning */ |
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for (i = odView[vn].sfirst; i < odView[vn].sfirst+31; i++) |
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} |
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odView[vn].n2redraw = 0; |
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return; |
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quickdraw: /* quicker sparse flag checking */ |
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#endif |
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/* redraw samples at end */ |
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for (i = odView[vn].snext-31; i < odView[vn].snext; i++) |
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if (CHK4(odS.redraw, i)) { |
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odDrawSamp(vn, i); |
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CLR4(odS.redraw, i); |
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} |
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/* faster flag checks in middle */ |
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for (j = odView[vn].snext>>5; j-- > (odView[vn].sfirst+0x1f)>>5; ) |
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for (i = 0; odS.redraw[j]; i++) /* skips faster */ |
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if (odS.redraw[j] & 1L<<i) { |
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odDrawSamp(vn, (j<<5)+i); |
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odS.redraw[j] &= ~(1L<<i); |
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for (n = odView[vn].snext>>5; n-- > (odView[vn].sfirst+0x1f)>>5; ) |
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for (i = 0; odS.redraw[n]; i++) /* skips faster */ |
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if (odS.redraw[n] & 1L<<i) { |
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odDrawSamp(vn, (n<<5)+i); |
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odS.redraw[n] &= ~(1L<<i); |
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} |
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/* redraw samples at end */ |
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for (i = odView[vn].snext-31; i < odView[vn].snext; i++) |
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/* redraw samples at beginning */ |
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for (i = odView[vn].sfirst; i < odView[vn].sfirst+31; i++) |
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if (CHK4(odS.redraw, i)) { |
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odDrawSamp(vn, i); |
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CLR4(odS.redraw, i); |
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} |
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#endif |
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odView[vn].n2redraw = 0; |
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} |
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register int i; |
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DCHECK(sz > 1, CONSISTENCY, "super-unary size in make_arms"); |
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na = MAXFAN*sz*sz + 0.5; /* keep area constant */ |
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na = MAXFAN*sz + 0.5; /* keep arc length constant */ |
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if (na < MINFAN) na = MINFAN; |
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hrad = FANSIZE*sz*vp->hhi/vp->hlow; |
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vrad = FANSIZE*sz*vp->vhi/vp->vlow; |