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#include <GL/glx.h> |
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#include <GL/glu.h> |
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#include "random.h" |
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#include "rhd_odraw.h" |
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#ifndef DEPTHEPS |
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DCHECK(count<=0 | nextsamp>=n, |
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CONSISTENCY, "counter botch in odInit"); |
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if (!i) count = j; |
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odView[i].sfirst = nextsamp; |
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while (j--) { /* initialize blocks & free lists */ |
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odView[i].bmap[j].pthresh = FHUGE; |
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odView[i].bmap[j].first = k = nextsamp; |
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odS.nextfree(k-1) = ENDFREE; |
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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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} |
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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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} |
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odRedrawAll() /* mark all samples for redraw */ |
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{ |
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register int i; |
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|
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if ((needmapping&(NEWMAP|NEWRGB)) == (NEWMAP|NEWRGB)) |
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return; /* will be called later, anyway */ |
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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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} |
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|
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|
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odRedraw(vn, hmin, vmin, hmax, vmax) /* redraw view region */ |
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int vn, hmin, vmin, hmax, vmax; |
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{ |
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if (needmapping & NEWMAP) { |
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if (needmapping & NEWHIST) |
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tmClearHisto(); |
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needmapping &= ~NEWHIST; |
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if (tmAddHisto(odS.brt,odS.nsamp,1) != TM_E_OK) |
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return; |
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if (tmComputeMapping(0.,0.,0.) != TM_E_OK) |
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return; |
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for (i = odS.nsamp; i--; ) /* redraw all */ |
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if (odS.ip[i][0] >= 0) |
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SET4(odS.redraw, i); |
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needmapping &= ~NEWMAP; |
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odRedrawAll(); /* redraw everything */ |
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} |
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if (tmMapPixels(odS.rgb,odS.brt,odS.chr,odS.nsamp) != TM_E_OK) |
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return; |
459 |
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needmapping = 0; /* reset flag */ |
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needmapping &= ~NEWRGB; |
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} |
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/* draw samples flagged for redraw */ |
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for (j = FL4NELS(odS.nsamp); j--; ) |
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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 (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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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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} |
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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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#endif |
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} |
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/* this turned out to be unnecessary */ |
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#if 0 |
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static |
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clip_end(p, o, vp) /* clip line segment to view */ |
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double sz; |
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{ |
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int na, dv; |
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double hrad, vrad, phi0, phi; |
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double hrad, vrad, phi; |
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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; |
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if (hrad*vrad < 2.25) |
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hrad = vrad = 1.5; |
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phi0 = (2.*PI) * frandom(); |
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dv = OMAXDEPTH*sz + 0.5; |
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for (i = 0; i < na; i++) { |
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phi = phi0 + (2.*PI)*i/na; |
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phi = (2.*PI)*i/na; |
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ar[i][0] = cp[0] + tcos(phi)*hrad + 0.5; |
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ar[i][1] = cp[1] + tsin(phi)*vrad + 0.5; |
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ar[i][2] = dv; |
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n = rise + run; |
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while (n--) /* run out arm, checking depth */ |
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if (run2 > rise2) { |
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if (depthchange(vp, x, y, x+xstep, y)) |
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break; |
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x += xstep; |
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rise2 += rise; |
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} else { |
566 |
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if (depthchange(vp, x, y, x, y+ystep)) |
597 |
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if (depthchange(vp, x-xstep, y, x, y)) |
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break; |
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} else { |
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y += ystep; |
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run2 += run; |
602 |
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if (depthchange(vp, x, y-ystep, x, y)) |
603 |
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break; |
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} |
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if (n < 0) /* found something? */ |
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return; |
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} |
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static int |
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blockedge(vp, bi0, bi1) /* check for edge between blocks? */ |
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register struct ODview *vp; |
630 |
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register int bi0, bi1; |
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{ |
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if (bi1 == bi0) |
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return(0); /* same block */ |
634 |
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if (bi1 < 0) |
635 |
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return(1); /* end off view */ |
636 |
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if (CHK4(vp->emap, bi1)) |
637 |
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return(1); /* end block has edges */ |
638 |
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if (bi1 == bi0+1 || bi1 == bi0-1 || |
639 |
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bi1 == bi0+vp->hlow || bi1 == bi0-vp->hlow) |
640 |
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return(0); /* end in adjacent block -- no edges */ |
641 |
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return(1); /* conservative for rarer case */ |
642 |
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} |
643 |
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|
644 |
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|
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odDrawSamp(vn, id) /* draw view sample */ |
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int vn; |
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register int id; |
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{ |
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GLshort arm[MAXFAN][3]; |
650 |
< |
int narms, blockindex, bi1; |
650 |
> |
int narms, blockindex; |
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register struct ODview *vp; |
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double size; |
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int home_edges; |
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if (vp->emap != NULL) { /* check for edge collisions */ |
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home_edges = CHK4(vp->emap, blockindex); |
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for (i = 0; i < narms; i++) |
667 |
< |
/* the following test is flawed, because we could |
668 |
< |
* be passing through a block on a diagonal run */ |
617 |
< |
if (home_edges || |
618 |
< |
( (bi1 = getblock(vp, arm[i][0], arm[i][1])) |
619 |
< |
!= blockindex && |
620 |
< |
(bi1 < 0 || CHK4(vp->emap, bi1)) )) |
667 |
> |
if (home_edges || blockedge(vp, blockindex, |
668 |
> |
getblock(vp, arm[i][0], arm[i][1]))) |
669 |
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clip_edge(arm[i], odS.ip[id], vp); |
670 |
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} |
671 |
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/* draw triangle fan */ |