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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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/* |
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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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#include "random.h" |
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#include "rhd_odraw.h" |
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#ifndef DEPTHEPS |
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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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|
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#define NEWMAP 01 /* need to recompute mapping */ |
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#define NEWRGB 02 /* need to remap RGB values */ |
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#define NEWHIST 04 /* clear histogram as well */ |
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|
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struct ODview *odView; /* our view list */ |
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int odNViews; /* number of views in our list */ |
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#define SAMP32 (32*(2*sizeof(short)+sizeof(union ODfunion)+sizeof(TMbright)+\ |
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< |
6*sizeof(BYTE))+sizeof(int4)) |
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> |
6*sizeof(BYTE))+sizeof(int32)) |
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|
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int |
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odInit(n) /* initialize drawing routines */ |
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int n; |
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> |
static int sampcmp(const void *s0, const void *s1); |
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> |
static int odAllocBlockSamp(int vn, int hh, int vh, double prox); |
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> |
static int make_arms(GLshort ar[MAXFAN][3], short cp[2], struct ODview *vp, |
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double sz); |
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> |
static int depthchange(struct ODview *vp, int x0, int y0, int x1, int y1); |
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> |
static void clip_edge(GLshort p[3], short o[2], struct ODview *vp); |
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> |
static int getblock(struct ODview *vp, int h, int v); |
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> |
static int blockedge(struct ODview *vp, int bi0, int bi1); |
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static void odDrawSamp(int vn, int id); |
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|
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|
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extern int |
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odInit( /* initialize drawing routines */ |
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int n |
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) |
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{ |
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int nbytes, i, j, k, nextsamp, count, blockdiv; |
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int res[2]; |
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|
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if (odNViews) { /* deallocate view structures */ |
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< |
for (i = 0; i < odNViews; i++) { |
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< |
free((char *)odView[i].bmap); |
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> |
if (odNViews > 0) { /* deallocate view structures */ |
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> |
for (i = odNViews; i--; ) { |
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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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for (i = 1024; nbytes > i-8; i <<= 1) |
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; |
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n = (i-8)/SAMP32 * 32; |
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< |
needmapping = NEWMAP; |
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> |
needmapping = NEWHIST; |
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} |
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if (n != odS.nsamp) { /* (re)allocate sample array */ |
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if (odS.nsamp) |
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return(0); |
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/* assign larger alignment types earlier */ |
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odS.f = (union ODfunion *)odS.base; |
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< |
odS.redraw = (int4 *)(odS.f + n); |
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> |
odS.redraw = (int32 *)(odS.f + n); |
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odS.ip = (short (*)[2])(odS.redraw + n/32); |
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odS.brt = (TMbright *)(odS.ip + n); |
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odS.chr = (BYTE (*)[3])(odS.brt + n); |
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if (blockdiv < 8) blockdiv = 8; |
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nextsamp = 0; count /= blockdiv*blockdiv; /* # blocks */ |
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while (i--) { /* initialize each view */ |
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odView[i].emap = NULL; |
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odView[i].dmap = NULL; |
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dev_auxview(i, res); |
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odView[i].hhi = res[0]; |
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odView[i].hlow = (res[0] + blockdiv/2) / blockdiv; |
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odView[i].vhi = res[1]; |
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odView[i].vlow = (res[1] + blockdiv/2) / blockdiv; |
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if (odView[i].vlow < 1) odView[i].vlow = 1; |
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+ |
odView[i].emap = NULL; |
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+ |
odView[i].dmap = NULL; |
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+ |
odView[i].pmap = (int32 *)calloc(FL4NELS(res[0]*res[1]), |
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+ |
sizeof(int32)); |
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+ |
if (odView[i].pmap == NULL) |
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+ |
return(0); |
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j = odView[i].hlow*odView[i].vlow; |
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odView[i].bmap = (struct ODblock *)malloc( |
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j * sizeof(struct ODblock)); |
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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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< |
while (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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nextsamp += odView[i].bmap[j].nsamp = |
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(n - nextsamp)/count--; |
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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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+ |
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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> |
for (i = odS.nsamp; i--; ) { /* clear values */ |
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odS.ip[i][0] = odS.ip[i][1] = -1; |
| 162 |
+ |
odS.brt[i] = TM_NOBRT; |
| 163 |
+ |
} |
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+ |
needmapping |= NEWMAP; /* compute new map on update */ |
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return(odS.nsamp); /* return number of samples */ |
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} |
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|
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|
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int |
| 172 |
< |
sampcmp(s0, s1) /* sample order, descending proximity */ |
| 173 |
< |
int *s0, *s1; |
| 172 |
> |
sampcmp( /* sample order, descending proximity */ |
| 173 |
> |
const void *s0, |
| 174 |
> |
const void *s1 |
| 175 |
> |
) |
| 176 |
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{ |
| 177 |
< |
register double diff = odS.closeness(*s1) - odS.closeness(*s0); |
| 177 |
> |
register double diff = odS.closeness(*(int*)s1) - odS.closeness(*(int*)s0); |
| 178 |
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|
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return (diff > FTINY ? 1 : diff < -FTINY ? -1 : 0); |
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} |
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|
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|
| 183 |
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int |
| 184 |
< |
odAllocBlockSamp(vn, hl, vl) /* allocate sample from block */ |
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< |
int vn, hl, vl; |
| 184 |
> |
odAllocBlockSamp( /* allocate sample from block */ |
| 185 |
> |
int vn, |
| 186 |
> |
int hh, |
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> |
int vh, |
| 188 |
> |
double prox |
| 189 |
> |
) |
| 190 |
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{ |
| 191 |
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int si[SAMPSPERBLOCK+SAMPSPERBLOCK/4]; |
| 192 |
+ |
int hl, vl; |
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VIEW *vw; |
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FVECT ro, rd; |
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int res[2]; |
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register struct ODblock *bp; |
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< |
register int i; |
| 197 |
< |
|
| 196 |
> |
register int i, j; |
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> |
/* get block */ |
| 198 |
> |
hl = hh*odView[vn].hlow/odView[vn].hhi; |
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> |
vl = vh*odView[vn].vlow/odView[vn].vhi; |
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bp = odView[vn].bmap + vl*odView[vn].hlow + hl; |
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< |
if (bp->free != ENDFREE) { /* check free list first */ |
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> |
if (prox > bp->pthresh) |
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> |
return(-1); /* worse than free list occupants */ |
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> |
/* check for duplicate pixel */ |
| 204 |
> |
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 = 0; |
| 208 |
> |
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 */ |
| 211 |
> |
if (i == bp->free) |
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> |
break; /* special case */ |
| 213 |
> |
if (bp->free != ENDFREE) |
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> |
for (j = bp->free; odS.nextfree(j) != ENDFREE; |
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> |
j = odS.nextfree(j)) |
| 216 |
> |
if (odS.nextfree(j) == i) { |
| 217 |
> |
odS.nextfree(j) = |
| 218 |
> |
odS.nextfree(i); |
| 219 |
> |
bp->nused++; |
| 220 |
> |
goto gotit; |
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> |
} |
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> |
if (prox >= 0.99*odS.closeness(i)) |
| 223 |
> |
return(-1); /* previous sample is fine */ |
| 224 |
> |
goto gotit; |
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> |
} |
| 226 |
> |
if (bp->free != ENDFREE) { /* allocate from free list */ |
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|
i = bp->free; |
| 228 |
+ |
if ((odS.ip[i][0] >= 0) & (odS.ip[i][1] >= 0)) |
| 229 |
+ |
CLR4(odView[vn].pmap, odS.ip[i][1]*odView[vn].hhi + |
| 230 |
+ |
odS.ip[i][0]); |
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bp->free = odS.nextfree(i); |
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bp->nused++; |
| 233 |
< |
return(i); |
| 233 |
> |
goto gotit; |
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} |
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DCHECK(bp->nsamp<=0, CONSISTENCY, |
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"no available samples in odAllocBlockSamp"); |
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for (i = bp->nsamp; i--; ) /* figure out which are worse */ |
| 243 |
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si[i] = bp->first + i; |
| 244 |
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qsort((char *)si, bp->nsamp, sizeof(int), sampcmp); |
| 245 |
< |
i = bp->nsamp*SFREEFRAC + .5; /* put them in a list */ |
| 245 |
> |
i = bp->nsamp*SFREEFRAC + .5; /* put them into free list */ |
| 246 |
> |
if (i >= bp->nsamp) i = bp->nsamp-1; /* paranoia */ |
| 247 |
> |
bp->pthresh = odS.closeness(si[i]); /* new proximity threshold */ |
| 248 |
|
while (--i > 0) { |
| 249 |
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odS.nextfree(si[i]) = bp->free; |
| 250 |
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bp->free = si[i]; |
| 251 |
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bp->nused--; |
| 252 |
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} |
| 253 |
< |
return(si[0]); /* return first free sample */ |
| 253 |
> |
i = si[0]; /* use worst sample */ |
| 254 |
> |
CLR4(odView[vn].pmap, odS.ip[i][1]*odView[vn].hhi + odS.ip[i][0]); |
| 255 |
> |
gotit: |
| 256 |
> |
odS.ip[i][0] = hh; |
| 257 |
> |
odS.ip[i][1] = vh; |
| 258 |
> |
odS.closeness(i) = prox; |
| 259 |
> |
SET4(odView[vn].pmap, vh*odView[vn].hhi + hh); |
| 260 |
> |
return(i); |
| 261 |
|
} |
| 262 |
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|
| 263 |
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|
| 264 |
< |
odSample(c, d, p) /* add a sample value */ |
| 265 |
< |
COLR c; |
| 266 |
< |
FVECT d, p; |
| 264 |
> |
extern void |
| 265 |
> |
odSample( /* add a sample value */ |
| 266 |
> |
COLR c, |
| 267 |
> |
FVECT d, |
| 268 |
> |
FVECT p |
| 269 |
> |
) |
| 270 |
|
{ |
| 271 |
|
FVECT disp; |
| 272 |
< |
double d0, d1, h, v; |
| 272 |
> |
double d0, d1, h, v, prox; |
| 273 |
|
register VIEW *vw; |
| 274 |
< |
int hl, vl, hh, vh; |
| 274 |
> |
int hh, vh; |
| 275 |
|
int res[2]; |
| 276 |
|
register int i, id; |
| 277 |
|
|
| 306 |
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(1.+DEPTHEPS)*d0 < d1)) |
| 307 |
|
continue; /* occlusion error */ |
| 308 |
|
} |
| 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; |
| 309 |
|
if (p != NULL) { /* compute closeness (sin^2) */ |
| 310 |
|
d1 = DOT(disp, d); |
| 311 |
< |
odS.closeness(id) = 1. - d1*d1/DOT(disp,disp); |
| 311 |
> |
prox = 1. - d1*d1/DOT(disp,disp); |
| 312 |
|
} else |
| 313 |
< |
odS.closeness(id) = 0.; |
| 313 |
> |
prox = 0.; |
| 314 |
> |
/* allocate sample */ |
| 315 |
> |
id = odAllocBlockSamp(i, hh, vh, prox); |
| 316 |
> |
if (id < 0) |
| 317 |
> |
continue; /* not good enough */ |
| 318 |
|
/* convert color */ |
| 319 |
< |
tmCvColrs(&odS.brt[id], odS.chr[id], c, 1); |
| 319 |
> |
tmCvColrs(tmGlobal, &odS.brt[id], odS.chr[id], (COLR *)c, 1); |
| 320 |
|
if (imm_mode | needmapping) /* if immediate mode */ |
| 321 |
|
needmapping |= NEWRGB; /* map it later */ |
| 322 |
|
else /* else map it now */ |
| 323 |
< |
tmMapPixels(odS.rgb[id], &odS.brt[id], odS.chr[id], 1); |
| 323 |
> |
tmMapPixels(tmGlobal, odS.rgb[id], &odS.brt[id], |
| 324 |
> |
odS.chr[id], 1); |
| 325 |
|
SET4(odS.redraw, id); /* mark for redraw */ |
| 326 |
+ |
odView[i].n2redraw++; |
| 327 |
|
} |
| 328 |
|
} |
| 329 |
|
|
| 330 |
|
|
| 331 |
< |
odRemap() /* recompute tone mapping */ |
| 331 |
> |
extern void |
| 332 |
> |
odRemap( /* recompute tone mapping */ |
| 333 |
> |
int newhist |
| 334 |
> |
) |
| 335 |
|
{ |
| 336 |
|
needmapping |= NEWMAP|NEWRGB; |
| 337 |
+ |
if (newhist) |
| 338 |
+ |
needmapping |= NEWHIST; |
| 339 |
|
} |
| 340 |
|
|
| 341 |
|
|
| 342 |
< |
odRedraw(vn, hmin, vmin, hmax, vmax) /* redraw view region */ |
| 343 |
< |
int vn, hmin, vmin, hmax, vmax; |
| 342 |
> |
extern void |
| 343 |
> |
odRedrawAll(void) /* mark all samples for redraw */ |
| 344 |
|
{ |
| 345 |
+ |
register int i; |
| 346 |
+ |
|
| 347 |
+ |
if ((needmapping&(NEWMAP|NEWRGB)) == (NEWMAP|NEWRGB)) |
| 348 |
+ |
return; /* will be called later, anyway */ |
| 349 |
+ |
for (i = odS.nsamp; i--; ) |
| 350 |
+ |
if (odS.ip[i][0] >= 0) |
| 351 |
+ |
SET4(odS.redraw, i); |
| 352 |
+ |
/* not right, but not important */ |
| 353 |
+ |
for (i = 0; i < odNViews; i++) |
| 354 |
+ |
odView[i].n2redraw = odView[i].snext - odView[i].sfirst; |
| 355 |
+ |
} |
| 356 |
+ |
|
| 357 |
+ |
|
| 358 |
+ |
extern void |
| 359 |
+ |
odRedraw( /* redraw view region */ |
| 360 |
+ |
int vn, |
| 361 |
+ |
int hmin, |
| 362 |
+ |
int vmin, |
| 363 |
+ |
int hmax, |
| 364 |
+ |
int vmax |
| 365 |
+ |
) |
| 366 |
+ |
{ |
| 367 |
|
int i, j; |
| 368 |
|
register struct ODblock *bp; |
| 369 |
|
register int k; |
| 370 |
|
|
| 371 |
< |
if (vn<0 | vn>=odNViews) |
| 371 |
> |
if ((vn<0) | (vn>=odNViews)) |
| 372 |
|
return; |
| 373 |
|
/* check view limits */ |
| 374 |
|
if (hmin < 0) hmin = 0; |
| 375 |
|
if (hmax >= odView[vn].hhi) hmax = odView[vn].hhi-1; |
| 376 |
|
if (vmin < 0) vmin = 0; |
| 377 |
|
if (vmax >= odView[vn].vhi) vmax = odView[vn].vhi-1; |
| 378 |
< |
if (hmax <= hmin | vmax <= vmin) |
| 378 |
> |
if ((hmax <= hmin) | (vmax <= vmin)) |
| 379 |
|
return; |
| 380 |
|
/* convert to low resolution */ |
| 381 |
|
hmin = hmin * odView[vn].hlow / odView[vn].hhi; |
| 387 |
|
for (j = vmin; j <= vmax; j++) { |
| 388 |
|
bp = odView[vn].bmap + j*odView[vn].hlow + i; |
| 389 |
|
for (k = bp->nsamp; k--; ) |
| 390 |
< |
if (odS.ip[bp->first+k][0] >= 0) |
| 390 |
> |
if (odS.ip[bp->first+k][0] >= 0) { |
| 391 |
|
SET4(odS.redraw, bp->first+k); |
| 392 |
+ |
odView[vn].n2redraw++; |
| 393 |
+ |
} |
| 394 |
|
} |
| 395 |
|
} |
| 396 |
|
|
| 397 |
|
|
| 398 |
< |
odDepthMap(vn, dm) /* assign depth map for view */ |
| 399 |
< |
int vn; |
| 400 |
< |
GLfloat *dm; |
| 398 |
> |
extern void |
| 399 |
> |
odDepthMap( /* assign depth map for view */ |
| 400 |
> |
int vn, |
| 401 |
> |
GLfloat *dm |
| 402 |
> |
) |
| 403 |
|
{ |
| 404 |
|
double d0, d1; |
| 405 |
|
int i, j, hmin, hmax, vmin, vmax; |
| 406 |
|
register int k, l; |
| 407 |
|
|
| 306 |
– |
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
| 307 |
– |
"bad view number in odDepthMap"); |
| 408 |
|
if (dm == NULL) { /* free edge map */ |
| 409 |
+ |
if ((vn<0) | (vn>=odNViews)) |
| 410 |
+ |
return; /* too late -- they're gone! */ |
| 411 |
|
if (odView[vn].emap != NULL) |
| 412 |
< |
free((char *)odView[vn].emap); |
| 412 |
> |
free((void *)odView[vn].emap); |
| 413 |
|
odView[vn].emap = NULL; |
| 414 |
|
odView[vn].dmap = NULL; |
| 415 |
|
return; |
| 416 |
|
} |
| 417 |
+ |
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
| 418 |
+ |
"bad view number in odDepthMap"); |
| 419 |
|
odView[vn].dmap = dm; /* initialize edge map */ |
| 420 |
|
if (odView[vn].emap == NULL) { |
| 421 |
< |
odView[vn].emap = (int4 *)malloc( |
| 422 |
< |
FL4NELS(odView[vn].hlow*odView[vn].vlow)*sizeof(int4)); |
| 421 |
> |
odView[vn].emap = (int32 *)malloc( |
| 422 |
> |
FL4NELS(odView[vn].hlow*odView[vn].vlow)*sizeof(int32)); |
| 423 |
|
if (odView[vn].emap == NULL) |
| 424 |
|
error(SYSTEM, "out of memory in odDepthMap"); |
| 425 |
|
} |
| 470 |
|
} |
| 471 |
|
|
| 472 |
|
|
| 473 |
< |
odUpdate(vn) /* update this view */ |
| 474 |
< |
int vn; |
| 473 |
> |
extern void |
| 474 |
> |
odUpdate( /* update this view */ |
| 475 |
> |
int vn |
| 476 |
> |
) |
| 477 |
|
{ |
| 478 |
< |
int i, j; |
| 479 |
< |
register struct ODblock *bp; |
| 480 |
< |
register int k; |
| 478 |
> |
static short primes[] = {9431,6803,4177,2659,1609,887,587,251,47,1}; |
| 479 |
> |
int myprime; |
| 480 |
> |
register int i, n; |
| 481 |
|
|
| 482 |
|
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY, |
| 483 |
|
"bad view number in odUpdate"); |
| 484 |
|
/* need to do some tone mapping? */ |
| 485 |
|
if (needmapping & NEWRGB) { |
| 486 |
|
if (needmapping & NEWMAP) { |
| 487 |
< |
tmClearHisto(); |
| 488 |
< |
if (tmAddHisto(odS.brt,odS.nsamp,1) != TM_E_OK) |
| 487 |
> |
if (needmapping & NEWHIST) |
| 488 |
> |
tmClearHisto(tmGlobal); |
| 489 |
> |
needmapping &= ~NEWHIST; |
| 490 |
> |
if (tmAddHisto(tmGlobal, odS.brt,odS.nsamp,1) != TM_E_OK) |
| 491 |
|
return; |
| 492 |
< |
if (tmComputeMapping(0.,0.,0.) != TM_E_OK) |
| 492 |
> |
if (tmComputeMapping(tmGlobal, 0.,0.,0.) != TM_E_OK) |
| 493 |
|
return; |
| 494 |
< |
for (k = odS.nsamp; k--; ) /* redraw all */ |
| 495 |
< |
if (odS.ip[k][0] >= 0) |
| 388 |
< |
SET4(odS.redraw, k); |
| 494 |
> |
needmapping &= ~NEWMAP; |
| 495 |
> |
odRedrawAll(); /* redraw everything */ |
| 496 |
|
} |
| 497 |
< |
if (tmMapPixels(odS.rgb,odS.brt,odS.chr,odS.nsamp) != TM_E_OK) |
| 497 |
> |
if (tmMapPixels(tmGlobal, (BYTE *)(odS.rgb), odS.brt, |
| 498 |
> |
(BYTE *)(odS.chr), odS.nsamp) != TM_E_OK) |
| 499 |
|
return; |
| 500 |
< |
needmapping = 0; /* reset flag */ |
| 500 |
> |
needmapping &= ~NEWRGB; |
| 501 |
|
} |
| 502 |
< |
/* draw each block in view */ |
| 503 |
< |
for (i = odView[vn].hlow; i--; ) |
| 504 |
< |
for (j = odView[vn].vlow; j--; ) { |
| 505 |
< |
/* get block */ |
| 506 |
< |
bp = odView[vn].bmap + j*odView[vn].hlow + i; |
| 507 |
< |
/* do quick, conservative flag check */ |
| 508 |
< |
for (k = (bp->first+bp->nsamp+31)>>5; |
| 509 |
< |
k-- > bp->first>>5; ) |
| 510 |
< |
if (odS.redraw[k]) |
| 511 |
< |
break; /* non-zero flag */ |
| 512 |
< |
if (k < bp->first>>5) |
| 513 |
< |
continue; /* no flags set */ |
| 514 |
< |
for (k = bp->nsamp; k--; ) /* sample by sample */ |
| 515 |
< |
if (CHK4(odS.redraw, bp->first+k)) { |
| 516 |
< |
odDrawBlockSamp(vn, i, j, bp->first+k); |
| 517 |
< |
CLR4(odS.redraw, bp->first+k); |
| 518 |
< |
} |
| 502 |
> |
if (odView[vn].n2redraw <= 0) |
| 503 |
> |
return; |
| 504 |
> |
#if REDRAWTHRESH |
| 505 |
> |
if (odView[vn].n2redraw < REDRAWTHRESH) |
| 506 |
> |
goto quickdraw; |
| 507 |
> |
/* pick a good prime step size */ |
| 508 |
> |
n = odView[vn].snext - odView[vn].sfirst; |
| 509 |
> |
for (i = 0; primes[i]<<5 >= n; i++) |
| 510 |
> |
; |
| 511 |
> |
while ((myprime = primes[i++]) > 1) |
| 512 |
> |
if (n % myprime) |
| 513 |
> |
break; |
| 514 |
> |
/* dissolve in new samples */ |
| 515 |
> |
for (i = odView[vn].sfirst; n-- > 0; i += myprime) { |
| 516 |
> |
if (i >= odView[vn].snext) |
| 517 |
> |
i -= odView[vn].snext - odView[vn].sfirst; |
| 518 |
> |
if (CHK4(odS.redraw, i)) { |
| 519 |
> |
odDrawSamp(vn, i); |
| 520 |
> |
CLR4(odS.redraw, i); |
| 521 |
|
} |
| 522 |
+ |
} |
| 523 |
+ |
odView[vn].n2redraw = 0; |
| 524 |
+ |
return; |
| 525 |
+ |
quickdraw: /* quicker sparse flag checking */ |
| 526 |
+ |
#endif |
| 527 |
+ |
/* redraw samples at end */ |
| 528 |
+ |
for (i = odView[vn].snext-31; i < odView[vn].snext; i++) |
| 529 |
+ |
if (CHK4(odS.redraw, i)) { |
| 530 |
+ |
odDrawSamp(vn, i); |
| 531 |
+ |
CLR4(odS.redraw, i); |
| 532 |
+ |
} |
| 533 |
+ |
/* faster flag checks in middle */ |
| 534 |
+ |
for (n = odView[vn].snext>>5; n-- > (odView[vn].sfirst+0x1f)>>5; ) |
| 535 |
+ |
for (i = 0; odS.redraw[n]; i++) /* skips faster */ |
| 536 |
+ |
if (odS.redraw[n] & 1L<<i) { |
| 537 |
+ |
odDrawSamp(vn, (n<<5)+i); |
| 538 |
+ |
odS.redraw[n] &= ~(1L<<i); |
| 539 |
+ |
} |
| 540 |
+ |
/* redraw samples at beginning */ |
| 541 |
+ |
for (i = odView[vn].sfirst; i < odView[vn].sfirst+31; i++) |
| 542 |
+ |
if (CHK4(odS.redraw, i)) { |
| 543 |
+ |
odDrawSamp(vn, i); |
| 544 |
+ |
CLR4(odS.redraw, i); |
| 545 |
+ |
} |
| 546 |
+ |
odView[vn].n2redraw = 0; |
| 547 |
|
} |
| 548 |
|
|
| 549 |
|
|
| 550 |
+ |
/* this turned out to be unnecessary */ |
| 551 |
|
#if 0 |
| 552 |
|
static |
| 553 |
|
clip_end(p, o, vp) /* clip line segment to view */ |
| 578 |
|
|
| 579 |
|
|
| 580 |
|
static int |
| 581 |
< |
make_arms(ar, cp, vp, sz) /* make arms for triangle fan */ |
| 582 |
< |
GLshort ar[MAXFAN][3]; |
| 583 |
< |
short cp[2]; |
| 584 |
< |
register struct ODview *vp; |
| 585 |
< |
double sz; |
| 581 |
> |
make_arms( /* make arms for triangle fan */ |
| 582 |
> |
GLshort ar[MAXFAN][3], |
| 583 |
> |
short cp[2], |
| 584 |
> |
register struct ODview *vp, |
| 585 |
> |
double sz |
| 586 |
> |
) |
| 587 |
|
{ |
| 588 |
|
int na, dv; |
| 589 |
< |
double hrad, vrad, phi0, phi; |
| 589 |
> |
double hrad, vrad, phi; |
| 590 |
|
register int i; |
| 591 |
|
|
| 592 |
|
DCHECK(sz > 1, CONSISTENCY, "super-unary size in make_arms"); |
| 593 |
< |
na = MAXFAN*sz*sz + 0.5; /* keep area constant */ |
| 593 |
> |
na = MAXFAN*sz + 0.5; /* keep arc length constant */ |
| 594 |
|
if (na < MINFAN) na = MINFAN; |
| 595 |
|
hrad = FANSIZE*sz*vp->hhi/vp->hlow; |
| 596 |
|
vrad = FANSIZE*sz*vp->vhi/vp->vlow; |
| 597 |
|
if (hrad*vrad < 2.25) |
| 598 |
|
hrad = vrad = 1.5; |
| 462 |
– |
phi0 = (2.*PI) * frandom(); |
| 599 |
|
dv = OMAXDEPTH*sz + 0.5; |
| 600 |
|
for (i = 0; i < na; i++) { |
| 601 |
< |
phi = phi0 + (2.*PI)*i/na; |
| 601 |
> |
phi = (2.*PI)*i/na; |
| 602 |
|
ar[i][0] = cp[0] + tcos(phi)*hrad + 0.5; |
| 603 |
|
ar[i][1] = cp[1] + tsin(phi)*vrad + 0.5; |
| 604 |
|
ar[i][2] = dv; |
| 609 |
|
|
| 610 |
|
|
| 611 |
|
static int |
| 612 |
< |
depthchange(vp, x0, y0, x1, y1) /* check depth discontinuity */ |
| 613 |
< |
register struct ODview *vp; |
| 614 |
< |
int x0, y0, x1, y1; |
| 612 |
> |
depthchange( /* check depth discontinuity */ |
| 613 |
> |
register struct ODview *vp, |
| 614 |
> |
int x0, |
| 615 |
> |
int y0, |
| 616 |
> |
int x1, |
| 617 |
> |
int y1 |
| 618 |
> |
) |
| 619 |
|
{ |
| 620 |
|
register double d0, d1; |
| 621 |
|
|
| 622 |
|
DCHECK(x0<0 | x0>=vp->hhi | y0<0 | y0>=vp->vhi, |
| 623 |
|
CONSISTENCY, "coordinates off view in depthchange"); |
| 624 |
|
|
| 625 |
< |
if (x1<0 | x1>=vp->hhi | y1<0 | y1>=vp->vhi) |
| 625 |
> |
if ((x1<0) | (x1>=vp->hhi) | (y1<0) | (y1>=vp->vhi)) |
| 626 |
|
return(1); |
| 627 |
|
|
| 628 |
|
d0 = vp->dmap[y0*vp->hhi + x0]; |
| 632 |
|
} |
| 633 |
|
|
| 634 |
|
|
| 635 |
< |
static |
| 636 |
< |
clip_edge(p, o, vp) /* clip line segment to depth edge */ |
| 637 |
< |
GLshort p[3]; |
| 638 |
< |
short o[2]; |
| 639 |
< |
register struct ODview *vp; |
| 635 |
> |
static void |
| 636 |
> |
clip_edge( /* clip line segment to depth edge */ |
| 637 |
> |
GLshort p[3], |
| 638 |
> |
short o[2], |
| 639 |
> |
register struct ODview *vp |
| 640 |
> |
) |
| 641 |
|
{ |
| 642 |
|
int x, y, xstep, ystep, rise, rise2, run, run2, n; |
| 643 |
|
|
| 656 |
|
n = rise + run; |
| 657 |
|
while (n--) /* run out arm, checking depth */ |
| 658 |
|
if (run2 > rise2) { |
| 518 |
– |
if (depthchange(vp, x, y, x+xstep, y)) |
| 519 |
– |
break; |
| 659 |
|
x += xstep; |
| 660 |
|
rise2 += rise; |
| 661 |
< |
} else { |
| 523 |
< |
if (depthchange(vp, x, y, x, y+ystep)) |
| 661 |
> |
if (depthchange(vp, x-xstep, y, x, y)) |
| 662 |
|
break; |
| 663 |
+ |
} else { |
| 664 |
|
y += ystep; |
| 665 |
|
run2 += run; |
| 666 |
+ |
if (depthchange(vp, x, y-ystep, x, y)) |
| 667 |
+ |
break; |
| 668 |
|
} |
| 669 |
|
if (n < 0) /* found something? */ |
| 670 |
|
return; |
| 678 |
|
|
| 679 |
|
|
| 680 |
|
static int |
| 681 |
< |
getblock(vp, h, v) /* get block index */ |
| 682 |
< |
register struct ODview *vp; |
| 683 |
< |
register int h, v; |
| 681 |
> |
getblock( /* get block index */ |
| 682 |
> |
register struct ODview *vp, |
| 683 |
> |
register int h, |
| 684 |
> |
register int v |
| 685 |
> |
) |
| 686 |
|
{ |
| 687 |
< |
if (h<0 | h>=vp->hhi | v<0 | v>=vp->vhi) |
| 687 |
> |
if ((h<0) | (h>=vp->hhi) | (v<0) | (v>=vp->vhi)) |
| 688 |
|
return(-1); |
| 689 |
|
return(h*vp->hlow/vp->hhi + v*vp->vlow/vp->vhi*vp->hlow); |
| 690 |
|
} |
| 691 |
|
|
| 692 |
|
|
| 693 |
< |
odDrawBlockSamp(vn, h, v, id) /* draw sample in view block */ |
| 694 |
< |
int vn, h, v; |
| 695 |
< |
register int id; |
| 693 |
> |
static int |
| 694 |
> |
blockedge( /* check for edge between blocks? */ |
| 695 |
> |
register struct ODview *vp, |
| 696 |
> |
register int bi0, |
| 697 |
> |
register int bi1 |
| 698 |
> |
) |
| 699 |
|
{ |
| 700 |
+ |
if (bi1 == bi0) |
| 701 |
+ |
return(0); /* same block */ |
| 702 |
+ |
if (bi1 < 0) |
| 703 |
+ |
return(1); /* end off view */ |
| 704 |
+ |
if (CHK4(vp->emap, bi1)) |
| 705 |
+ |
return(1); /* end block has edges */ |
| 706 |
+ |
if (bi1 == bi0+1 || bi1 == bi0-1 || |
| 707 |
+ |
bi1 == bi0+vp->hlow || bi1 == bi0-vp->hlow) |
| 708 |
+ |
return(0); /* end in adjacent block -- no edges */ |
| 709 |
+ |
return(1); /* conservative for rarer case */ |
| 710 |
+ |
} |
| 711 |
+ |
|
| 712 |
+ |
|
| 713 |
+ |
static void |
| 714 |
+ |
odDrawSamp( /* draw view sample */ |
| 715 |
+ |
int vn, |
| 716 |
+ |
register int id |
| 717 |
+ |
) |
| 718 |
+ |
{ |
| 719 |
|
GLshort arm[MAXFAN][3]; |
| 720 |
< |
int narms, blockindex, bi1; |
| 720 |
> |
int narms, blockindex; |
| 721 |
|
register struct ODview *vp; |
| 722 |
|
double size; |
| 723 |
|
int home_edges; |
| 724 |
|
register int i; |
| 725 |
|
|
| 726 |
|
vp = odView + vn; |
| 727 |
< |
blockindex = v*vp->hlow + h; |
| 728 |
< |
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"); |
| 727 |
> |
blockindex = getblock(vp, odS.ip[id][0], odS.ip[id][1]); |
| 728 |
> |
DCHECK(blockindex<0, CONSISTENCY, "bad sample handed to odDrawSamp"); |
| 729 |
|
DCHECK(vp->bmap[blockindex].nused <= 0, |
| 730 |
< |
CONSISTENCY, "bad in-use count in odDrawBlockSamp"); |
| 730 |
> |
CONSISTENCY, "bad in-use count in odDrawSamp"); |
| 731 |
|
/* create triangle fan */ |
| 732 |
|
size = 1./sqrt((double)vp->bmap[blockindex].nused); |
| 733 |
|
narms = make_arms(arm, odS.ip[id], vp, size); |
| 734 |
|
if (vp->emap != NULL) { /* check for edge collisions */ |
| 735 |
|
home_edges = CHK4(vp->emap, blockindex); |
| 736 |
|
for (i = 0; i < narms; i++) |
| 737 |
< |
/* the following test is flawed, because we could |
| 738 |
< |
* 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)) )) |
| 737 |
> |
if (home_edges || blockedge(vp, blockindex, |
| 738 |
> |
getblock(vp, arm[i][0], arm[i][1]))) |
| 739 |
|
clip_edge(arm[i], odS.ip[id], vp); |
| 740 |
|
} |
| 741 |
|
/* draw triangle fan */ |
