| 1 |
gwlarson |
3.1 |
#ifndef lint
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| 2 |
greg |
3.19 |
static const char RCSid[] = "$Id: rhd_odraw.c,v 3.18 2011/05/20 02:06:39 greg Exp $";
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| 3 |
gwlarson |
3.1 |
#endif
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| 4 |
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/*
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| 5 |
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* Routines for drawing samples using depth buffer checks.
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| 6 |
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*/
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| 7 |
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| 8 |
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#include "standard.h"
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| 9 |
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| 10 |
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#include <GL/glx.h>
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| 11 |
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#include <GL/glu.h>
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| 12 |
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| 13 |
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#include "rhd_odraw.h"
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| 14 |
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| 15 |
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#ifndef DEPTHEPS
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| 16 |
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#define DEPTHEPS 0.02 /* depth epsilon */
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| 17 |
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#endif
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| 18 |
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#ifndef SAMPSPERBLOCK
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| 19 |
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#define SAMPSPERBLOCK 1024 /* target samples per image block */
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| 20 |
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#endif
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| 21 |
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#ifndef SFREEFRAC
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| 22 |
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#define SFREEFRAC 0.2 /* fraction to free at a time */
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| 23 |
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#endif
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| 24 |
gwlarson |
3.11 |
#ifndef REDRAWTHRESH
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| 25 |
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#define REDRAWTHRESH 10240 /* number of samples for dissolve */
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| 26 |
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#endif
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| 27 |
gwlarson |
3.1 |
#ifndef MAXFAN
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| 28 |
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#define MAXFAN 32 /* maximum arms in a triangle fan */
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| 29 |
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#endif
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| 30 |
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#ifndef MINFAN
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| 31 |
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#define MINFAN 4 /* minimum arms in a triangle fan */
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| 32 |
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#endif
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| 33 |
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#ifndef FANSIZE
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| 34 |
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#define FANSIZE 3.5 /* fan sizing factor */
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| 35 |
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#endif
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| 36 |
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| 37 |
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#define NEWMAP 01 /* need to recompute mapping */
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| 38 |
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#define NEWRGB 02 /* need to remap RGB values */
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| 39 |
gwlarson |
3.2 |
#define NEWHIST 04 /* clear histogram as well */
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| 40 |
gwlarson |
3.1 |
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| 41 |
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struct ODview *odView; /* our view list */
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| 42 |
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int odNViews; /* number of views in our list */
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| 43 |
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| 44 |
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struct ODsamp odS; /* sample values */
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| 45 |
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| 46 |
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static int needmapping; /* what needs doing with tone map */
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| 47 |
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| 48 |
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| 49 |
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#define SAMP32 (32*(2*sizeof(short)+sizeof(union ODfunion)+sizeof(TMbright)+\
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| 50 |
greg |
3.18 |
6*sizeof(uby8))+sizeof(int32))
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| 51 |
gwlarson |
3.1 |
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| 52 |
schorsch |
3.16 |
static int sampcmp(const void *s0, const void *s1);
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| 53 |
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static int odAllocBlockSamp(int vn, int hh, int vh, double prox);
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| 54 |
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static int make_arms(GLshort ar[MAXFAN][3], short cp[2], struct ODview *vp,
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| 55 |
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double sz);
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| 56 |
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static int depthchange(struct ODview *vp, int x0, int y0, int x1, int y1);
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| 57 |
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static void clip_edge(GLshort p[3], short o[2], struct ODview *vp);
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| 58 |
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static int getblock(struct ODview *vp, int h, int v);
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| 59 |
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static int blockedge(struct ODview *vp, int bi0, int bi1);
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| 60 |
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static void odDrawSamp(int vn, int id);
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| 62 |
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| 63 |
greg |
3.19 |
int
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| 64 |
schorsch |
3.16 |
odInit( /* initialize drawing routines */
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| 65 |
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int n
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| 66 |
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)
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| 67 |
gwlarson |
3.1 |
{
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| 68 |
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int nbytes, i, j, k, nextsamp, count, blockdiv;
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| 69 |
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int res[2];
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| 70 |
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| 71 |
gwlarson |
3.3 |
if (odNViews > 0) { /* deallocate view structures */
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| 72 |
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for (i = odNViews; i--; ) {
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| 73 |
greg |
3.13 |
free((void *)odView[i].bmap);
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| 74 |
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free((void *)odView[i].pmap);
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| 75 |
gwlarson |
3.1 |
if (odView[i].emap != NULL)
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| 76 |
greg |
3.13 |
free((void *)odView[i].emap);
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| 77 |
gwlarson |
3.1 |
}
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| 78 |
greg |
3.13 |
free((void *)odView);
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| 79 |
gwlarson |
3.1 |
odView = NULL;
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| 80 |
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odNViews = 0;
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| 81 |
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}
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| 82 |
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if (n && n != odS.nsamp) {
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| 83 |
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/* round space up to nearest power of 2 */
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| 84 |
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nbytes = (n+31)/32 * SAMP32;
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| 85 |
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for (i = 1024; nbytes > i-8; i <<= 1)
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| 86 |
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;
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| 87 |
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n = (i-8)/SAMP32 * 32;
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| 88 |
gwlarson |
3.2 |
needmapping = NEWHIST;
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| 89 |
gwlarson |
3.1 |
}
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| 90 |
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if (n != odS.nsamp) { /* (re)allocate sample array */
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| 91 |
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if (odS.nsamp)
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| 92 |
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free(odS.base);
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| 93 |
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odS.nsamp = 0;
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| 94 |
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if (!n)
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| 95 |
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return(0);
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| 96 |
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nbytes = (n+31)/32 * SAMP32;
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| 97 |
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odS.base = (char *)malloc(nbytes);
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| 98 |
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if (odS.base == NULL)
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| 99 |
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return(0);
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| 100 |
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/* assign larger alignment types earlier */
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| 101 |
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odS.f = (union ODfunion *)odS.base;
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| 102 |
greg |
3.15 |
odS.redraw = (int32 *)(odS.f + n);
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| 103 |
gwlarson |
3.1 |
odS.ip = (short (*)[2])(odS.redraw + n/32);
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| 104 |
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odS.brt = (TMbright *)(odS.ip + n);
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| 105 |
greg |
3.18 |
odS.chr = (uby8 (*)[3])(odS.brt + n);
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| 106 |
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odS.rgb = (uby8 (*)[3])(odS.chr + n);
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| 107 |
gwlarson |
3.1 |
odS.nsamp = n;
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| 108 |
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}
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| 109 |
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if (!n)
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| 110 |
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return(0);
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| 111 |
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/* allocate view information */
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| 112 |
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count = 0; /* count pixels */
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| 113 |
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for (i = 0; dev_auxview(i, res) != NULL; i++)
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| 114 |
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count += res[0]*res[1];
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| 115 |
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odView = (struct ODview *)malloc(i*sizeof(struct ODview));
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| 116 |
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if (odView == NULL)
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| 117 |
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return(0);
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| 118 |
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odNViews = i;
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| 119 |
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blockdiv = sqrt(count/(n/SAMPSPERBLOCK)) + 0.5;
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| 120 |
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if (blockdiv < 8) blockdiv = 8;
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| 121 |
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nextsamp = 0; count /= blockdiv*blockdiv; /* # blocks */
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| 122 |
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while (i--) { /* initialize each view */
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| 123 |
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dev_auxview(i, res);
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| 124 |
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odView[i].hhi = res[0];
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| 125 |
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odView[i].hlow = (res[0] + blockdiv/2) / blockdiv;
|
| 126 |
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if (odView[i].hlow < 1) odView[i].hlow = 1;
|
| 127 |
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odView[i].vhi = res[1];
|
| 128 |
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odView[i].vlow = (res[1] + blockdiv/2) / blockdiv;
|
| 129 |
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if (odView[i].vlow < 1) odView[i].vlow = 1;
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| 130 |
gwlarson |
3.3 |
odView[i].emap = NULL;
|
| 131 |
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odView[i].dmap = NULL;
|
| 132 |
greg |
3.15 |
odView[i].pmap = (int32 *)calloc(FL4NELS(res[0]*res[1]),
|
| 133 |
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sizeof(int32));
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| 134 |
gwlarson |
3.3 |
if (odView[i].pmap == NULL)
|
| 135 |
|
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return(0);
|
| 136 |
gwlarson |
3.1 |
j = odView[i].hlow*odView[i].vlow;
|
| 137 |
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odView[i].bmap = (struct ODblock *)malloc(
|
| 138 |
|
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j * sizeof(struct ODblock));
|
| 139 |
|
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if (odView[i].bmap == NULL)
|
| 140 |
|
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return(0);
|
| 141 |
|
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DCHECK(count<=0 | nextsamp>=n,
|
| 142 |
|
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CONSISTENCY, "counter botch in odInit");
|
| 143 |
|
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if (!i) count = j;
|
| 144 |
gwlarson |
3.5 |
odView[i].sfirst = nextsamp;
|
| 145 |
gwlarson |
3.2 |
while (j--) { /* initialize blocks & free lists */
|
| 146 |
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odView[i].bmap[j].pthresh = FHUGE;
|
| 147 |
gwlarson |
3.1 |
odView[i].bmap[j].first = k = nextsamp;
|
| 148 |
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nextsamp += odView[i].bmap[j].nsamp =
|
| 149 |
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(n - nextsamp)/count--;
|
| 150 |
|
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odView[i].bmap[j].free = k;
|
| 151 |
|
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while (++k < nextsamp)
|
| 152 |
|
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odS.nextfree(k-1) = k;
|
| 153 |
|
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odS.nextfree(k-1) = ENDFREE;
|
| 154 |
|
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odView[i].bmap[j].nused = 0;
|
| 155 |
|
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}
|
| 156 |
gwlarson |
3.5 |
odView[i].snext = nextsamp;
|
| 157 |
gwlarson |
3.11 |
odView[i].n2redraw = 0;
|
| 158 |
gwlarson |
3.1 |
}
|
| 159 |
|
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CLR4ALL(odS.redraw, odS.nsamp); /* clear redraw flags */
|
| 160 |
gwlarson |
3.2 |
for (i = odS.nsamp; i--; ) { /* clear values */
|
| 161 |
gwlarson |
3.1 |
odS.ip[i][0] = odS.ip[i][1] = -1;
|
| 162 |
gwlarson |
3.2 |
odS.brt[i] = TM_NOBRT;
|
| 163 |
|
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}
|
| 164 |
|
|
needmapping |= NEWMAP; /* compute new map on update */
|
| 165 |
gwlarson |
3.1 |
return(odS.nsamp); /* return number of samples */
|
| 166 |
|
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}
|
| 167 |
|
|
|
| 168 |
|
|
#undef SAMP32
|
| 169 |
|
|
|
| 170 |
|
|
|
| 171 |
|
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int
|
| 172 |
schorsch |
3.16 |
sampcmp( /* sample order, descending proximity */
|
| 173 |
|
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const void *s0,
|
| 174 |
|
|
const void *s1
|
| 175 |
|
|
)
|
| 176 |
gwlarson |
3.1 |
{
|
| 177 |
greg |
3.19 |
double diff = odS.closeness(*(int*)s1) - odS.closeness(*(int*)s0);
|
| 178 |
gwlarson |
3.1 |
|
| 179 |
|
|
return (diff > FTINY ? 1 : diff < -FTINY ? -1 : 0);
|
| 180 |
|
|
}
|
| 181 |
|
|
|
| 182 |
|
|
|
| 183 |
|
|
int
|
| 184 |
schorsch |
3.16 |
odAllocBlockSamp( /* allocate sample from block */
|
| 185 |
|
|
int vn,
|
| 186 |
|
|
int hh,
|
| 187 |
|
|
int vh,
|
| 188 |
|
|
double prox
|
| 189 |
|
|
)
|
| 190 |
gwlarson |
3.1 |
{
|
| 191 |
|
|
int si[SAMPSPERBLOCK+SAMPSPERBLOCK/4];
|
| 192 |
gwlarson |
3.2 |
int hl, vl;
|
| 193 |
gwlarson |
3.1 |
VIEW *vw;
|
| 194 |
|
|
int res[2];
|
| 195 |
greg |
3.19 |
struct ODblock *bp;
|
| 196 |
|
|
int i, j;
|
| 197 |
gwlarson |
3.2 |
/* get block */
|
| 198 |
|
|
hl = hh*odView[vn].hlow/odView[vn].hhi;
|
| 199 |
|
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vl = vh*odView[vn].vlow/odView[vn].vhi;
|
| 200 |
gwlarson |
3.1 |
bp = odView[vn].bmap + vl*odView[vn].hlow + hl;
|
| 201 |
gwlarson |
3.2 |
if (prox > bp->pthresh)
|
| 202 |
|
|
return(-1); /* worse than free list occupants */
|
| 203 |
|
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/* check for duplicate pixel */
|
| 204 |
gwlarson |
3.3 |
if (CHK4(odView[vn].pmap, vh*odView[vn].hhi + hh))
|
| 205 |
|
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i = bp->first + bp->nsamp;
|
| 206 |
|
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else
|
| 207 |
gwlarson |
3.11 |
i = 0;
|
| 208 |
gwlarson |
3.3 |
while (i-- > bp->first)
|
| 209 |
gwlarson |
3.2 |
if (hh == odS.ip[i][0] && vh == odS.ip[i][1]) { /* found it! */
|
| 210 |
|
|
/* search free list for it */
|
| 211 |
|
|
if (i == bp->free)
|
| 212 |
|
|
break; /* special case */
|
| 213 |
|
|
if (bp->free != ENDFREE)
|
| 214 |
|
|
for (j = bp->free; odS.nextfree(j) != ENDFREE;
|
| 215 |
|
|
j = odS.nextfree(j))
|
| 216 |
|
|
if (odS.nextfree(j) == i) {
|
| 217 |
|
|
odS.nextfree(j) =
|
| 218 |
|
|
odS.nextfree(i);
|
| 219 |
|
|
bp->nused++;
|
| 220 |
|
|
goto gotit;
|
| 221 |
|
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}
|
| 222 |
gwlarson |
3.11 |
if (prox >= 0.99*odS.closeness(i))
|
| 223 |
gwlarson |
3.2 |
return(-1); /* previous sample is fine */
|
| 224 |
|
|
goto gotit;
|
| 225 |
|
|
}
|
| 226 |
|
|
if (bp->free != ENDFREE) { /* allocate from free list */
|
| 227 |
gwlarson |
3.1 |
i = bp->free;
|
| 228 |
schorsch |
3.16 |
if ((odS.ip[i][0] >= 0) & (odS.ip[i][1] >= 0))
|
| 229 |
gwlarson |
3.3 |
CLR4(odView[vn].pmap, odS.ip[i][1]*odView[vn].hhi +
|
| 230 |
|
|
odS.ip[i][0]);
|
| 231 |
gwlarson |
3.1 |
bp->free = odS.nextfree(i);
|
| 232 |
|
|
bp->nused++;
|
| 233 |
gwlarson |
3.2 |
goto gotit;
|
| 234 |
gwlarson |
3.1 |
}
|
| 235 |
|
|
DCHECK(bp->nsamp<=0, CONSISTENCY,
|
| 236 |
|
|
"no available samples in odAllocBlockSamp");
|
| 237 |
|
|
DCHECK(bp->nsamp > sizeof(si)/sizeof(si[0]), CONSISTENCY,
|
| 238 |
|
|
"too many samples in odAllocBlockSamp");
|
| 239 |
|
|
/* free some samples */
|
| 240 |
|
|
if ((vw = dev_auxview(vn, res)) == NULL)
|
| 241 |
|
|
error(CONSISTENCY, "bad view number in odAllocBlockSamp");
|
| 242 |
|
|
for (i = bp->nsamp; i--; ) /* figure out which are worse */
|
| 243 |
|
|
si[i] = bp->first + i;
|
| 244 |
|
|
qsort((char *)si, bp->nsamp, sizeof(int), sampcmp);
|
| 245 |
gwlarson |
3.2 |
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 |
gwlarson |
3.1 |
while (--i > 0) {
|
| 249 |
|
|
odS.nextfree(si[i]) = bp->free;
|
| 250 |
|
|
bp->free = si[i];
|
| 251 |
|
|
bp->nused--;
|
| 252 |
|
|
}
|
| 253 |
gwlarson |
3.2 |
i = si[0]; /* use worst sample */
|
| 254 |
gwlarson |
3.3 |
CLR4(odView[vn].pmap, odS.ip[i][1]*odView[vn].hhi + odS.ip[i][0]);
|
| 255 |
gwlarson |
3.2 |
gotit:
|
| 256 |
|
|
odS.ip[i][0] = hh;
|
| 257 |
|
|
odS.ip[i][1] = vh;
|
| 258 |
|
|
odS.closeness(i) = prox;
|
| 259 |
gwlarson |
3.3 |
SET4(odView[vn].pmap, vh*odView[vn].hhi + hh);
|
| 260 |
gwlarson |
3.2 |
return(i);
|
| 261 |
gwlarson |
3.1 |
}
|
| 262 |
|
|
|
| 263 |
|
|
|
| 264 |
greg |
3.19 |
void
|
| 265 |
schorsch |
3.16 |
odSample( /* add a sample value */
|
| 266 |
|
|
COLR c,
|
| 267 |
|
|
FVECT d,
|
| 268 |
|
|
FVECT p
|
| 269 |
|
|
)
|
| 270 |
gwlarson |
3.1 |
{
|
| 271 |
|
|
FVECT disp;
|
| 272 |
gwlarson |
3.2 |
double d0, d1, h, v, prox;
|
| 273 |
greg |
3.19 |
VIEW *vw;
|
| 274 |
gwlarson |
3.2 |
int hh, vh;
|
| 275 |
gwlarson |
3.1 |
int res[2];
|
| 276 |
greg |
3.19 |
int i, id;
|
| 277 |
gwlarson |
3.1 |
|
| 278 |
|
|
DCHECK(odS.nsamp<=0, CONSISTENCY, "no samples allocated in odSample");
|
| 279 |
|
|
/* add value to each view */
|
| 280 |
|
|
for (i = 0; (vw = dev_auxview(i, res)) != NULL; i++) {
|
| 281 |
|
|
DCHECK(i>=odNViews, CONSISTENCY, "too many views in odSample");
|
| 282 |
|
|
CHECK(vw->type!=VT_PER, INTERNAL,
|
| 283 |
|
|
"cannot handle non-perspective views");
|
| 284 |
|
|
if (p != NULL) { /* compute view position */
|
| 285 |
|
|
VSUB(disp, p, vw->vp);
|
| 286 |
|
|
d0 = DOT(disp, vw->vdir);
|
| 287 |
|
|
if (d0 <= vw->vfore+FTINY)
|
| 288 |
|
|
continue; /* too close */
|
| 289 |
|
|
} else {
|
| 290 |
|
|
VCOPY(disp, d);
|
| 291 |
|
|
d0 = DOT(disp, vw->vdir);
|
| 292 |
|
|
if (d0 <= FTINY) /* behind view */
|
| 293 |
|
|
continue;
|
| 294 |
|
|
}
|
| 295 |
|
|
h = DOT(disp,vw->hvec)/(d0*vw->hn2) + 0.5 - vw->hoff;
|
| 296 |
|
|
if (h < 0. || h >= 1.)
|
| 297 |
|
|
continue; /* left or right */
|
| 298 |
|
|
v = DOT(disp,vw->vvec)/(d0*vw->vn2) + 0.5 - vw->voff;
|
| 299 |
|
|
if (v < 0. || v >= 1.)
|
| 300 |
|
|
continue; /* above or below */
|
| 301 |
|
|
hh = h * res[0];
|
| 302 |
|
|
vh = v * res[1];
|
| 303 |
|
|
if (odView[i].dmap != NULL) { /* check depth */
|
| 304 |
|
|
d1 = odView[i].dmap[vh*res[0] + hh];
|
| 305 |
|
|
if (d1 < 0.99*FHUGE && (d0 > (1.+DEPTHEPS)*d1 ||
|
| 306 |
|
|
(1.+DEPTHEPS)*d0 < d1))
|
| 307 |
|
|
continue; /* occlusion error */
|
| 308 |
|
|
}
|
| 309 |
|
|
if (p != NULL) { /* compute closeness (sin^2) */
|
| 310 |
|
|
d1 = DOT(disp, d);
|
| 311 |
gwlarson |
3.2 |
prox = 1. - d1*d1/DOT(disp,disp);
|
| 312 |
gwlarson |
3.1 |
} else
|
| 313 |
gwlarson |
3.2 |
prox = 0.;
|
| 314 |
|
|
/* allocate sample */
|
| 315 |
|
|
id = odAllocBlockSamp(i, hh, vh, prox);
|
| 316 |
|
|
if (id < 0)
|
| 317 |
|
|
continue; /* not good enough */
|
| 318 |
gwlarson |
3.1 |
/* convert color */
|
| 319 |
greg |
3.17 |
tmCvColrs(tmGlobal, &odS.brt[id], odS.chr[id], (COLR *)c, 1);
|
| 320 |
gwlarson |
3.1 |
if (imm_mode | needmapping) /* if immediate mode */
|
| 321 |
|
|
needmapping |= NEWRGB; /* map it later */
|
| 322 |
|
|
else /* else map it now */
|
| 323 |
greg |
3.17 |
tmMapPixels(tmGlobal, odS.rgb[id], &odS.brt[id],
|
| 324 |
|
|
odS.chr[id], 1);
|
| 325 |
gwlarson |
3.1 |
SET4(odS.redraw, id); /* mark for redraw */
|
| 326 |
gwlarson |
3.11 |
odView[i].n2redraw++;
|
| 327 |
gwlarson |
3.1 |
}
|
| 328 |
|
|
}
|
| 329 |
|
|
|
| 330 |
|
|
|
| 331 |
greg |
3.19 |
void
|
| 332 |
schorsch |
3.16 |
odRemap( /* recompute tone mapping */
|
| 333 |
|
|
int newhist
|
| 334 |
|
|
)
|
| 335 |
gwlarson |
3.1 |
{
|
| 336 |
|
|
needmapping |= NEWMAP|NEWRGB;
|
| 337 |
gwlarson |
3.2 |
if (newhist)
|
| 338 |
|
|
needmapping |= NEWHIST;
|
| 339 |
gwlarson |
3.1 |
}
|
| 340 |
|
|
|
| 341 |
|
|
|
| 342 |
greg |
3.19 |
void
|
| 343 |
schorsch |
3.16 |
odRedrawAll(void) /* mark all samples for redraw */
|
| 344 |
gwlarson |
3.6 |
{
|
| 345 |
greg |
3.19 |
int i;
|
| 346 |
gwlarson |
3.6 |
|
| 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 |
gwlarson |
3.11 |
/* not right, but not important */
|
| 353 |
|
|
for (i = 0; i < odNViews; i++)
|
| 354 |
|
|
odView[i].n2redraw = odView[i].snext - odView[i].sfirst;
|
| 355 |
gwlarson |
3.6 |
}
|
| 356 |
|
|
|
| 357 |
|
|
|
| 358 |
greg |
3.19 |
void
|
| 359 |
schorsch |
3.16 |
odRedraw( /* redraw view region */
|
| 360 |
|
|
int vn,
|
| 361 |
|
|
int hmin,
|
| 362 |
|
|
int vmin,
|
| 363 |
|
|
int hmax,
|
| 364 |
|
|
int vmax
|
| 365 |
|
|
)
|
| 366 |
gwlarson |
3.1 |
{
|
| 367 |
|
|
int i, j;
|
| 368 |
greg |
3.19 |
struct ODblock *bp;
|
| 369 |
|
|
int k;
|
| 370 |
gwlarson |
3.1 |
|
| 371 |
schorsch |
3.16 |
if ((vn<0) | (vn>=odNViews))
|
| 372 |
gwlarson |
3.1 |
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 |
schorsch |
3.16 |
if ((hmax <= hmin) | (vmax <= vmin))
|
| 379 |
gwlarson |
3.1 |
return;
|
| 380 |
|
|
/* convert to low resolution */
|
| 381 |
|
|
hmin = hmin * odView[vn].hlow / odView[vn].hhi;
|
| 382 |
|
|
hmax = hmax * odView[vn].hlow / odView[vn].hhi;
|
| 383 |
|
|
vmin = vmin * odView[vn].vlow / odView[vn].vhi;
|
| 384 |
|
|
vmax = vmax * odView[vn].vlow / odView[vn].vhi;
|
| 385 |
|
|
/* mark block samples for redraw, inclusive */
|
| 386 |
|
|
for (i = hmin; i <= hmax; i++)
|
| 387 |
|
|
for (j = vmin; j <= vmax; j++) {
|
| 388 |
|
|
bp = odView[vn].bmap + j*odView[vn].hlow + i;
|
| 389 |
|
|
for (k = bp->nsamp; k--; )
|
| 390 |
gwlarson |
3.11 |
if (odS.ip[bp->first+k][0] >= 0) {
|
| 391 |
gwlarson |
3.1 |
SET4(odS.redraw, bp->first+k);
|
| 392 |
gwlarson |
3.11 |
odView[vn].n2redraw++;
|
| 393 |
|
|
}
|
| 394 |
gwlarson |
3.1 |
}
|
| 395 |
|
|
}
|
| 396 |
|
|
|
| 397 |
|
|
|
| 398 |
greg |
3.19 |
void
|
| 399 |
schorsch |
3.16 |
odDepthMap( /* assign depth map for view */
|
| 400 |
|
|
int vn,
|
| 401 |
|
|
GLfloat *dm
|
| 402 |
|
|
)
|
| 403 |
gwlarson |
3.1 |
{
|
| 404 |
|
|
double d0, d1;
|
| 405 |
|
|
int i, j, hmin, hmax, vmin, vmax;
|
| 406 |
greg |
3.19 |
int k, l;
|
| 407 |
gwlarson |
3.1 |
|
| 408 |
|
|
if (dm == NULL) { /* free edge map */
|
| 409 |
schorsch |
3.16 |
if ((vn<0) | (vn>=odNViews))
|
| 410 |
gwlarson |
3.2 |
return; /* too late -- they're gone! */
|
| 411 |
gwlarson |
3.1 |
if (odView[vn].emap != NULL)
|
| 412 |
greg |
3.13 |
free((void *)odView[vn].emap);
|
| 413 |
gwlarson |
3.1 |
odView[vn].emap = NULL;
|
| 414 |
|
|
odView[vn].dmap = NULL;
|
| 415 |
|
|
return;
|
| 416 |
|
|
}
|
| 417 |
gwlarson |
3.2 |
DCHECK(vn<0 | vn>=odNViews, CONSISTENCY,
|
| 418 |
|
|
"bad view number in odDepthMap");
|
| 419 |
gwlarson |
3.1 |
odView[vn].dmap = dm; /* initialize edge map */
|
| 420 |
|
|
if (odView[vn].emap == NULL) {
|
| 421 |
greg |
3.15 |
odView[vn].emap = (int32 *)malloc(
|
| 422 |
|
|
FL4NELS(odView[vn].hlow*odView[vn].vlow)*sizeof(int32));
|
| 423 |
gwlarson |
3.1 |
if (odView[vn].emap == NULL)
|
| 424 |
|
|
error(SYSTEM, "out of memory in odDepthMap");
|
| 425 |
|
|
}
|
| 426 |
|
|
CLR4ALL(odView[vn].emap, odView[vn].hlow*odView[vn].vlow);
|
| 427 |
|
|
/* compute edge map */
|
| 428 |
|
|
vmin = odView[vn].vhi; /* enter loopsville */
|
| 429 |
|
|
for (j = odView[vn].vlow; j--; ) {
|
| 430 |
|
|
vmax = vmin;
|
| 431 |
|
|
vmin = j*odView[vn].vhi/odView[vn].vlow;
|
| 432 |
|
|
hmin = odView[vn].hhi;
|
| 433 |
|
|
for (i = odView[vn].hlow; i--; ) {
|
| 434 |
|
|
hmax = hmin;
|
| 435 |
|
|
hmin = i*odView[vn].hhi/odView[vn].hlow;
|
| 436 |
|
|
for (l = vmin; l < vmax; l++) { /* vertical edges */
|
| 437 |
|
|
d1 = dm[l*odView[vn].hhi+hmin];
|
| 438 |
|
|
for (k = hmin+1; k < hmax; k++) {
|
| 439 |
|
|
d0 = d1;
|
| 440 |
|
|
d1 = dm[l*odView[vn].hhi+k];
|
| 441 |
|
|
if (d0 > (1.+DEPTHEPS)*d1 ||
|
| 442 |
|
|
(1.+DEPTHEPS)*d0 < d1) {
|
| 443 |
|
|
SET4(odView[vn].emap,
|
| 444 |
|
|
j*odView[vn].hlow + i);
|
| 445 |
|
|
break;
|
| 446 |
|
|
}
|
| 447 |
|
|
}
|
| 448 |
|
|
if (k < hmax)
|
| 449 |
|
|
break;
|
| 450 |
|
|
}
|
| 451 |
|
|
if (l < vmax)
|
| 452 |
|
|
continue;
|
| 453 |
|
|
for (k = hmin; k < hmax; k++) { /* horizontal edges */
|
| 454 |
|
|
d1 = dm[vmin*odView[vn].hhi+k];
|
| 455 |
|
|
for (l = vmin+1; l < vmax; l++) {
|
| 456 |
|
|
d0 = d1;
|
| 457 |
|
|
d1 = dm[l*odView[vn].hhi+k];
|
| 458 |
|
|
if (d0 > (1.+DEPTHEPS)*d1 ||
|
| 459 |
|
|
(1.+DEPTHEPS)*d0 < d1) {
|
| 460 |
|
|
SET4(odView[vn].emap,
|
| 461 |
|
|
j*odView[vn].hlow + i);
|
| 462 |
|
|
break;
|
| 463 |
|
|
}
|
| 464 |
|
|
}
|
| 465 |
|
|
if (l < vmax)
|
| 466 |
|
|
break;
|
| 467 |
|
|
}
|
| 468 |
|
|
}
|
| 469 |
|
|
}
|
| 470 |
|
|
}
|
| 471 |
|
|
|
| 472 |
|
|
|
| 473 |
greg |
3.19 |
void
|
| 474 |
schorsch |
3.16 |
odUpdate( /* update this view */
|
| 475 |
|
|
int vn
|
| 476 |
|
|
)
|
| 477 |
gwlarson |
3.1 |
{
|
| 478 |
gwlarson |
3.11 |
static short primes[] = {9431,6803,4177,2659,1609,887,587,251,47,1};
|
| 479 |
|
|
int myprime;
|
| 480 |
greg |
3.19 |
int i, n;
|
| 481 |
gwlarson |
3.1 |
|
| 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 |
gwlarson |
3.2 |
if (needmapping & NEWHIST)
|
| 488 |
greg |
3.17 |
tmClearHisto(tmGlobal);
|
| 489 |
gwlarson |
3.6 |
needmapping &= ~NEWHIST;
|
| 490 |
greg |
3.17 |
if (tmAddHisto(tmGlobal, odS.brt,odS.nsamp,1) != TM_E_OK)
|
| 491 |
gwlarson |
3.1 |
return;
|
| 492 |
greg |
3.17 |
if (tmComputeMapping(tmGlobal, 0.,0.,0.) != TM_E_OK)
|
| 493 |
gwlarson |
3.1 |
return;
|
| 494 |
gwlarson |
3.6 |
needmapping &= ~NEWMAP;
|
| 495 |
|
|
odRedrawAll(); /* redraw everything */
|
| 496 |
gwlarson |
3.1 |
}
|
| 497 |
greg |
3.18 |
if (tmMapPixels(tmGlobal, (uby8 *)(odS.rgb), odS.brt,
|
| 498 |
|
|
(uby8 *)(odS.chr), odS.nsamp) != TM_E_OK)
|
| 499 |
gwlarson |
3.1 |
return;
|
| 500 |
gwlarson |
3.6 |
needmapping &= ~NEWRGB;
|
| 501 |
gwlarson |
3.1 |
}
|
| 502 |
gwlarson |
3.11 |
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 |
gwlarson |
3.5 |
if (CHK4(odS.redraw, i)) {
|
| 519 |
|
|
odDrawSamp(vn, i);
|
| 520 |
|
|
CLR4(odS.redraw, i);
|
| 521 |
|
|
}
|
| 522 |
gwlarson |
3.11 |
}
|
| 523 |
|
|
odView[vn].n2redraw = 0;
|
| 524 |
|
|
return;
|
| 525 |
|
|
quickdraw: /* quicker sparse flag checking */
|
| 526 |
|
|
#endif
|
| 527 |
gwlarson |
3.10 |
/* redraw samples at end */
|
| 528 |
|
|
for (i = odView[vn].snext-31; i < odView[vn].snext; i++)
|
| 529 |
gwlarson |
3.5 |
if (CHK4(odS.redraw, i)) {
|
| 530 |
|
|
odDrawSamp(vn, i);
|
| 531 |
|
|
CLR4(odS.redraw, i);
|
| 532 |
|
|
}
|
| 533 |
|
|
/* faster flag checks in middle */
|
| 534 |
gwlarson |
3.11 |
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 |
gwlarson |
3.4 |
}
|
| 540 |
gwlarson |
3.10 |
/* redraw samples at beginning */
|
| 541 |
|
|
for (i = odView[vn].sfirst; i < odView[vn].sfirst+31; i++)
|
| 542 |
gwlarson |
3.8 |
if (CHK4(odS.redraw, i)) {
|
| 543 |
|
|
odDrawSamp(vn, i);
|
| 544 |
|
|
CLR4(odS.redraw, i);
|
| 545 |
|
|
}
|
| 546 |
gwlarson |
3.11 |
odView[vn].n2redraw = 0;
|
| 547 |
gwlarson |
3.1 |
}
|
| 548 |
|
|
|
| 549 |
|
|
|
| 550 |
gwlarson |
3.5 |
/* this turned out to be unnecessary */
|
| 551 |
gwlarson |
3.1 |
#if 0
|
| 552 |
|
|
static
|
| 553 |
|
|
clip_end(p, o, vp) /* clip line segment to view */
|
| 554 |
|
|
GLshort p[3];
|
| 555 |
|
|
short o[2];
|
| 556 |
greg |
3.19 |
struct ODview *vp;
|
| 557 |
gwlarson |
3.1 |
{
|
| 558 |
|
|
if (p[0] < 0) {
|
| 559 |
|
|
p[1] = -o[0]*(p[1]-o[1])/(p[0]-o[0]) + o[1];
|
| 560 |
|
|
p[2] = -o[0]*p[2]/(p[0]-o[0]);
|
| 561 |
|
|
p[0] = 0;
|
| 562 |
|
|
} else if (p[0] >= vp->hhi) {
|
| 563 |
|
|
p[1] = (vp->hhi-1-o[0])*(p[1]-o[1])/(p[0]-o[0]) + o[1];
|
| 564 |
|
|
p[2] = (vp->hhi-1-o[0])*p[2]/(p[0]-o[0]);
|
| 565 |
|
|
p[0] = vp->hhi-1;
|
| 566 |
|
|
}
|
| 567 |
|
|
if (p[1] < 0) {
|
| 568 |
|
|
p[0] = -o[1]*(p[0]-o[0])/(p[1]-o[1]) + o[0];
|
| 569 |
|
|
p[2] = -o[1]*p[2]/(p[1]-o[1]);
|
| 570 |
|
|
p[1] = 0;
|
| 571 |
|
|
} else if (p[1] >= vp->vhi) {
|
| 572 |
|
|
p[0] = (vp->vhi-1-o[1])*(p[0]-o[0])/(p[1]-o[1]) + o[0];
|
| 573 |
|
|
p[2] = (vp->vhi-1-o[1])*p[2]/(p[1]-o[1]);
|
| 574 |
|
|
p[1] = vp->vhi-1;
|
| 575 |
|
|
}
|
| 576 |
|
|
}
|
| 577 |
|
|
#endif
|
| 578 |
|
|
|
| 579 |
|
|
|
| 580 |
|
|
static int
|
| 581 |
schorsch |
3.16 |
make_arms( /* make arms for triangle fan */
|
| 582 |
|
|
GLshort ar[MAXFAN][3],
|
| 583 |
|
|
short cp[2],
|
| 584 |
greg |
3.19 |
struct ODview *vp,
|
| 585 |
schorsch |
3.16 |
double sz
|
| 586 |
|
|
)
|
| 587 |
gwlarson |
3.1 |
{
|
| 588 |
|
|
int na, dv;
|
| 589 |
gwlarson |
3.6 |
double hrad, vrad, phi;
|
| 590 |
greg |
3.19 |
int i;
|
| 591 |
gwlarson |
3.1 |
|
| 592 |
|
|
DCHECK(sz > 1, CONSISTENCY, "super-unary size in make_arms");
|
| 593 |
gwlarson |
3.9 |
na = MAXFAN*sz + 0.5; /* keep arc length constant */
|
| 594 |
gwlarson |
3.1 |
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;
|
| 599 |
|
|
dv = OMAXDEPTH*sz + 0.5;
|
| 600 |
|
|
for (i = 0; i < na; i++) {
|
| 601 |
gwlarson |
3.6 |
phi = (2.*PI)*i/na;
|
| 602 |
gwlarson |
3.1 |
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;
|
| 605 |
|
|
/* clip_end(ar[i], cp, vp); */
|
| 606 |
|
|
}
|
| 607 |
|
|
return(na);
|
| 608 |
|
|
}
|
| 609 |
|
|
|
| 610 |
|
|
|
| 611 |
|
|
static int
|
| 612 |
schorsch |
3.16 |
depthchange( /* check depth discontinuity */
|
| 613 |
greg |
3.19 |
struct ODview *vp,
|
| 614 |
schorsch |
3.16 |
int x0,
|
| 615 |
|
|
int y0,
|
| 616 |
|
|
int x1,
|
| 617 |
|
|
int y1
|
| 618 |
|
|
)
|
| 619 |
gwlarson |
3.1 |
{
|
| 620 |
greg |
3.19 |
double d0, d1;
|
| 621 |
gwlarson |
3.1 |
|
| 622 |
|
|
DCHECK(x0<0 | x0>=vp->hhi | y0<0 | y0>=vp->vhi,
|
| 623 |
|
|
CONSISTENCY, "coordinates off view in depthchange");
|
| 624 |
|
|
|
| 625 |
schorsch |
3.16 |
if ((x1<0) | (x1>=vp->hhi) | (y1<0) | (y1>=vp->vhi))
|
| 626 |
gwlarson |
3.1 |
return(1);
|
| 627 |
|
|
|
| 628 |
|
|
d0 = vp->dmap[y0*vp->hhi + x0];
|
| 629 |
|
|
d1 = vp->dmap[y1*vp->hhi + x1];
|
| 630 |
|
|
|
| 631 |
|
|
return((1.+DEPTHEPS)*d0 < d1 || d0 > (1.+DEPTHEPS)*d1);
|
| 632 |
|
|
}
|
| 633 |
|
|
|
| 634 |
|
|
|
| 635 |
schorsch |
3.16 |
static void
|
| 636 |
|
|
clip_edge( /* clip line segment to depth edge */
|
| 637 |
|
|
GLshort p[3],
|
| 638 |
|
|
short o[2],
|
| 639 |
greg |
3.19 |
struct ODview *vp
|
| 640 |
schorsch |
3.16 |
)
|
| 641 |
gwlarson |
3.1 |
{
|
| 642 |
|
|
int x, y, xstep, ystep, rise, rise2, run, run2, n;
|
| 643 |
|
|
|
| 644 |
|
|
DCHECK(vp->dmap==NULL, CONSISTENCY,
|
| 645 |
|
|
"clip_edge called with no depth map");
|
| 646 |
|
|
x = o[0]; y = o[1];
|
| 647 |
|
|
run = p[0] - x;
|
| 648 |
|
|
xstep = run > 0 ? 1 : -1;
|
| 649 |
|
|
run *= xstep;
|
| 650 |
|
|
rise = p[1] - y;
|
| 651 |
|
|
ystep = rise > 0 ? 1 : -1;
|
| 652 |
|
|
rise *= ystep;
|
| 653 |
|
|
rise2 = run2 = 0;
|
| 654 |
|
|
if (rise > run) rise2 = 1;
|
| 655 |
|
|
else run2 = 1;
|
| 656 |
|
|
n = rise + run;
|
| 657 |
|
|
while (n--) /* run out arm, checking depth */
|
| 658 |
|
|
if (run2 > rise2) {
|
| 659 |
|
|
x += xstep;
|
| 660 |
|
|
rise2 += rise;
|
| 661 |
gwlarson |
3.7 |
if (depthchange(vp, x-xstep, y, x, y))
|
| 662 |
|
|
break;
|
| 663 |
gwlarson |
3.1 |
} else {
|
| 664 |
|
|
y += ystep;
|
| 665 |
|
|
run2 += run;
|
| 666 |
gwlarson |
3.7 |
if (depthchange(vp, x, y-ystep, x, y))
|
| 667 |
|
|
break;
|
| 668 |
gwlarson |
3.1 |
}
|
| 669 |
|
|
if (n < 0) /* found something? */
|
| 670 |
|
|
return;
|
| 671 |
|
|
if (run > rise)
|
| 672 |
|
|
p[2] = (x - o[0])*p[2]/(p[0] - o[0]);
|
| 673 |
|
|
else
|
| 674 |
|
|
p[2] = (y - o[1])*p[2]/(p[1] - o[1]);
|
| 675 |
|
|
p[0] = x;
|
| 676 |
|
|
p[1] = y;
|
| 677 |
|
|
}
|
| 678 |
|
|
|
| 679 |
|
|
|
| 680 |
|
|
static int
|
| 681 |
schorsch |
3.16 |
getblock( /* get block index */
|
| 682 |
greg |
3.19 |
struct ODview *vp,
|
| 683 |
|
|
int h,
|
| 684 |
|
|
int v
|
| 685 |
schorsch |
3.16 |
)
|
| 686 |
gwlarson |
3.1 |
{
|
| 687 |
schorsch |
3.16 |
if ((h<0) | (h>=vp->hhi) | (v<0) | (v>=vp->vhi))
|
| 688 |
gwlarson |
3.1 |
return(-1);
|
| 689 |
|
|
return(h*vp->hlow/vp->hhi + v*vp->vlow/vp->vhi*vp->hlow);
|
| 690 |
|
|
}
|
| 691 |
|
|
|
| 692 |
|
|
|
| 693 |
gwlarson |
3.6 |
static int
|
| 694 |
schorsch |
3.16 |
blockedge( /* check for edge between blocks? */
|
| 695 |
greg |
3.19 |
struct ODview *vp,
|
| 696 |
|
|
int bi0,
|
| 697 |
|
|
int bi1
|
| 698 |
schorsch |
3.16 |
)
|
| 699 |
gwlarson |
3.6 |
{
|
| 700 |
gwlarson |
3.8 |
if (bi1 == bi0)
|
| 701 |
|
|
return(0); /* same block */
|
| 702 |
gwlarson |
3.6 |
if (bi1 < 0)
|
| 703 |
|
|
return(1); /* end off view */
|
| 704 |
|
|
if (CHK4(vp->emap, bi1))
|
| 705 |
gwlarson |
3.8 |
return(1); /* end block has edges */
|
| 706 |
gwlarson |
3.6 |
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 |
schorsch |
3.16 |
static void
|
| 714 |
|
|
odDrawSamp( /* draw view sample */
|
| 715 |
|
|
int vn,
|
| 716 |
greg |
3.19 |
int id
|
| 717 |
schorsch |
3.16 |
)
|
| 718 |
gwlarson |
3.1 |
{
|
| 719 |
|
|
GLshort arm[MAXFAN][3];
|
| 720 |
gwlarson |
3.6 |
int narms, blockindex;
|
| 721 |
greg |
3.19 |
struct ODview *vp;
|
| 722 |
gwlarson |
3.1 |
double size;
|
| 723 |
|
|
int home_edges;
|
| 724 |
greg |
3.19 |
int i;
|
| 725 |
gwlarson |
3.1 |
|
| 726 |
|
|
vp = odView + vn;
|
| 727 |
gwlarson |
3.4 |
blockindex = getblock(vp, odS.ip[id][0], odS.ip[id][1]);
|
| 728 |
|
|
DCHECK(blockindex<0, CONSISTENCY, "bad sample handed to odDrawSamp");
|
| 729 |
gwlarson |
3.1 |
DCHECK(vp->bmap[blockindex].nused <= 0,
|
| 730 |
gwlarson |
3.4 |
CONSISTENCY, "bad in-use count in odDrawSamp");
|
| 731 |
gwlarson |
3.1 |
/* 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 |
gwlarson |
3.6 |
if (home_edges || blockedge(vp, blockindex,
|
| 738 |
|
|
getblock(vp, arm[i][0], arm[i][1])))
|
| 739 |
gwlarson |
3.1 |
clip_edge(arm[i], odS.ip[id], vp);
|
| 740 |
|
|
}
|
| 741 |
|
|
/* draw triangle fan */
|
| 742 |
|
|
glColor3ub(odS.rgb[id][0], odS.rgb[id][1], odS.rgb[id][2]);
|
| 743 |
|
|
glBegin(GL_TRIANGLE_FAN);
|
| 744 |
|
|
glVertex3s((GLshort)odS.ip[id][0], (GLshort)odS.ip[id][1], (GLshort)0);
|
| 745 |
|
|
for (i = 0; i < narms; i++)
|
| 746 |
|
|
glVertex3sv(arm[i]);
|
| 747 |
|
|
glVertex3sv(arm[0]); /* connect last to first */
|
| 748 |
|
|
glEnd();
|
| 749 |
|
|
}
|
