1 |
gwlarson |
3.1 |
#ifndef lint |
2 |
greg |
3.17 |
static const char RCSid[] = "$Id: rhd_odraw.c,v 3.16 2004/01/01 11:21:55 schorsch Exp $"; |
3 |
gwlarson |
3.1 |
#endif |
4 |
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/* |
5 |
|
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* Routines for drawing samples using depth buffer checks. |
6 |
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*/ |
7 |
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8 |
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#include "standard.h" |
9 |
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10 |
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#include <GL/glx.h> |
11 |
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#include <GL/glu.h> |
12 |
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13 |
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#include "rhd_odraw.h" |
14 |
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15 |
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#ifndef DEPTHEPS |
16 |
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#define DEPTHEPS 0.02 /* depth epsilon */ |
17 |
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#endif |
18 |
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#ifndef SAMPSPERBLOCK |
19 |
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#define SAMPSPERBLOCK 1024 /* target samples per image block */ |
20 |
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#endif |
21 |
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#ifndef SFREEFRAC |
22 |
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#define SFREEFRAC 0.2 /* fraction to free at a time */ |
23 |
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#endif |
24 |
gwlarson |
3.11 |
#ifndef REDRAWTHRESH |
25 |
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#define REDRAWTHRESH 10240 /* number of samples for dissolve */ |
26 |
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#endif |
27 |
gwlarson |
3.1 |
#ifndef MAXFAN |
28 |
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#define MAXFAN 32 /* maximum arms in a triangle fan */ |
29 |
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#endif |
30 |
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#ifndef MINFAN |
31 |
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#define MINFAN 4 /* minimum arms in a triangle fan */ |
32 |
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#endif |
33 |
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#ifndef FANSIZE |
34 |
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#define FANSIZE 3.5 /* fan sizing factor */ |
35 |
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#endif |
36 |
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37 |
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#define NEWMAP 01 /* need to recompute mapping */ |
38 |
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#define NEWRGB 02 /* need to remap RGB values */ |
39 |
gwlarson |
3.2 |
#define NEWHIST 04 /* clear histogram as well */ |
40 |
gwlarson |
3.1 |
|
41 |
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struct ODview *odView; /* our view list */ |
42 |
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int odNViews; /* number of views in our list */ |
43 |
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44 |
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struct ODsamp odS; /* sample values */ |
45 |
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46 |
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static int needmapping; /* what needs doing with tone map */ |
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)+\ |
50 |
greg |
3.15 |
6*sizeof(BYTE))+sizeof(int32)) |
51 |
gwlarson |
3.1 |
|
52 |
schorsch |
3.16 |
static int sampcmp(const void *s0, const void *s1); |
53 |
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static int odAllocBlockSamp(int vn, int hh, int vh, double prox); |
54 |
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static int make_arms(GLshort ar[MAXFAN][3], short cp[2], struct ODview *vp, |
55 |
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double sz); |
56 |
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static int depthchange(struct ODview *vp, int x0, int y0, int x1, int y1); |
57 |
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static void clip_edge(GLshort p[3], short o[2], struct ODview *vp); |
58 |
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static int getblock(struct ODview *vp, int h, int v); |
59 |
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static int blockedge(struct ODview *vp, int bi0, int bi1); |
60 |
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static void odDrawSamp(int vn, int id); |
61 |
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62 |
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63 |
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extern int |
64 |
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odInit( /* initialize drawing routines */ |
65 |
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int n |
66 |
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) |
67 |
gwlarson |
3.1 |
{ |
68 |
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int nbytes, i, j, k, nextsamp, count, blockdiv; |
69 |
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int res[2]; |
70 |
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71 |
gwlarson |
3.3 |
if (odNViews > 0) { /* deallocate view structures */ |
72 |
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for (i = odNViews; i--; ) { |
73 |
greg |
3.13 |
free((void *)odView[i].bmap); |
74 |
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free((void *)odView[i].pmap); |
75 |
gwlarson |
3.1 |
if (odView[i].emap != NULL) |
76 |
greg |
3.13 |
free((void *)odView[i].emap); |
77 |
gwlarson |
3.1 |
} |
78 |
greg |
3.13 |
free((void *)odView); |
79 |
gwlarson |
3.1 |
odView = NULL; |
80 |
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odNViews = 0; |
81 |
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} |
82 |
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if (n && n != odS.nsamp) { |
83 |
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/* round space up to nearest power of 2 */ |
84 |
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nbytes = (n+31)/32 * SAMP32; |
85 |
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for (i = 1024; nbytes > i-8; i <<= 1) |
86 |
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; |
87 |
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n = (i-8)/SAMP32 * 32; |
88 |
gwlarson |
3.2 |
needmapping = NEWHIST; |
89 |
gwlarson |
3.1 |
} |
90 |
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if (n != odS.nsamp) { /* (re)allocate sample array */ |
91 |
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if (odS.nsamp) |
92 |
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free(odS.base); |
93 |
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odS.nsamp = 0; |
94 |
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if (!n) |
95 |
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return(0); |
96 |
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nbytes = (n+31)/32 * SAMP32; |
97 |
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odS.base = (char *)malloc(nbytes); |
98 |
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if (odS.base == NULL) |
99 |
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return(0); |
100 |
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/* assign larger alignment types earlier */ |
101 |
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odS.f = (union ODfunion *)odS.base; |
102 |
greg |
3.15 |
odS.redraw = (int32 *)(odS.f + n); |
103 |
gwlarson |
3.1 |
odS.ip = (short (*)[2])(odS.redraw + n/32); |
104 |
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odS.brt = (TMbright *)(odS.ip + n); |
105 |
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odS.chr = (BYTE (*)[3])(odS.brt + n); |
106 |
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odS.rgb = (BYTE (*)[3])(odS.chr + n); |
107 |
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odS.nsamp = n; |
108 |
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} |
109 |
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if (!n) |
110 |
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return(0); |
111 |
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/* allocate view information */ |
112 |
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count = 0; /* count pixels */ |
113 |
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for (i = 0; dev_auxview(i, res) != NULL; i++) |
114 |
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count += res[0]*res[1]; |
115 |
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odView = (struct ODview *)malloc(i*sizeof(struct ODview)); |
116 |
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if (odView == NULL) |
117 |
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return(0); |
118 |
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odNViews = i; |
119 |
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blockdiv = sqrt(count/(n/SAMPSPERBLOCK)) + 0.5; |
120 |
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if (blockdiv < 8) blockdiv = 8; |
121 |
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nextsamp = 0; count /= blockdiv*blockdiv; /* # blocks */ |
122 |
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while (i--) { /* initialize each view */ |
123 |
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dev_auxview(i, res); |
124 |
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odView[i].hhi = res[0]; |
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; |
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)); |
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 |
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needmapping |= NEWMAP; /* compute new map on update */ |
165 |
gwlarson |
3.1 |
return(odS.nsamp); /* return number of samples */ |
166 |
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} |
167 |
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168 |
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#undef SAMP32 |
169 |
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170 |
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171 |
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int |
172 |
schorsch |
3.16 |
sampcmp( /* sample order, descending proximity */ |
173 |
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const void *s0, |
174 |
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const void *s1 |
175 |
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) |
176 |
gwlarson |
3.1 |
{ |
177 |
schorsch |
3.16 |
register double diff = odS.closeness(*(int*)s1) - odS.closeness(*(int*)s0); |
178 |
gwlarson |
3.1 |
|
179 |
|
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return (diff > FTINY ? 1 : diff < -FTINY ? -1 : 0); |
180 |
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} |
181 |
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182 |
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183 |
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int |
184 |
schorsch |
3.16 |
odAllocBlockSamp( /* allocate sample from block */ |
185 |
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int vn, |
186 |
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int hh, |
187 |
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int vh, |
188 |
|
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double prox |
189 |
|
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) |
190 |
gwlarson |
3.1 |
{ |
191 |
|
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int si[SAMPSPERBLOCK+SAMPSPERBLOCK/4]; |
192 |
gwlarson |
3.2 |
int hl, vl; |
193 |
gwlarson |
3.1 |
VIEW *vw; |
194 |
|
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int res[2]; |
195 |
|
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register struct ODblock *bp; |
196 |
gwlarson |
3.2 |
register int i, j; |
197 |
|
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/* get block */ |
198 |
|
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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 |
|
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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 |
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/* search free list for it */ |
211 |
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if (i == bp->free) |
212 |
|
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break; /* special case */ |
213 |
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if (bp->free != ENDFREE) |
214 |
|
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for (j = bp->free; odS.nextfree(j) != ENDFREE; |
215 |
|
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j = odS.nextfree(j)) |
216 |
|
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if (odS.nextfree(j) == i) { |
217 |
|
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odS.nextfree(j) = |
218 |
|
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odS.nextfree(i); |
219 |
|
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bp->nused++; |
220 |
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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 |
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goto gotit; |
225 |
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} |
226 |
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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 |
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odS.ip[i][0]); |
231 |
gwlarson |
3.1 |
bp->free = odS.nextfree(i); |
232 |
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bp->nused++; |
233 |
gwlarson |
3.2 |
goto gotit; |
234 |
gwlarson |
3.1 |
} |
235 |
|
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DCHECK(bp->nsamp<=0, CONSISTENCY, |
236 |
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"no available samples in odAllocBlockSamp"); |
237 |
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DCHECK(bp->nsamp > sizeof(si)/sizeof(si[0]), CONSISTENCY, |
238 |
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"too many samples in odAllocBlockSamp"); |
239 |
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/* free some samples */ |
240 |
|
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if ((vw = dev_auxview(vn, res)) == NULL) |
241 |
|
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error(CONSISTENCY, "bad view number in odAllocBlockSamp"); |
242 |
|
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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 |
gwlarson |
3.2 |
i = bp->nsamp*SFREEFRAC + .5; /* put them into free list */ |
246 |
|
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if (i >= bp->nsamp) i = bp->nsamp-1; /* paranoia */ |
247 |
|
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bp->pthresh = odS.closeness(si[i]); /* new proximity threshold */ |
248 |
gwlarson |
3.1 |
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 |
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 |
|
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odS.ip[i][0] = hh; |
257 |
|
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odS.ip[i][1] = vh; |
258 |
|
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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 |
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263 |
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|
264 |
schorsch |
3.16 |
extern void |
265 |
|
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odSample( /* add a sample value */ |
266 |
|
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COLR c, |
267 |
|
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FVECT d, |
268 |
|
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FVECT p |
269 |
|
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) |
270 |
gwlarson |
3.1 |
{ |
271 |
|
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FVECT disp; |
272 |
gwlarson |
3.2 |
double d0, d1, h, v, prox; |
273 |
gwlarson |
3.1 |
register VIEW *vw; |
274 |
gwlarson |
3.2 |
int hh, vh; |
275 |
gwlarson |
3.1 |
int res[2]; |
276 |
|
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register int i, id; |
277 |
|
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|
278 |
|
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DCHECK(odS.nsamp<=0, CONSISTENCY, "no samples allocated in odSample"); |
279 |
|
|
/* add value to each view */ |
280 |
|
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for (i = 0; (vw = dev_auxview(i, res)) != NULL; i++) { |
281 |
|
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DCHECK(i>=odNViews, CONSISTENCY, "too many views in odSample"); |
282 |
|
|
CHECK(vw->type!=VT_PER, INTERNAL, |
283 |
|
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"cannot handle non-perspective views"); |
284 |
|
|
if (p != NULL) { /* compute view position */ |
285 |
|
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VSUB(disp, p, vw->vp); |
286 |
|
|
d0 = DOT(disp, vw->vdir); |
287 |
|
|
if (d0 <= vw->vfore+FTINY) |
288 |
|
|
continue; /* too close */ |
289 |
|
|
} else { |
290 |
|
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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 |
schorsch |
3.16 |
extern void |
332 |
|
|
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 |
schorsch |
3.16 |
extern void |
343 |
|
|
odRedrawAll(void) /* mark all samples for redraw */ |
344 |
gwlarson |
3.6 |
{ |
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 |
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 |
schorsch |
3.16 |
extern void |
359 |
|
|
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 |
|
|
register struct ODblock *bp; |
369 |
|
|
register int k; |
370 |
|
|
|
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 |
schorsch |
3.16 |
extern void |
399 |
|
|
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 |
|
|
register int k, l; |
407 |
|
|
|
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 |
schorsch |
3.16 |
extern void |
474 |
|
|
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 |
|
|
register 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 |
3.17 |
if (tmMapPixels(tmGlobal, (BYTE *)(odS.rgb), odS.brt, |
498 |
greg |
3.14 |
(BYTE *)(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 |
|
|
register struct ODview *vp; |
557 |
|
|
{ |
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 |
|
|
register struct ODview *vp, |
585 |
|
|
double sz |
586 |
|
|
) |
587 |
gwlarson |
3.1 |
{ |
588 |
|
|
int na, dv; |
589 |
gwlarson |
3.6 |
double hrad, vrad, phi; |
590 |
gwlarson |
3.1 |
register int i; |
591 |
|
|
|
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 |
|
|
register struct ODview *vp, |
614 |
|
|
int x0, |
615 |
|
|
int y0, |
616 |
|
|
int x1, |
617 |
|
|
int y1 |
618 |
|
|
) |
619 |
gwlarson |
3.1 |
{ |
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 |
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 |
|
|
register struct ODview *vp |
640 |
|
|
) |
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 |
|
|
register struct ODview *vp, |
683 |
|
|
register int h, |
684 |
|
|
register int v |
685 |
|
|
) |
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 |
|
|
register struct ODview *vp, |
696 |
|
|
register int bi0, |
697 |
|
|
register int bi1 |
698 |
|
|
) |
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 |
|
|
register int id |
717 |
|
|
) |
718 |
gwlarson |
3.1 |
{ |
719 |
|
|
GLshort arm[MAXFAN][3]; |
720 |
gwlarson |
3.6 |
int narms, blockindex; |
721 |
gwlarson |
3.1 |
register struct ODview *vp; |
722 |
|
|
double size; |
723 |
|
|
int home_edges; |
724 |
|
|
register int i; |
725 |
|
|
|
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 |
|
|
} |