1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.21 |
static const char RCSid[] = "$Id: rv3.c,v 2.20 2006/04/05 06:22:57 greg Exp $"; |
3 |
greg |
1.1 |
#endif |
4 |
|
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/* |
5 |
|
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* rv3.c - miscellaneous routines for rview. |
6 |
|
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* |
7 |
greg |
2.10 |
* External symbols declared in rpaint.h |
8 |
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*/ |
9 |
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10 |
greg |
2.11 |
#include "copyright.h" |
11 |
greg |
1.1 |
|
12 |
schorsch |
2.12 |
#include <string.h> |
13 |
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|
14 |
greg |
1.1 |
#include "ray.h" |
15 |
|
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#include "rpaint.h" |
16 |
|
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#include "random.h" |
17 |
greg |
1.7 |
|
18 |
greg |
1.13 |
#ifndef WFLUSH |
19 |
greg |
2.19 |
#define WFLUSH 2048 /* flush after this many rays */ |
20 |
greg |
1.13 |
#endif |
21 |
greg |
1.7 |
|
22 |
greg |
2.2 |
#ifdef SMLFLT |
23 |
|
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#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
24 |
|
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#else |
25 |
|
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#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
26 |
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#endif |
27 |
greg |
1.13 |
|
28 |
greg |
2.2 |
|
29 |
greg |
2.10 |
int |
30 |
greg |
1.7 |
getrect(s, r) /* get a box */ |
31 |
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char *s; |
32 |
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register RECT *r; |
33 |
|
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{ |
34 |
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int x0, y0, x1, y1; |
35 |
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|
36 |
|
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if (*s && !strncmp(s, "all", strlen(s))) { |
37 |
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r->l = r->d = 0; |
38 |
greg |
1.9 |
r->r = hresolu; |
39 |
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r->u = vresolu; |
40 |
greg |
1.7 |
return(0); |
41 |
|
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} |
42 |
|
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if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
43 |
|
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if (dev->getcur == NULL) |
44 |
|
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return(-1); |
45 |
|
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(*dev->comout)("Pick first corner\n"); |
46 |
|
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if ((*dev->getcur)(&x0, &y0) == ABORT) |
47 |
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return(-1); |
48 |
|
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(*dev->comout)("Pick second corner\n"); |
49 |
|
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if ((*dev->getcur)(&x1, &y1) == ABORT) |
50 |
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return(-1); |
51 |
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} |
52 |
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if (x0 < x1) { |
53 |
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r->l = x0; |
54 |
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r->r = x1; |
55 |
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} else { |
56 |
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r->l = x1; |
57 |
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r->r = x0; |
58 |
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} |
59 |
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if (y0 < y1) { |
60 |
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r->d = y0; |
61 |
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r->u = y1; |
62 |
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} else { |
63 |
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r->d = y1; |
64 |
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r->u = y0; |
65 |
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} |
66 |
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if (r->l < 0) r->l = 0; |
67 |
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if (r->d < 0) r->d = 0; |
68 |
greg |
1.9 |
if (r->r > hresolu) r->r = hresolu; |
69 |
|
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if (r->u > vresolu) r->u = vresolu; |
70 |
greg |
1.7 |
if (r->l > r->r) r->l = r->r; |
71 |
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if (r->d > r->u) r->d = r->u; |
72 |
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return(0); |
73 |
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} |
74 |
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75 |
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|
76 |
greg |
2.10 |
int |
77 |
greg |
1.7 |
getinterest(s, direc, vec, mp) /* get area of interest */ |
78 |
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char *s; |
79 |
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int direc; |
80 |
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FVECT vec; |
81 |
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double *mp; |
82 |
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{ |
83 |
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int x, y; |
84 |
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RAY thisray; |
85 |
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register int i; |
86 |
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|
87 |
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if (sscanf(s, "%lf", mp) != 1) |
88 |
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*mp = 1.0; |
89 |
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else if (*mp < -FTINY) /* negative zoom is reduction */ |
90 |
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*mp = -1.0 / *mp; |
91 |
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else if (*mp <= FTINY) { /* too small */ |
92 |
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error(COMMAND, "illegal magnification"); |
93 |
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return(-1); |
94 |
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} |
95 |
greg |
2.2 |
if (!sscanvec(sskip(s), vec)) { |
96 |
greg |
1.7 |
if (dev->getcur == NULL) |
97 |
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return(-1); |
98 |
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(*dev->comout)("Pick view center\n"); |
99 |
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if ((*dev->getcur)(&x, &y) == ABORT) |
100 |
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return(-1); |
101 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
102 |
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&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
103 |
greg |
1.17 |
error(COMMAND, "not on image"); |
104 |
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return(-1); |
105 |
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} |
106 |
greg |
1.7 |
if (!direc || ourview.type == VT_PAR) { |
107 |
greg |
2.17 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
108 |
greg |
1.7 |
if (!localhit(&thisray, &thescene)) { |
109 |
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error(COMMAND, "not a local object"); |
110 |
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return(-1); |
111 |
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} |
112 |
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} |
113 |
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if (direc) |
114 |
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if (ourview.type == VT_PAR) |
115 |
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for (i = 0; i < 3; i++) |
116 |
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vec[i] = thisray.rop[i] - ourview.vp[i]; |
117 |
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else |
118 |
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VCOPY(vec, thisray.rdir); |
119 |
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else |
120 |
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VCOPY(vec, thisray.rop); |
121 |
greg |
2.15 |
} else if (direc) { |
122 |
|
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for (i = 0; i < 3; i++) |
123 |
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vec[i] -= ourview.vp[i]; |
124 |
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if (normalize(vec) == 0.0) { |
125 |
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error(COMMAND, "point at view origin"); |
126 |
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return(-1); |
127 |
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} |
128 |
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} |
129 |
greg |
1.7 |
return(0); |
130 |
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} |
131 |
greg |
1.1 |
|
132 |
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|
133 |
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float * /* keep consistent with COLOR typedef */ |
134 |
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greyof(col) /* convert color to greyscale */ |
135 |
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register COLOR col; |
136 |
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{ |
137 |
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static COLOR gcol; |
138 |
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double b; |
139 |
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|
140 |
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b = bright(col); |
141 |
|
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setcolor(gcol, b, b, b); |
142 |
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return(gcol); |
143 |
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} |
144 |
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145 |
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|
146 |
greg |
2.10 |
void |
147 |
greg |
1.1 |
paint(p, xmin, ymin, xmax, ymax) /* compute and paint a rectangle */ |
148 |
|
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register PNODE *p; |
149 |
|
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int xmin, ymin, xmax, ymax; |
150 |
|
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{ |
151 |
greg |
2.5 |
static unsigned long lastflush = 0; |
152 |
greg |
1.1 |
static RAY thisray; |
153 |
|
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double h, v; |
154 |
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|
155 |
|
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if (xmax - xmin <= 0 || ymax - ymin <= 0) { /* empty */ |
156 |
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p->x = xmin; |
157 |
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p->y = ymin; |
158 |
|
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setcolor(p->v, 0.0, 0.0, 0.0); |
159 |
|
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return; |
160 |
|
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} |
161 |
|
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/* jitter ray direction */ |
162 |
greg |
1.15 |
h = xmin + (xmax-xmin)*frandom(); |
163 |
|
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v = ymin + (ymax-ymin)*frandom(); |
164 |
greg |
1.1 |
|
165 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
166 |
|
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h/hresolu, v/vresolu)) < -FTINY) { |
167 |
greg |
1.17 |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
168 |
|
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} else { |
169 |
greg |
2.17 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
170 |
greg |
2.20 |
samplendx++; |
171 |
greg |
1.17 |
rayvalue(&thisray); |
172 |
|
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} |
173 |
greg |
1.1 |
|
174 |
greg |
1.15 |
p->x = h; |
175 |
|
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p->y = v; |
176 |
greg |
1.1 |
copycolor(p->v, thisray.rcol); |
177 |
|
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scalecolor(p->v, exposure); |
178 |
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|
179 |
|
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(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
180 |
greg |
1.13 |
|
181 |
|
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if (dev->flush != NULL && nrays - lastflush >= WFLUSH) { |
182 |
|
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lastflush = nrays; |
183 |
|
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(*dev->flush)(); |
184 |
|
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} |
185 |
greg |
1.1 |
} |
186 |
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187 |
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|
188 |
greg |
2.10 |
void |
189 |
greg |
1.1 |
newimage() /* start a new image */ |
190 |
|
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{ |
191 |
|
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/* free old image */ |
192 |
|
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freepkids(&ptrunk); |
193 |
greg |
1.19 |
/* save reserve memory */ |
194 |
|
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fillreserves(); |
195 |
greg |
1.9 |
/* compute resolution */ |
196 |
greg |
1.10 |
hresolu = dev->xsiz; |
197 |
|
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vresolu = dev->ysiz; |
198 |
greg |
1.11 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
199 |
greg |
1.1 |
pframe.l = pframe.d = 0; |
200 |
greg |
1.9 |
pframe.r = hresolu; pframe.u = vresolu; |
201 |
greg |
1.1 |
pdepth = 0; |
202 |
|
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/* clear device */ |
203 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
204 |
greg |
1.1 |
/* get first value */ |
205 |
greg |
1.9 |
paint(&ptrunk, 0, 0, hresolu, vresolu); |
206 |
greg |
1.1 |
} |
207 |
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208 |
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|
209 |
greg |
2.10 |
void |
210 |
greg |
1.1 |
redraw() /* redraw the image */ |
211 |
|
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{ |
212 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
213 |
greg |
1.1 |
(*dev->comout)("redrawing...\n"); |
214 |
greg |
1.9 |
repaint(0, 0, hresolu, vresolu); |
215 |
greg |
1.1 |
(*dev->comout)("\n"); |
216 |
|
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} |
217 |
|
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|
218 |
|
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|
219 |
greg |
2.10 |
void |
220 |
greg |
1.1 |
repaint(xmin, ymin, xmax, ymax) /* repaint a region */ |
221 |
|
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int xmin, ymin, xmax, ymax; |
222 |
|
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{ |
223 |
|
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RECT reg; |
224 |
|
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|
225 |
|
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reg.l = xmin; reg.r = xmax; |
226 |
|
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reg.d = ymin; reg.u = ymax; |
227 |
|
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|
228 |
greg |
1.9 |
paintrect(&ptrunk, 0, 0, hresolu, vresolu, ®); |
229 |
greg |
1.1 |
} |
230 |
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|
231 |
|
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|
232 |
greg |
2.10 |
void |
233 |
greg |
1.1 |
paintrect(p, xmin, ymin, xmax, ymax, r) /* paint picture rectangle */ |
234 |
|
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register PNODE *p; |
235 |
|
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int xmin, ymin, xmax, ymax; |
236 |
|
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register RECT *r; |
237 |
|
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{ |
238 |
|
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int mx, my; |
239 |
|
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|
240 |
|
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if (xmax - xmin <= 0 || ymax - ymin <= 0) |
241 |
|
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return; |
242 |
|
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|
243 |
|
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if (p->kid == NULL) { |
244 |
|
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(*dev->paintr)(greyscale?greyof(p->v):p->v, |
245 |
|
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xmin, ymin, xmax, ymax); /* do this */ |
246 |
|
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return; |
247 |
|
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} |
248 |
|
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mx = (xmin + xmax) >> 1; /* do kids */ |
249 |
|
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my = (ymin + ymax) >> 1; |
250 |
|
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if (mx > r->l) { |
251 |
|
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if (my > r->d) |
252 |
|
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paintrect(p->kid+DL, xmin, ymin, mx, my, r); |
253 |
|
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if (my < r->u) |
254 |
|
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paintrect(p->kid+UL, xmin, my, mx, ymax, r); |
255 |
|
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} |
256 |
|
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if (mx < r->r) { |
257 |
|
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if (my > r->d) |
258 |
|
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paintrect(p->kid+DR, mx, ymin, xmax, my, r); |
259 |
|
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if (my < r->u) |
260 |
|
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paintrect(p->kid+UR, mx, my, xmax, ymax, r); |
261 |
|
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} |
262 |
|
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} |
263 |
|
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|
264 |
|
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|
265 |
|
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PNODE * |
266 |
|
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findrect(x, y, p, r, pd) /* find a rectangle */ |
267 |
|
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int x, y; |
268 |
|
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register PNODE *p; |
269 |
|
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register RECT *r; |
270 |
|
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int pd; |
271 |
|
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{ |
272 |
|
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int mx, my; |
273 |
|
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|
274 |
|
|
while (p->kid != NULL && pd--) { |
275 |
|
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|
276 |
|
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mx = (r->l + r->r) >> 1; |
277 |
|
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my = (r->d + r->u) >> 1; |
278 |
|
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|
279 |
|
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if (x < mx) { |
280 |
|
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r->r = mx; |
281 |
|
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if (y < my) { |
282 |
|
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r->u = my; |
283 |
|
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p = p->kid+DL; |
284 |
|
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} else { |
285 |
|
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r->d = my; |
286 |
|
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p = p->kid+UL; |
287 |
|
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} |
288 |
|
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} else { |
289 |
|
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r->l = mx; |
290 |
|
|
if (y < my) { |
291 |
|
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r->u = my; |
292 |
|
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p = p->kid+DR; |
293 |
|
|
} else { |
294 |
|
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r->d = my; |
295 |
|
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p = p->kid+UR; |
296 |
|
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} |
297 |
|
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} |
298 |
|
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} |
299 |
|
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return(p); |
300 |
|
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} |
301 |
|
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|
302 |
|
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|
303 |
greg |
2.10 |
void |
304 |
greg |
1.1 |
scalepict(p, sf) /* scale picture values */ |
305 |
|
|
register PNODE *p; |
306 |
|
|
double sf; |
307 |
|
|
{ |
308 |
|
|
scalecolor(p->v, sf); /* do this node */ |
309 |
|
|
|
310 |
|
|
if (p->kid == NULL) |
311 |
|
|
return; |
312 |
|
|
/* do children */ |
313 |
|
|
scalepict(p->kid+DL, sf); |
314 |
|
|
scalepict(p->kid+DR, sf); |
315 |
|
|
scalepict(p->kid+UL, sf); |
316 |
|
|
scalepict(p->kid+UR, sf); |
317 |
|
|
} |
318 |
|
|
|
319 |
|
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|
320 |
greg |
2.10 |
void |
321 |
greg |
1.1 |
getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
322 |
|
|
int yoff; |
323 |
|
|
register COLR *scan; |
324 |
|
|
register PNODE *p; |
325 |
|
|
int xsiz, ysiz; |
326 |
|
|
{ |
327 |
|
|
register int mx; |
328 |
|
|
int my; |
329 |
|
|
|
330 |
|
|
if (p->kid == NULL) { /* do this node */ |
331 |
|
|
setcolr(scan[0], colval(p->v,RED), |
332 |
|
|
colval(p->v,GRN), |
333 |
|
|
colval(p->v,BLU)); |
334 |
|
|
for (mx = 1; mx < xsiz; mx++) |
335 |
|
|
copycolr(scan[mx], scan[0]); |
336 |
|
|
return; |
337 |
|
|
} |
338 |
|
|
/* do kids */ |
339 |
|
|
mx = xsiz >> 1; |
340 |
|
|
my = ysiz >> 1; |
341 |
|
|
if (yoff < my) { |
342 |
|
|
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
343 |
|
|
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
344 |
|
|
} else { |
345 |
|
|
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
346 |
|
|
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
347 |
|
|
} |
348 |
|
|
} |
349 |
|
|
|
350 |
|
|
|
351 |
greg |
2.10 |
void |
352 |
greg |
1.1 |
freepkids(p) /* free pnode's children */ |
353 |
|
|
register PNODE *p; |
354 |
|
|
{ |
355 |
|
|
if (p->kid == NULL) |
356 |
|
|
return; |
357 |
|
|
freepkids(p->kid+DL); |
358 |
|
|
freepkids(p->kid+DR); |
359 |
|
|
freepkids(p->kid+UL); |
360 |
|
|
freepkids(p->kid+UR); |
361 |
greg |
2.10 |
free((void *)p->kid); |
362 |
greg |
1.1 |
p->kid = NULL; |
363 |
|
|
} |
364 |
|
|
|
365 |
|
|
|
366 |
greg |
2.10 |
void |
367 |
greg |
1.1 |
newview(vp) /* change viewing parameters */ |
368 |
|
|
register VIEW *vp; |
369 |
|
|
{ |
370 |
|
|
char *err; |
371 |
|
|
|
372 |
greg |
1.6 |
if ((err = setview(vp)) != NULL) { |
373 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err); |
374 |
|
|
error(COMMAND, errmsg); |
375 |
schorsch |
2.12 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
376 |
schorsch |
2.13 |
oldview = ourview; |
377 |
|
|
ourview = *vp; |
378 |
greg |
1.14 |
newimage(); |
379 |
greg |
1.1 |
} |
380 |
|
|
} |
381 |
|
|
|
382 |
|
|
|
383 |
greg |
2.10 |
void |
384 |
greg |
1.4 |
moveview(angle, elev, mag, vc) /* move viewpoint */ |
385 |
|
|
double angle, elev, mag; |
386 |
greg |
1.1 |
FVECT vc; |
387 |
|
|
{ |
388 |
|
|
double d; |
389 |
greg |
1.4 |
FVECT v1; |
390 |
greg |
2.14 |
VIEW nv = ourview; |
391 |
greg |
1.1 |
register int i; |
392 |
|
|
|
393 |
|
|
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
394 |
greg |
1.4 |
if (elev != 0.0) { |
395 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir); |
396 |
greg |
1.4 |
normalize(v1); |
397 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
398 |
|
|
} |
399 |
greg |
2.15 |
if (nv.type == VT_PAR) { |
400 |
|
|
nv.horiz /= mag; |
401 |
|
|
nv.vert /= mag; |
402 |
greg |
1.3 |
d = 0.0; /* don't move closer */ |
403 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
404 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
405 |
greg |
1.1 |
} else { |
406 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
407 |
greg |
2.15 |
if (nv.vfore > FTINY) { |
408 |
greg |
2.8 |
nv.vfore += d - d*mag; |
409 |
|
|
if (nv.vfore < 0.0) nv.vfore = 0.0; |
410 |
|
|
} |
411 |
greg |
2.15 |
if (nv.vaft > FTINY) { |
412 |
greg |
2.8 |
nv.vaft += d - d*mag; |
413 |
|
|
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
414 |
|
|
} |
415 |
greg |
2.16 |
nv.vdist /= mag; |
416 |
greg |
1.1 |
} |
417 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
418 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
419 |
greg |
1.1 |
newview(&nv); |
420 |
greg |
1.17 |
} |
421 |
|
|
|
422 |
|
|
|
423 |
greg |
2.10 |
void |
424 |
|
|
pcopy(p1, p2) /* copy paint node p1 into p2 */ |
425 |
|
|
register PNODE *p1, *p2; |
426 |
|
|
{ |
427 |
|
|
copycolor(p2->v, p1->v); |
428 |
|
|
p2->x = p1->x; |
429 |
|
|
p2->y = p1->y; |
430 |
|
|
} |
431 |
|
|
|
432 |
|
|
|
433 |
|
|
void |
434 |
greg |
2.9 |
zoomview(vp, zf) /* zoom in or out */ |
435 |
greg |
1.17 |
register VIEW *vp; |
436 |
|
|
double zf; |
437 |
|
|
{ |
438 |
|
|
switch (vp->type) { |
439 |
|
|
case VT_PAR: /* parallel view */ |
440 |
greg |
2.9 |
vp->horiz /= zf; |
441 |
|
|
vp->vert /= zf; |
442 |
|
|
return; |
443 |
greg |
1.17 |
case VT_ANG: /* angular fisheye */ |
444 |
|
|
vp->horiz /= zf; |
445 |
greg |
2.9 |
if (vp->horiz > 360.) |
446 |
|
|
vp->horiz = 360.; |
447 |
greg |
1.17 |
vp->vert /= zf; |
448 |
greg |
2.9 |
if (vp->vert > 360.) |
449 |
|
|
vp->vert = 360.; |
450 |
|
|
return; |
451 |
greg |
2.21 |
case VT_PLS: /* planisphere fisheye */ |
452 |
|
|
vp->horiz = sin((PI/180./2.)*vp->horiz) / |
453 |
|
|
(1.0 + cos((PI/180./2.)*vp->horiz)) / zf; |
454 |
|
|
vp->horiz *= vp->horiz; |
455 |
|
|
vp->horiz = (2.*180./PI)*acos((1. - vp->horiz) / |
456 |
|
|
(1. + vp->horiz)); |
457 |
|
|
vp->vert = sin((PI/180./2.)*vp->vert) / |
458 |
|
|
(1.0 + cos((PI/180./2.)*vp->vert)) / zf; |
459 |
|
|
vp->vert *= vp->vert; |
460 |
|
|
vp->vert = (2.*180./PI)*acos((1. - vp->vert) / |
461 |
|
|
(1. + vp->vert)); |
462 |
|
|
return; |
463 |
greg |
2.9 |
case VT_CYL: /* cylindrical panorama */ |
464 |
|
|
vp->horiz /= zf; |
465 |
|
|
if (vp->horiz > 360.) |
466 |
|
|
vp->horiz = 360.; |
467 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
468 |
greg |
1.17 |
return; |
469 |
|
|
case VT_PER: /* perspective view */ |
470 |
|
|
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
471 |
|
|
(PI/180./2.); |
472 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
473 |
|
|
(PI/180./2.); |
474 |
|
|
return; |
475 |
|
|
case VT_HEM: /* hemispherical fisheye */ |
476 |
|
|
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
477 |
|
|
if (vp->horiz >= 1.0-FTINY) |
478 |
|
|
vp->horiz = 180.; |
479 |
|
|
else |
480 |
|
|
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
481 |
|
|
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
482 |
|
|
if (vp->vert >= 1.0-FTINY) |
483 |
|
|
vp->vert = 180.; |
484 |
|
|
else |
485 |
|
|
vp->vert = asin(vp->vert) / (PI/180./2.); |
486 |
|
|
return; |
487 |
|
|
} |
488 |
greg |
1.1 |
} |