1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.24 |
static const char RCSid[] = "$Id: rv3.c,v 2.23 2008/08/21 16:13:00 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 |
2.22 |
#define WFLUSH 64 /* 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 |
2.24 |
static unsigned long niflush; /* flushes since newimage() */ |
29 |
greg |
2.2 |
|
30 |
greg |
2.10 |
int |
31 |
greg |
2.22 |
getrect( /* get a box */ |
32 |
|
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char *s, |
33 |
|
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RECT *r |
34 |
|
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) |
35 |
greg |
1.7 |
{ |
36 |
|
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int x0, y0, x1, y1; |
37 |
|
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|
38 |
|
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if (*s && !strncmp(s, "all", strlen(s))) { |
39 |
|
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r->l = r->d = 0; |
40 |
greg |
1.9 |
r->r = hresolu; |
41 |
|
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r->u = vresolu; |
42 |
greg |
1.7 |
return(0); |
43 |
|
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} |
44 |
|
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if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
45 |
|
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if (dev->getcur == NULL) |
46 |
|
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return(-1); |
47 |
|
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(*dev->comout)("Pick first corner\n"); |
48 |
|
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if ((*dev->getcur)(&x0, &y0) == ABORT) |
49 |
|
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return(-1); |
50 |
|
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(*dev->comout)("Pick second corner\n"); |
51 |
|
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if ((*dev->getcur)(&x1, &y1) == ABORT) |
52 |
|
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return(-1); |
53 |
|
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} |
54 |
|
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if (x0 < x1) { |
55 |
|
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r->l = x0; |
56 |
|
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r->r = x1; |
57 |
|
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} else { |
58 |
|
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r->l = x1; |
59 |
|
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r->r = x0; |
60 |
|
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} |
61 |
|
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if (y0 < y1) { |
62 |
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r->d = y0; |
63 |
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r->u = y1; |
64 |
|
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} else { |
65 |
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r->d = y1; |
66 |
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r->u = y0; |
67 |
|
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} |
68 |
|
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if (r->l < 0) r->l = 0; |
69 |
|
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if (r->d < 0) r->d = 0; |
70 |
greg |
1.9 |
if (r->r > hresolu) r->r = hresolu; |
71 |
|
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if (r->u > vresolu) r->u = vresolu; |
72 |
greg |
1.7 |
if (r->l > r->r) r->l = r->r; |
73 |
|
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if (r->d > r->u) r->d = r->u; |
74 |
|
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return(0); |
75 |
|
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} |
76 |
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|
77 |
|
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|
78 |
greg |
2.10 |
int |
79 |
greg |
2.22 |
getinterest( /* get area of interest */ |
80 |
|
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char *s, |
81 |
|
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int direc, |
82 |
|
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FVECT vec, |
83 |
|
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double *mp |
84 |
|
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) |
85 |
greg |
1.7 |
{ |
86 |
|
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int x, y; |
87 |
|
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RAY thisray; |
88 |
greg |
2.22 |
int i; |
89 |
greg |
1.7 |
|
90 |
|
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if (sscanf(s, "%lf", mp) != 1) |
91 |
|
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*mp = 1.0; |
92 |
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else if (*mp < -FTINY) /* negative zoom is reduction */ |
93 |
|
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*mp = -1.0 / *mp; |
94 |
|
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else if (*mp <= FTINY) { /* too small */ |
95 |
|
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error(COMMAND, "illegal magnification"); |
96 |
|
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return(-1); |
97 |
|
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} |
98 |
greg |
2.2 |
if (!sscanvec(sskip(s), vec)) { |
99 |
greg |
1.7 |
if (dev->getcur == NULL) |
100 |
|
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return(-1); |
101 |
|
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(*dev->comout)("Pick view center\n"); |
102 |
|
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if ((*dev->getcur)(&x, &y) == ABORT) |
103 |
|
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return(-1); |
104 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
105 |
|
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&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
106 |
greg |
1.17 |
error(COMMAND, "not on image"); |
107 |
|
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return(-1); |
108 |
|
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} |
109 |
greg |
1.7 |
if (!direc || ourview.type == VT_PAR) { |
110 |
greg |
2.17 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
111 |
greg |
1.7 |
if (!localhit(&thisray, &thescene)) { |
112 |
|
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error(COMMAND, "not a local object"); |
113 |
|
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return(-1); |
114 |
|
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} |
115 |
|
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} |
116 |
|
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if (direc) |
117 |
|
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if (ourview.type == VT_PAR) |
118 |
|
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for (i = 0; i < 3; i++) |
119 |
|
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vec[i] = thisray.rop[i] - ourview.vp[i]; |
120 |
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else |
121 |
|
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VCOPY(vec, thisray.rdir); |
122 |
|
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else |
123 |
|
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VCOPY(vec, thisray.rop); |
124 |
greg |
2.15 |
} else if (direc) { |
125 |
|
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for (i = 0; i < 3; i++) |
126 |
|
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vec[i] -= ourview.vp[i]; |
127 |
|
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if (normalize(vec) == 0.0) { |
128 |
|
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error(COMMAND, "point at view origin"); |
129 |
|
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return(-1); |
130 |
|
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} |
131 |
|
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} |
132 |
greg |
1.7 |
return(0); |
133 |
|
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} |
134 |
greg |
1.1 |
|
135 |
|
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|
136 |
|
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float * /* keep consistent with COLOR typedef */ |
137 |
greg |
2.22 |
greyof( /* convert color to greyscale */ |
138 |
|
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COLOR col |
139 |
|
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) |
140 |
greg |
1.1 |
{ |
141 |
|
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static COLOR gcol; |
142 |
|
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double b; |
143 |
|
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|
144 |
|
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b = bright(col); |
145 |
|
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setcolor(gcol, b, b, b); |
146 |
|
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return(gcol); |
147 |
|
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} |
148 |
|
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|
149 |
|
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|
150 |
greg |
2.22 |
int |
151 |
|
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paint( /* compute and paint a rectangle */ |
152 |
|
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PNODE *p |
153 |
|
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) |
154 |
greg |
1.1 |
{ |
155 |
greg |
2.22 |
extern int ray_pnprocs; |
156 |
greg |
2.5 |
static unsigned long lastflush = 0; |
157 |
greg |
1.1 |
static RAY thisray; |
158 |
greg |
2.24 |
int flushintvl; |
159 |
greg |
1.1 |
double h, v; |
160 |
|
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|
161 |
greg |
2.22 |
if (p->xmax - p->xmin <= 0 || p->ymax - p->ymin <= 0) { /* empty */ |
162 |
|
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p->x = p->xmin; |
163 |
|
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p->y = p->ymin; |
164 |
greg |
1.1 |
setcolor(p->v, 0.0, 0.0, 0.0); |
165 |
greg |
2.22 |
return(0); |
166 |
greg |
1.1 |
} |
167 |
|
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/* jitter ray direction */ |
168 |
greg |
2.22 |
p->x = h = p->xmin + (p->xmax-p->xmin)*frandom(); |
169 |
|
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p->y = v = p->ymin + (p->ymax-p->ymin)*frandom(); |
170 |
greg |
1.1 |
|
171 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
172 |
|
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h/hresolu, v/vresolu)) < -FTINY) { |
173 |
greg |
1.17 |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
174 |
|
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} else { |
175 |
greg |
2.22 |
int rval; |
176 |
greg |
2.17 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
177 |
greg |
2.22 |
thisray.rno = (unsigned long)p; |
178 |
|
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rval = ray_pqueue(&thisray); |
179 |
|
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if (!rval) |
180 |
|
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return(0); |
181 |
|
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if (rval < 0) |
182 |
|
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return(-1); |
183 |
|
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p = (PNODE *)thisray.rno; |
184 |
greg |
1.17 |
} |
185 |
greg |
1.1 |
|
186 |
|
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copycolor(p->v, thisray.rcol); |
187 |
|
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scalecolor(p->v, exposure); |
188 |
|
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|
189 |
greg |
2.23 |
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
190 |
|
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p->xmin, p->ymin, p->xmax, p->ymax); |
191 |
greg |
1.13 |
|
192 |
greg |
2.24 |
if (ambounce <= 0) /* shall we check for input? */ |
193 |
|
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flushintvl = ray_pnprocs*WFLUSH; |
194 |
|
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else if (niflush < WFLUSH) |
195 |
|
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flushintvl = ray_pnprocs*niflush/(ambounce+1); |
196 |
|
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else |
197 |
|
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flushintvl = ray_pnprocs*WFLUSH/(ambounce+1); |
198 |
|
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|
199 |
|
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if (dev->flush != NULL && raynum - lastflush >= flushintvl) { |
200 |
greg |
2.22 |
lastflush = raynum; |
201 |
greg |
1.13 |
(*dev->flush)(); |
202 |
greg |
2.23 |
niflush++; |
203 |
greg |
1.13 |
} |
204 |
greg |
2.22 |
return(1); |
205 |
|
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} |
206 |
|
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|
207 |
|
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|
208 |
|
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int |
209 |
greg |
2.24 |
waitrays(void) /* finish up pending rays */ |
210 |
greg |
2.22 |
{ |
211 |
|
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int nwaited = 0; |
212 |
|
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int rval; |
213 |
|
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RAY raydone; |
214 |
|
|
|
215 |
|
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while ((rval = ray_presult(&raydone, 0)) > 0) { |
216 |
|
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PNODE *p = (PNODE *)raydone.rno; |
217 |
|
|
copycolor(p->v, raydone.rcol); |
218 |
|
|
scalecolor(p->v, exposure); |
219 |
|
|
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
220 |
|
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p->xmin, p->ymin, p->xmax, p->ymax); |
221 |
|
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nwaited++; |
222 |
|
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} |
223 |
|
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if (rval < 0) |
224 |
|
|
return(-1); |
225 |
|
|
return(nwaited); |
226 |
greg |
1.1 |
} |
227 |
|
|
|
228 |
|
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|
229 |
greg |
2.10 |
void |
230 |
greg |
2.22 |
newimage( /* start a new image */ |
231 |
|
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char *s |
232 |
|
|
) |
233 |
greg |
1.1 |
{ |
234 |
greg |
2.22 |
int newnp; |
235 |
|
|
/* change in nproc? */ |
236 |
|
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if (s != NULL && sscanf(s, "%d", &newnp) == 1 && newnp > 0) { |
237 |
|
|
if (!newparam) { |
238 |
|
|
if (newnp < nproc) |
239 |
|
|
ray_pclose(nproc - newnp); |
240 |
|
|
else |
241 |
|
|
ray_popen(newnp - nproc); |
242 |
|
|
} |
243 |
|
|
nproc = newnp; |
244 |
|
|
} |
245 |
greg |
1.1 |
/* free old image */ |
246 |
|
|
freepkids(&ptrunk); |
247 |
greg |
1.9 |
/* compute resolution */ |
248 |
greg |
1.10 |
hresolu = dev->xsiz; |
249 |
|
|
vresolu = dev->ysiz; |
250 |
greg |
1.11 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
251 |
greg |
2.22 |
ptrunk.xmin = ptrunk.ymin = pframe.l = pframe.d = 0; |
252 |
|
|
ptrunk.xmax = pframe.r = hresolu; |
253 |
|
|
ptrunk.ymax = pframe.u = vresolu; |
254 |
greg |
1.1 |
pdepth = 0; |
255 |
|
|
/* clear device */ |
256 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
257 |
greg |
2.22 |
|
258 |
|
|
if (newparam) { /* (re)start rendering procs */ |
259 |
|
|
ray_pclose(0); |
260 |
|
|
ray_popen(nproc); |
261 |
|
|
newparam = 0; |
262 |
|
|
} |
263 |
greg |
2.23 |
niflush = 0; /* get first value */ |
264 |
greg |
2.22 |
paint(&ptrunk); |
265 |
greg |
1.1 |
} |
266 |
|
|
|
267 |
|
|
|
268 |
greg |
2.10 |
void |
269 |
greg |
2.22 |
redraw(void) /* redraw the image */ |
270 |
greg |
1.1 |
{ |
271 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
272 |
greg |
1.1 |
(*dev->comout)("redrawing...\n"); |
273 |
greg |
1.9 |
repaint(0, 0, hresolu, vresolu); |
274 |
greg |
1.1 |
(*dev->comout)("\n"); |
275 |
|
|
} |
276 |
|
|
|
277 |
|
|
|
278 |
greg |
2.10 |
void |
279 |
greg |
2.22 |
repaint( /* repaint a region */ |
280 |
|
|
int xmin, |
281 |
|
|
int ymin, |
282 |
|
|
int xmax, |
283 |
|
|
int ymax |
284 |
|
|
) |
285 |
greg |
1.1 |
{ |
286 |
|
|
RECT reg; |
287 |
|
|
|
288 |
|
|
reg.l = xmin; reg.r = xmax; |
289 |
|
|
reg.d = ymin; reg.u = ymax; |
290 |
|
|
|
291 |
greg |
2.22 |
paintrect(&ptrunk, ®); |
292 |
greg |
1.1 |
} |
293 |
|
|
|
294 |
|
|
|
295 |
greg |
2.10 |
void |
296 |
greg |
2.22 |
paintrect( /* paint picture rectangle */ |
297 |
|
|
PNODE *p, |
298 |
|
|
RECT *r |
299 |
|
|
) |
300 |
greg |
1.1 |
{ |
301 |
|
|
int mx, my; |
302 |
|
|
|
303 |
greg |
2.22 |
if (p->xmax - p->xmin <= 0 || p->ymax - p->ymin <= 0) |
304 |
greg |
1.1 |
return; |
305 |
|
|
|
306 |
|
|
if (p->kid == NULL) { |
307 |
|
|
(*dev->paintr)(greyscale?greyof(p->v):p->v, |
308 |
greg |
2.22 |
p->xmin, p->ymin, p->xmax, p->ymax); /* do this */ |
309 |
greg |
1.1 |
return; |
310 |
|
|
} |
311 |
greg |
2.22 |
mx = (p->xmin + p->xmax) >> 1; /* do kids */ |
312 |
|
|
my = (p->ymin + p->ymax) >> 1; |
313 |
greg |
1.1 |
if (mx > r->l) { |
314 |
|
|
if (my > r->d) |
315 |
greg |
2.22 |
paintrect(p->kid+DL, r); |
316 |
greg |
1.1 |
if (my < r->u) |
317 |
greg |
2.22 |
paintrect(p->kid+UL, r); |
318 |
greg |
1.1 |
} |
319 |
|
|
if (mx < r->r) { |
320 |
|
|
if (my > r->d) |
321 |
greg |
2.22 |
paintrect(p->kid+DR, r); |
322 |
greg |
1.1 |
if (my < r->u) |
323 |
greg |
2.22 |
paintrect(p->kid+UR, r); |
324 |
greg |
1.1 |
} |
325 |
|
|
} |
326 |
|
|
|
327 |
|
|
|
328 |
|
|
PNODE * |
329 |
greg |
2.22 |
findrect( /* find a rectangle */ |
330 |
|
|
int x, |
331 |
|
|
int y, |
332 |
|
|
PNODE *p, |
333 |
|
|
int pd |
334 |
|
|
) |
335 |
greg |
1.1 |
{ |
336 |
|
|
int mx, my; |
337 |
|
|
|
338 |
|
|
while (p->kid != NULL && pd--) { |
339 |
|
|
|
340 |
greg |
2.22 |
mx = (p->xmin + p->xmax) >> 1; |
341 |
|
|
my = (p->ymin + p->ymax) >> 1; |
342 |
greg |
1.1 |
|
343 |
|
|
if (x < mx) { |
344 |
|
|
if (y < my) { |
345 |
|
|
p = p->kid+DL; |
346 |
|
|
} else { |
347 |
|
|
p = p->kid+UL; |
348 |
|
|
} |
349 |
|
|
} else { |
350 |
|
|
if (y < my) { |
351 |
|
|
p = p->kid+DR; |
352 |
|
|
} else { |
353 |
|
|
p = p->kid+UR; |
354 |
|
|
} |
355 |
|
|
} |
356 |
|
|
} |
357 |
|
|
return(p); |
358 |
|
|
} |
359 |
|
|
|
360 |
|
|
|
361 |
greg |
2.10 |
void |
362 |
greg |
2.22 |
scalepict( /* scale picture values */ |
363 |
|
|
PNODE *p, |
364 |
|
|
double sf |
365 |
|
|
) |
366 |
greg |
1.1 |
{ |
367 |
|
|
scalecolor(p->v, sf); /* do this node */ |
368 |
|
|
|
369 |
|
|
if (p->kid == NULL) |
370 |
|
|
return; |
371 |
|
|
/* do children */ |
372 |
|
|
scalepict(p->kid+DL, sf); |
373 |
|
|
scalepict(p->kid+DR, sf); |
374 |
|
|
scalepict(p->kid+UL, sf); |
375 |
|
|
scalepict(p->kid+UR, sf); |
376 |
|
|
} |
377 |
|
|
|
378 |
|
|
|
379 |
greg |
2.10 |
void |
380 |
greg |
2.22 |
getpictcolrs( /* get scanline from picture */ |
381 |
|
|
int yoff, |
382 |
|
|
COLR *scan, |
383 |
|
|
PNODE *p, |
384 |
|
|
int xsiz, |
385 |
|
|
int ysiz |
386 |
|
|
) |
387 |
greg |
1.1 |
{ |
388 |
greg |
2.22 |
int mx; |
389 |
greg |
1.1 |
int my; |
390 |
|
|
|
391 |
|
|
if (p->kid == NULL) { /* do this node */ |
392 |
|
|
setcolr(scan[0], colval(p->v,RED), |
393 |
|
|
colval(p->v,GRN), |
394 |
|
|
colval(p->v,BLU)); |
395 |
|
|
for (mx = 1; mx < xsiz; mx++) |
396 |
|
|
copycolr(scan[mx], scan[0]); |
397 |
|
|
return; |
398 |
|
|
} |
399 |
|
|
/* do kids */ |
400 |
|
|
mx = xsiz >> 1; |
401 |
|
|
my = ysiz >> 1; |
402 |
|
|
if (yoff < my) { |
403 |
|
|
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
404 |
|
|
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
405 |
|
|
} else { |
406 |
|
|
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
407 |
|
|
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
408 |
|
|
} |
409 |
|
|
} |
410 |
|
|
|
411 |
|
|
|
412 |
greg |
2.10 |
void |
413 |
greg |
2.22 |
freepkids( /* free pnode's children */ |
414 |
|
|
PNODE *p |
415 |
|
|
) |
416 |
greg |
1.1 |
{ |
417 |
|
|
if (p->kid == NULL) |
418 |
|
|
return; |
419 |
|
|
freepkids(p->kid+DL); |
420 |
|
|
freepkids(p->kid+DR); |
421 |
|
|
freepkids(p->kid+UL); |
422 |
|
|
freepkids(p->kid+UR); |
423 |
greg |
2.10 |
free((void *)p->kid); |
424 |
greg |
1.1 |
p->kid = NULL; |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
|
428 |
greg |
2.10 |
void |
429 |
greg |
2.22 |
newview( /* change viewing parameters */ |
430 |
|
|
VIEW *vp |
431 |
|
|
) |
432 |
greg |
1.1 |
{ |
433 |
|
|
char *err; |
434 |
|
|
|
435 |
greg |
1.6 |
if ((err = setview(vp)) != NULL) { |
436 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err); |
437 |
|
|
error(COMMAND, errmsg); |
438 |
schorsch |
2.12 |
} else if (memcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
439 |
schorsch |
2.13 |
oldview = ourview; |
440 |
|
|
ourview = *vp; |
441 |
greg |
2.22 |
newimage(NULL); |
442 |
greg |
1.1 |
} |
443 |
|
|
} |
444 |
|
|
|
445 |
|
|
|
446 |
greg |
2.10 |
void |
447 |
greg |
2.22 |
moveview( /* move viewpoint */ |
448 |
|
|
double angle, |
449 |
|
|
double elev, |
450 |
|
|
double mag, |
451 |
|
|
FVECT vc |
452 |
|
|
) |
453 |
greg |
1.1 |
{ |
454 |
|
|
double d; |
455 |
greg |
1.4 |
FVECT v1; |
456 |
greg |
2.14 |
VIEW nv = ourview; |
457 |
greg |
2.22 |
int i; |
458 |
greg |
1.1 |
|
459 |
|
|
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
460 |
greg |
1.4 |
if (elev != 0.0) { |
461 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir); |
462 |
greg |
1.4 |
normalize(v1); |
463 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
464 |
|
|
} |
465 |
greg |
2.15 |
if (nv.type == VT_PAR) { |
466 |
|
|
nv.horiz /= mag; |
467 |
|
|
nv.vert /= mag; |
468 |
greg |
1.3 |
d = 0.0; /* don't move closer */ |
469 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
470 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
471 |
greg |
1.1 |
} else { |
472 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
473 |
greg |
2.15 |
if (nv.vfore > FTINY) { |
474 |
greg |
2.8 |
nv.vfore += d - d*mag; |
475 |
|
|
if (nv.vfore < 0.0) nv.vfore = 0.0; |
476 |
|
|
} |
477 |
greg |
2.15 |
if (nv.vaft > FTINY) { |
478 |
greg |
2.8 |
nv.vaft += d - d*mag; |
479 |
|
|
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
480 |
|
|
} |
481 |
greg |
2.16 |
nv.vdist /= mag; |
482 |
greg |
1.1 |
} |
483 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
484 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
485 |
greg |
1.1 |
newview(&nv); |
486 |
greg |
1.17 |
} |
487 |
|
|
|
488 |
|
|
|
489 |
greg |
2.10 |
void |
490 |
greg |
2.22 |
pcopy( /* copy paint node p1 into p2 */ |
491 |
|
|
PNODE *p1, |
492 |
|
|
PNODE *p2 |
493 |
|
|
) |
494 |
greg |
2.10 |
{ |
495 |
|
|
copycolor(p2->v, p1->v); |
496 |
|
|
p2->x = p1->x; |
497 |
|
|
p2->y = p1->y; |
498 |
|
|
} |
499 |
|
|
|
500 |
|
|
|
501 |
|
|
void |
502 |
greg |
2.22 |
zoomview( /* zoom in or out */ |
503 |
|
|
VIEW *vp, |
504 |
|
|
double zf |
505 |
|
|
) |
506 |
greg |
1.17 |
{ |
507 |
|
|
switch (vp->type) { |
508 |
|
|
case VT_PAR: /* parallel view */ |
509 |
greg |
2.9 |
vp->horiz /= zf; |
510 |
|
|
vp->vert /= zf; |
511 |
|
|
return; |
512 |
greg |
1.17 |
case VT_ANG: /* angular fisheye */ |
513 |
|
|
vp->horiz /= zf; |
514 |
greg |
2.9 |
if (vp->horiz > 360.) |
515 |
|
|
vp->horiz = 360.; |
516 |
greg |
1.17 |
vp->vert /= zf; |
517 |
greg |
2.9 |
if (vp->vert > 360.) |
518 |
|
|
vp->vert = 360.; |
519 |
|
|
return; |
520 |
greg |
2.21 |
case VT_PLS: /* planisphere fisheye */ |
521 |
|
|
vp->horiz = sin((PI/180./2.)*vp->horiz) / |
522 |
|
|
(1.0 + cos((PI/180./2.)*vp->horiz)) / zf; |
523 |
|
|
vp->horiz *= vp->horiz; |
524 |
|
|
vp->horiz = (2.*180./PI)*acos((1. - vp->horiz) / |
525 |
|
|
(1. + vp->horiz)); |
526 |
|
|
vp->vert = sin((PI/180./2.)*vp->vert) / |
527 |
|
|
(1.0 + cos((PI/180./2.)*vp->vert)) / zf; |
528 |
|
|
vp->vert *= vp->vert; |
529 |
|
|
vp->vert = (2.*180./PI)*acos((1. - vp->vert) / |
530 |
|
|
(1. + vp->vert)); |
531 |
|
|
return; |
532 |
greg |
2.9 |
case VT_CYL: /* cylindrical panorama */ |
533 |
|
|
vp->horiz /= zf; |
534 |
|
|
if (vp->horiz > 360.) |
535 |
|
|
vp->horiz = 360.; |
536 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
537 |
greg |
1.17 |
return; |
538 |
|
|
case VT_PER: /* perspective view */ |
539 |
|
|
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
540 |
|
|
(PI/180./2.); |
541 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
542 |
|
|
(PI/180./2.); |
543 |
|
|
return; |
544 |
|
|
case VT_HEM: /* hemispherical fisheye */ |
545 |
|
|
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
546 |
|
|
if (vp->horiz >= 1.0-FTINY) |
547 |
|
|
vp->horiz = 180.; |
548 |
|
|
else |
549 |
|
|
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
550 |
|
|
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
551 |
|
|
if (vp->vert >= 1.0-FTINY) |
552 |
|
|
vp->vert = 180.; |
553 |
|
|
else |
554 |
|
|
vp->vert = asin(vp->vert) / (PI/180./2.); |
555 |
|
|
return; |
556 |
|
|
} |
557 |
greg |
1.1 |
} |