1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.10 |
static const char RCSid[] = "$Id$"; |
3 |
greg |
1.1 |
#endif |
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/* |
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* rv3.c - miscellaneous routines for rview. |
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* |
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greg |
2.10 |
* External symbols declared in rpaint.h |
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*/ |
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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greg |
1.1 |
*/ |
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#include "ray.h" |
68 |
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69 |
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#include "rpaint.h" |
70 |
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71 |
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#include "random.h" |
72 |
greg |
1.7 |
|
73 |
greg |
1.13 |
#ifndef WFLUSH |
74 |
greg |
2.4 |
#ifdef SPEED |
75 |
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#define WFLUSH (5*SPEED) |
76 |
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#else |
77 |
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#define WFLUSH 100 /* flush after this many rays */ |
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#endif |
79 |
greg |
1.13 |
#endif |
80 |
greg |
1.7 |
|
81 |
greg |
2.2 |
#ifdef SMLFLT |
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#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
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#else |
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#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
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#endif |
86 |
greg |
1.13 |
|
87 |
greg |
2.2 |
|
88 |
greg |
2.10 |
int |
89 |
greg |
1.7 |
getrect(s, r) /* get a box */ |
90 |
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char *s; |
91 |
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register RECT *r; |
92 |
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{ |
93 |
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int x0, y0, x1, y1; |
94 |
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95 |
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if (*s && !strncmp(s, "all", strlen(s))) { |
96 |
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r->l = r->d = 0; |
97 |
greg |
1.9 |
r->r = hresolu; |
98 |
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r->u = vresolu; |
99 |
greg |
1.7 |
return(0); |
100 |
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} |
101 |
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if (sscanf(s, "%d %d %d %d", &x0, &y0, &x1, &y1) != 4) { |
102 |
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if (dev->getcur == NULL) |
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return(-1); |
104 |
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(*dev->comout)("Pick first corner\n"); |
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if ((*dev->getcur)(&x0, &y0) == ABORT) |
106 |
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return(-1); |
107 |
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(*dev->comout)("Pick second corner\n"); |
108 |
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if ((*dev->getcur)(&x1, &y1) == ABORT) |
109 |
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return(-1); |
110 |
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} |
111 |
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if (x0 < x1) { |
112 |
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r->l = x0; |
113 |
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r->r = x1; |
114 |
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} else { |
115 |
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r->l = x1; |
116 |
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r->r = x0; |
117 |
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} |
118 |
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if (y0 < y1) { |
119 |
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r->d = y0; |
120 |
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r->u = y1; |
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} else { |
122 |
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r->d = y1; |
123 |
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r->u = y0; |
124 |
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} |
125 |
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if (r->l < 0) r->l = 0; |
126 |
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if (r->d < 0) r->d = 0; |
127 |
greg |
1.9 |
if (r->r > hresolu) r->r = hresolu; |
128 |
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if (r->u > vresolu) r->u = vresolu; |
129 |
greg |
1.7 |
if (r->l > r->r) r->l = r->r; |
130 |
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if (r->d > r->u) r->d = r->u; |
131 |
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return(0); |
132 |
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} |
133 |
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134 |
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135 |
greg |
2.10 |
int |
136 |
greg |
1.7 |
getinterest(s, direc, vec, mp) /* get area of interest */ |
137 |
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char *s; |
138 |
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int direc; |
139 |
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FVECT vec; |
140 |
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double *mp; |
141 |
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{ |
142 |
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int x, y; |
143 |
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RAY thisray; |
144 |
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register int i; |
145 |
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146 |
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if (sscanf(s, "%lf", mp) != 1) |
147 |
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*mp = 1.0; |
148 |
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else if (*mp < -FTINY) /* negative zoom is reduction */ |
149 |
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*mp = -1.0 / *mp; |
150 |
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else if (*mp <= FTINY) { /* too small */ |
151 |
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error(COMMAND, "illegal magnification"); |
152 |
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return(-1); |
153 |
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} |
154 |
greg |
2.2 |
if (!sscanvec(sskip(s), vec)) { |
155 |
greg |
1.7 |
if (dev->getcur == NULL) |
156 |
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return(-1); |
157 |
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(*dev->comout)("Pick view center\n"); |
158 |
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if ((*dev->getcur)(&x, &y) == ABORT) |
159 |
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return(-1); |
160 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
161 |
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&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
162 |
greg |
1.17 |
error(COMMAND, "not on image"); |
163 |
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return(-1); |
164 |
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} |
165 |
greg |
1.7 |
if (!direc || ourview.type == VT_PAR) { |
166 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
167 |
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if (!localhit(&thisray, &thescene)) { |
168 |
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error(COMMAND, "not a local object"); |
169 |
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return(-1); |
170 |
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} |
171 |
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} |
172 |
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if (direc) |
173 |
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if (ourview.type == VT_PAR) |
174 |
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for (i = 0; i < 3; i++) |
175 |
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vec[i] = thisray.rop[i] - ourview.vp[i]; |
176 |
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else |
177 |
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VCOPY(vec, thisray.rdir); |
178 |
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else |
179 |
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VCOPY(vec, thisray.rop); |
180 |
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} else if (direc) |
181 |
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for (i = 0; i < 3; i++) |
182 |
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vec[i] -= ourview.vp[i]; |
183 |
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return(0); |
184 |
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} |
185 |
greg |
1.1 |
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186 |
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187 |
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float * /* keep consistent with COLOR typedef */ |
188 |
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greyof(col) /* convert color to greyscale */ |
189 |
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register COLOR col; |
190 |
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{ |
191 |
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static COLOR gcol; |
192 |
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double b; |
193 |
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194 |
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b = bright(col); |
195 |
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setcolor(gcol, b, b, b); |
196 |
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return(gcol); |
197 |
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} |
198 |
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199 |
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200 |
greg |
2.10 |
void |
201 |
greg |
1.1 |
paint(p, xmin, ymin, xmax, ymax) /* compute and paint a rectangle */ |
202 |
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register PNODE *p; |
203 |
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int xmin, ymin, xmax, ymax; |
204 |
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{ |
205 |
greg |
2.5 |
static unsigned long lastflush = 0; |
206 |
greg |
1.1 |
static RAY thisray; |
207 |
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double h, v; |
208 |
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209 |
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if (xmax - xmin <= 0 || ymax - ymin <= 0) { /* empty */ |
210 |
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p->x = xmin; |
211 |
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p->y = ymin; |
212 |
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setcolor(p->v, 0.0, 0.0, 0.0); |
213 |
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return; |
214 |
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} |
215 |
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/* jitter ray direction */ |
216 |
greg |
1.15 |
h = xmin + (xmax-xmin)*frandom(); |
217 |
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v = ymin + (ymax-ymin)*frandom(); |
218 |
greg |
1.1 |
|
219 |
greg |
2.6 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
220 |
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h/hresolu, v/vresolu)) < -FTINY) { |
221 |
greg |
1.17 |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
222 |
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} else { |
223 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
224 |
greg |
1.20 |
samplendx++; |
225 |
greg |
1.17 |
rayvalue(&thisray); |
226 |
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} |
227 |
greg |
1.1 |
|
228 |
greg |
1.15 |
p->x = h; |
229 |
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p->y = v; |
230 |
greg |
1.1 |
copycolor(p->v, thisray.rcol); |
231 |
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scalecolor(p->v, exposure); |
232 |
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233 |
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(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
234 |
greg |
1.13 |
|
235 |
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if (dev->flush != NULL && nrays - lastflush >= WFLUSH) { |
236 |
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lastflush = nrays; |
237 |
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(*dev->flush)(); |
238 |
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} |
239 |
greg |
1.1 |
} |
240 |
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241 |
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242 |
greg |
2.10 |
void |
243 |
greg |
1.1 |
newimage() /* start a new image */ |
244 |
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{ |
245 |
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/* free old image */ |
246 |
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freepkids(&ptrunk); |
247 |
greg |
1.19 |
/* save reserve memory */ |
248 |
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fillreserves(); |
249 |
greg |
1.9 |
/* compute resolution */ |
250 |
greg |
1.10 |
hresolu = dev->xsiz; |
251 |
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vresolu = dev->ysiz; |
252 |
greg |
1.11 |
normaspect(viewaspect(&ourview), &dev->pixaspect, &hresolu, &vresolu); |
253 |
greg |
1.1 |
pframe.l = pframe.d = 0; |
254 |
greg |
1.9 |
pframe.r = hresolu; pframe.u = vresolu; |
255 |
greg |
1.1 |
pdepth = 0; |
256 |
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/* clear device */ |
257 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
258 |
greg |
1.1 |
/* get first value */ |
259 |
greg |
1.9 |
paint(&ptrunk, 0, 0, hresolu, vresolu); |
260 |
greg |
1.1 |
} |
261 |
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262 |
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263 |
greg |
2.10 |
void |
264 |
greg |
1.1 |
redraw() /* redraw the image */ |
265 |
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{ |
266 |
greg |
1.9 |
(*dev->clear)(hresolu, vresolu); |
267 |
greg |
1.1 |
(*dev->comout)("redrawing...\n"); |
268 |
greg |
1.9 |
repaint(0, 0, hresolu, vresolu); |
269 |
greg |
1.1 |
(*dev->comout)("\n"); |
270 |
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} |
271 |
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272 |
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273 |
greg |
2.10 |
void |
274 |
greg |
1.1 |
repaint(xmin, ymin, xmax, ymax) /* repaint a region */ |
275 |
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int xmin, ymin, xmax, ymax; |
276 |
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{ |
277 |
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RECT reg; |
278 |
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279 |
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reg.l = xmin; reg.r = xmax; |
280 |
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reg.d = ymin; reg.u = ymax; |
281 |
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282 |
greg |
1.9 |
paintrect(&ptrunk, 0, 0, hresolu, vresolu, ®); |
283 |
greg |
1.1 |
} |
284 |
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285 |
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286 |
greg |
2.10 |
void |
287 |
greg |
1.1 |
paintrect(p, xmin, ymin, xmax, ymax, r) /* paint picture rectangle */ |
288 |
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register PNODE *p; |
289 |
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int xmin, ymin, xmax, ymax; |
290 |
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register RECT *r; |
291 |
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{ |
292 |
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int mx, my; |
293 |
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294 |
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if (xmax - xmin <= 0 || ymax - ymin <= 0) |
295 |
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return; |
296 |
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297 |
|
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if (p->kid == NULL) { |
298 |
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(*dev->paintr)(greyscale?greyof(p->v):p->v, |
299 |
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xmin, ymin, xmax, ymax); /* do this */ |
300 |
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return; |
301 |
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} |
302 |
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mx = (xmin + xmax) >> 1; /* do kids */ |
303 |
|
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my = (ymin + ymax) >> 1; |
304 |
|
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if (mx > r->l) { |
305 |
|
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if (my > r->d) |
306 |
|
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paintrect(p->kid+DL, xmin, ymin, mx, my, r); |
307 |
|
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if (my < r->u) |
308 |
|
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paintrect(p->kid+UL, xmin, my, mx, ymax, r); |
309 |
|
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} |
310 |
|
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if (mx < r->r) { |
311 |
|
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if (my > r->d) |
312 |
|
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paintrect(p->kid+DR, mx, ymin, xmax, my, r); |
313 |
|
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if (my < r->u) |
314 |
|
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paintrect(p->kid+UR, mx, my, xmax, ymax, r); |
315 |
|
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} |
316 |
|
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} |
317 |
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|
318 |
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|
319 |
|
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PNODE * |
320 |
|
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findrect(x, y, p, r, pd) /* find a rectangle */ |
321 |
|
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int x, y; |
322 |
|
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register PNODE *p; |
323 |
|
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register RECT *r; |
324 |
|
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int pd; |
325 |
|
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{ |
326 |
|
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int mx, my; |
327 |
|
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|
328 |
|
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while (p->kid != NULL && pd--) { |
329 |
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|
330 |
|
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mx = (r->l + r->r) >> 1; |
331 |
|
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my = (r->d + r->u) >> 1; |
332 |
|
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|
333 |
|
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if (x < mx) { |
334 |
|
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r->r = mx; |
335 |
|
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if (y < my) { |
336 |
|
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r->u = my; |
337 |
|
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p = p->kid+DL; |
338 |
|
|
} else { |
339 |
|
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r->d = my; |
340 |
|
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p = p->kid+UL; |
341 |
|
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} |
342 |
|
|
} else { |
343 |
|
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r->l = mx; |
344 |
|
|
if (y < my) { |
345 |
|
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r->u = my; |
346 |
|
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p = p->kid+DR; |
347 |
|
|
} else { |
348 |
|
|
r->d = my; |
349 |
|
|
p = p->kid+UR; |
350 |
|
|
} |
351 |
|
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} |
352 |
|
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} |
353 |
|
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return(p); |
354 |
|
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} |
355 |
|
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|
356 |
|
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|
357 |
greg |
2.10 |
void |
358 |
greg |
1.1 |
scalepict(p, sf) /* scale picture values */ |
359 |
|
|
register PNODE *p; |
360 |
|
|
double sf; |
361 |
|
|
{ |
362 |
|
|
scalecolor(p->v, sf); /* do this node */ |
363 |
|
|
|
364 |
|
|
if (p->kid == NULL) |
365 |
|
|
return; |
366 |
|
|
/* do children */ |
367 |
|
|
scalepict(p->kid+DL, sf); |
368 |
|
|
scalepict(p->kid+DR, sf); |
369 |
|
|
scalepict(p->kid+UL, sf); |
370 |
|
|
scalepict(p->kid+UR, sf); |
371 |
|
|
} |
372 |
|
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|
373 |
|
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|
374 |
greg |
2.10 |
void |
375 |
greg |
1.1 |
getpictcolrs(yoff, scan, p, xsiz, ysiz) /* get scanline from picture */ |
376 |
|
|
int yoff; |
377 |
|
|
register COLR *scan; |
378 |
|
|
register PNODE *p; |
379 |
|
|
int xsiz, ysiz; |
380 |
|
|
{ |
381 |
|
|
register int mx; |
382 |
|
|
int my; |
383 |
|
|
|
384 |
|
|
if (p->kid == NULL) { /* do this node */ |
385 |
|
|
setcolr(scan[0], colval(p->v,RED), |
386 |
|
|
colval(p->v,GRN), |
387 |
|
|
colval(p->v,BLU)); |
388 |
|
|
for (mx = 1; mx < xsiz; mx++) |
389 |
|
|
copycolr(scan[mx], scan[0]); |
390 |
|
|
return; |
391 |
|
|
} |
392 |
|
|
/* do kids */ |
393 |
|
|
mx = xsiz >> 1; |
394 |
|
|
my = ysiz >> 1; |
395 |
|
|
if (yoff < my) { |
396 |
|
|
getpictcolrs(yoff, scan, p->kid+DL, mx, my); |
397 |
|
|
getpictcolrs(yoff, scan+mx, p->kid+DR, xsiz-mx, my); |
398 |
|
|
} else { |
399 |
|
|
getpictcolrs(yoff-my, scan, p->kid+UL, mx, ysiz-my); |
400 |
|
|
getpictcolrs(yoff-my, scan+mx, p->kid+UR, xsiz-mx, ysiz-my); |
401 |
|
|
} |
402 |
|
|
} |
403 |
|
|
|
404 |
|
|
|
405 |
greg |
2.10 |
void |
406 |
greg |
1.1 |
freepkids(p) /* free pnode's children */ |
407 |
|
|
register PNODE *p; |
408 |
|
|
{ |
409 |
|
|
if (p->kid == NULL) |
410 |
|
|
return; |
411 |
|
|
freepkids(p->kid+DL); |
412 |
|
|
freepkids(p->kid+DR); |
413 |
|
|
freepkids(p->kid+UL); |
414 |
|
|
freepkids(p->kid+UR); |
415 |
greg |
2.10 |
free((void *)p->kid); |
416 |
greg |
1.1 |
p->kid = NULL; |
417 |
|
|
} |
418 |
|
|
|
419 |
|
|
|
420 |
greg |
2.10 |
void |
421 |
greg |
1.1 |
newview(vp) /* change viewing parameters */ |
422 |
|
|
register VIEW *vp; |
423 |
|
|
{ |
424 |
|
|
char *err; |
425 |
|
|
|
426 |
greg |
1.6 |
if ((err = setview(vp)) != NULL) { |
427 |
greg |
1.1 |
sprintf(errmsg, "view not set - %s", err); |
428 |
|
|
error(COMMAND, errmsg); |
429 |
greg |
1.12 |
} else if (bcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
430 |
|
|
copystruct(&oldview, &ourview); |
431 |
|
|
copystruct(&ourview, vp); |
432 |
greg |
1.14 |
newimage(); |
433 |
greg |
1.1 |
} |
434 |
|
|
} |
435 |
|
|
|
436 |
|
|
|
437 |
greg |
2.10 |
void |
438 |
greg |
1.4 |
moveview(angle, elev, mag, vc) /* move viewpoint */ |
439 |
|
|
double angle, elev, mag; |
440 |
greg |
1.1 |
FVECT vc; |
441 |
|
|
{ |
442 |
|
|
double d; |
443 |
greg |
1.4 |
FVECT v1; |
444 |
greg |
1.1 |
VIEW nv; |
445 |
|
|
register int i; |
446 |
|
|
|
447 |
|
|
VCOPY(nv.vup, ourview.vup); |
448 |
greg |
1.9 |
nv.hoff = ourview.hoff; nv.voff = ourview.voff; |
449 |
greg |
1.1 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
450 |
greg |
1.4 |
if (elev != 0.0) { |
451 |
greg |
1.5 |
fcross(v1, ourview.vup, nv.vdir); |
452 |
greg |
1.4 |
normalize(v1); |
453 |
|
|
spinvector(nv.vdir, nv.vdir, v1, elev*(PI/180.)); |
454 |
|
|
} |
455 |
greg |
1.1 |
if ((nv.type = ourview.type) == VT_PAR) { |
456 |
|
|
nv.horiz = ourview.horiz / mag; |
457 |
|
|
nv.vert = ourview.vert / mag; |
458 |
greg |
1.3 |
d = 0.0; /* don't move closer */ |
459 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
460 |
greg |
1.3 |
d += (vc[i] - ourview.vp[i])*ourview.vdir[i]; |
461 |
greg |
2.7 |
nv.vfore = ourview.vfore; |
462 |
|
|
nv.vaft = ourview.vaft; |
463 |
greg |
1.1 |
} else { |
464 |
|
|
nv.horiz = ourview.horiz; |
465 |
|
|
nv.vert = ourview.vert; |
466 |
greg |
1.2 |
d = sqrt(dist2(ourview.vp, vc)) / mag; |
467 |
greg |
2.8 |
if ((nv.vfore = ourview.vfore) > FTINY) { |
468 |
|
|
nv.vfore += d - d*mag; |
469 |
|
|
if (nv.vfore < 0.0) nv.vfore = 0.0; |
470 |
|
|
} |
471 |
|
|
if ((nv.vaft = ourview.vaft) > FTINY) { |
472 |
|
|
nv.vaft += d - d*mag; |
473 |
|
|
if (nv.vaft <= nv.vfore) nv.vaft = 0.0; |
474 |
|
|
} |
475 |
greg |
1.1 |
} |
476 |
greg |
1.2 |
for (i = 0; i < 3; i++) |
477 |
|
|
nv.vp[i] = vc[i] - d*nv.vdir[i]; |
478 |
greg |
1.1 |
newview(&nv); |
479 |
greg |
1.17 |
} |
480 |
|
|
|
481 |
|
|
|
482 |
greg |
2.10 |
void |
483 |
|
|
pcopy(p1, p2) /* copy paint node p1 into p2 */ |
484 |
|
|
register PNODE *p1, *p2; |
485 |
|
|
{ |
486 |
|
|
copycolor(p2->v, p1->v); |
487 |
|
|
p2->x = p1->x; |
488 |
|
|
p2->y = p1->y; |
489 |
|
|
} |
490 |
|
|
|
491 |
|
|
|
492 |
|
|
void |
493 |
greg |
2.9 |
zoomview(vp, zf) /* zoom in or out */ |
494 |
greg |
1.17 |
register VIEW *vp; |
495 |
|
|
double zf; |
496 |
|
|
{ |
497 |
|
|
switch (vp->type) { |
498 |
|
|
case VT_PAR: /* parallel view */ |
499 |
greg |
2.9 |
vp->horiz /= zf; |
500 |
|
|
vp->vert /= zf; |
501 |
|
|
return; |
502 |
greg |
1.17 |
case VT_ANG: /* angular fisheye */ |
503 |
|
|
vp->horiz /= zf; |
504 |
greg |
2.9 |
if (vp->horiz > 360.) |
505 |
|
|
vp->horiz = 360.; |
506 |
greg |
1.17 |
vp->vert /= zf; |
507 |
greg |
2.9 |
if (vp->vert > 360.) |
508 |
|
|
vp->vert = 360.; |
509 |
|
|
return; |
510 |
|
|
case VT_CYL: /* cylindrical panorama */ |
511 |
|
|
vp->horiz /= zf; |
512 |
|
|
if (vp->horiz > 360.) |
513 |
|
|
vp->horiz = 360.; |
514 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / (PI/180./2.); |
515 |
greg |
1.17 |
return; |
516 |
|
|
case VT_PER: /* perspective view */ |
517 |
|
|
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
518 |
|
|
(PI/180./2.); |
519 |
|
|
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
520 |
|
|
(PI/180./2.); |
521 |
|
|
return; |
522 |
|
|
case VT_HEM: /* hemispherical fisheye */ |
523 |
|
|
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
524 |
|
|
if (vp->horiz >= 1.0-FTINY) |
525 |
|
|
vp->horiz = 180.; |
526 |
|
|
else |
527 |
|
|
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
528 |
|
|
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
529 |
|
|
if (vp->vert >= 1.0-FTINY) |
530 |
|
|
vp->vert = 180.; |
531 |
|
|
else |
532 |
|
|
vp->vert = asin(vp->vert) / (PI/180./2.); |
533 |
|
|
return; |
534 |
|
|
} |
535 |
greg |
1.1 |
} |