src/ot/bbox.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 *  bbox.c - routines for bounding box computation.
 */

/* ====================================================================
 * The Radiance Software License, Version 1.0
 *
 * Copyright (c) 1990 - 2002 The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory.   All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *         notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *           if any, must include the following acknowledgment:
 *             "This product includes Radiance software
 *                 (http://radsite.lbl.gov/)
 *                 developed by the Lawrence Berkeley National Laboratory
 *               (http://www.lbl.gov/)."
 *       Alternately, this acknowledgment may appear in the software itself,
 *       if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
 *       and "The Regents of the University of California" must
 *       not be used to endorse or promote products derived from this
 *       software without prior written permission. For written
 *       permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "Radiance",
 *       nor may "Radiance" appear in their name, without prior written
 *       permission of Lawrence Berkeley National Laboratory.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
 * information on Lawrence Berkeley National Laboratory, please see
 * <http://www.lbl.gov/>.
 */

#include  "standard.h"

#include  "object.h"

#include  "octree.h"

#include  "otypes.h"

#include  "face.h"

#include  "cone.h"

#include  "instance.h"


add2bbox(o, bbmin, bbmax)               /* expand bounding box to fit object */
register OBJREC  *o;
FVECT  bbmin, bbmax;
{
        CONE  *co;
        FACE  *fo;
        INSTANCE  *io;
        FVECT  v;
        register int  i, j;

        switch (o->otype) {
        case OBJ_SPHERE:
        case OBJ_BUBBLE:
                if (o->oargs.nfargs != 4)
                        objerror(o, USER, "bad arguments");
                for (i = 0; i < 3; i++) {
                        VCOPY(v, o->oargs.farg);
                        v[i] -= o->oargs.farg[3];
                        point2bbox(v, bbmin, bbmax);
                        v[i] += 2.0 * o->oargs.farg[3];
                        point2bbox(v, bbmin, bbmax);
                }
                break;
        case OBJ_FACE:
                fo = getface(o);
                j = fo->nv;
                while (j--)
                        point2bbox(VERTEX(fo,j), bbmin, bbmax);
                break;
        case OBJ_CONE:
        case OBJ_CUP:
        case OBJ_CYLINDER:
        case OBJ_TUBE:
        case OBJ_RING:
                co = getcone(o, 0);
                if (o->otype != OBJ_RING)
                        circle2bbox(CO_P0(co), co->ad, CO_R0(co), bbmin, bbmax);
                circle2bbox(CO_P1(co), co->ad, CO_R1(co), bbmin, bbmax);
                break;
        case OBJ_INSTANCE:
                io = getinstance(o, IO_BOUNDS);
                for (j = 0; j < 8; j++) {
                        for (i = 0; i < 3; i++) {
                                v[i] = io->obj->scube.cuorg[i];
                                if (j & 1<<i)
                                        v[i] += io->obj->scube.cusize;
                        }
                        multp3(v, v, io->x.f.xfm);
                        point2bbox(v, bbmin, bbmax);
                }
                break;
        }
}


point2bbox(p, bbmin, bbmax)             /* expand bounding box to fit point */
register FVECT  p, bbmin, bbmax;
{
        register int  i;

        for (i = 0; i < 3; i++) {
                if (p[i] < bbmin[i])
                        bbmin[i] = p[i];
                if (p[i] > bbmax[i])
                        bbmax[i] = p[i];
        }
}


circle2bbox(cent, norm, rad, bbmin, bbmax)      /* expand bbox to fit circle */
FVECT  cent, norm;
double  rad;
FVECT  bbmin, bbmax;
{
        FVECT  v1, v2;
        register int  i, j;

        for (i = 0; i < 3; i++) {
                v1[0] = v1[1] = v1[2] = 0;
                v1[i] = 1.0;
                fcross(v2, norm, v1);
                if (normalize(v2) == 0.0)
                        continue;
                for (j = 0; j < 3; j++)
                        v1[j] = cent[j] + rad*v2[j];
                point2bbox(v1, bbmin, bbmax);
                for (j = 0; j < 3; j++)
                        v1[j] = cent[j] - rad*v2[j];
                point2bbox(v1, bbmin, bbmax);
        }
}
Revision:	2.2
Committed:	Sat Feb 22 02:07:26 2003 UTC (21 years, 9 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.1:	+59 -5 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id$";
3	#endif
4	/*
5	* bbox.c - routines for bounding box computation.
6	*/
7
8	/* ====================================================================
9	* The Radiance Software License, Version 1.0
10	*
11	* Copyright (c) 1990 - 2002 The Regents of the University of California,
12	* through Lawrence Berkeley National Laboratory. All rights reserved.
13	*
14	* Redistribution and use in source and binary forms, with or without
15	* modification, are permitted provided that the following conditions
16	* are met:
17	*
18	* 1. Redistributions of source code must retain the above copyright
19	* notice, this list of conditions and the following disclaimer.
20	*
21	* 2. Redistributions in binary form must reproduce the above copyright
22	* notice, this list of conditions and the following disclaimer in
23	* the documentation and/or other materials provided with the
24	* distribution.
25	*
26	* 3. The end-user documentation included with the redistribution,
27	* if any, must include the following acknowledgment:
28	* "This product includes Radiance software
29	* (http://radsite.lbl.gov/)
30	* developed by the Lawrence Berkeley National Laboratory
31	* (http://www.lbl.gov/)."
32	* Alternately, this acknowledgment may appear in the software itself,
33	* if and wherever such third-party acknowledgments normally appear.
34	*
35	* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
36	* and "The Regents of the University of California" must
37	* not be used to endorse or promote products derived from this
38	* software without prior written permission. For written
39	* permission, please contact [email protected].
40	*
41	* 5. Products derived from this software may not be called "Radiance",
42	* nor may "Radiance" appear in their name, without prior written
43	* permission of Lawrence Berkeley National Laboratory.
44	*
45	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
46	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
48	* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
49	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
50	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
51	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
52	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
53	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
54	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
55	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56	* SUCH DAMAGE.
57	* ====================================================================
58	*
59	* This software consists of voluntary contributions made by many
60	* individuals on behalf of Lawrence Berkeley National Laboratory. For more
61	* information on Lawrence Berkeley National Laboratory, please see
62	* <http://www.lbl.gov/>.
63	*/
64
65	#include "standard.h"
66
67	#include "object.h"
68
69	#include "octree.h"
70
71	#include "otypes.h"
72
73	#include "face.h"
74
75	#include "cone.h"
76
77	#include "instance.h"
78
79
80	add2bbox(o, bbmin, bbmax) /* expand bounding box to fit object */
81	register OBJREC *o;
82	FVECT bbmin, bbmax;
83	{
84	CONE *co;
85	FACE *fo;
86	INSTANCE *io;
87	FVECT v;
88	register int i, j;
89
90	switch (o->otype) {
91	case OBJ_SPHERE:
92	case OBJ_BUBBLE:
93	if (o->oargs.nfargs != 4)
94	objerror(o, USER, "bad arguments");
95	for (i = 0; i < 3; i++) {
96	VCOPY(v, o->oargs.farg);
97	v[i] -= o->oargs.farg[3];
98	point2bbox(v, bbmin, bbmax);
99	v[i] += 2.0 * o->oargs.farg[3];
100	point2bbox(v, bbmin, bbmax);
101	}
102	break;
103	case OBJ_FACE:
104	fo = getface(o);
105	j = fo->nv;
106	while (j--)
107	point2bbox(VERTEX(fo,j), bbmin, bbmax);
108	break;
109	case OBJ_CONE:
110	case OBJ_CUP:
111	case OBJ_CYLINDER:
112	case OBJ_TUBE:
113	case OBJ_RING:
114	co = getcone(o, 0);
115	if (o->otype != OBJ_RING)
116	circle2bbox(CO_P0(co), co->ad, CO_R0(co), bbmin, bbmax);
117	circle2bbox(CO_P1(co), co->ad, CO_R1(co), bbmin, bbmax);
118	break;
119	case OBJ_INSTANCE:
120	io = getinstance(o, IO_BOUNDS);
121	for (j = 0; j < 8; j++) {
122	for (i = 0; i < 3; i++) {
123	v[i] = io->obj->scube.cuorg[i];
124	if (j & 1<<i)
125	v[i] += io->obj->scube.cusize;
126	}
127	multp3(v, v, io->x.f.xfm);
128	point2bbox(v, bbmin, bbmax);
129	}
130	break;
131	}
132	}
133
134
135	point2bbox(p, bbmin, bbmax) /* expand bounding box to fit point */
136	register FVECT p, bbmin, bbmax;
137	{
138	register int i;
139
140	for (i = 0; i < 3; i++) {
141	if (p[i] < bbmin[i])
142	bbmin[i] = p[i];
143	if (p[i] > bbmax[i])
144	bbmax[i] = p[i];
145	}
146	}
147
148
149	circle2bbox(cent, norm, rad, bbmin, bbmax) /* expand bbox to fit circle */
150	FVECT cent, norm;
151	double rad;
152	FVECT bbmin, bbmax;
153	{
154	FVECT v1, v2;
155	register int i, j;
156
157	for (i = 0; i < 3; i++) {
158	v1[0] = v1[1] = v1[2] = 0;
159	v1[i] = 1.0;
160	fcross(v2, norm, v1);
161	if (normalize(v2) == 0.0)
162	continue;
163	for (j = 0; j < 3; j++)
164	v1[j] = cent[j] + rad*v2[j];
165	point2bbox(v1, bbmin, bbmax);
166	for (j = 0; j < 3; j++)
167	v1[j] = cent[j] - rad*v2[j];
168	point2bbox(v1, bbmin, bbmax);
169	}
170	}