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Tina6/tina-libs/tina/geometry/geomCurve_cone.c

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  1 /**********
  2  * 
  3  * This file is part of the TINA Open Source Image Analysis Environment
  4  * henceforth known as TINA
  5  *
  6  * TINA is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License as 
  8  * published by the Free Software Foundation.
  9  *
 10  * TINA is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with TINA; if not, write to the Free Software Foundation, Inc., 
 17  * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 18  *
 19  * ANY users of TINA who require exemption from the existing licence must
 20  * negotiate a new licence with Dr. Neil.A.Thacker, the sole agent for
 21  * the University of Manchester.
 22  *
 23  **********
 24  * 
 25  * Program :    TINA
 26  * File    :  $Source: /home/tina/cvs/tina-libs/tina/geometry/geomCurve_cone.c,v $
 27  * Date    :  $Date: 2005/01/09 17:49:25 $
 28  * Version :  $Revision: 1.2 $
 29  * CVS Id  :  $Id: geomCurve_cone.c,v 1.2 2005/01/09 17:49:25 paul Exp $
 30  *
 31  * Author  : Legacy TINA
 32  *
 33  * Notes : functions for manipulating generic cones
 34  *
 35  *********
 36 */
 37 
 38 #include "geomCurve_cone.h"
 39 
 40 #if HAVE_CONFIG_H
 41   #include <config.h>
 42 #endif
 43 
 44 #include <math.h>
 45 #include <string.h>
 46 #include <tina/sys/sysDef.h>
 47 #include <tina/sys/sysPro.h>
 48 #include <tina/math/mathDef.h>
 49 #include <tina/math/mathPro.h>
 50 #include <tina/geometry/geom_CurveDef.h>
 51 #include <tina/geometry/geomCurve_conic3.h>
 52 #ifdef _PCC
 53 #include <memory.h>
 54 #endif
 55 
 56 Cone   *cone_alloc(int type)
 57 {
 58     Cone   *cone = ts_ralloc(Cone);
 59 
 60     cone->type = type;
 61     cone->label = new_label();
 62     cone->c1 = cone->c2 = NULL;
 63     cone->offset = 0;
 64     cone->props = NULL;
 65     return (cone);
 66 }
 67 
 68 Cone   *cone_make(Conic3 * c1, Conic3 * c2, double offset, int type)
 69 {
 70     Cone   *cone = ts_ralloc(Cone);
 71 
 72     cone->type = type;
 73     cone->label = new_label();
 74     cone->c1 = c1;
 75     cone->c2 = c2;
 76     cone->offset = offset;
 77     cone->props = NULL;
 78     return (cone);
 79 }
 80 
 81 void    cone_free(Cone * cone)
 82 {
 83     if (cone == NULL)
 84         return;
 85     proplist_freelist(cone->props);
 86     conic3_free(cone->c1);
 87     conic3_free(cone->c2);
 88     rfree((void *) cone);
 89 }
 90 
 91 Cone   *cone_copy(Cone * cone)
 92 {
 93     Cone   *copy;
 94     List   *proplist_copy();
 95 
 96     if (cone == NULL)
 97         return (NULL);
 98 
 99     copy = ts_ralloc(Cone);
100     (void) memcpy((char *) copy, (char *) cone, sizeof(Cone));
101     copy->c1 = conic3_copy(cone->c1);
102     copy->c2 = conic3_copy(cone->c2);
103     copy->props = proplist_copy(cone->props);
104     return (copy);
105 }
106 
107 Vec3    cone_point(Cone * cone, double u, double t)
108 
109 /* cone parameters */
110 {
111     Vec3    p1 = {Vec3_id};
112     Vec3    p2 = {Vec3_id};
113 
114     p1 = conic3_point(cone->c1, t);
115     p2 = conic3_point(cone->c2, t + cone->offset);
116 
117     return (vec3_sum(vec3_times(1 - u, p1), vec3_times(u, p2)));
118 }
119 

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