1 /*
2 * Copyright (C) 1998, 2000-2007, 2010, 2011, 2012, 2013 SINTEF ICT,
3 * Applied Mathematics, Norway.
4 *
5 * Contact information: E-mail: tor.dokken@sintef.no
6 * SINTEF ICT, Department of Applied Mathematics,
7 * P.O. Box 124 Blindern,
8 * 0314 Oslo, Norway.
9 *
10 * This file is part of SISL.
11 *
12 * SISL is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU Affero General Public License as
14 * published by the Free Software Foundation, either version 3 of the
15 * License, or (at your option) any later version.
16 *
17 * SISL is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Affero General Public License for more details.
21 *
22 * You should have received a copy of the GNU Affero General Public
23 * License along with SISL. If not, see
24 * <http://www.gnu.org/licenses/>.
25 *
26 * In accordance with Section 7(b) of the GNU Affero General Public
27 * License, a covered work must retain the producer line in every data
28 * file that is created or manipulated using SISL.
29 *
30 * Other Usage
31 * You can be released from the requirements of the license by purchasing
32 * a commercial license. Buying such a license is mandatory as soon as you
33 * develop commercial activities involving the SISL library without
34 * disclosing the source code of your own applications.
35 *
36 * This file may be used in accordance with the terms contained in a
37 * written agreement between you and SINTEF ICT.
38 */
39
40 #include "sisl-copyright.h"
41
42 /*
43 *
44 * $Id: s1854.c,v 1.2 2001-03-19 15:58:54 afr Exp $
45 *
46 */
47
48
49 #define S1854
50
51 #include "sislP.h"
52
53 #if defined(SISLNEEDPROTOTYPES)
s1854(SISLSurf * ps1,double etop[],double eaxis[],double econe[],int idim,double aepsco,double aepsge,int * jpt,double ** gpar,int * jcrv,SISLIntcurve *** wcurve,int * jstat)54 void s1854(SISLSurf *ps1,double etop[],double eaxis[],double econe[],int idim,
55 double aepsco,double aepsge,
56 int *jpt,double **gpar,int *jcrv,SISLIntcurve ***wcurve,int *jstat)
57 #else
58 void s1854(ps1,etop,eaxis,econe,idim,aepsco,aepsge,
59 jpt,gpar,jcrv,wcurve,jstat)
60 SISLSurf *ps1;
61 double etop[];
62 double eaxis[];
63 double econe[];
64 int idim;
65 double aepsco;
66 double aepsge;
67 int *jpt;
68 double **gpar;
69 int *jcrv;
70 SISLIntcurve ***wcurve;
71 int *jstat;
72 #endif
73 /*
74 *********************************************************************
75 *
76 *********************************************************************
77 *
78 * PURPOSE : Find all intersections between a tensor-product surface
79 * and a cone.
80 *
81 *
82 *
83 * INPUT : ps1 - Pointer to surface.
84 * etop - Top point of the cone.
85 * eaxis - SISLPoint on the axis of the cone. eaxis is not
86 * equal to etop.
87 * econe - SISLPoint on the cone surface. econe is not equal
88 * to etop.
89 * idim - Dimension of the space in which the cone lies.
90 * aepsco - Computational resolution.
91 * aepsge - Geometry resolution.
92 *
93 *
94 *
95 * OUTPUT : *jpt - Number of single intersection points.
96 * gpar - Array containing the parameter values of the
97 * single intersection points in the parameter
98 * plane of the surface. The points lie continuous.
99 * Intersection curves are stored in wcurve.
100 * *jcrv - Number of intersection curves.
101 * wcurve - Array containing descriptions of the intersection
102 * curves. The curves are only described by points
103 * in the parameter plane. The curve-pointers points
104 * to nothing. (See description of Intcurve
105 * in intcurve.dcl).
106 * jstat - status messages
107 * > 0 : warning
108 * = 0 : ok
109 * < 0 : error
110 *
111 *
112 * METHOD : The vertices of the surface are put into the equation of
113 * the cone achieving a surface in the one-dimentional space.
114 * Then the zeroes of this surface is found.
115 *
116 *
117 * REFERENCES : Main routine written by Vibeke Skytt, SI, 1988.
118 *
119 * CALLS : sh1854, s6err.
120 *
121 * WRITTEN BY : Christophe Rene Birkeland, SINTEF, 93-06.
122 *
123 *********************************************************************
124 */
125 {
126 int kstat = 0; /* Local status variable. */
127 int kpos = 0; /* Position of error. */
128 int i;
129 int trackflag = 0;
130 int jtrack;
131 SISLTrack **wtrack=SISL_NULL;
132 int jsurf;
133 SISLIntsurf **wsurf=SISL_NULL;
134 int *pretop=SISL_NULL;
135
136 sh1854(ps1,etop,eaxis,econe,idim,aepsco,aepsge,trackflag,&jtrack,
137 &wtrack,jpt,gpar,&pretop,jcrv,wcurve,&jsurf,&wsurf,&kstat);
138 if(kstat < 0) goto error;
139
140 if(pretop != SISL_NULL) freearray(pretop);
141
142 for(i=0; i<jsurf; i++)
143 freeIntsurf(wsurf[i]);
144 if(wsurf != SISL_NULL) freearray(wsurf);
145
146 if(jsurf > 0)
147 *jstat=10;
148 else
149 *jstat = 0;
150 goto out;
151
152 /* Error in lower level routine. */
153
154 error:
155 *jstat = kstat;
156 s6err("s1854",*jstat,kpos);
157 goto out;
158
159 out:
160 return;
161 }
162