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: s1373.c,v 1.3 2001-03-19 15:58:48 afr Exp $
45 *
46 */
47
48
49 #define S1373
50
51 #include "sislP.h"
52
53 #if defined(SISLNEEDPROTOTYPES)
s1373(SISLCurve * pc1,double etop[],double eaxis[],double econe[],int idim,double aepsco,double aepsge,int * jpt,double ** gpar,int * jcrv,SISLIntcurve *** wcurve,int * jstat)54 void s1373(SISLCurve *pc1,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 s1373(pc1,etop,eaxis,econe,idim,aepsco,aepsge,jpt,gpar,jcrv,wcurve,jstat)
59 SISLCurve *pc1;
60 double etop[];
61 double eaxis[];
62 double econe[];
63 int idim;
64 double aepsco;
65 double aepsge;
66 int *jpt;
67 double **gpar;
68 int *jcrv;
69 SISLIntcurve ***wcurve;
70 int *jstat;
71 #endif
72 /*
73 *********************************************************************
74 *
75 *********************************************************************
76 *
77 * PURPOSE : Find all intersections between a curve and a cone.
78 *
79 *
80 *
81 * INPUT : pc1 - Pointer to the curve.
82 * etop - Top point on cone.
83 * eaxis - Point on the cone axis (other than top point).
84 * econe - SISLPoint on cone surface.
85 * idim - Dimension of the space in which the cone
86 * lies. idim should be equal to three.
87 * aepsco - Computational resolution.
88 * aepsge - Geometry resolution.
89 *
90 *
91 *
92 * OUTPUT : *jpt - Number of single intersection points.
93 * gpar - Array containing the parameter values of the
94 * single intersection points in the parameter
95 * interval of the curve. The points lie continuous.
96 * Intersection curves are stored in wcurve.
97 * *jcrv - Number of intersection curves.
98 * wcurve - Array containing descriptions of the intersection
99 * curves. The curves are only described by points
100 * in the parameter interval. The curve-pointers points
101 * to nothing. (See description of Intcurve
102 * in intcurve.dcl).
103 * jstat - status messages
104 * > 0 : warning
105 * = 0 : ok
106 * < 0 : error
107 *
108 *
109 * METHOD : The vertices of the curve is put into the equation of the
110 * cone achieving a curve in the one-dimentional space.
111 * The zeroes of this curve is found.
112 *
113 *
114 * REFERENCES : Main routine written by Tor Dokken, SI, 1988.
115 *
116 * CALLS : sh1373, s6err.
117 *
118 * WRITTEN BY : Christophe Rene Birkeland, SINTEF, 93-06.
119 * Revised by : Paal Fugelli, SINTEF, Oslo, Norway, Nov. 1994. Updated
120 * header to reflect that only 3D input is accepted.
121 *
122 *********************************************************************
123 */
124 {
125 int kstat = 0; /* Local status variable. */
126 int kpos = 0; /* Position of error. */
127 int trackflag = 0;
128 int jtrack;
129 SISLTrack **wtrack=SISL_NULL;
130 int *pretop=SISL_NULL;
131
132 sh1373(pc1,etop,eaxis,econe,idim,aepsco,aepsge,
133 trackflag,&jtrack,&wtrack,jpt,gpar,&pretop,jcrv,wcurve,&kstat);
134 if(kstat < 0) goto error;
135
136 if(pretop != SISL_NULL) freearray(pretop);
137
138 /*
139 * Intersections found.
140 * --------------------
141 */
142
143 *jstat = 0;
144 goto out;
145
146 /* Error in lower level routine. */
147
148 error :
149 *jstat = kstat;
150 s6err("s1373",*jstat,kpos);
151 goto out;
152
153 out:
154 return;
155 }
156