LORENE
des_vect.C
1/*
2 * Basic routine for plotting a vector field.
3 *
4 */
5
6/*
7 * Copyright (c) 2000-2001 Eric Gourgoulhon
8 *
9 * This file is part of LORENE.
10 *
11 * LORENE is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * LORENE is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with LORENE; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 */
26
27
28char des_vect_C[] = "$Header: /cvsroot/Lorene/C++/Source/Non_class_members/Graphics/des_vect.C,v 1.5 2014/10/13 08:53:23 j_novak Exp $" ;
29
30/*
31 * $Id: des_vect.C,v 1.5 2014/10/13 08:53:23 j_novak Exp $
32 * $Log: des_vect.C,v $
33 * Revision 1.5 2014/10/13 08:53:23 j_novak
34 * Lorene classes and functions now belong to the namespace Lorene.
35 *
36 * Revision 1.4 2014/10/06 15:16:05 j_novak
37 * Modified #include directives to use c++ syntax.
38 *
39 * Revision 1.3 2008/08/19 06:42:00 j_novak
40 * Minor modifications to avoid warnings with gcc 4.3. Most of them concern
41 * cast-type operations, and constant strings that must be defined as const char*
42 *
43 * Revision 1.2 2002/10/16 14:36:58 j_novak
44 * Reorganization of #include instructions of standard C++, in order to
45 * use experimental version 3 of gcc.
46 *
47 * Revision 1.1.1.1 2001/11/20 15:19:29 e_gourgoulhon
48 * LORENE
49 *
50 * Revision 2.0 2000/03/01 16:12:02 eric
51 * *** empty log message ***
52 *
53 *
54 * $Header: /cvsroot/Lorene/C++/Source/Non_class_members/Graphics/des_vect.C,v 1.5 2014/10/13 08:53:23 j_novak Exp $
55 *
56 */
57
58
59
60// C++ headers:
61#include"headcpp.h"
62
63// C headers:
64#include <cmath>
65
66// PGPLOT headers:
67#include <cpgplot.h>
68
69namespace Lorene {
70//******************************************************************************
71
72void des_vect(float* vvx, float* vvy, int nx, int ny, float xmin, float xmax,
73 float ymin, float ymax, double scale, double sizefl,
74 const char* nomx, const char* nomy, const char* title, const char* device,
75 int newgraph, int nxpage, int nypage) {
76
77
78
79 // Array defining the grid for pgvect_
80 // -----------------------------------
81 float hx = (xmax - xmin)/float(nx-1) ;
82 float hy = (ymax - ymin)/float(ny-1) ;
83
84 float tr[6] ;
85 tr[0] = xmin - hx ;
86 tr[1] = hx ;
87 tr[2] = 0 ;
88 tr[3] = ymin - hy ;
89 tr[4] = 0 ;
90 tr[5] = hy ;
91
92
93 // Determination de la taille des fleches representant les vecteurs:
94 // -----------------------------------------------------------------
95
96 if (scale < 0) { // si scale >= 0, on garde la valeur de
97 // scale donnee en argument
98 double norme_max = 0 ;
99 for(int ix = 0; ix < nx; ix++) {
100 for(int iy = 0; iy < ny; iy++) {
101 double xxx = sqrt( vvx[iy*nx+ix]*vvx[iy*nx+ix] +
102 vvy[iy*nx+ix]*vvy[iy*nx+ix] ) ;
103 norme_max = (xxx > norme_max) ? xxx : norme_max ;
104 }
105 }
106
107 if (norme_max < 1.e-14) {
108 scale = 1 ;
109 }
110 else{
111 double pas_max = (hx > hy) ? hx : hy ;
112 scale = fabs(scale) * pas_max / norme_max ;
113 }
114 cout << "des_vect: norme_max = " << norme_max << endl ;
115 cout << "des_vect: scale = " << scale << endl ;
116 }
117
118
119 // Graphics display
120 // ----------------
121
122 if ( (newgraph == 1) || (newgraph == 3) ) {
123
124 if (device == 0x0) device = "?" ;
125
126 int ier = cpgbeg(0, device, nxpage, nypage) ;
127 if (ier != 1) {
128 cout << "des_vect: problem in opening PGPLOT display !" << endl ;
129 }
130
131 }
132
133 // Taille des caracteres:
134 float size = float(1.3) ;
135 cpgsch(size) ;
136
137 // Epaisseur des traits:
138 int lepais = 1 ;
139 cpgslw(lepais) ;
140
141 // Fonte axes: caracteres romains:
142 cpgscf(2) ;
143
144 // Cadre de la figure
145 cpgenv(xmin, xmax, ymin, ymax, 1, 0 ) ;
146 cpglab(nomx,nomy,title) ;
147
148
149
150 float sizefl1 = float(sizefl) ;
151 cpgsch(sizefl1) ; // controle la taille des extremites des fleches
152
153 float blank = 0 ;
154 float scale1 = float(scale) ;
155 int nc = 1 ;
156
157 cpgvect(vvx, vvy, nx, ny, 1, nx, 1, ny, scale1, nc, tr, blank) ;
158
159 cpgsch(size) ; // restauration
160
161
162
163 // Closing the graphical output
164 // ----------------------------
165
166 if ( (newgraph == 2) || (newgraph == 3) ) {
167 cpgend() ;
168 }
169
170
171}
172}
Cmp sqrt(const Cmp &)
Square root.
Definition cmp_math.C:220
void des_vect(float *vvx, float *vvy, int nx, int ny, float xmin, float xmax, float ymin, float ymax, double scale, double sizefl, const char *nomx, const char *nomy, const char *title, const char *device=0x0, int newgraph=3, int nxpage=1, int nypage=1)
Basic routine for plotting vector field.
Lorene prototypes.
Definition app_hor.h:64