des_vect.C
/*
* Basic routine for plotting a vector field.
*
*/
/*
* Copyright (c) 2000-2001 Eric Gourgoulhon
*
* This file is part of LORENE.
*
* LORENE is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* LORENE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LORENE; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
char 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 $" ;
/*
* $Id: des_vect.C,v 1.5 2014/10/13 08:53:23 j_novak Exp $
* $Log: des_vect.C,v $
* Revision 1.5 2014/10/13 08:53:23 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.4 2014/10/06 15:16:05 j_novak
* Modified #include directives to use c++ syntax.
*
* Revision 1.3 2008/08/19 06:42:00 j_novak
* Minor modifications to avoid warnings with gcc 4.3. Most of them concern
* cast-type operations, and constant strings that must be defined as const char*
*
* Revision 1.2 2002/10/16 14:36:58 j_novak
* Reorganization of #include instructions of standard C++, in order to
* use experimental version 3 of gcc.
*
* Revision 1.1.1.1 2001/11/20 15:19:29 e_gourgoulhon
* LORENE
*
* Revision 2.0 2000/03/01 16:12:02 eric
* *** empty log message ***
*
*
* $Header: /cvsroot/Lorene/C++/Source/Non_class_members/Graphics/des_vect.C,v 1.5 2014/10/13 08:53:23 j_novak Exp $
*
*/
// C++ headers:
#include"headcpp.h"
// C headers:
#include <cmath>
// PGPLOT headers:
#include <cpgplot.h>
namespace Lorene {
//******************************************************************************
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,
int newgraph, int nxpage, int nypage) {
// Array defining the grid for pgvect_
// -----------------------------------
float hx = (xmax - xmin)/float(nx-1) ;
float hy = (ymax - ymin)/float(ny-1) ;
float tr[6] ;
tr[0] = xmin - hx ;
tr[1] = hx ;
tr[2] = 0 ;
tr[3] = ymin - hy ;
tr[4] = 0 ;
tr[5] = hy ;
// Determination de la taille des fleches representant les vecteurs:
// -----------------------------------------------------------------
if (scale < 0) { // si scale >= 0, on garde la valeur de
// scale donnee en argument
double norme_max = 0 ;
for(int ix = 0; ix < nx; ix++) {
for(int iy = 0; iy < ny; iy++) {
double xxx = sqrt( vvx[iy*nx+ix]*vvx[iy*nx+ix] +
vvy[iy*nx+ix]*vvy[iy*nx+ix] ) ;
norme_max = (xxx > norme_max) ? xxx : norme_max ;
}
}
if (norme_max < 1.e-14) {
scale = 1 ;
}
else{
double pas_max = (hx > hy) ? hx : hy ;
scale = fabs(scale) * pas_max / norme_max ;
}
cout << "des_vect: norme_max = " << norme_max << endl ;
cout << "des_vect: scale = " << scale << endl ;
}
// Graphics display
// ----------------
if ( (newgraph == 1) || (newgraph == 3) ) {
if (device == 0x0) device = "?" ;
int ier = cpgbeg(0, device, nxpage, nypage) ;
if (ier != 1) {
cout << "des_vect: problem in opening PGPLOT display !" << endl ;
}
}
// Taille des caracteres:
float size = float(1.3) ;
cpgsch(size) ;
// Epaisseur des traits:
int lepais = 1 ;
cpgslw(lepais) ;
// Fonte axes: caracteres romains:
cpgscf(2) ;
// Cadre de la figure
cpgenv(xmin, xmax, ymin, ymax, 1, 0 ) ;
cpglab(nomx,nomy,title) ;
float sizefl1 = float(sizefl) ;
cpgsch(sizefl1) ; // controle la taille des extremites des fleches
float blank = 0 ;
float scale1 = float(scale) ;
int nc = 1 ;
cpgvect(vvx, vvy, nx, ny, 1, nx, 1, ny, scale1, nc, tr, blank) ;
cpgsch(size) ; // restauration
// Closing the graphical output
// ----------------------------
if ( (newgraph == 2) || (newgraph == 3) ) {
cpgend() ;
}
}
}
Lorene::sqrt
Cmp sqrt(const Cmp &)
Square root.
Definition cmp_math.C:220
Lorene
Lorene prototypes.
Definition app_hor.h:64