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/*
* Copyright (C) 1998, 2000-2007, 2010, 2011, 2012, 2013 SINTEF ICT,
* Applied Mathematics, Norway.
*
* Contact information: E-mail: tor.dokken@sintef.no
* SINTEF ICT, Department of Applied Mathematics,
* P.O. Box 124 Blindern,
* 0314 Oslo, Norway.
*
* This file is part of SISL.
*
* SISL is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* SISL 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with SISL. If not, see
* <http://www.gnu.org/licenses/>.
*
* In accordance with Section 7(b) of the GNU Affero General Public
* License, a covered work must retain the producer line in every data
* file that is created or manipulated using SISL.
*
* Other Usage
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the SISL library without
* disclosing the source code of your own applications.
*
* This file may be used in accordance with the terms contained in a
* written agreement between you and SINTEF ICT.
*/
#include <iostream>
#include <fstream>
#include <string>
#include <stdexcept>
#include <cstdlib>
#include "sisl.h"
#include "GoReadWrite.h"
using namespace std;
namespace {
string IN_FILE_SURFACE_1 = "example10_surf.g2";
string IN_FILE_SURFACE_2 = "example11_surf.g2";
string OUT_FILE_CURVE = "example13_isectcurves.g2";
string DESCRIPTION =
//==========================================================
"This program computes the intersection curves between two \n"
"surfaces. The two surfaces used have been generated by \n"
"earlier example programs (example10 and example11), so you\n"
"should run these first. The filenames for these surfaces \n"
"are '" + IN_FILE_SURFACE_1 + "' and '" + IN_FILE_SURFACE_2 +
"'. \n The resulting curves will be written to the file \n'"
+ OUT_FILE_CURVE + "'.\n\n";
//==========================================================
}; // end anonymous namespace
//===========================================================================
int main(int avnum, char** vararg)
//===========================================================================
{
cout << '\n' << vararg[0] << ":\n" << DESCRIPTION << endl;
cout << "To proceed, press enter, or ^C to quit." << endl;
getchar();
try {
ifstream is_sf1(IN_FILE_SURFACE_1.c_str());
ifstream is_sf2(IN_FILE_SURFACE_2.c_str());
if (!is_sf1 || !is_sf2) {
throw runtime_error("Could not open input files. Hav you run "
"the necessary example programs? (example10 "
"and example11).");
}
ofstream os(OUT_FILE_CURVE.c_str());
if (!os) {
throw runtime_error("Unable to open output file.");
}
// reading surfaces
SISLSurf* surf_1 = readGoSurface(is_sf1);
SISLSurf* surf_2 = readGoSurface(is_sf2);
// detecting (but not tracing out) intersection curves
double epsco = 1.0e-15; // computational epsilon
double epsge = 1.0e-5; // geometric tolerance
int num_int_points = 0; // number of detected intersection points
double* intpar_surf_1 = 0; // parameter values for the surface in the intersections
double* intpar_surf_2 = 0; // parameter values for the curve in the intersections
int num_int_curves = 0; // number of intersection curves
SISLIntcurve** intcurve = 0; // pointer to array of detected intersection curves
int jstat; // status variable
// calculating topology of intersections
s1859(surf_1, // the first surface
surf_2, // the second surface
epsco, // computational resolution
epsge, // geometry resolution
&num_int_points, // number of single intersection points
&intpar_surf_1, // pointer to array of parameter values for surface 1
&intpar_surf_2, // -"- for surface 2
&num_int_curves, // number of detected intersection curves
&intcurve, // pointer to array of detected intersection curves.
&jstat); // status variable
if (jstat < 0) {
throw runtime_error("Error occured inside call to SISL routine s1859.");
} else if (jstat > 0) {
cerr << "WARNING: warning occured inside call to SISL routine s1859. \n"
<< endl;
}
// In this example, we expect to detect two intersection curves, but no isolated
// intersection points.
cout << "Number of intersection points detected: " << num_int_points << endl;
cout << "Number of intersection curves detected: " << num_int_curves << endl;
// evaluating (tracing out) intersection curves and writing them to file
int i;
for (i = 0; i < num_int_curves; ++i) {
s1310(surf_1, // the first surface
surf_2, // the second surface
intcurve[i], // pointer to the intersection curve object
epsge, // geometric tolerance
double(0), // maximum step size (ignored if <= 0)
1, // make only 3D curve (no 2D curve in parametric domain)
0, // don't draw the curve
&jstat);
if (jstat < 0) {
throw runtime_error("Error occured inside call to SISL routine s1310.");
} else if (jstat == 3) {
throw runtime_error("Iteration stopped due to singular point or degenerate "
"surface.");
}
writeGoCurve(intcurve[i]->pgeom, os);
}
// cleaning up
freeSurf(surf_1);
freeSurf(surf_2);
is_sf1.close();
is_sf2.close();
os.close();
free(intpar_surf_1);
free(intpar_surf_2);
for (i = 0; i < num_int_curves; ++i) {
freeIntcurve(intcurve[i]);
}
free(intcurve);
} catch (exception& e) {
cerr << "Exception thrown: " << e.what() << endl;
return 0;
}
return 1;
};
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