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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 "sisl.h"
#include "GoReadWrite.h"
using namespace std;
namespace {
string IN_FILE_CURVE_1 = "example1_curve.g2";
string IN_FILE_CURVE_2 = "example2_curve.g2";
string OUT_FILE_CURVE = "example3_curve.g2";
string DESCRIPTION =
"This program will create a 'blend curve' to connect the \n"
"endpoints of the two curves generated in the two previous \n"
"example programs. The routine used is s1606. \n"
"Input: " + IN_FILE_CURVE_1 + " and " + IN_FILE_CURVE_2 + "\n"
"Output: " + 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 stream_1(IN_FILE_CURVE_1.c_str());
ifstream stream_2(IN_FILE_CURVE_2.c_str());
if (!stream_1 || !stream_2) {
string error_message =
"Unable to open input files: " + IN_FILE_CURVE_1 +
" and " + IN_FILE_CURVE_2 + ". Are you sure you have run the "
"two previous sample programs?";
throw runtime_error(error_message.c_str());
}
SISLCurve* c1 = readGoCurve(stream_1);
SISLCurve* c2 = readGoCurve(stream_2);
double epsge = 1.0e-5; // geometric precision
int blendtype = 0; // generate polynomial segment
int dim = 3;
int order = 4;
double c1_endpoint[3]; // endpoint of curve 1 (must be calculated)
double c2_endpoint[3]; // endpoint of curve 2 (must be calculated)
// The blend curve will extend from the endpoint of curve 1 to the
// endpoint of curve 2. As input, the SISL routine needs (approximate)
// coordinates for these points on the curve. We therefore preliminarly
// need to evaluate these. For this purpose, we use SISL routine s1227.
// The end parameters of the curves' parametric domains can be found by
// looking at their knotvectors (pointed to by data member 'et').
// If the number of control points is 'n', then the knot numbered 'n'
// would represent the end parameter (when counting from 0). The number
// of control points is indicated by the data member 'in'.
double c1_endpar = c1->et[c1->in]; // end parameter of curve 1
double c2_endpar = c2->et[c2->in]; // end parameter of curve 2
int temp, jstat1, jstat2;
// evaluating endpoint positions of both curves
s1227(c1, // input curve
0, // evaluate position only (no derivatives)
c1_endpar, // end parameter
&temp, // indicates param. interval (not interesting for our purposes)
c1_endpoint, // this is what we want to calculate (3D position)
&jstat1); // status variable (0 if everything all right)
s1227(c2, // input curve
0, // evaluate position only (no derivatives)
c2_endpar, // end parameter
&temp, // indicates param. interval (not interesting for our purposes)
c2_endpoint, // this is what we want to calculate (3D position)
&jstat2); // status variable (0 if everything all right)
if (jstat1 < 0 || jstat2 < 0) {
throw runtime_error("Error occured inside call to SISL routine s1227.");
} else if (jstat1 > 0 || jstat2 > 0) {
cerr << "WARNING: warning occured inside call to SISL routine s1227.";
}
// calculating blend curve
SISLCurve* blend_curve = 0;
int jstat;
s1606(c1, // the first input curve
c2, // the second input curve
epsge, // geometric tolerance
c1_endpoint, // endpoint of curve 1 (geometric)
c2_endpoint, // endpoint of curve 2 (geometric)
blendtype, // type of blend curve (circle, conic, polynomial)
dim, // dimension (3D)
order, // order of generated spline curve
&blend_curve, // the generated curve
&jstat); // status message
if (jstat < 0) {
throw runtime_error("Error occured inside call to SISL routine s1606.");
} else if (jstat > 0) {
cerr << "WARNING: warning occured inside call to SISL routine s1606.\n" << endl;
}
ofstream os(OUT_FILE_CURVE.c_str());
if (!os) {
throw runtime_error("Unable to open output file.");
}
// write result to file
writeGoCurve(blend_curve, os);
// cleaning up
freeCurve(blend_curve);
freeCurve(c1);
freeCurve(c2);
os.close();
stream_1.close();
stream_2.close();
} catch (exception& e) {
cerr << "Exception thrown: " << e.what() << endl;
return 0;
}
return 1;
};
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