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74 lines
3 KiB
C++
74 lines
3 KiB
C++
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/*
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#
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# File : plotter1d.cpp
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# ( C++ source file )
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#
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# Description : A simple math formula plotter.
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# This file is a part of the CImg Library project.
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# ( http://cimg.eu )
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#
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# Copyright : David Tschumperlé
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# ( http://tschumperle.users.greyc.fr/ )
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#
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# License : CeCILL v2.0
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# ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
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#
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# This software is governed by the CeCILL license under French law and
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# abiding by the rules of distribution of free software. You can use,
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# modify and/ or redistribute the software under the terms of the CeCILL
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# license as circulated by CEA, CNRS and INRIA at the following URL
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# "http://www.cecill.info".
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#
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# As a counterpart to the access to the source code and rights to copy,
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# modify and redistribute granted by the license, users are provided only
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# with a limited warranty and the software's author, the holder of the
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# economic rights, and the successive licensors have only limited
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# liability.
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#
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# In this respect, the user's attention is drawn to the risks associated
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# with loading, using, modifying and/or developing or reproducing the
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# software by the user in light of its specific status of free software,
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# that may mean that it is complicated to manipulate, and that also
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# therefore means that it is reserved for developers and experienced
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# professionals having in-depth computer knowledge. Users are therefore
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# encouraged to load and test the software's suitability as regards their
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# requirements in conditions enabling the security of their systems and/or
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# data to be ensured and, more generally, to use and operate it in the
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# same conditions as regards security.
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#
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# The fact that you are presently reading this means that you have had
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# knowledge of the CeCILL license and that you accept its terms.
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#
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*/
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// Include CImg library file and use its main namespace
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#include "CImg.h"
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using namespace cimg_library;
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// Main procedure
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//----------------
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int main(int argc,char **argv) {
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// Read command line argument.
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cimg_usage("Simple plotter of mathematical formulas");
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const char *const formula = cimg_option("-f","sin(x/8) % cos(2*x)","Formula to plot");
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const float x0 = cimg_option("-x0",-5.0f,"Minimal X-value");
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const float x1 = cimg_option("-x1",5.0f,"Maximal X-value");
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const int resolution = cimg_option("-r",1024,"Plot resolution");
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const unsigned int nresolution = resolution>1?resolution:1024;
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const unsigned int plot_type = cimg_option("-p",1,"Plot type");
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const unsigned int vertex_type = cimg_option("-v",1,"Vertex type");
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// Create plot data.
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CImg<double> values(4,nresolution,1,1,0);
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const unsigned int r = nresolution - 1;
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cimg_forY(values,X) values(0,X) = x0 + X*(x1 - x0)/r;
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cimg::eval(formula,values).move_to(values);
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// Display interactive plot window.
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values.display_graph(formula,plot_type,vertex_type,"X-axis",x0,x1,"Y-axis");
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// Quit.
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return 0;
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}
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