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/**
* \file lpe-test.cpp
* \brief Example file showing how to write an Inkscape Live Path Effect toy.
*/
/*
* Copyright 2009 Johan Engelen <goejendaagh@zonnet.nl>
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
*/
#include <toys/lpe-framework.h>
// This is usually very bad practice: don't do it in your LPE
using std::vector;
using namespace Geom;
using namespace std;
class LPETest: public LPEToy {
public:
LPETest() {
concatenate_before_pwd2 = false;
}
Geom::Piecewise<Geom::D2<Geom::SBasis> >
doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in) override
{
using namespace Geom;
Piecewise<D2<SBasis> > pwd2_out = pwd2_in;
Point vector(50,100);
// generate extrusion bottom: (just a copy of original path, displaced a bit)
pwd2_out.concat( pwd2_in + vector );
// generate connecting lines (the 'sides' of the extrusion)
Path path(Point(0.,0.));
path.appendNew<Geom::LineSegment>( vector );
Piecewise<D2<SBasis> > connector = path.toPwSb();
// connecting lines should be put at cusps
Piecewise<D2<SBasis> > deriv = derivative(pwd2_in);
std::vector<double> cusps; // = roots(deriv);
for (double cusp : cusps) {
pwd2_out.concat( connector + pwd2_in.valueAt(cusp) );
}
// connecting lines should be put where the tangent of the path equals the extrude_vector in direction
std::vector<double> rts = roots(dot(deriv, rot90(vector)));
for (double rt : rts) {
pwd2_out.concat( connector + pwd2_in.valueAt(rt) );
}
return pwd2_out;
}
};
int main(int argc, char **argv) {
init(argc, argv, new LPETest);
return 0;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
//vim:expandtab:shiftwidth = 4:tabstop = 8:softtabstop = 4:encoding = utf-8:textwidth = 99 :
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