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// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* LPE Construct Grid implementation
*/
/*
* Authors:
* Johan Engelen
*
* Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.nl>
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "live_effects/lpe-constructgrid.h"
// TODO due to internal breakage in glibmm headers, this must be last:
#include <glibmm/i18n.h>
namespace Inkscape {
namespace LivePathEffect {
using namespace Geom;
LPEConstructGrid::LPEConstructGrid(LivePathEffectObject *lpeobject) :
Effect(lpeobject),
nr_x(_("Size _X:"), _("The size of the grid in X direction."), "nr_x", &wr, this, 5),
nr_y(_("Size _Y:"), _("The size of the grid in Y direction."), "nr_y", &wr, this, 5)
{
registerParameter(&nr_x);
registerParameter(&nr_y);
nr_x.param_make_integer();
nr_y.param_make_integer();
nr_x.param_set_range(1, 1e10);
nr_y.param_set_range(1, 1e10);
}
LPEConstructGrid::~LPEConstructGrid()
= default;
Geom::PathVector
LPEConstructGrid::doEffect_path (Geom::PathVector const & path_in)
{
// Check that the path has at least 3 nodes (i.e. 2 segments), more nodes are ignored
if (path_in[0].size() >= 2) {
// read the first 3 nodes:
Geom::Path::const_iterator it ( path_in[0].begin() );
Geom::Point first_p = (*it++).initialPoint();
Geom::Point origin = (*it++).initialPoint();
Geom::Point second_p = (*it++).initialPoint();
// make first_p and second_p be the construction *vectors* of the grid:
first_p -= origin;
second_p -= origin;
Geom::Translate first_translation( first_p );
Geom::Translate second_translation( second_p );
// create the gridpaths of the two directions
Geom::Path first_path( origin );
first_path.appendNew<LineSegment>( origin + first_p*nr_y );
Geom::Path second_path( origin );
second_path.appendNew<LineSegment>( origin + second_p*nr_x );
// use the gridpaths and set them in the correct grid
Geom::PathVector path_out;
path_out.push_back(first_path);
for (int ix = 0; ix < nr_x; ix++) {
path_out.push_back(path_out.back() * second_translation );
}
path_out.push_back(second_path);
for (int iy = 0; iy < nr_y; iy++) {
path_out.push_back(path_out.back() * first_translation );
}
return path_out;
} else {
return path_in;
}
}
} //namespace LivePathEffect
} /* namespace Inkscape */
/*
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: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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