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103 lines
2.7 KiB
103 lines
2.7 KiB
/*
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* This file is part of Chalk
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*
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* Copyright (c) 2005 Michael Thaler <michael.thaler@physik.tu-muenchen.de>
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*
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* ported from Gimp, Copyright (C) 1997 Eiichi Takamori <taka@ma1.seikyou.ne.jp>
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* original pixelize.c for GIMP 0.54 by Tracy Scott
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <math.h>
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#include <tqvaluevector.h>
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#include <kis_point.h>
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#include "kis_polygon.h"
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void KisPolygon::addPoint(double x, double y)
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{
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KisPoint point(x, y);
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append(point);
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}
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void KisPolygon::rotate(double theta)
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{
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double ct, st, ox, oy;
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ct = cos( theta );
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st = sin( theta );
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KisPointVector::iterator it;
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for( it = begin(); it != end(); ++it )
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{
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ox = (*it).x();
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oy = (*it).y();
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(*it).setX( ct * ox - st * oy );
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(*it).setY( st * ox + ct * oy );
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}
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}
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void KisPolygon::translate(double tx, double ty)
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{
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KisPointVector::iterator it;
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for( it = begin(); it != end(); ++it )
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{
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(*it).setX( (*it).x() + tx );
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(*it).setY( (*it).y() + ty );
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}
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}
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TQ_INT32 KisPolygon::extents (double& x1, double& y1, double& x2, double& y2)
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{
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if ( empty() )
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{
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return 0;
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}
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x1 = x2 = front().x();
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y1 = y2 = front().y();
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KisPointVector::iterator it;
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for( it = begin(); it != end(); ++it )
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{
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if ((*it).x() < x1)
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{
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x1 = (*it).x();
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}
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if ((*it).x() > x2)
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{
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x2 = (*it).x();
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}
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if ((*it).y() < y1)
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{
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y1 = (*it).y();
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}
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if ((*it).y() > y2)
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{
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y2 = (*it).y();
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}
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}
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return 1;
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}
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TQ_INT32 KisPolygon::numberOfPoints()
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{
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return count();
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}
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