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142 lines
3.5 KiB
142 lines
3.5 KiB
/*
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Copyright (C) 2001-2003 KSVG Team
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This file is part of the KDE project
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <math.h>
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#include <cfloat>
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#include <kdebug.h>
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#include "SVGRectImpl.h"
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#include "SVGPointListImpl.h"
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#include "SVGSVGElementImpl.h"
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#include "SVGPolyElementImpl.h"
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#include "SVGAngleImpl.h"
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using namespace KSVG;
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SVGPolyElementImpl::SVGPolyElementImpl(DOM::ElementImpl *impl) : SVGShapeImpl(impl), SVGTestsImpl(), SVGLangSpaceImpl(), SVGExternalResourcesRequiredImpl(), SVGStylableImpl(this), SVGTransformableImpl(), SVGAnimatedPointsImpl()
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{
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}
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SVGPolyElementImpl::~SVGPolyElementImpl()
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{
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}
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SVGRectImpl *SVGPolyElementImpl::getBBox()
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{
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SVGRectImpl *ret = SVGSVGElementImpl::createSVGRect();
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unsigned int nrPoints = points()->numberOfItems();
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float minx, miny, maxx, maxy, tempx, tempy;
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minx = points()->getItem(0)->x();
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miny = points()->getItem(0)->y();
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maxx = points()->getItem(0)->x();
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maxy = points()->getItem(0)->y();
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for(unsigned int i = 1; i < nrPoints; ++i)
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{
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tempx = points()->getItem(i)->x();
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tempy = points()->getItem(i)->y();
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if(tempx < minx)
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minx = tempx;
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if(tempx > maxx)
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maxx = tempx;
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if(tempy < miny)
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miny = tempy;
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if(tempy > maxy)
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maxy = tempy;
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}
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ret->setX(minx);
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ret->setY(miny);
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ret->setWidth(maxx - minx);
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ret->setHeight(maxy - miny);
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return ret;
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}
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bool SVGPolyElementImpl::findOutSlope(unsigned int point, double *outSlope) const
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{
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unsigned int nextPoint;
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if(point == points()->numberOfItems() - 1)
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{
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if(m_isOpenPath)
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return false;
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else
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nextPoint = 0;
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}
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else
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nextPoint = point + 1;
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if(point == nextPoint)
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return false;
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double x = points()->getItem(point)->x();
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double y = points()->getItem(point)->y();
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double nextX = points()->getItem(nextPoint)->x();
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double nextY = points()->getItem(nextPoint)->y();
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const double epsilon = DBL_EPSILON;
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if(fabs(x - nextX) < epsilon && fabs(y - nextY) < epsilon)
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return findOutSlope(nextPoint, outSlope);
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else
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{
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double slope = SVGAngleImpl::todeg(atan2(nextY - y, nextX - x));
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*outSlope = slope;
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return true;
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}
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}
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bool SVGPolyElementImpl::findInSlope(unsigned int point, double *inSlope) const
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{
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unsigned int prevPoint;
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if(point == 0)
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{
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if(m_isOpenPath)
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return false;
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else
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prevPoint = points()->numberOfItems() - 1;
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}
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else
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prevPoint = point - 1;
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if(point == prevPoint)
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return false;
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double x = points()->getItem(point)->x();
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double y = points()->getItem(point)->y();
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double prevX = points()->getItem(prevPoint)->x();
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double prevY = points()->getItem(prevPoint)->y();
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const double epsilon = DBL_EPSILON;
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if(fabs(x - prevX) < epsilon && fabs(y - prevY) < epsilon)
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return findInSlope(prevPoint, inSlope);
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else
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{
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double slope = SVGAngleImpl::todeg(atan2(y - prevY, x - prevX));
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*inSlope = slope;
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return true;
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}
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}
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// vim:ts=4:noet
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