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/*
Copyright (C) 2001-2003 KSVG Team
This file is part of the KDE project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <math.h>
#include <cfloat>
#include <kdebug.h>
#include "SVGRectImpl.h"
#include "SVGPointListImpl.h"
#include "SVGSVGElementImpl.h"
#include "SVGPolyElementImpl.h"
#include "SVGAngleImpl.h"
using namespace KSVG;
SVGPolyElementImpl::SVGPolyElementImpl(DOM::ElementImpl *impl) : SVGShapeImpl(impl), SVGTestsImpl(), SVGLangSpaceImpl(), SVGExternalResourcesRequiredImpl(), SVGStylableImpl(this), SVGTransformableImpl(), SVGAnimatedPointsImpl()
{
}
SVGPolyElementImpl::~SVGPolyElementImpl()
{
}
SVGRectImpl *SVGPolyElementImpl::getBBox()
{
SVGRectImpl *ret = SVGSVGElementImpl::createSVGRect();
unsigned int nrPoints = points()->numberOfItems();
float minx, miny, maxx, maxy, tempx, tempy;
minx = points()->getItem(0)->x();
miny = points()->getItem(0)->y();
maxx = points()->getItem(0)->x();
maxy = points()->getItem(0)->y();
for(unsigned int i = 1; i < nrPoints; ++i)
{
tempx = points()->getItem(i)->x();
tempy = points()->getItem(i)->y();
if(tempx < minx)
minx = tempx;
if(tempx > maxx)
maxx = tempx;
if(tempy < miny)
miny = tempy;
if(tempy > maxy)
maxy = tempy;
}
ret->setX(minx);
ret->setY(miny);
ret->setWidth(maxx - minx);
ret->setHeight(maxy - miny);
return ret;
}
bool SVGPolyElementImpl::findOutSlope(unsigned int point, double *outSlope) const
{
unsigned int nextPoint;
if(point == points()->numberOfItems() - 1)
{
if(m_isOpenPath)
return false;
else
nextPoint = 0;
}
else
nextPoint = point + 1;
if(point == nextPoint)
return false;
double x = points()->getItem(point)->x();
double y = points()->getItem(point)->y();
double nextX = points()->getItem(nextPoint)->x();
double nextY = points()->getItem(nextPoint)->y();
const double epsilon = DBL_EPSILON;
if(fabs(x - nextX) < epsilon && fabs(y - nextY) < epsilon)
return findOutSlope(nextPoint, outSlope);
else
{
double slope = SVGAngleImpl::todeg(atan2(nextY - y, nextX - x));
*outSlope = slope;
return true;
}
}
bool SVGPolyElementImpl::findInSlope(unsigned int point, double *inSlope) const
{
unsigned int prevPoint;
if(point == 0)
{
if(m_isOpenPath)
return false;
else
prevPoint = points()->numberOfItems() - 1;
}
else
prevPoint = point - 1;
if(point == prevPoint)
return false;
double x = points()->getItem(point)->x();
double y = points()->getItem(point)->y();
double prevX = points()->getItem(prevPoint)->x();
double prevY = points()->getItem(prevPoint)->y();
const double epsilon = DBL_EPSILON;
if(fabs(x - prevX) < epsilon && fabs(y - prevY) < epsilon)
return findInSlope(prevPoint, inSlope);
else
{
double slope = SVGAngleImpl::todeg(atan2(y - prevY, x - prevX));
*inSlope = slope;
return true;
}
}
// vim:ts=4:noet
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