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/*
* This file is part of Chalk
*
* Copyright (c) 2006 Cyrille Berger <cberger@cberger.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "kis_perspective_grid.h"
int KisSubPerspectiveGrid::s_lastIndex = 0;
KisSubPerspectiveGrid::KisSubPerspectiveGrid(KisPerspectiveGridNodeSP topLeft, KisPerspectiveGridNodeSP topRight, KisPerspectiveGridNodeSP bottomRight, KisPerspectiveGridNodeSP bottomLeft) : m_topLeft(topLeft), m_topRight(topRight), m_bottomRight(bottomRight), m_bottomLeft(bottomLeft), m_subdivisions(5), m_leftGrid(0), m_rightGrid(0), m_topGrid(0), m_bottomGrid(0), m_index(++s_lastIndex)
{
}
bool KisSubPerspectiveGrid::tqcontains(const KisPoint p) const
{
return true;
KisPerspectiveMath::LineEquation d1 = KisPerspectiveMath::computeLineEquation( topLeft(), topRight() );
kdDebug() << p.y() << " " << (p.x() * d1.a + d1.b) << endl;
if( p.y() >= p.x() * d1.a + d1.b)
{
d1 = KisPerspectiveMath::computeLineEquation( topRight(), bottomRight() );
kdDebug() << p.y() << " " << (p.x() * d1.a + d1.b) << endl;
if( p.y() >= p.x() * d1.a + d1.b)
{
d1 = KisPerspectiveMath::computeLineEquation( bottomRight(), bottomLeft() );
kdDebug() << p.y() << " " << (p.x() * d1.a + d1.b) << endl;
if( p.y() <= p.x() * d1.a + d1.b)
{
d1 = KisPerspectiveMath::computeLineEquation( bottomLeft(), topLeft() );
kdDebug() << p.y() << " " << (p.x() * d1.a + d1.b) << endl;
if( p.y() <= p.x() * d1.a + d1.b)
{
return true;
}
}
}
}
return false;
}
KisPerspectiveGrid::KisPerspectiveGrid()
{
}
KisPerspectiveGrid::~KisPerspectiveGrid()
{
clearSubGrids( );
}
bool KisPerspectiveGrid::addNewSubGrid( KisSubPerspectiveGrid* ng )
{
if(hasSubGrids() && !ng->topGrid() && !ng->bottomGrid() && !ng->leftGrid() && !ng->rightGrid() )
{
kdError() << "sub grids need a neighbourgh if they are not the first grid to be added" << endl;
return false;
}
m_subGrids.push_back(ng);
return true;
}
void KisPerspectiveGrid::clearSubGrids( )
{
for( TQValueList<KisSubPerspectiveGrid*>::const_iterator it = begin(); it != end(); ++it)
{
delete *it;
}
m_subGrids.clear();
}
KisSubPerspectiveGrid* KisPerspectiveGrid::gridAt(KisPoint p)
{
for( TQValueList<KisSubPerspectiveGrid*>::const_iterator it = begin(); it != end(); ++it)
{
if( (*it)->tqcontains(p) )
{
return *it;
}
}
return 0;
}
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