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/*
**************************************************************************
description
--------------------
copyright : (C) 2000-2001 by Andreas Zehender
email : zehender@kde.org
**************************************************************************
**************************************************************************
* *
* 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. *
* *
**************************************************************************/
#include "pmdistancecontrolpoint.h"
#include "pmmath.h"
#include "pmdebug.h"
#include <math.h>
PMDistanceControlPoint::PMDistanceControlPoint( PMControlPoint* base,
const PMVector& direction, double distance,
int id, const QString& description,
bool showExtraLine )
: PMControlPoint( id, description )
{
m_distance = distance;
m_pBasePoint = base;
m_direction = direction;
m_directionLength = direction.abs( );
m_extraLine = showExtraLine;
}
PMDistanceControlPoint::PMDistanceControlPoint( const PMVector& base,
const PMVector& direction, double distance,
int id, const QString& description,
bool showExtraLine )
: PMControlPoint( id, description )
{
m_distance = distance;
m_constBasePoint = base;
m_pBasePoint = 0;
m_direction = direction;
m_directionLength = direction.abs( );
m_extraLine = showExtraLine;
}
PMVector PMDistanceControlPoint::position( ) const
{
if( m_pBasePoint )
return m_pBasePoint->position( ) + m_direction * m_distance;
return m_constBasePoint + m_direction * m_distance;
}
PMVector PMDistanceControlPoint::basePoint( ) const
{
if( m_pBasePoint )
return m_pBasePoint->position( );
return m_constBasePoint;
}
void PMDistanceControlPoint::setDirection( const PMVector& direction )
{
m_direction = direction;
m_directionLength = direction.abs( );
}
void PMDistanceControlPoint::graphicalChangeStarted( )
{
m_originalDistance = m_distance;
}
void PMDistanceControlPoint::graphicalChange( const PMVector& startPoint,
const PMVector& /*viewNormal*/,
const PMVector& endPoint )
{
if( !approxZero( m_directionLength ) )
m_distance = m_originalDistance +
PMVector::dot( endPoint - startPoint, m_direction )
/ ( m_directionLength * m_directionLength );
}
void PMDistanceControlPoint::snapToGrid( )
{
double d = moveGrid( );
if( !approxZero( d ) )
m_distance = rint( m_distance / d ) * d;
setChanged( );
}
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