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/*
**************************************************************************
description
--------------------
copyright : (C) 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 "pmplanenormalcontrolpoint.h"
#include "pmdistancecontrolpoint.h"
#include "pmmath.h"
#include <math.h>
PMPlaneNormalControlPoint::PMPlaneNormalControlPoint( PMDistanceControlPoint* d,
const PMVector& normal, int id,
const TQString& description )
: PMControlPoint( id, description )
{
m_normal = normal;
m_pDistancePoint = d;
}
PMVector PMPlaneNormalControlPoint::position( ) const
{
return m_normal * ( m_pDistancePoint->distance( ) + 1.0 );
}
PMVector PMPlaneNormalControlPoint::extraLineStart( ) const
{
return m_normal * m_pDistancePoint->distance( );
}
PMVector PMPlaneNormalControlPoint::extraLineEnd( ) const
{
return position( );
}
void PMPlaneNormalControlPoint::graphicalChangeStarted( )
{
m_originalNormal = m_normal;
m_originalDistance = m_pDistancePoint->distance( );
}
void PMPlaneNormalControlPoint::graphicalChange( const PMVector& startPoint,
const PMVector& /*viewNormal*/,
const PMVector& endPoint )
{
PMVector p = m_originalNormal * ( m_originalDistance + 1 )
+ endPoint - startPoint;
double pabs = p.abs( );
if( !approxZero( pabs ) )
{
PMVector np = p / pabs;
double nd = m_originalNormal.abs( ) * m_originalDistance;
PMVector normal = p - np * fabs( nd );
double nl = normal.abs( );
if( !approxZero( nl ) )
{
if( ( m_originalDistance * ( pabs - fabs( nd ) ) ) < 0 )
nd = -nd;
nd /= nl;
m_pDistancePoint->setDistance( nd );
m_pDistancePoint->setDirection( normal );
m_normal = normal;
}
}
}
double PMPlaneNormalControlPoint::distance( ) const
{
return m_pDistancePoint->distance( );
}
void PMPlaneNormalControlPoint::snapToGrid( )
{
int i;
double d = moveGrid( );
if( !approxZero( d ) )
for( i = 0; i < 3; i++ )
m_normal[i] = rint( m_normal[i] / d ) * d;
setChanged( );
}
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