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94 lines
3.0 KiB
94 lines
3.0 KiB
15 years ago
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/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2001 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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**************************************************************************/
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#include "pmplanenormalcontrolpoint.h"
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#include "pmdistancecontrolpoint.h"
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#include "pmmath.h"
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#include <math.h>
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PMPlaneNormalControlPoint::PMPlaneNormalControlPoint( PMDistanceControlPoint* d,
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const PMVector& normal, int id,
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const QString& description )
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: PMControlPoint( id, description )
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{
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m_normal = normal;
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m_pDistancePoint = d;
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}
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PMVector PMPlaneNormalControlPoint::position( ) const
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{
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return m_normal * ( m_pDistancePoint->distance( ) + 1.0 );
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}
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PMVector PMPlaneNormalControlPoint::extraLineStart( ) const
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{
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return m_normal * m_pDistancePoint->distance( );
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}
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PMVector PMPlaneNormalControlPoint::extraLineEnd( ) const
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{
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return position( );
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}
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void PMPlaneNormalControlPoint::graphicalChangeStarted( )
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{
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m_originalNormal = m_normal;
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m_originalDistance = m_pDistancePoint->distance( );
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}
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void PMPlaneNormalControlPoint::graphicalChange( const PMVector& startPoint,
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const PMVector& /*viewNormal*/,
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const PMVector& endPoint )
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{
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PMVector p = m_originalNormal * ( m_originalDistance + 1 )
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+ endPoint - startPoint;
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double pabs = p.abs( );
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if( !approxZero( pabs ) )
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{
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PMVector np = p / pabs;
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double nd = m_originalNormal.abs( ) * m_originalDistance;
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PMVector normal = p - np * fabs( nd );
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double nl = normal.abs( );
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if( !approxZero( nl ) )
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{
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if( ( m_originalDistance * ( pabs - fabs( nd ) ) ) < 0 )
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nd = -nd;
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nd /= nl;
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m_pDistancePoint->setDistance( nd );
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m_pDistancePoint->setDirection( normal );
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m_normal = normal;
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}
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}
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}
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double PMPlaneNormalControlPoint::distance( ) const
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{
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return m_pDistancePoint->distance( );
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}
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void PMPlaneNormalControlPoint::snapToGrid( )
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{
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int i;
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double d = moveGrid( );
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if( !approxZero( d ) )
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for( i = 0; i < 3; i++ )
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m_normal[i] = rint( m_normal[i] / d ) * d;
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setChanged( );
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}
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