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79 lines
2.6 KiB
79 lines
2.6 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) 2000-2001 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 "pmrotatecontrolpoint.h"
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#include "pmmath.h"
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#include "pmdebug.h"
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#include <klocale.h>
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#include <math.h>
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const double precision = 0.1;
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PMRotateControlPoint::PMRotateControlPoint( const PMVector& rot, int id )
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: PMControlPoint( id, i18n( "Rotation" ) )
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{
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m_rotation = rot;
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}
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void PMRotateControlPoint::graphicalChangeStarted( )
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{
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m_originalRotation = m_rotation;
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m_originalTransformation =
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PMMatrix::rotation( deg2Rad( m_rotation.x( ) ),
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deg2Rad( m_rotation.y( ) ),
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deg2Rad( m_rotation.z( ) ) );
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}
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void PMRotateControlPoint::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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double a, x, y, z;
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a = PMVector::angle( startPoint, endPoint );
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if( !approxZero( a ) )
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{
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PMMatrix m;
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if( !approx( a, M_PI ) )
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{
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PMVector n = PMVector::cross( startPoint, endPoint );
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m = PMMatrix::rotation( n, a )
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* m_originalTransformation;
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}
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else
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m = PMMatrix::rotation( viewNormal, M_PI )
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* m_originalTransformation;
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m.toRotation( &x, &y, &z );
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m_rotation[0] = rint( rad2Deg( x ) / precision ) * precision;
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m_rotation[1] = rint( rad2Deg( y ) / precision ) * precision;
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m_rotation[2] = rint( rad2Deg( z ) / precision ) * precision;
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}
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}
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void PMRotateControlPoint::snapToGrid( )
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{
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int i;
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double d = rotateGrid( );
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if( !approxZero( d ) )
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for( i = 0; i < 3; i++ )
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m_rotation[i] = rint( m_rotation[i] / d ) * d;
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setChanged( );
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}
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