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