1 files changed, 78 insertions, 0 deletions
diff --git a/kpovmodeler/pmrotatecontrolpoint.cpp b/kpovmodeler/pmrotatecontrolpoint.cpp
new file mode 100644
index 00000000..b612b4c9
--- /dev/null
+++ b/kpovmodeler/pmrotatecontrolpoint.cpp
@@ -0,0 +1,78 @@
+/*
+**************************************************************************
+                                 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( );
+}