1 files changed, 93 insertions, 0 deletions
diff --git a/kpovmodeler/pmplanenormalcontrolpoint.cpp b/kpovmodeler/pmplanenormalcontrolpoint.cpp
new file mode 100644
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+++ b/kpovmodeler/pmplanenormalcontrolpoint.cpp
@@ -0,0 +1,93 @@
+/*
+**************************************************************************
+                                 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 QString& 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( );
+}