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diff --git a/kpovmodeler/pmline.h b/kpovmodeler/pmline.h
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+++ b/kpovmodeler/pmline.h
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+//-*-C++-*-
+/*
+**************************************************************************
+                                 description
+                             --------------------
+    copyright            : (C) 2000-2001 by Andreas Zehender
+    email                : [email protected]
+**************************************************************************
+
+**************************************************************************
+*                                                                        *
+*  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.                                   *
+*                                                                        *
+**************************************************************************/
+
+
+#ifndef PMLINES_H
+#define PMLINES_H
+
+#include <qptrlist.h>
+#include <GL/gl.h>
+#include "pmdebug.h"
+
+/**
+ * Line to display with index of start and end point.
+ *
+ * Line of a @ref PMViewStructure. Only the indices in a @ref PMPointArray
+ * are stored.
+ *
+ * Optimized for OpenGL
+ */
+class PMLine
+{
+public:
+   /**
+    * Default constructor
+    */
+   PMLine( )
+   {
+      m_start = 0;
+      m_end = 0;
+   }
+   /**
+    * Creates a line with start point si and end point ei. If si is greater
+    * than ei, si and ei are swapped.
+    */
+   PMLine( const GLuint si, const GLuint ei )
+   { m_start = si; m_end = ei; checkPoints( ); }
+
+   /**
+    * Sets the start point.
+    */
+   void setStartPoint( GLuint si ) { m_start = si; checkPoints( ); }
+   /**
+    * Sets the end point.
+    */
+   void setEndPoint( GLuint ei ) { m_end = ei; checkPoints( ); }
+   /**
+    * Returns the start point.
+    */
+   GLuint startPoint( ) const { return m_start; }
+   /**
+    * Returns the end point.
+    */
+   GLuint endPoint( ) const { return m_end; }
+
+private:
+   /**
+    * Swaps the two points.
+    */
+   void swapPoints( ) { GLuint help = m_start; m_start = m_end; m_end = help; }
+   /**
+    * Checks, if si < ei and swaps the two points if necessary
+    */
+   void checkPoints( )
+   {
+      if( m_start == m_end ) kdError( PMArea ) << "Start index = end index in PMLine" << "\n";
+      if( m_start > m_end ) swapPoints( );
+   }
+   /**
+    * The start and end points (indices!)
+    *
+    * THESE MEMBERS HAVE TO BE THE ONLY ONE (for rendering with OpenGl)
+    */
+   GLuint m_start, m_end;
+};
+
+typedef QPtrListIterator<PMLine> PMLineListIterator;
+
+/**
+ * A list of @ref PMLine objects.
+ *
+ * This class stores all lines of a @ref PMViewStructure. A line is
+ * described by a start and end point. Only the indices in a @ref PMPointArray
+ * are stored.
+ */
+typedef QMemArray<PMLine> PMLineArray;
+
+#endif