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