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//-*-C++-*-
/*
**************************************************************************
description
--------------------
copyright : (C) 2004 by Leon Pennington
email : leon@leonscape.co.uk
**************************************************************************
**************************************************************************
* *
* 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 PMFACE_H
#define PMFACE_H
#include <qptrlist.h>
#include <qvaluevector.h>
#include <GL/gl.h>
#include "pmdebug.h"
#include "pmvector.h"
/**
* face to display with index of points. Points must be in clockwise order.
*
* Face of a @ref PMViewStructure. Only the indices in a @ref PMPointArray
* are stored.
*
* Optimized for OpenGL
*/
class PMFace
{
public:
/**
* Default constructor
*/
PMFace( )
{
m_points = 0;
m_size = 0;
}
/**
* Copy Constructor
*/
PMFace( const PMFace& face );
/**
* Destructor
*/
~PMFace( ) { delete m_points; }
/**
* Creates a face with three points.
*/
PMFace( const GLuint pt1, const GLuint pt2, const GLuint pt3, const PMVector& normal = PMVector() );
/**
* Creates a face with four points.
*/
PMFace( const GLuint pt1, const GLuint pt2, const GLuint pt3, const GLuint pt4, const PMVector& normal = PMVector() );
/**
* Operator assignment
*/
PMFace& operator=( const PMFace& face );
/**
* Operator equals
*/
bool operator==( const PMFace& face ) const;
/**
* Operator unequals
*/
bool operator!=( const PMFace& face ) const;
/**
* Resizes the number of points in the face.
* @return True if successful
*/
bool resize( const unsigned int size );
/**
* @return The number of points in the face.
*/
unsigned int size( ) const { return m_size; }
/**
* Returns a reference to a point in the face
*/
GLuint& operator[] ( int index );
/**
* Returns a const reference to a point in the face
*/
const GLuint& operator[] ( int index ) const;
/**
* Calculates the normal for the face
*/
void setNormal( const PMVector& normal ) { m_normal = normal; }
/**
* Returns the normal for the face
*/
PMVector normal( ) const { return m_normal; }
private:
/**
* The face points (indices!)
*/
GLuint* m_points;
/**
* The number of points in the face
*/
unsigned int m_size;
/**
* The normal of the face, calculated automatically
*/
PMVector m_normal;
static GLuint s_dummy;
};
typedef QPtrListIterator<PMFace> PMFaceListIterator;
/**
* A list of @ref PMFace objects.
*
* This class stores all faces of a @ref PMViewStructure. Only the indices
* in a @ref PMPointArray are stored.
*/
typedef QValueVector<PMFace> PMFaceArray;
#endif
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