oasismass.h

使用stl技术,(还没看,是听说的)

/******************************************************************************
 * This source file is part of Bad Camel Gaming
 * Copyright (C) 2003  Zephie Greyvenstein
 * See Readme.html for acknowledgements
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *****************************************************************************/

/******************************************************************************
 * FILENAME    : oasisMass.h
 * DESCRIPTION : A mass object
 * AUTHOR      : Zephie Greyvenstein
 *****************************************************************************/

/// Avoid double inclusion
#ifndef __MASS_H__
#define __MASS_H__

/// Include common stuff
#include "oasisCommon.h"
/// Include the rest of the needed oasis stuff
#include "oasisVector3.h"

/// Forward declare ODE stuff
struct dMass;
class dBody;

namespace Oasis {
  /// This is a mass object that is used to control the weight of physics
  class _oasisExport mass {
    /// Physics needs to control this object
    friend class physics;
  public:
    /// Mass types
    enum MassType {
      /// Box mass
      MT_BOX        = 0,
      /// Sphere mass
      MT_SPHERE     = 1,
      /// Capped cylinder mass
      MT_CCYLINDER  = 2,
      /// Cylinder mass
      MT_CYLINDER   = 3
    };

    /// Constructor
    mass( );    
    /// Destructor
    virtual ~mass( );

    /// Set the mass as a box
    void setBox( real newDensity, 
		 real newLength,
		 real newHeight,
		 real newDepth );
    /// Set the mass as a sphere
    void setSphere( real newDensity, real newRadius );
    /// Set the mass as a capped cylinder
    void setCCylinder( real newDensity, real newRadius, real newLength );
    /// Set the mass as a cylinder
    void setCylinder( real newDensity, real newRadius, real newLength );
    
    /// Get the type of mass this is using
    const MassType getType( void ) const;

    /// Get the density of this mass
    const real getDensity( void ) const;
    /// Get the length of the mass ( meaningless for sphere )
    const real getLength( void ) const;
    /// Get the height of the mass ( meaningless for sphere and cylinders )
    const real getHeight( void ) const;
    /// Get the depth of the mass ( meaningless for sphere and cylinders )
    const real getDepth( void ) const;
    /// Get the radius of the mass ( meaningless for box )
    const real getRadius( void ) const;

    /// Copy parameters of another mass
    void copyParameters( const mass *otherMass );
    
  protected:      
    /// The mass object
    dMass *odeMass;   
    /// The body parent
    dBody *parent;
    /// This type of mass
    MassType type;
    /// Density of the mass
    real density;   
    /// The length of the mass
    real length;
    /// The height of the mass
    real height;
    /// The depth of the mass
    real depth;
    /// The radius of the mass
    real radius;
   
    /// Set the ODE body this mass needs to update to
    void setODEBodyParent( dBody *parent );

    /// Reassigns the mass to it's body parent when a change is made
    void _reAssignToParent( void );
  };    
};

#endif