SG_ParentRelation.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 * 
 */

#ifndef __SG_ParentRelation_h
#define __SG_ParentRelation_h

class SG_Spatial;

class SG_ParentRelation {

public :
    virtual
        bool
    UpdateChildCoordinates(
        SG_Spatial * child,
        const SG_Spatial * parent,
        bool& parentUpdated
    ) = 0;

    virtual 
    ~SG_ParentRelation(
    ){
    };

    virtual 
        SG_ParentRelation *
    NewCopy(
    ) = 0;

    virtual
        bool
    IsVertexRelation(
    ) { 
        return false;
    }
    
    virtual
        bool
    IsSlowRelation(
    ) { 
        return false;
    }
protected :

    SG_ParentRelation(
    ) { 
    };

    SG_ParentRelation(
        const SG_ParentRelation &
    ); 
    
    
#ifdef WITH_CXX_GUARDEDALLOC
public:
    void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:SG_ParentRelation"); }
    void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
};  

#endif