cullsys.cpp

Go to the documentation of this file.

/*
**  Command & Conquer Generals Zero Hour(tm)
**  Copyright 2025 Electronic Arts Inc.
**
**  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 3 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, see <http://www.gnu.org/licenses/>.
*/
 
/***********************************************************************************************
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : WWMath                                                       *
 *                                                                                             *
 *                     $Archive:: /VSS_Sync/wwmath/cullsys.cpp                                $*
 *                                                                                             *
 *                       Author:: Greg Hjelstrom                                               *
 *                                                                                             *
 *                     $Modtime:: 10/16/00 11:42a                                             $*
 *                                                                                             *
 *                    $Revision:: 5                                                           $*
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 
#include "cullsys.h"
#include "wwdebug.h"
#include "wwprofile.h"
 
 
/*************************************************************************
**
** CullableClass Implementation
**
*************************************************************************/
CullableClass::CullableClass(void) :
    CullLink(NULL),
    NextCollected(NULL)
{
    CullBox.Init(Vector3(0,0,0),Vector3(1,1,1));
}
 
CullableClass::~CullableClass(void)
{
    // the cull system that contains us is responsible for any culling link
    // so we better be out of it and it should have cleared our pointer before
    // we are deleted.
    WWASSERT(CullLink == NULL);
}
 
void CullableClass::Set_Cull_Box(const AABoxClass & box,bool just_loaded)
{
    CullBox = box;
    
    WWPROFILE("Cullable::Set_Cull_Box");
 
    // Just_loaded flag allows us to update the box without notifying the
    // culling system.  Use this when you've saved and loaded the linkage 
    // so you know you're in the right node of the culling system...
    if (!just_loaded) {
        CullSystemClass * sys = Get_Culling_System();
        if (sys != NULL) {
            sys->Update_Culling(this);
        }
    }
}
 
void CullableClass::Set_Culling_System(CullSystemClass * sys)
{
    if (CullLink) {
        CullLink->Set_Culling_System(sys);
    }
}
 
CullSystemClass * CullableClass::Get_Culling_System(void) const
{
    if (CullLink) {
        return CullLink->Get_Culling_System();
    }
    return NULL;
}
 
 
/*************************************************************************
**
** CullSystemClass Implementation
** 
** The base CullSystemClass mainly contains code for maintaining the
** current collection list and iterating through it.
**
*************************************************************************/
CullSystemClass::CullSystemClass(void) :
    CollectionHead(NULL)
{
}
 
CullSystemClass::~CullSystemClass(void)
{
}
 
// NOTE: THE Get_() functions currently are the same as the Peek_() functions (e.g., they do not
// add a Ref). This is wrong and will be fixed.
CullableClass * CullSystemClass::Get_First_Collected_Object_Internal(void)
{
    return CollectionHead;
}
 
CullableClass * CullSystemClass::Get_Next_Collected_Object_Internal(CullableClass * obj)
{
    if (obj != NULL) {
        return obj->NextCollected;
    }
    return NULL;
}
 
CullableClass * CullSystemClass::Peek_First_Collected_Object_Internal(void)
{
    return CollectionHead;
}
 
CullableClass * CullSystemClass::Peek_Next_Collected_Object_Internal(CullableClass * obj)
{
    if (obj != NULL) {
        return obj->NextCollected;
    }
    return NULL;
}
 
void CullSystemClass::Reset_Collection(void)
{
    CollectionHead = NULL;
}
 
void CullSystemClass::Add_To_Collection(CullableClass * obj)
{
    WWASSERT(obj != NULL);
    obj->NextCollected = CollectionHead;
    CollectionHead = obj;
}