forked from bartvdbraak/blender
9ed079bf5c
Certain actuators hold a pointer to an objects: Property, SceneCamera, AddObject, Camera, Parent, TractTo. When a group is duplicated, the actuators that point to objects within the group will be relinked to point to the replicated objects and not to the original objects. This helps to setup self-contained group with a camera following a character for example. This feature also works when adding a single object (and all its children) with the AddObject actuator. The second part of the patch extends the protection against object deletion to all the actuators of the above list (previously, only the TrackTo, AddObject and Property actuators were protected). In case the target object of these actuators is deleted, the BGE won't crash.
220 lines
5.5 KiB
C++
220 lines
5.5 KiB
C++
/**
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* Set or remove an objects parent
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*
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* $Id: SCA_ParentActuator.cpp 13932 2008-03-01 19:05:41Z ben2610 $
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version. The Blender
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* Foundation also sells licenses for use in proprietary software under
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* the Blender License. See http://www.blender.org/BL/ for information
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* about this.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#include "KX_ParentActuator.h"
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#include "KX_GameObject.h"
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#include "KX_PythonInit.h"
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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/* ------------------------------------------------------------------------- */
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/* Native functions */
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/* ------------------------------------------------------------------------- */
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KX_ParentActuator::KX_ParentActuator(SCA_IObject *gameobj,
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int mode,
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SCA_IObject *ob,
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PyTypeObject* T)
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: SCA_IActuator(gameobj, T),
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m_mode(mode),
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m_ob(ob)
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{
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if (m_ob)
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m_ob->RegisterActuator(this);
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}
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KX_ParentActuator::~KX_ParentActuator()
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{
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if (m_ob)
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m_ob->UnregisterActuator(this);
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}
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CValue* KX_ParentActuator::GetReplica()
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{
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KX_ParentActuator* replica = new KX_ParentActuator(*this);
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// replication just copy the m_base pointer => common random generator
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replica->ProcessReplica();
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CValue::AddDataToReplica(replica);
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return replica;
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}
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void KX_ParentActuator::ProcessReplica()
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{
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if (m_ob)
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m_ob->RegisterActuator(this);
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SCA_IActuator::ProcessReplica();
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}
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bool KX_ParentActuator::UnlinkObject(SCA_IObject* clientobj)
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{
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if (clientobj == m_ob)
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{
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// this object is being deleted, we cannot continue to track it.
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m_ob = NULL;
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return true;
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}
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return false;
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}
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void KX_ParentActuator::Relink(GEN_Map<GEN_HashedPtr, void*> *obj_map)
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{
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void **h_obj = (*obj_map)[m_ob];
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if (h_obj) {
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if (m_ob)
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m_ob->UnregisterActuator(this);
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m_ob = (SCA_IObject*)(*h_obj);
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m_ob->RegisterActuator(this);
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}
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}
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bool KX_ParentActuator::Update()
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{
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bool bNegativeEvent = IsNegativeEvent();
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RemoveAllEvents();
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if (bNegativeEvent)
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return false; // do nothing on negative events
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KX_GameObject *obj = (KX_GameObject*) GetParent();
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KX_Scene *scene = PHY_GetActiveScene();
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switch (m_mode) {
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case KX_PARENT_SET:
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if (m_ob)
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obj->SetParent(scene, (KX_GameObject*)m_ob);
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break;
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case KX_PARENT_REMOVE:
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obj->RemoveParent(scene);
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break;
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};
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return false;
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}
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/* ------------------------------------------------------------------------- */
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/* Python functions */
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/* ------------------------------------------------------------------------- */
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/* Integration hooks ------------------------------------------------------- */
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PyTypeObject KX_ParentActuator::Type = {
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PyObject_HEAD_INIT(&PyType_Type)
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0,
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"KX_ParentActuator",
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sizeof(KX_ParentActuator),
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0,
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PyDestructor,
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0,
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__getattr,
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__setattr,
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0, //&MyPyCompare,
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__repr,
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0, //&cvalue_as_number,
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0,
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0,
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0,
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0
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};
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PyParentObject KX_ParentActuator::Parents[] = {
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&KX_ParentActuator::Type,
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&SCA_IActuator::Type,
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&SCA_ILogicBrick::Type,
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&CValue::Type,
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NULL
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};
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PyMethodDef KX_ParentActuator::Methods[] = {
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{"setObject", (PyCFunction) KX_ParentActuator::sPySetObject, METH_VARARGS, SetObject_doc},
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{"getObject", (PyCFunction) KX_ParentActuator::sPyGetObject, METH_VARARGS, GetObject_doc},
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{NULL,NULL} //Sentinel
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};
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PyObject* KX_ParentActuator::_getattr(const STR_String& attr) {
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_getattr_up(SCA_IActuator);
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}
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/* 1. setObject */
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char KX_ParentActuator::SetObject_doc[] =
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"setObject(object)\n"
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"\tSet the object to set as parent.\n"
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"\tCan be an object name or an object\n";
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PyObject* KX_ParentActuator::PySetObject(PyObject* self, PyObject* args, PyObject* kwds) {
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PyObject* gameobj;
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if (PyArg_ParseTuple(args, "O!", &KX_GameObject::Type, &gameobj))
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{
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if (m_ob != NULL)
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m_ob->UnregisterActuator(this);
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m_ob = (SCA_IObject*)gameobj;
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if (m_ob)
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m_ob->RegisterActuator(this);
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Py_Return;
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}
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PyErr_Clear();
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char* objectname;
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if (PyArg_ParseTuple(args, "s", &objectname))
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{
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SCA_IObject *object = (SCA_IObject*)SCA_ILogicBrick::m_sCurrentLogicManager->GetGameObjectByName(STR_String(objectname));
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if(object)
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{
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if (m_ob != NULL)
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m_ob->UnregisterActuator(this);
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m_ob = object;
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m_ob->RegisterActuator(this);
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Py_Return;
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}
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}
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return NULL;
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}
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/* 2. getObject */
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char KX_ParentActuator::GetObject_doc[] =
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"getObject()\n"
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"\tReturns the object that is set to.\n";
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PyObject* KX_ParentActuator::PyGetObject(PyObject* self, PyObject* args, PyObject* kwds) {
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return PyString_FromString(m_ob->GetName());
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}
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/* eof */
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