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/*
Minetest-c55
Copyright (C) 2010-2012 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2012 sapier sapier at gmx dot net
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.
*/
#include "clientlinkableobject.h"
ClientLinkableObject::ClientLinkableObject() {
this->m_Parent = NULL;
}
ClientLinkableObject::~ClientLinkableObject() {
if (this->isLinked())
this->unlink(this);
}
void ClientLinkableObject::link(ClientLinkableObject* entity) {
//TODO check if entity is already linkt (shouldn't be the case but just to be sure)
this->m_LinkedObjects.push_back(entity);
}
void ClientLinkableObject::unlink(ClientLinkableObject* entity) {
this->m_LinkedObjects.remove(entity);
}
void ClientLinkableObject::stepLinkedObjects(v3f pos,float dtime) {
for(std::list<ClientLinkableObject*>::iterator i = this->m_LinkedObjects.begin();
i != this->m_LinkedObjects.end(); i++) {
(*i)->setPosition(pos,dtime);
}
}
bool ClientLinkableObject::handleLinkUnlinkMessages(u8 cmd,std::istringstream* is,ClientEnvironment *m_env) {
if(cmd == AO_Message_type::Link) // Link entity
{
//Object to link entity to
u16 object_id = readU16(*is);
//offset against linked object
v3f offset = readV3F1000(*is);
ClientActiveObject* parent_cao = m_env->getActiveObject(object_id);
ClientLinkableObject* parent = dynamic_cast<ClientLinkableObject*>(parent_cao);
if (parent != NULL) {
this->linkEntity(offset,parent);
}
else {
errorstream << "Invalid object to link to!" << std::endl;
}
return true;
}
else if(cmd == AO_Message_type::UnLink) // UnLink entity
{
if (this->m_Parent == NULL) {
errorstream << "Unlinking object not linked!" << std::endl;
}
this->unlinkEntity();
return true;
}
return false;
}
bool ClientLinkableObject::linkEntity(v3f offset, ClientLinkableObject* parent) {
//already linked unlink first
if (this->m_Parent != NULL) {
return false;
}
//TODO add linkchain support
if (this->m_LinkedObjects.size() > 0) {
return false;
}
parent->link(this);
updateLinkState(true);
this->m_linkOffset = offset;
this->m_Parent = parent;
return true;
}
bool ClientLinkableObject::unlinkEntity() {
if (this->m_Parent != NULL) {
updateLinkState(false);
this->m_Parent->unlink(this);
this->m_Parent = NULL;
return true;
}
return false;
}
bool ClientLinkableObject::isLinked() {
if (this->m_Parent != NULL)
return true;
else
return false;
}
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