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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "Group.h"
#include "GroupHandler.h"
#include "Game/GlobalUnsynced.h"
#include "Sim/Units/UnitHandler.h"
#include "System/EventHandler.h"
#include "System/creg/STL_Set.h"
#include "System/float3.h"
CR_BIND(CGroup, (0, NULL))
CR_REG_METADATA(CGroup, (
CR_MEMBER(id),
CR_MEMBER(units),
CR_MEMBER(handler),
CR_POSTLOAD(PostLoad)
))
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CGroup::CGroup(int id, CGroupHandler* groupHandler)
: id(id)
, handler(groupHandler)
{
}
CGroup::~CGroup()
{
// should not have any units left, but just to be sure
ClearUnits();
}
void CGroup::PostLoad()
{
assert(unitHandler != nullptr);
auto unitBackup = units;
for (const int unitID: unitBackup) {
CUnit* unit = unitHandler->GetUnit(unitID);
units.erase(unit->id);
unit->group = nullptr;
}
}
bool CGroup::AddUnit(CUnit* unit)
{
units.insert(unit->id);
handler->PushGroupChange(id);
return true;
}
void CGroup::RemoveUnit(CUnit* unit)
{
units.erase(unit->id);
handler->PushGroupChange(id);
}
void CGroup::RemoveIfEmptySpecialGroup()
{
if (units.empty()
&& (id >= CGroupHandler::FIRST_SPECIAL_GROUP)
/*&& (handler == grouphandler)*/
&& (handler->team == gu->myTeam)) // HACK so Global AI groups do not get erased DEPRECATED
{
handler->RemoveGroup(this);
}
}
void CGroup::Update()
{
RemoveIfEmptySpecialGroup();
}
void CGroup::ClearUnits()
{
while (!units.empty()) {
CUnit* unit = unitHandler->GetUnit(*units.begin());
unit->SetGroup(0);
}
handler->PushGroupChange(id);
}
float3 CGroup::CalculateCenter() const
{
float3 center = ZeroVector;
if (!units.empty()) {
for (const int unitID: units) {
center += (unitHandler->GetUnit(unitID))->pos;
}
center /= units.size();
}
return center;
}
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