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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "System/mmgr.h"
#include "AirBaseHandler.h"
#include "GlobalSynced.h"
#include "Sim/Misc/TeamHandler.h"
#include "Sim/Units/Unit.h"
#include "Sim/Units/Scripts/CobInstance.h"
#include "Sim/Units/UnitDef.h"
#include "System/creg/STL_List.h"
#include "System/creg/STL_Set.h"
#include <limits>
CAirBaseHandler* airBaseHandler = NULL;
CR_BIND(CAirBaseHandler, )
CR_REG_METADATA(CAirBaseHandler,(
CR_MEMBER(bases),
CR_MEMBER(airBaseIDs),
CR_RESERVED(16)
));
CR_BIND_DERIVED(CAirBaseHandler::LandingPad, CObject, (0, 0, NULL));
CR_REG_METADATA_SUB(CAirBaseHandler, LandingPad, (
CR_MEMBER(unit),
CR_MEMBER(piece),
CR_MEMBER(base),
CR_RESERVED(8)
));
CR_BIND(CAirBaseHandler::AirBase, (NULL))
CR_REG_METADATA_SUB(CAirBaseHandler, AirBase, (
CR_MEMBER(unit),
CR_MEMBER(freePads),
CR_MEMBER(pads),
CR_RESERVED(8)
));
CAirBaseHandler::CAirBaseHandler() : bases(teamHandler->ActiveAllyTeams())
{
}
CAirBaseHandler::~CAirBaseHandler()
{
// should not be any bases left here...
for (int a = 0; a < teamHandler->ActiveAllyTeams(); ++a) {
for (AirBaseLstIt bi = bases[a].begin(); bi != bases[a].end(); ++bi) {
for (PadLstIt pi = (*bi)->pads.begin(); pi != (*bi)->pads.end(); ++pi) {
delete *pi;
}
delete *bi;
}
}
}
void CAirBaseHandler::RegisterAirBase(CUnit* owner)
{
// prevent a unit from being registered as a base more than
// once (this can happen eg. when an airbase unit is damaged
// and then repaired back to full health, which causes it to
// re-register itself via FinishedBuilding())
if (airBaseIDs.find(owner->id) != airBaseIDs.end()) {
return;
}
AirBase* ab = new AirBase(owner);
std::vector<int> args;
owner->script->QueryLandingPads(/*out*/ args);
// FIXME: use a set to avoid multiple bases per piece?
for (unsigned int p = 0; p < args.size(); p++) {
const int piece = args[p];
if (!owner->script->PieceExists(piece)) {
continue;
}
LandingPad* pad = new LandingPad(piece, owner, ab);
ab->pads.push_back(pad);
ab->freePads.push_back(pad);
}
bases[owner->allyteam].push_back(ab);
airBaseIDs.insert(owner->id);
}
void CAirBaseHandler::DeregisterAirBase(CUnit* base)
{
if (airBaseIDs.find(base->id) == airBaseIDs.end()) {
return;
}
for (AirBaseLstIt bi = bases[base->allyteam].begin(); bi != bases[base->allyteam].end(); ++bi) {
if ((*bi)->unit == base) {
for (PadLstIt pi = (*bi)->pads.begin(); pi != (*bi)->pads.end(); ++pi) {
// the unit that has reserved a pad is responsible to see if the pad is gone so just delete it
delete *pi;
}
delete *bi;
bases[base->allyteam].erase(bi);
break;
}
}
airBaseIDs.erase(base->id);
}
void CAirBaseHandler::LeaveLandingPad(LandingPad* pad)
{
pad->GetBase()->freePads.push_back(pad);
}
CAirBaseHandler::LandingPad* CAirBaseHandler::FindAirBase(CUnit* unit, float minPower, bool wantFreePad)
{
float minDist = std::numeric_limits<float>::max();
AirBaseLstIt foundBaseIt = bases[unit->allyteam].end();
for (AirBaseLstIt bi = bases[unit->allyteam].begin(); bi != bases[unit->allyteam].end(); ++bi) {
AirBase* base = *bi;
CUnit* baseUnit = base->unit;
if (unit == baseUnit) {
// do not pick ourselves as a landing pad
continue;
}
if (baseUnit->beingBuilt || baseUnit->stunned) {
continue;
}
if (baseUnit->pos.SqDistance(unit->pos) >= minDist || baseUnit->unitDef->buildSpeed < minPower) {
continue;
}
if (wantFreePad && base->freePads.empty()) {
continue;
}
minDist = baseUnit->pos.SqDistance(unit->pos);
foundBaseIt = bi;
}
if (foundBaseIt != bases[unit->allyteam].end()) {
AirBase* foundBase = *foundBaseIt;
if (wantFreePad) {
LandingPad* foundPad = foundBase->freePads.front();
foundBase->freePads.pop_front();
return foundPad;
} else {
if (!foundBase->pads.empty())
return foundBase->pads.front();
}
}
return NULL;
}
float3 CAirBaseHandler::FindClosestAirBasePos(CUnit* unit, float minPower)
{
const CAirBaseHandler::LandingPad* pad = FindAirBase(unit, minPower, false);
if (pad == NULL)
return ZeroVector;
const AirBase* base = pad->GetBase();
const CUnit* baseUnit = base->unit;
return baseUnit->pos;
}
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