Method getSpawnNode

src/Savegame/SavedBattleGame.cpp:1097–1129

* Finds a fitting node where a unit can spawn. * @param nodeRank Rank of the node (this is not the rank of the alien!). * @param unit Pointer to the unit (to get its position). * @return Pointer to the chosen node. */

 * @return Pointer to the chosen node.
 */
Node *SavedBattleGame::getSpawnNode(int nodeRank, BattleUnit *unit)
{
	int highestPriority = -1;
	std::vector<Node*> compliantNodes;

	for (std::vector<Node*>::iterator i = getNodes()->begin(); i != getNodes()->end(); ++i)
	{
		if ((*i)->getRank() == nodeRank										// ranks must match
			&& (!((*i)->getType() & Node::TYPE_SMALL) 
				|| unit->getArmor()->getSize() == 1)				// the small unit bit is not set or the unit is small
			&& (!((*i)->getType() & Node::TYPE_FLYING) 
				|| unit->getArmor()->getMovementType() == MT_FLY)// the flying unit bit is not set or the unit can fly
			&& (*i)->getPriority() > 0										// priority 0 is no spawnplace
			&& setUnitPosition(unit, (*i)->getPosition(), true))		// check if not already occupied
		{
			if ((*i)->getPriority() > highestPriority)
			{
				highestPriority = (*i)->getPriority();
				compliantNodes.clear(); // drop the last nodes, as we found a higher priority now
			}
			if ((*i)->getPriority() == highestPriority)
			{
				compliantNodes.push_back((*i));
			}
		}
	}

	if (compliantNodes.empty()) return 0;

	int n = RNG::generate(0, compliantNodes.size() - 1);

	return compliantNodes[n];
}

/**
 * Finds a fitting node where a unit can patrol to.