RangedManager.cpp

#include "RangedManager.h"
#include "Util.h"
#include "YoAgent.h"

RangedManager::RangedManager(YoAgent & bot)
	: MicroManager(bot)
{

}

void RangedManager::executeMicro(const std::vector<const sc2::Unit *> & targets)
{
	assignTargets(targets);
}

void RangedManager::assignTargets(const std::vector<const sc2::Unit *> & targets)
{
	const std::vector<const sc2::Unit *> & rangedUnits = getUnits();

	// figure out targets
	std::vector<const sc2::Unit *> rangedUnitTargets;
	for (auto target : targets)
	{
		if (!target) { continue; }
		if (target->unit_type == sc2::UNIT_TYPEID::ZERG_EGG) { continue; }
		if (target->unit_type == sc2::UNIT_TYPEID::ZERG_LARVA) { continue; }

		rangedUnitTargets.push_back(target);
	}

	// for each meleeUnit
	for (auto rangedUnit : rangedUnits)
	{
		//BOT_ASSERT(rangedUnit, "ranged unit is null");

		// if the order is to attack or defend
		if (order.getType() == SquadOrderTypes::Attack || order.getType() == SquadOrderTypes::Defend)
		{
			if (!rangedUnitTargets.empty())
			{
				// find the best target for this meleeUnit
				const sc2::Unit * target = getTarget(rangedUnit, rangedUnitTargets);

				// attack it
				//if (m_bot.Config().KiteWithRangedUnits)
				//Only Kite if we've lost shields completely
				if (rangedUnit->health < rangedUnit->health_max && rangedUnit->shield < 5) Micro::SmartKiteTarget(rangedUnit, target, m_bot);
				else Micro::SmartAttackUnit(rangedUnit, target, m_bot);
			}
			// if there are no targets
			else
			{
				// if we're not near the order position
				if (Util::Dist(rangedUnit->pos, order.getPosition()) > 4)
				{
					// move to it
					Micro::SmartMove(rangedUnit, order.getPosition(), m_bot);
				}
			}
		}

		//if (m_bot.Config().DrawUnitTargetInfo) { // TODO: draw the line to the unit's target }
	}
}

// get a target for the ranged unit to attack
// TODO: this is the melee targeting code, replace it with something better for ranged units
const sc2::Unit * RangedManager::getTarget(const sc2::Unit * rangedUnit, const std::vector<const sc2::Unit *> & targets)
{
	//BOT_ASSERT(rangedUnit, "null melee unit in getTarget");

	int highPriority = 0;
	double closestDist = std::numeric_limits<double>::max();
	const sc2::Unit * closestTarget = nullptr;

	// for each target possiblity
	for (auto targetUnit : targets)
	{
		//BOT_ASSERT(targetUnit, "null target unit in getTarget");

		int priority = getAttackPriority(rangedUnit, targetUnit);
		float distance = Util::Dist(rangedUnit->pos, targetUnit->pos);

		// if it's a higher priority, or it's closer, set it
		if (!closestTarget || (priority > highPriority) || (priority == highPriority && distance < closestDist))
		{
			closestDist = distance;
			highPriority = priority;
			closestTarget = targetUnit;
		}
	}

	return closestTarget;
}

// get the attack priority of a type in relation to a zergling
int RangedManager::getAttackPriority(const sc2::Unit * attacker, const sc2::Unit * unit)
{
	//BOT_ASSERT(unit, "null unit in getAttackPriority");

	if (Util::IsCombatUnit(unit, m_bot))
	{
		return 10;
	}

	if (Util::IsWorker(unit))
	{
		return 9;
	}

	return 1;
}