4jcraft/Minecraft.World/AI/Goals/TargetGoal.h

#pragma once

#include "Goal.h"

class PathfinderMob;

class TargetGoal : public Goal {
public:
    static const int TargetFlag = 1;

private:
    static const int EmptyReachCache = 0;
    static const int CanReachCache = 1;
    static const int CantReachCache = 2;
    static const int UnseenMemoryTicks = 60;

protected:
    PathfinderMob* mob;  // Owner of this goal
    bool mustSee;

private:
    bool mustReach;
    int reachCache;
    int reachCacheTime;
    int unseenTicks;

    void _init(PathfinderMob* mob, bool mustSee, bool mustReach);

public:
    TargetGoal(PathfinderMob* mob, bool mustSee);
    TargetGoal(PathfinderMob* mob, bool mustSee, bool mustReach);
    virtual ~TargetGoal() {}

    virtual bool canContinueToUse();

protected:
    virtual double getFollowDistance();

public:
    virtual void start();
    virtual void stop();

protected:
    virtual bool canAttack(std::shared_ptr<LivingEntity> target,
                           bool allowInvulnerable);

private:
    bool canReach(std::shared_ptr<LivingEntity> target);
};