Enemy AI

Introduction

This page is creating for EnemyAI. EnemyAI sets the movement and attack mode of the enemy, for example, the enemy can attack other units remotely within a certain distance

• updown and leftright tasks
• change the entity speed
• Ranged Attack Task

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Usage

1. Creating updown and leftright tasks, These tasks can move the entity horizontally or up and down.

public void update() {
        float position_x = this.owner.getEntity().getPosition().x;
        if (isMove) {
            if(position_x <= p_x + x/2) {
                this.owner.getEntity().getComponent(PhysicsComponent.class).getBody().setLinearVelocity(new Vector2(1,0));
            } else {
                isMove = false;
            }
        } else {
            if(position_x >= p_x - x/2) {
                this.owner.getEntity().getComponent(PhysicsComponent.class).getBody().setLinearVelocity(new Vector2(-1,0));
            } else {
                isMove = true;
            }
        }
    }

2. Change the movement speed of the entity by adding a method to the PhysicsMovementComponent.java file.

public PhysicsMovementComponent(Vector2 speed) {
    maxSpeed = speed;
  }

3. Creating rangedAttack task, this task can control the attack interval, distance, and target of the entity.

This function controls the attack interval.

public void update() {
        if (timeSource.getTime() >= endtime) {
            this.owner.getEntity().getEvents().trigger("attack");
            endtime = timeSource.getTime() + (int)(waitTime * 1000);
        }
    }

This function controls the distance of the entity.

private float DistanceToTarget() {
        return owner.getEntity().getPosition().dst(target.getPosition());
    }