Android Open Source - libgdx-demo-pax-britannica Frigate A I

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Back to project page libgdx-demo-pax-britannica.

License

The source code is released under:

Copyright (c) 2010 Ben Abraham, Renaud B?dard, Henk Boom, Daniel Burton, Matthew Gallant Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated ...

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Java Source Code

package de.swagner.paxbritannica.frigate;
// ww w.  ja  va  2 s.  c  o m
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;

import de.swagner.paxbritannica.Ship;
import de.swagner.paxbritannica.Targeting;

public class FrigateAI {
  private Vector2 target_fuzzy_pos = new Vector2();
  private boolean stopping = false;
  
  public Ship target;

  private Frigate frigate;

  public FrigateAI(Frigate frigate) {
    this.frigate = frigate;
  }

  public void retarget() {
    target = Targeting.getNearestOfType(frigate, 0);
    if (target == null) {
      target = Targeting.getNearestOfType(frigate, 1);
    }
    if (target == null) {
      target = Targeting.getNearestOfType(frigate, 2);
    }
    if (target == null) {
      target = Targeting.getNearestOfType(frigate, 3);
    }  
    
    if (target != null) {
      Vector2 random = new Vector2(MathUtils.cos((float) ((MathUtils.random() * MathUtils.PI * 2) * Math.sqrt(MathUtils.random()))),
                    MathUtils.sin((float) ((MathUtils.random() * MathUtils.PI * 2) * Math.sqrt(MathUtils.random()))));
      target_fuzzy_pos.set(target.collisionCenter).add(random.scl(250));
    }
  }

  public void update() {
    if (target == null || !target.alive || MathUtils.random() < 0.001f) {
      retarget();
    }

    if (target != null) {
      float target_distance = target.collisionCenter.dst(frigate.collisionCenter);
      float speed_square = frigate.velocity.dot(frigate.velocity);

      if (frigate.isReadyToShoot() && speed_square > 0) {
          stopping = true;
      } else if(frigate.isEmpty()) {
          stopping = false;
      }

        if(!stopping) {
          if(target_distance < 150) {
            //not too close!
            frigate.goAway(target_fuzzy_pos, true);
          } else {
            frigate.goTowards(target_fuzzy_pos, true);
          }
        }
        
        // Shoot when not moving and able to fire
        if(!frigate.isEmpty() && speed_square < 0.1) {
            frigate.shoot();
        }
      
    }
  }
}

Java Source Code List