TacticalBrainFeature.java

/*
 * Copyright (c) 2003-onwards Shaven Puppy Ltd
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Shaven Puppy' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package worm.brains;

import java.util.ArrayList;

import worm.Entity;
import worm.Worm;
import worm.entities.Building;
import worm.entities.Factory;
import worm.entities.Turret;
import worm.weapons.WeaponFeature.WeaponInstance;

/**
 * The Tactical Brain tries to destroy turrets, then reactors, then the nearest building
 * @author Cas
 */
public class TacticalBrainFeature extends BrainFeature {

	private static final long serialVersionUID = 1L;

	private float baseFactor;
	private float factoryFactor;
	private float turretFactor;
	private float heavyTurretFactor;

	/**
	 * C'tor
	 */
	public TacticalBrainFeature() {
	}

	/**
	 * C'tor
	 * @param name
	 */
	public TacticalBrainFeature(String name) {
		super(name);
	}

	@Override
	public Entity findTarget(Entity entity) {
		ArrayList<Building> buildings = Worm.getGameState().getBuildings();
		int n = buildings.size();
		if (n == 0) {
			// No buildings left!
			return null;
		}
		Building closest = null;
		float closestDist = Float.MAX_VALUE;
		float mapY = entity.getY();
		float mapX = entity.getX();
		for (int i = 0; i < n; i ++) {
			Building newTarget = buildings.get(i);
			if (newTarget.isActive() && !newTarget.isCloaked() && newTarget.isAttackableByGidrahs()) {
				float factor;
				if (newTarget.isApparentlyValuable()) {
					factor = baseFactor;
				} else if (newTarget instanceof Factory) {
					if (((Factory) newTarget).isShutdown()) {
						continue;
					} else {
						factor = factoryFactor;
					}
				} else if (newTarget instanceof Turret) {
					WeaponInstance weapon = ((Turret) newTarget).getWeapon();
					if (weapon != null && weapon.getFeature().isHeavyWeapon()) {
						factor = heavyTurretFactor;
					} else {
						factor = turretFactor;
					}
				} else {
					continue;
				}

				float dist = newTarget.getDistanceTo(mapX, mapY) * factor;
				if (dist < closestDist) {
					closestDist = dist;
					closest = newTarget;
				}
			}
		}

		if (closest != null) {
			// We found a turret, factory, decoy or base
			return closest;
		}

		// Just go for the nearest building
		return SmartBrainFeature.getInstance().findTarget(entity);
	}
}