Return to Revisions

I'm not very good at this but I thought I'd still give it a shot, you know, practice and stuff.

My tank will randomly decide to move or shoot. When it decides to shoot, it'll try to shoot at the nearest available target.

package com.richarda.tankwar;

import zove.ppcg.tankwar.*;

import java.util.Random;
import java.util.ArrayList;


public class RichardATank implements Tank
{
    private String name;

    public RichardATank()
    {
        this.name = "Richard-A Tank";
    }

    /**
     *
     * @param field
     *            The current battlefield, complete with all obstacle and tank
     *            positions
     * @param position
     */
    @Override
    public void onSpawn(Battlefield field, MapPoint position)
    {

    }

    /**
     * The tank will randomly move around and occasionally shoot at the nearest available target.
     *
     * @param field
     *            The current battlefield, complete with all obstacle and tank
     *            positions
     * @param position
     *            The tank's current position
     * @param health
     *            The tank's current health
     * @return
     */
    @Override
    public TurnAction onTurn(Battlefield field, MapPoint position, float health)
    {
        Random r = new Random();
        int n = r.nextInt(5);

        TurnAction.Direction direction;
        switch(n)
        {
            case 0:
                direction = TurnAction.Direction.NORTH;
                break;
            case 1:
                direction = TurnAction.Direction.EAST;
                break;
            case 2:
                direction = TurnAction.Direction.SOUTH;
                break;
            case 3:
                direction = TurnAction.Direction.WEST;
                break;
            default:
                return this.tryShootAtNearestTank(field, position);
        }

        return TurnAction.createMoveAction(direction, r.nextInt(2) + 1);
    }

    /**
     *
     * @param newPosition
     *            The tank's new position (may not be changed)
     * @param hit
     *            What the tank hit, if it decided to shoot
     */
    @Override
    public void turnFeedback(MapPoint newPosition, FieldObjectType hit)
    {

    }

    /**
     *
     * @param field
     *            The battlefield
     * @param won
     */
    @Override
    public void onDestroyed(Battlefield field, boolean won)
    {

    }

    @Override
    public String getName()
    {
        return this.name;
    }

    /**
     * Try and shoot at the nearest tank
     *
     * @param bf The battlefield
     * @param curTankLocation The current tank's location
     * @return TurnAction the shoot action to the nearest tank
     */
    private TurnAction tryShootAtNearestTank(Battlefield bf, MapPoint curTankLocation)
    {
        MapPoint nearestTankLoc = this.getNearestTankLocation(bf, curTankLocation);

        double firingAngle = curTankLocation.angleBetween(nearestTankLoc);

        return TurnAction.createShootAction((float) firingAngle);
    }

    /**
     * Try to find the nearest tank's location
     *
     * @param bf The battlefield
     * @param curTankLocation The current tank's location
     * @return MapPoint The location of the nearest tank
     */
    private MapPoint getNearestTankLocation(Battlefield bf, MapPoint curTankLocation)
    {
        ArrayList<MapPoint> enemyTankLocations = this.getEnemyTanksOnField(bf, curTankLocation);

        MapPoint nearestTankLoc = null;

        for(MapPoint enemyTankLoc : enemyTankLocations)
        {
            if(nearestTankLoc == null || curTankLocation.distanceTo(enemyTankLoc) < curTankLocation.distanceTo(nearestTankLoc))
            {
                nearestTankLoc = enemyTankLoc;
            }
        }

        return nearestTankLoc;
    }

    /**
     * Get all enemy tanks on the field
     *
     * @param bf The battlefield
     * @param curTankLocation The current tank's location
     * @return ArrayList<MapPoint> A list with all enemy tanks in it
     */
    private ArrayList<MapPoint> getEnemyTanksOnField(Battlefield bf, MapPoint curTankLocation)
    {
        int maxSize = Battlefield.FIELD_SIZE;
        ArrayList<MapPoint> tanks = new ArrayList<MapPoint>();

        for(int i = 0; i < maxSize; i++)
        {
            for(int j = 0; j < maxSize; j++)
            {
                FieldObjectType objType = bf.getObjectTypeAt(i, j);

                if(objType == FieldObjectType.TANK)
                {
                    MapPoint tankLocation = new MapPoint(i, j);

                    if(!tankLocation.equals(curTankLocation))
                    {
                        tanks.add(tankLocation);
                    }
                }
            }
        }

        return tanks;
    }
}

The full code including the control program can be found here.