Robocode Tank AI 实例
最近公司流行玩Robocode，这是一个坦克机器人战斗仿真引擎，里面可以写一些自己的Tank来互相战斗。
主要是使用了躲避子弹和避墙的思想
package azrael;import robocode.*;//import java.awt.Color;// API help : http://robocode.sourceforge.net/docs/robocode/robocode/Robot.html/** * Aldis - a robot by (your name here) */public class Aldis extends AdvancedRobot { double previousEnergy = 100; int movementDirection = 1; int gunDirection = 1; int direction = 1; /** * run: Aldis's default behavior */ public void run() { while (true) { setTurnRightRadiansOptimal(adjustHeadingForWalls(0)); setAhead(100); execute(); } } private static final double DOUBLE_PI = (Math.PI * 2); private static final double HALF_PI = (Math.PI / 2); private static final double WALL_AVOID_INTERVAL = 10; private static final double WALL_AVOID_FACTORS = 20; private static final double WALL_AVOID_DISTANCE = (WALL_AVOID_INTERVAL * WALL_AVOID_FACTORS); public double calculateBearingToXYRadians(double sourceX, double sourceY, double sourceHeading, double targetX, double targetY) { return normalizeRelativeAngleRadians( Math.atan2((targetX - sourceX), (targetY - sourceY)) - sourceHeading); } public double normalizeAbsoluteAngleRadians(double angle) { if (angle < 0) { return (DOUBLE_PI + (angle % DOUBLE_PI)); } else { return (angle % DOUBLE_PI); } } public static double normalizeRelativeAngleRadians(double angle) { double trimmedAngle = (angle % DOUBLE_PI); if (trimmedAngle > Math.PI) { return -(Math.PI - (trimmedAngle % Math.PI)); } else if (trimmedAngle < -Math.PI) { return (Math.PI + (trimmedAngle % Math.PI)); } else { return trimmedAngle; } } private double adjustHeadingForWalls(double heading) { double fieldHeight = getBattleFieldHeight(); double fieldWidth = getBattleFieldWidth(); double centerX = (fieldWidth / 2); double centerY = (fieldHeight / 2); double currentHeading = getRelativeHeadingRadians(); double x = getX(); double y = getY(); boolean nearWall = false; double desiredX; double desiredY; // If we are too close to a wall, calculate a course toward // the center of the battlefield. if ((y < WALL_AVOID_DISTANCE) || ((fieldHeight - y) < WALL_AVOID_DISTANCE)) { desiredY = centerY; nearWall = true; } else { desiredY = y; } if ((x < WALL_AVOID_DISTANCE) || ((fieldWidth - x) < WALL_AVOID_DISTANCE)) { desiredX = centerX; nearWall = true; } else { desiredX = x; } // Determine the safe heading and factor it in with the desired // heading if the bot is near a wall if (nearWall) { double desiredBearing = calculateBearingToXYRadians(x, y, currentHeading, desiredX, desiredY); double distanceToWall = Math.min(Math.min(x, (fieldWidth - x)), Math.min(y, (fieldHeight - y))); int wallFactor = (int) Math.min( (distanceToWall / WALL_AVOID_INTERVAL), WALL_AVOID_FACTORS); return ((((WALL_AVOID_FACTORS - wallFactor) * desiredBearing) + (wallFactor * heading)) / WALL_AVOID_FACTORS); } else { return heading; } } public double getRelativeHeadingRadians() { double relativeHeading = getHeadingRadians(); if (direction < 1) { relativeHeading = normalizeAbsoluteAngleRadians(relativeHeading + Math.PI); } return relativeHeading; } public void reverseDirection() { double distance = (getDistanceRemaining() * direction); direction *= -1; setAhead(distance); } public void setAhead(double distance) { double relativeDistance = (distance * direction); super.setAhead(relativeDistance); if (distance < 0) { direction *= -1; } } public void setBack(double distance) { double relativeDistance = (distance * direction); super.setBack(relativeDistance); if (distance > 0) { direction *= -1; } } public void setTurnLeftRadiansOptimal(double angle) { double turn = normalizeRelativeAngleRadians(angle); if (Math.abs(turn) > HALF_PI) { reverseDirection(); if (turn < 0) { turn = (HALF_PI + (turn % HALF_PI)); } else if (turn > 0) { turn = -(HALF_PI - (turn % HALF_PI)); } } setTurnLeftRadians(turn); } public void setTurnRightRadiansOptimal(double angle) { double turn = normalizeRelativeAngleRadians(angle); if (Math.abs(turn) > HALF_PI) { reverseDirection(); if (turn < 0) { turn = (HALF_PI + (turn % HALF_PI)); } else if (turn > 0) { turn = -(HALF_PI - (turn % HALF_PI)); } } setTurnRightRadians(turn); } /** * onScannedRobot: What to do when you see another robot */ public void onScannedRobot(ScannedRobotEvent e) { // Stay at right angles to the opponent fire(2); setTurnRight(e.getBearing() + 90 - 30 * movementDirection); // If the bot has small energy drop, // assume it fired double changeInEnergy = previousEnergy - e.getEnergy(); if (changeInEnergy > 0 && changeInEnergy <= 3) { // Dodge! movementDirection = -movementDirection; setAhead((e.getDistance() / 4 + 25) * movementDirection); } // When a bot is spotted, // sweep the gun and radar gunDirection = -gunDirection; setTurnGunRight(99999 * gunDirection); // Fire directly at target // fire( 2 ) ; // Track the energy level previousEnergy = e.getEnergy(); }}