📄 smarttank.java
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//------------------------------------------------------------------------------
// COPYRIGHT 2008 GUIDEBEE
// ALL RIGHTS RESERVED.
// GUIDEBEE CONFIDENTIAL PROPRIETARY
///////////////////////////////////// REVISIONS ////////////////////////////////
// Date Name Tracking # Description
// --------- ------------------- ---------- --------------------------
// 18JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////////
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in all
//copies or substantial portions of the Software.
//
//The Software shall be used for Good, not Evil.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//SOFTWARE.
//Any questions, feel free to drop me a mail at james.shen@guidebee.biz.
//--------------------------------- PACKAGE ------------------------------------
package com.pstreets.game.battlecity;
//--------------------------------- IMPORTS ------------------------------------
//[------------------------------ MAIN CLASS ----------------------------------]
////////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ----------------------------------
// Date Name Tracking # Description
// -------- ------------------- ------------- --------------------------
// 18JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////////
/**
* Smart tank.
* <p>
* <hr><b>© Copyright 2008 Guidebee, Inc. All Rights Reserved.</b>
* @version 1.00, 18/01/08
* @author Guidebee, Inc.
*/
public final class SmartTank extends EnemyTank{
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 18JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Constructor.
* @param hasPrize if true, when player hit the tank, a new powerup is put
* in the battle field.
*/
protected SmartTank(boolean hasPrize) {
super(hasPrize);
direction=BattleField.SOUTH;
speed=ResourceManager.TILE_WIDTH/2;
score=Score.SCORE_300;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 18JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Look for the player tank,if in the same row or col return true.
* @param dir current direction.
*/
private boolean lookforPlayer(int dir){
PlayerTank playerTank=(PlayerTank)TANK_POOL[0];
int playerX = playerTank.getRefPixelX();
int playerY = playerTank.getRefPixelY();
int dx=0;int dy=0;
if(dir == BattleField.NORTH){
dy = -speed;
} else if(dir == BattleField.SOUTH){
dy = speed;
} else if(dir == BattleField.EAST){
dx = speed;
} else if(dir == BattleField.WEST){
dx = -speed;
} else{
return false;
}
int myx = this.getRefPixelX();
int myy = this.getRefPixelY();
int width = battleField.getWidth();
int height = battleField.getHeight();
while(myx > 0 && myx < width && myy > 0 && myy < height){
//if(battleField.hitWall(myx,myy,0)){return false;}
if(myx > playerX - speed && myx < playerX + speed && myy > playerY - speed && myy < playerY +speed){
return true;
}
myx+=dx;
myy+=dy;
}
return false;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Tank thinks before move.
*/
public void think(){
PlayerTank playerTank=(PlayerTank)TANK_POOL[0];
int newdir = BattleField.SOUTH;
int minDistance=Integer.MAX_VALUE;
int distance=0;
boolean blockedeast = battleField.containsImpassableArea
(getX() + speed, getY(), getWidth(), getHeight());
boolean blockedsouth = battleField.containsImpassableArea
(getX(),getY() + speed, getWidth(), getHeight());
boolean blockedwest = battleField.containsImpassableArea
(getX()-speed,getY(),getWidth(), getHeight());
boolean blockednorth = battleField.containsImpassableArea
(getX(),getY() - speed, getWidth(), getHeight());
if(direction == BattleField.NORTH){
if(!blockedwest){
distance=(getX()-speed-playerTank.getX())*
(getX()-speed-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.WEST;
minDistance=distance;
}
}
if(!blockedeast){
distance=(getX()+speed-playerTank.getX())*
(getX()+speed-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.EAST;
minDistance=distance;
}
}
if(!blockednorth){
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-speed-playerTank.getY())*
(getY()-speed-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NORTH;
minDistance=distance;
}
}
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NONE;
minDistance=distance;
}
}else if(direction == BattleField.WEST){
if(!blockedwest){
distance=(getX()-speed-playerTank.getX())*
(getX()-speed-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.WEST;
minDistance=distance;
}
}
if(!blockedsouth){
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()+speed-playerTank.getY())*
(getY()+speed-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.SOUTH;
minDistance=distance;
}
}
if(!blockednorth){
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-speed-playerTank.getY())*
(getY()-speed-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NORTH;
minDistance=distance;
}
}
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NONE;
minDistance=distance;
}
}else if(direction == BattleField.SOUTH){
if(!blockedwest){
distance=(getX()-speed-playerTank.getX())*
(getX()-speed-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.WEST;
minDistance=distance;
}
}
if(!blockedsouth){
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()+speed-playerTank.getY())*
(getY()+speed-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.SOUTH;
minDistance=distance;
}
}
if(!blockedeast){
distance=(getX()+speed-playerTank.getX())*
(getX()+speed-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.EAST;
minDistance=distance;
}
}
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NONE;
minDistance=distance;
}
}else if(direction == BattleField.EAST){
if(!blockednorth){
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-speed-playerTank.getY())*
(getY()-speed-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NORTH;
minDistance=distance;
}
}
if(!blockedsouth){
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()+speed-playerTank.getY())*
(getY()+speed-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.SOUTH;
minDistance=distance;
}
}
if(!blockedeast){
distance=(getX()+speed-playerTank.getX())*
(getX()+speed-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.EAST;
minDistance=distance;
}
}
distance=(getX()-playerTank.getX())*
(getX()-playerTank.getX())+
(getY()-playerTank.getY())*
(getY()-playerTank.getY());
if(distance<minDistance){
newdir = BattleField.NONE;
minDistance=distance;
}
}else{
if((Math.abs(rnd.nextInt()) %10) >5){
//every so often, go crazy
newdir = Math.abs(rnd.nextInt()) % 4;
}
}
changeDirection(newdir);
shoot=false;
int shooting=Math.abs(rnd.nextInt()) % 100;
if(shooting>=50 ||lookforPlayer(direction)) {
shoot=true;
}
super.think();
}
}
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