📄 battlefield.java
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}
}
return bRet;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Initialize the Enemy's start position.
* @param tank the Enemy's tank.
*/
public void initEnemyTankPos(EnemyTank tank){
nextEnemyPos%=3;
int x=enemyPos[nextEnemyPos][0];
int y=enemyPos[nextEnemyPos][1];
tank.setPosition(x,y);
nextEnemyPos++;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* read battle field from HZK.
* @param gameLevel the current game level.
*/
public void readBattlefieldFromHZK(int gameLevel){
InputStream is=this.getClass().getResourceAsStream("/hzk12");
int []buffer=new int[24];
int []hzData=new int[13*13+4];
int index=0;
try{
is.skip(gameLevel*24);
for(int i=0;i<24;i++) buffer[i]=is.read();
int tempChar;
int tempBit;;
index=0;
for(int i=0;i<12;i++){
for(int j=0;j<2;j++){
tempChar=buffer[i*2+j];
tempBit=0x80;
for(int k=0;k<8;k++){
if(j==1 && k>3) break;
if((tempBit & tempChar)!=0){
hzData[index++]='2';
}else{
hzData[index++]='0';
}
tempBit=tempBit>>1;
}
}
hzData[index++]='0';
hzData[index++]='\n';
}
byte[] byteArray=new byte[hzData.length];
for(int i=0;i<byteArray.length;i++){
byteArray[i]=(byte)hzData[i];
}
ByteArrayInputStream bais=new ByteArrayInputStream(byteArray);
initBattlefield(bais);
}catch(Exception e){
//inglore the exception.
}
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Initialize the player's start position.
* @param tank the player's tank.
*/
public void initPlayerTankPos(PlayerTank tank){
int x=(WIDTH_IN_TILES/4-2)*ResourceManager.TILE_WIDTH;
int y=(HEIGHT_IN_TILES/2-1)*ResourceManager.TILE_WIDTH;
//this place will be placed with player's tank.
duplicateCell(x*2/ResourceManager.TILE_WIDTH,
y*2/ResourceManager.TILE_WIDTH,0);
tank.setPosition(x,y);
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Initialize the powerup's random start position.
* @param powerup the powerup object.
*/
public void initPowerupPos(Powerup powerup){
if(powerup.getType()==Powerup.HOME ||
powerup.getType()==Powerup.HOME_DESTROYED){
int x=(WIDTH_IN_TILES/4)*ResourceManager.TILE_WIDTH;
int y=(HEIGHT_IN_TILES/2-1)*ResourceManager.TILE_WIDTH;
powerup.setPosition(x,y);
}else{
int x0=(WIDTH_IN_TILES/4)*ResourceManager.TILE_WIDTH;
int y0=(HEIGHT_IN_TILES/2-1)*ResourceManager.TILE_WIDTH;
int x=(Math.abs(rnd.nextInt()) % (WIDTH_IN_TILES/2))
*ResourceManager.TILE_WIDTH;
int y=(Math.abs(rnd.nextInt()) % (WIDTH_IN_TILES/2))
*ResourceManager.TILE_WIDTH;
//aovid the home cell.
while(x==x0 && y==y0){
x=(Math.abs(rnd.nextInt()) % (WIDTH_IN_TILES/2))
*ResourceManager.TILE_WIDTH;
y=(Math.abs(rnd.nextInt()) % (WIDTH_IN_TILES/2))
*ResourceManager.TILE_WIDTH;
}
powerup.setPosition(x,y);
}
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Make home wall a concrete wall.
*/
public void makeHomeConcreteWall(){
//Draw the player's home area.
for(int i=0;i<6;i++){
for(int j=0;j<4;j++){
setCell(i+(WIDTH_IN_TILES/2-3), HEIGHT_IN_TILES-4+j, CONCRETE_WALL);
}
}
//this place will be placed with player's flag.
duplicateCell((WIDTH_IN_TILES-2)/2,HEIGHT_IN_TILES-2,0);
concreteWallStartTime=System.currentTimeMillis();
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Read the battle from an input stream.
* @param is input stream stores the battle field information.
*/
public synchronized void initBattlefield(java.io.InputStream is)
throws IOException {
//The actually canvas can be larger than 13X13 . initialiaze the battle
//field with some random value.
Random rnd=new Random();
for(int i=0;i<WIDTH_IN_TILES;i+=2){
for(int j=0;j<HEIGHT_IN_TILES;j+=2){
int value=Math.abs(rnd.nextInt()) % 24;
if(value>17){
if(value==21 || value==22){
duplicateCell(i,j,-1 - ((i ^ j) & 1));
}else{
duplicateCell(i, j, value-17);
}
}else{
duplicateCell(i,j,0);
}
}
}
try{
if(is!=null){
readBattlefield(is);
}
}catch(IOException e){}
makeHomeBrickWall();
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* @InheritDoc
*/
public void tick() {
int tickState = (tickCount++ >> 3); // slow down x8
int tile = tickState % 2;
setAnimatedTile(-1 - tile, waterFrames[tile][(tickState % 4) / 2]);
if(concreteWallStartTime>0){
long tickTime=System.currentTimeMillis();
if(tickTime-concreteWallStartTime>concreteWallPeriod){
makeHomeBrickWall();
concreteWallStartTime=0;
}
}
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Make home wall a brick wall.
*/
private void makeHomeBrickWall(){
//Draw the player's home area.
for(int i=0;i<6;i++){
for(int j=0;j<4;j++){
setCell(i+(WIDTH_IN_TILES/2-3), HEIGHT_IN_TILES-4+j, BRICK_WALL);
}
}
//this place will be placed with player's flag.
duplicateCell((WIDTH_IN_TILES-2)/2,HEIGHT_IN_TILES-2,0);
concreteWallStartTime=0;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* duplicate adjacent cell with given value. The reason for this ,the width
* for each image tile is 6X6 ,when design the battle fields, for simplicity
* we combine adjacent 2X2 cell to stand for a 12X12 area,i.e the 4 cells
* store the same value.
* @param x the x index of the cell
* @param y the y index of the cell
* @param value the value for the cell
*/
private void duplicateCell(int x,int y,int value){
int maxCols=getColumns()-1;
int maxRows=getRows()-1;
if(x<0 || x>maxCols || y<0 || y>maxRows )
return;
setCell(x, y, value);
setCell(x+1, y, value);
setCell(x, y+1, value);
setCell(x+1, y+1, value);
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 16JAN2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Read the battle from an input stream.
* @param is input stream stores the battle field information.
*/
private void readBattlefield(java.io.InputStream is) throws IOException {
int c = -1;
int x0 = (WIDTH_IN_TILES-NUMBER_IN_TILES)/2;
int y0 = (HEIGHT_IN_TILES-NUMBER_IN_TILES)/2;
int x=0,y=0;
while ((c = is.read()) != -1 && y < NUMBER_IN_TILES) {
switch (c) {
case ' '://empty
case '0':
duplicateCell(x+x0, y+y0, 0);x+=2;
break;
case '1'://snow field
duplicateCell(x+x0, y+y0,SNOW);x+=2;
break;
case '2'://brick wall
duplicateCell(x+x0, y+y0, BRICK_WALL);x+=2;
break;
case '3'://forest
duplicateCell(x+x0, y+y0, FOREST);x+=2;
break;
case '4':
case '5'://water
duplicateCell(x+x0, y+y0, -1 - ((x ^ y) & 1));x+=2;
break;
case '6': //Concrete wall
duplicateCell(x+x0, y+y0, CONCRETE_WALL);x+=2;
break;
case '\n'://new line
y+=2;
x = 0;
break;
default:
}
}
}
}
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