Turn Based Unit Movement Example.

I programmed a turn based unit movement example. The instructions are on the applet screen. The example has 5 units on the screen that can be moved around. You can only move units 2 spaces until the next unit is activated. When no moves are left then there is a message that it is the end of turn and that you need to press the enter key. When that is done then the moves are reset and then you can move the units again. Oh, press on a unit to activate it. There could probably be a few bugs with that mouse selecting since I did not check that feature yet. 

Anyways. Below is the sourcecode. There are around 200 rows of code.

 


import java.awt.*;
import java.applet.*;

public class turnbased_example extends Applet  implements Runnable{

 Graphics bufferGraphics;
    Image offscreen;
    int numunits = 5;
    int unitwidth = 16;
    int unitheight = 16;
    int blinkingunit = 0;
 long blinktime;
 int gameturn = 0;
 boolean endofturn = false;
 int[][] unit = new int[numunits][10]; //unit , exists x y visible moves

 public void init() {
        setBackground(Color.black);
        offscreen = createImage(getSize().width,getSize().height);
        bufferGraphics = offscreen.getGraphics();

        // create units
        for (int i = 0 ; i < numunits ; i++){
         unit[i][0] = 1;
         findgoodunitpos(i);
   unit[i][3] = 1;
   unit[i][4] = 2;
        }
  new Thread(this).start();
 }

 public void findgoodunitpos(int i){

     boolean exitloop = false;
     boolean unitontop = false;
     int newx = 0;
     int newy = 0;
     while ( exitloop == false ) {
      newx = (int)(Math.random()* 15 );
         newy = (int)((Math.random()* 12) + 1);
   // is unit not ontop of other unit then exit loop
   unitontop = false;
       for (int ii = 0 ; ii < numunits ; ii++){
        if (newx == unit[ii][1] && newy == unit[ii][2]){
         unitontop = true;
        }
       }
       if (unitontop == false ) exitloop = true;
     }
     unit[i][1] = newx;
     unit[i][2] = newy;
 }

 public void dounitblinking(){
  if ( System.currentTimeMillis() > blinktime ){
   if ( unit[blinkingunit][3] == 1 ) {
    unit[blinkingunit][3] = 0 ;
   } else {
    unit[blinkingunit][3] = 1;
   }
   blinktime = System.currentTimeMillis() + 500;
  }
 }
 public void resetblink(){
   blinktime = System.currentTimeMillis() + 500;
   unit[blinkingunit][3] = 1;
 }

    public void run() {
        for(;;) { // animation loop never ends
         repaint();
         try {
          if ( endofturn == false ) {
              dounitblinking();
          }
             Thread.sleep(10);
             }
             catch (InterruptedException e) {
             }
     }
    }
     public void update(Graphics g){
     bufferGraphics.clearRect(0,0,getSize().width,getSize().height);
     bufferGraphics.setColor(Color.red);
        bufferGraphics.drawString("Turn based movement Example.",10,10);
        bufferGraphics.drawString("w/s/a/d to move unit. click on unit to activate.",10,237);
        bufferGraphics.drawString("Unit : " + blinkingunit , getSize().width - 64 , 54);
        bufferGraphics.drawString("X : " + unit[blinkingunit][1] , getSize().width - 64 , 64);
        bufferGraphics.drawString("Y : " + unit[blinkingunit][2] , getSize().width - 64 , 74);
  bufferGraphics.drawString("Moves : " + unit[blinkingunit][4] , getSize().width - 64 , 84);
  bufferGraphics.drawString("Turn : " + gameturn , getSize().width - 64 , 94);
        bufferGraphics.drawRect(0,16,getSize().width-64,getSize().height-32);


  // if end of turn
  if ( endofturn == true ) {
   bufferGraphics.drawString("End of Turn" , getSize().width - 64 , 124);
   bufferGraphics.drawString("Press Enter" , getSize().width - 64 , 134);
  }

        // Draw units
        for (int i = 0 ; i < numunits ; i++){
         if ( unit[i][0] == 1 && unit[i][3] == 1){
          bufferGraphics.fillRect(unit[i][1] * unitwidth ,
                unit[i][2] * unitheight ,
                unitwidth ,
                unitheight);
         }
        }

        g.drawImage(offscreen,0,0,this);
     }
    public boolean occupied(int x, int y){
     for (int i = 0 ; i < numunits ; i++){
      if ( unit[i][1] == x ){
      if ( unit[i][2] == y ){
       return true;
      }
      }
     }
     return false;
    }


    public boolean nextmovableunit(){
     for ( int i = 0 ; i < numunits ; i++ ) {
      if ( unit[i][4] > 0 ) {
       resetblink();
       blinkingunit = i;
       resetblink();
       return true;
      }
     }
     return false;
    }


 public void nextturn(){
  boolean allmovesgone = true;
  for ( int i = 0 ; i < numunits ; i++ ) {
   if ( unit[i][4] > 0 ) {
    allmovesgone = false;
   }
  }
  if ( allmovesgone == true ) {
   endofturn = true;
  }
 }

 public boolean keyUp (Event e, int key){
        //System.out.println (" Integer Value: " + key);

  if ( endofturn == true ) {
   if( key == 10 ) // Return/Enter key / end of turn
         {
          gameturn++;
    for ( int i = 0 ; i < numunits ; i++ ) {
     unit[i][4] = 2;
    }
    nextmovableunit();
          endofturn = false;
         }
  }
  if ( endofturn == false ) {

     if( key == 119 ) // w key , up
         {
          if (unit[blinkingunit][2] > 1 &&
           occupied(unit[blinkingunit][1],unit[blinkingunit][2]-1) == false &&
           unit[blinkingunit][4] > 0 ) {
           unit[blinkingunit][2]--;
           unit[blinkingunit][4]--;
           resetblink();
     if (unit[blinkingunit][4] == 0 ){
      nextmovableunit();
     }
     nextturn();
           }
         }
         if( key == 97 ) // a key , left
         {
          if (unit[blinkingunit][1] > 0 &&
            occupied(unit[blinkingunit][1]-1,unit[blinkingunit][2]) == false &&
           unit[blinkingunit][4] > 0 ) {
           unit[blinkingunit][1]--;
           unit[blinkingunit][4]--;
           resetblink();
     if (unit[blinkingunit][4] == 0 ){
      nextmovableunit();
     }
     nextturn();
           }
          }
          if( key == 100 ) // d key , right
          {
           if (unit[blinkingunit][1] < 15 &&
           occupied(unit[blinkingunit][1]+1,unit[blinkingunit][2]) == false &&
            unit[blinkingunit][4] > 0 ) {
           unit[blinkingunit][1]++;
           unit[blinkingunit][4]--;
           resetblink();
     if (unit[blinkingunit][4] == 0 ){
      nextmovableunit();
     }
     nextturn();
          }
         }
         if( key == 115 ) // s key , down
          {
           if ( unit[blinkingunit][2] < 13 &&
           occupied(unit[blinkingunit][1],unit[blinkingunit][2]+1) == false &&
           unit[blinkingunit][4] > 0 ) {
           unit[blinkingunit][2]++;
           unit[blinkingunit][4]--;
           resetblink();
     if (unit[blinkingunit][4] == 0 ){
      nextmovableunit();
     }
     nextturn();
          }
         }
  } // end of endofturn boolean
        return true;
 }

  public boolean mouseUp (Event e, int x, int y) {
        if (e.modifiers == Event.META_MASK) {
            //info=("Right Button Pressed");
        } else if (e.modifiers == Event.ALT_MASK) {
            //info=("Middle Button Pressed");
        } else {
            //info=("Left Button Pressed");
   int mx = x / unitwidth;
   int my = y / unitheight;
   for ( int i = 0 ; i < numunits ; i++ ) {
    if (unit[i][1] == mx && unit[i][2] == my ) {
     resetblink();
     blinkingunit = i;
     resetblink();
    }
   }
        }
        return true;
    }


}