Control a car (MovieClip) with arrow keys for games, ActionScript 3.0

Download car.zip, 496 KB(Flash CS4 professional)

ActionScript Code:

/**************************************

Developed by

Anil kumar N D

anilkumarnd@gmail.com

http://flash-workshop.blogspot.com/



Flash CS4 professional

ActionScript 3.0

29 April,2010


**************************************/




package {

import flash.display.MovieClip;

import flash.events.KeyboardEvent;

import flash.events.Event;




public class car extends MovieClip {




 /***********************************************************************************************

 Default constructor

 ************************************************************************************************/

 public function car():void {
 
  stage.frameRate = 30;

  mc_car.left = false;
 
  mc_car.up = false;
 
  mc_car.right = false;
 
  mc_car.down = false;
 
  mc_car.xFactor = 0;
 
  mc_car.yFactor = 0;
 
  mc_car.speed = 3;
 
  stage.addEventListener(KeyboardEvent.KEY_DOWN,fn_keyDownHandler);
 
  stage.addEventListener(KeyboardEvent.KEY_UP,fn_keyUpHandler);
 
  stage.addEventListener(Event.ENTER_FRAME,fn_enterFrameHandler);

 }




 /***********************************************************************************************



 ************************************************************************************************/

 private function fn_enterFrameHandler(IN_Event:Event):void {
 
 
  switch(mc_car.up){
  
   case(true):
  
    mc_car.y -= mc_car.yFactor;
   
    mc_car.x -= mc_car.xFactor;
   
    switch(mc_car.right){
    
     case(true):
   
      mc_car.rotation += mc_car.speed/2;
    
      break;
    
    }
   
    switch(mc_car.left){
    
     case(true):
   
      mc_car.rotation -= mc_car.speed/2;
    
      break;
    
    }
  
    break;
   
  }
 
  switch(mc_car.down){
  
   case(true):
  
    mc_car.y += mc_car.yFactor;
   
    mc_car.x += mc_car.xFactor;
   
    switch(mc_car.right){
    
     case(true):
   
      mc_car.rotation -= mc_car.speed/2;
    
      break;
    
    }
   
    switch(mc_car.left){
    
     case(true):
   
      mc_car.rotation += mc_car.speed/2;
    
      break;
    
    }
  
    break;
   
  }

  mc_car.yFactor = (-(((Math.abs(mc_car.rotation))/(90/mc_car.speed))-mc_car.speed));

  mc_car.xFactor = (((Math.abs(mc_car.rotation-90))/(90/mc_car.speed))-(mc_car.speed));
 
  switch(true){
  
   case (mc_car.xFactor > mc_car.speed):
  
    mc_car.xFactor = mc_car.speed - (mc_car.xFactor -mc_car.speed );
  
    break;
   
  }
 
 }




 /***********************************************************************************************



 ************************************************************************************************/

 private function fn_keyDownHandler(IN_Event:KeyboardEvent):void {

  switch(IN_Event.keyCode){
  
   case 37:
  
    mc_car.left = true;
   
    break;
   
   case 38:
  
    mc_car.up = true;
   
    break;
   
   case 39:
  
    mc_car.right = true;
   
    break;
   
   case 40:
  
    mc_car.down = true;
   
    break;
  
  }
 

 }




 /***********************************************************************************************



 ************************************************************************************************/

 private function fn_keyUpHandler(IN_Event:KeyboardEvent):void {

  switch(IN_Event.keyCode){
  
   case 37:
  
    mc_car.left = false;
   
    break;
   
   case 38:
  
    mc_car.up = false;
   
    break;
   
   case 39:
  
    mc_car.right = false;
   
    break;
   
   case 40:
  
    mc_car.down = false;
   
    break;
  
  }  
 
 }



}

}