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Player Movement – Mouse follow with Easing

Posted in Game Examples AS3, Movement

Another player movement script: click and hold mouse follow with easing.

Click and hold to make the player follow the mouse:

View Code ACTIONSCRIPT
/**
 * Player Movement - Follow Mouse on click with Easing
 * ---------------------
 * VERSION: 1.0
 * DATE: 9/23/2010
 * AS3
 * UPDATES AND DOCUMENTATION AT: http://www.FreeActionScript.com
 **/
package  
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.MouseEvent;
 
    public class Main extends MovieClip
    {        
        // player
        private var _player:MovieClip;
 
        // player settings
        private var _speed:Number = .1;
        private var _speedCurrent:Number = 0;
        private var _speedMax:Number = .1;
        private var _acceleration:Number = .01;
        private var _decay:Number = .90;
 
        // other vars
        private var _newDestinationX:int;
        private var _newDestinationY:int;
        private var _destinationX:int;
        private var _destinationY:int;
 
        private var _mouseClicked:Boolean = false;
 
        /**
         * Constructor
         */
        public function Main() 
        {
            createPlayer();
 
            // add listeners
            stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
            stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUpHandler);
            stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDownHandler);
        }
 
        private function onMouseDownHandler(e:MouseEvent):void 
        {
            _mouseClicked = true;
        }
 
        private function onMouseUpHandler(e:MouseEvent):void 
        {
            _mouseClicked = false;
        }
 
        /**
         * Creates player
         */
        private function createPlayer():void
        {
            _destinationX = stage.stageWidth / 2;
            _destinationY = stage.stageHeight / 2;
 
            _player = new Player();
            _player.x = stage.stageWidth / 2;
            _player.y = stage.stageHeight / 2;
            stage.addChild(_player);
        }
 
        /**
         * EnterFrame Handlers
         */
        private function enterFrameHandler(event:Event):void
        {            
            if (_mouseClicked)
            {
                _destinationX = stage.mouseX;
                _destinationY = stage.mouseY;
 
                if (_speedCurrent < _speedMax)
                {
                    _speedCurrent += _acceleration;
                }
            }
            else
            {
                if (_speedCurrent > 0.01)
                {
                    _speedCurrent *= _decay;
                }
                else
                {
                    _speedCurrent = 0;
                }
            }
 
 
 
            _player.x += (_destinationX - _player.x) * _speedCurrent;
            _player.y += (_destinationY - _player.y) * _speedCurrent;
 
            rotatePlayer();
        }
 
        private function rotatePlayer():void
        {
            var radians:Number = Math.atan2(_destinationY - _player.y, _destinationX - _player.x);
            var degrees:Number = radians / (Math.PI / 180) + 90;
            _player.rotation = degrees;
        }
 
    }
 
}
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Player movement – click to move

Posted in Game Examples AS3, Movement

Mouse player movement example script.

Click to make the player rotate and go to the mouse (click to go):

View Code ACTIONSCRIPT
/**
 * Player Movement - Go to mouse
 * ---------------------
 * VERSION: 1.0
 * DATE: 9/23/2010
 * AS3
 * UPDATES AND DOCUMENTATION AT: http://www.FreeActionScript.com
 **/
package  
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.MouseEvent;
 
    public class Main extends MovieClip
    {        
        // player
        private var _player:MovieClip;
 
        // player settings
        private var _playerSpeed:Number = 10;
 
        // other vars
        private var _destinationX:int;
        private var _destinationY:int;
 
        /**
         * Constructor
         */
        public function Main() 
        {
            createPlayer();
 
            // add listeners
            stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
            stage.addEventListener(MouseEvent.CLICK, mouseHandler);
        }
 
        /**
         * Creates player
         */
        private function createPlayer():void
        {
            _destinationX = stage.stageWidth / 2;
            _destinationY = stage.stageHeight / 2;
 
            _player = new Player();
            _player.x = stage.stageWidth / 2;
            _player.y = stage.stageHeight / 2;
            stage.addChild(_player);
        }
 
        /**
         * EnterFrame Handlers
         */
        private function enterFrameHandler(event:Event):void
        {            
            _player.x += (_destinationX - _player.x) / _playerSpeed;
            _player.y += (_destinationY - _player.y) / _playerSpeed;
        }
 
        /**
         * Mouse Handlers
         */
        private function mouseHandler(event:MouseEvent):void
        {
            _destinationX = event.stageX;
            _destinationY = event.stageY;
 
            rotatePlayer();
        }
 
        private function rotatePlayer():void
        {
            var radians:Number = Math.atan2(_destinationY - _player.y, _destinationX - _player.x);
            var degrees:Number = radians / (Math.PI / 180) + 90;
            _player.rotation = degrees;
        }
 
    }
 
}
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Player movement – follow mouse

Posted in Game Examples AS3, Movement

Mouse player movement with easing AS3 code example.

Move the mouse to make the player rotate and follow the mouse:

View Code ACTIONSCRIPT
/**
 * Player Movement - Follow Mouse
 * ---------------------
 * VERSION: 1.0
 * DATE: 9/23/2010
 * AS3
 * UPDATES AND DOCUMENTATION AT: http://www.FreeActionScript.com
 **/
package  
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.MouseEvent;
 
    public class Main extends MovieClip
    {        
        // player
        private var _player:MovieClip;
 
        // player settings
        private var _playerSpeed:Number = 10;
 
        // other vars
        private var _destinationX:int;
        private var _destinationY:int;
 
        /**
         * Constructor
         */
        public function Main() 
        {
            createPlayer();
 
            // add listeners
            stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
        }
 
        /**
         * Creates player
         */
        private function createPlayer():void
        {
            _destinationX = stage.stageWidth / 2;
            _destinationY = stage.stageHeight / 2;
 
            _player = new Player();
            _player.x = stage.stageWidth / 2;
            _player.y = stage.stageHeight / 2;
            stage.addChild(_player);
        }
 
        /**
         * EnterFrame Handlers
         */
        private function enterFrameHandler(event:Event):void
        {
            _destinationX = stage.mouseX;
            _destinationY = stage.mouseY;
 
            _player.x += (_destinationX - _player.x) / _playerSpeed;
            _player.y += (_destinationY - _player.y) / _playerSpeed;
 
            rotatePlayer();
        }
 
        private function rotatePlayer():void
        {
            var radians:Number = Math.atan2(_destinationY - _player.y, _destinationX - _player.x);
            var degrees:Number = radians / (Math.PI / 180) + 90;
            _player.rotation = degrees;
        }
 
    }
 
}
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8-way keyboard movement with rotation & velocity

Posted in Game Examples AS3, Movement

This is an optimized AS3 version of the old movement code.

AS3 8-way keyboard player movement with rotation and velocity script.

Click and use Arrow Keys to move:

View Code ACTIONSCRIPT
/**
 * Player Movement - 8-way keyboard with velocity
 * ---------------------
 * VERSION: 1.0
 * DATE: 9/23/2010
 * AS3
 * UPDATES AND DOCUMENTATION AT: http://www.FreeActionScript.com
 **/
package  
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.KeyboardEvent;
    import flash.ui.Keyboard;
 
    public class Main extends MovieClip
    {        
        // player
        private var _player:MovieClip;
 
        // player settings
        private var _maxSpeed:Number = 5;
        private var _rotationSpeed:Number = 5;
        private var _thrust:Number = .5;
        private var _decay:Number = .97;        
 
        private var _currentSpeed:Number = 0;
        private var _speedX:Number = 0;
        private var _speedY:Number = 0;
 
        // movement flags
        private var _movingUp:Boolean = false;
        private var _movingLeft:Boolean = false;
        private var _movingRight:Boolean = false;
 
        /**
         * Constructor
         */
        public function Main() 
        {
            createPlayer();
 
            // add listeners
            stage.addEventListener(Event.ENTER_FRAME, enterFrameHandler);            
            stage.addEventListener(KeyboardEvent.KEY_DOWN, myOnPress);
            stage.addEventListener(KeyboardEvent.KEY_UP, myOnRelease);            
        }
 
        /**
         * Creates player
         */
        private function createPlayer():void
        {
            _player = new Player();
            _player.x = stage.stageWidth / 2;
            _player.y = stage.stageHeight / 2;
            stage.addChild(_player);
        }
 
        /**
         * EnterFrame Handlers
         */
        private function enterFrameHandler(event:Event):void
        {
            // Rotate right or left
            if (_movingRight)
            {
                _player.rotation += _rotationSpeed;
            }
            if (_movingLeft)
            {
                _player.rotation -= _rotationSpeed;
            }
            if (_movingUp)
            {
                _speedX += _thrust * Math.sin(_player.rotation * (Math.PI / 180));
                _speedY += _thrust * Math.cos(_player.rotation * (Math.PI / 180));
            } 
            else{
                // Deccelerate when Up Arrow key is released
                _speedX *= _decay;
                _speedY *= _decay;
            }
 
            // Maintain speed limit
            _currentSpeed = Math.sqrt((_speedX * _speedX) + (_speedY * _speedY));
 
            if (_currentSpeed > _maxSpeed)
            {
                _speedX *= _maxSpeed/_currentSpeed;
                _speedY *= _maxSpeed/_currentSpeed;
            }
 
            // Move _player based on calculations above
            _player.y -= _speedY;
            _player.x += _speedX;
        }
 
        /**
         * Key Press Handlers
         */
        public function myOnPress(event:KeyboardEvent):void
        {
            switch( event.keyCode )
            {
                case Keyboard.UP:
                    _movingUp = true;
                    break;
 
                case Keyboard.LEFT:
                    _movingLeft = true;
                    break;
 
                case Keyboard.RIGHT:
                    _movingRight = true;
                    break;
            }
        }
 
        /**
         * Key Release Handlers
         */
        public function myOnRelease(event:KeyboardEvent):void
        {
            switch( event.keyCode )
            {
                case Keyboard.UP:
                    _movingUp = false;
                    break;
 
                case Keyboard.LEFT:
                    _movingLeft = false;
                    break;
 
                case Keyboard.RIGHT:
                    _movingRight = false;
                    break;
            }
        }
 
    }
 
}
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