An one-button way to control the player coming from the past
I always loved one-button games. First, they can be played with just one button. Second, in the mobile game era, it’s easy to port an on-button concept to an one-tap concept.
Almost five years ago (ages!!) I showed a strange way to move the player with Flash made with AS2, and I find it interesting to port it to AS3, to be ported again in other languages.
Since you can find the complete theory in the original post, I will just post the AS3 source code:
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package { import flash.display.Sprite; import flash.events.Event; import flash.events.MouseEvent; import flash.text.TextField; public class Main extends Sprite { private var ball:Ball=new Ball(); private var directionArrow:DirectionArrow=new DirectionArrow(); private var powerText:TextField = new TextField(); private var rotate:Boolean=true; private var power:Number=0; private var xSpeed:Number=0; private var ySpeed:Number=0; private var friction:Number=0.975; private var rotationSpeed:Number=5; public function Main() { addChild(ball); ball.x=320; ball.y=240; ball.addChild(directionArrow); powerText.textColor = 0xffffff; powerText.y=-10; powerText.x=-5; powerText.visible=false; ball.addChild(powerText); addEventListener(Event.ENTER_FRAME,update); stage.addEventListener(MouseEvent.MOUSE_DOWN,prepareLaunch); stage.addEventListener(MouseEvent.MOUSE_UP,launch); } private function prepareLaunch(e:MouseEvent):void { powerText.visible=true rotate=false; } private function launch(e:MouseEvent):void { if (! rotate) { powerText.visible=false; rotate=true; xSpeed+=power*Math.cos((directionArrow.rotation-90)*0.0174532925)/10; ySpeed+=power*Math.sin((directionArrow.rotation-90)*0.0174532925)/10; power=0; rotationSpeed*=-1; } } private function update(e:Event):void { if (rotate) { directionArrow.rotation+=rotationSpeed; } else { power++; power=Math.min(power,50); powerText.text=power.toString(); } ball.x+=xSpeed; ball.y+=ySpeed; xSpeed*=friction; ySpeed*=friction; } } } |
and this is the result:
Press and keep the mouse pressed to move the ball with a given direction and speed
During next days I’ll port this prototype into the most famous formats.
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This post has 6 comments
Georgiou Georgios
Hi Emanuele,
Thanx for the free code. Unfortunatelly does not works on Flash CS4. I hope to produce it for other versions of Flash.
lbineau
Hi,
I’ve done a quick version with Haxe NME
HTML5 : http://dl.dropbox.com/u/5239872/one_button/bin/html5/bin/index.html
AS3 : http://dl.dropbox.com/u/5239872/one_button/bin/flash/bin/onebutton.swf
But you can target Android or iOS with the same source code !(http://dl.dropbox.com/u/5239872/one_button/one_button.zip) :-)
egdcltd
A bit off topic I know, but what plugin are you using to display the code in your posts?
jujuwiwi
@egdcltd : have a look to the source. It’s wp_syntax for wordpress : http://wordpress.org/extend/plugins/wp-syntax/
egdcltd
Thanks jujuwiwi, I did look at the source but I must have missed that.
Jack
So would it be fine if i were to implement this into a game for the iOS platform? Or were you planning on actually using it?