Quel est l'équivalent AS3 du code AS2 suivant?

Question

Je suis en train de traduire le code AS2 suivant en AS3 parce que j'ai Adobe Flash CC, qui, pour autant que je sache (de la recherche, essais et erreurs), ne supporte pas le code AS2. Toute aide serait grandement appréciée ...

onClipEvent(load) { 
speed = 0; 
acceleration = 0.4; 
speedDecay = 0.96; 
maxSpeed = 10; 
backSpeed = 1; 
} 

onClipEvent(enterFrame) { 
    if(Math.abs(speed) > 0.3) { 
     speed *= speedDecay; 
    }else { 
     speed = 0; 
    } 
    if(Key.isDown(Key.UP)) { 
     if (Math.abs(speed) >= maxspeed) { 
      speed += acceleration; 
      } 
     } 
    if(Key.isDown(Key.DOWN)) { 
     if(speed < 0.5) 
     speed = -2; 
     else 
     speed--; 
    } 
     if (Math.abs(speed)> 0.5) { 
     if (Key.isDown(Key.LEFT)) { 
      _rotation -= 10; 
     } 
     if (Key.isDown(Key.RIGHT)) { 
      _rotation += 10; 
      } 
     } 
     x = Math.sin(_rotation*(Math.PI/180))*speed; 
     y = Math.cos(_rotation*(Math.PI/180))*speed*-1; 

     if (!_root.ground.hitTest(_x+x, _y+y, true)) { 
     _x += x; 
     _y += y; 
     }else { 
     speed -= speed*1.5; 
     } 
} 

Ce code va dans la couche de voiture de mon jeu de voiture.

Answer 1

Mettez ce code à l'intérieur de movieclip de votre voiture sur l'image 1:

var speed: Number = 0; 
var acceleration: Number = 0.4; 
var speedDecay: Number = 0.96; 
var maxSpeed: Number = 10; 
var backSpeed: Number = 1; 
var pressedKeys: Object = {} 

stage.addEventListener(Event.ENTER_FRAME, loop) 
stage.addEventListener(KeyboardEvent.KEY_DOWN, keydown) 
stage.addEventListener(KeyboardEvent.KEY_UP, keyup) 

function keydown(e: KeyboardEvent) { 
    pressedKeys[e.keyCode] = true 
} 
function keyup(e: KeyboardEvent) { 
    if (pressedKeys[e.keyCode]) { 
     pressedKeys[e.keyCode] = false 
    } 
} 

function loop(e: Event) { 
    if (Math.abs(speed) > 0.3) { 
     speed *= speedDecay; 
    } else { 
     speed = 0; 
    } 
    if (pressedKeys[Keyboard.UP]) { 
     if (Math.abs(speed) >= maxSpeed) { 
      speed += acceleration; 
     } 
    } 
    if (pressedKeys[Keyboard.DOWN]) { 
     if (speed < 0.5) 
      speed = -2; 
     else 
      speed--; 
    } 
    if (Math.abs(speed) > 0.5) { 
     if (pressedKeys[Keyboard.LEFT]) { 
      this.rotation -= 10; 
     } 
     if (pressedKeys[Keyboard.RIGHT]) { 
      this.rotation += 10; 
     } 
    } 
    var vx: Number = Math.sin(this.rotation * (Math.PI/180)) * speed; 
    var vy: Number = Math.cos(this.rotation * (Math.PI/180)) * speed * -1; 
    if (!MovieClip(root).ground.hitTestPoint(this.x + vx, this.y + vy, true)) { 
     this.x += vx; 
     this.y += vy; 
    } else { 
     speed -= speed * 1.5; 
    } 
}