AS3 캐릭터 점프/낙하 문제

Question

위쪽 화살표를 누르면 점프/실패하는 데 문제가 있습니다. 나는 위로 화살표 키를 눌렀을 때 특정 높이로 떨어지면 떨어지게하려고합니다.

public var gravity:int = 2; 



public function fireboyMovement(e:KeyboardEvent):void 
    { 
     if (e.keyCode == 37) //right 
     { 
      fireboy1.x = fireboy1.x -5; 
      checkBorder() 

     } 
     else if (e.keyCode == 39) //left 
     { 
      fireboy1.x = fireboy1.x +5; 
      checkBorder() 

     } 
     if (e.keyCode == 38) //up 
     { 
      fireboy1.y = fireboy1.y -20; 
      fireboy1.y += gravity; 
      checkBorder() 
     } 

Answer 1

문제는 시간이 지남에 (그리고 모든 번) 선수의 위치를 ​​증가 할 필요가있다 :

여기 내 이동 코드입니다.

트위닝 엔진 (tweenlite와 같은)을 사용하거나 자신의 타이머를 굴리거나 프레임 처리기를 입력 할 수 있습니다.

if (e.keyCode == 38) //up 
    { 
     if(!isJumping){ 
      isJumping = true; 
      velocity = 50; //how much to move every increment, reset every jump to default value 
      direction = -1; //start by going upwards 
      this.addEventListener(Event.ENTER_FRAME,jumpLoop); 
     } 
    } 

---

var isJumping:Boolean = false; 
var friction:Number = .85; //how fast to slow down/speed up - the lower the number the quicker (must be less than 1, and more than 0 to work properly) 
var velocity:Number; 
var direction:int = -1; 

function jumpLoop(){ //this is running every frame while jumping 
    fireboy1.y += velocity * direction; //take the current velocity, and apply it in the current direction 
    if(direction < 0){ 
     velocity *= friction; //reduce velocity as player ascends 
    }else{ 
     velocity *= 1 + (1 - friction); //increase velocity now that player is falling 
    } 

    if(velocity < 1) direction = 1; //if player is moving less than 1 pixel now, change direction 
    if(fireboy1.y > stage.stageHeight - fireboy1.height){ //stage.stageheight being wherever your floor is 
     fireboy1.y = stage.stageHeight - fireboy1.height; //put player on the floor exactly 
     //jump is over, stop the jumpLoop 
     this.removeEventListener(Event.ENTER_FRAME,jumpLoop); 
     isJumping = false; 
    } 
}