Rotation 1

[Brian56]

Hi All,

I am having some trouble with an effect I am trying to achieve. What I want is to do is have an arrow rotate in the direction of a keypress.

This is what I have and it doesnt quite work correctly

Key.addListener(arrow)
arrow.onKeyDown = function(){
if(Key.Left) this._rotation = 270;
if(Key.Right) this._rotation = 90;
if(Key.Up) this._rotation = 0;
if(Key.Down) this._rotation = 180;
}

Just changing the values does not help.

Any ideas,


Brian

 

[billwatson]

not sure if this will be dependent on the registration point or not

works ok with a quick arrow i made with a reg. point at the bottom of the arrow. arrow not a good choice for instance name (reserved word)

Key.addListener(myArrow);

myArrow.onKeyDown = function(){
myArrow._rotation = Key.direction();
updateAfterEvent()
}

Key.direction = function(){
var UD = Key.isDown(Key.DOWN) - Key.isDown(Key.UP);
var LR = Key.isDown(Key.RIGHT) - Key.isDown(Key.LEFT);
if (UD) return 270-90*UD;
if (LR) return 180-90*LR;
}

UD (up/down) and LR will be -1,0 or 1 depending on what is clicked (boolean test)

 

[Brian56]

Many Thanks, Bill.

Once again I owe you one. Best of all I understand the solution.


Brian.