Re: [flasher] constraining drag along angle

[Helen Triolo]

Matt,


If you constrain your mc drag to a square and then use 


  this._y = this._x;


in your onClipEvent(enterFrame) --or whatever kind of loop or routine

you use to move the object-- that should keep it moving only along a 45

degree line inside the square.


If you need a different angle (specified in degrees between 0 and 90),

you'd need something like


  this._y = (this._x * Math.tan(angle*Math.PI/180));


(or maybe subtract the value on the right from the height of the

constraining rectangle to get it to move from lower left to upper

right).


The math behind this is tan(angle-in-radians) = y/x, and to convert an

angle in radians to an angle in degrees, you multiply by pi and divide

by 180.  A good reference page for this is

http://www.npac.syr.edu/REU/reu94/williams/ch1/section3_4.html 


Regards,

Helen 

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Matt wrote:

> 

> Hi,

> 

> Does anyone know how to create a draggable MC, that would slide along an

> angled axis, say, 45 degrees? So that when you moved your mouse back and

> forth along the x-axis, the MC would slide in lockstep with the X, but

> along a 45 degree angle on the Y? does anyone know of examples of this?

> 

> TIA,

> 

> Matt