Determining visible area/invisible area of a masked object

0
votes

I have a movie clip named circle_mc(see the image on the link below) and a mask object(movie clip) which determines visible area of the circle. User can change the portion which is visible (extend the red area and make it red+blue, gray area is invisible). I need to find proportion of visible area to invisible area (red+blue/gray) so that I can calculate angle.

http://i52.tinypic.com/33w01le.jpg

1
flashactionscript-3maskvisiblearea
Do you know the angle from the top of the red to the bottom of blue? - The_asMan
I am trying to calculate that angle :) - iguess
How does the user change the portion of visible to non-visible? Do you have a swf-demo? - Jonatan Hedborg
Imagine there are lines which user can pull to extend the area (see the pic on the link below) Mask object can grow so the visible area. I dont have demo, this is imaginary. i52.tinypic.com/2hmgegg.jpg - iguess
I found this function on the web which calculates visible height and width but I dont know how to calculate visible circle area. plasticsturgeon.com/2010/09/… - iguess

1 Answers

0
votes

Here is a working example of a formula.