Linear expression is not working

[Suraiya A]

Hi,

I am experimenting lInear expression. but not getting expected result. What I imagined is when the ball will touch the edge of the comp it will  disapper, because in my expression I wrote that, but the ball remain transparent, I can see it, it supposed to be gone (I mean opacity zero means its not visible). I must have done someting wrong. guide me please. 😥

[Dan Ebberts · Accepted solution]

Is "target" the layer in the center? If so, the last line of your expression probably needs to be more like this:

linear(b,0,540,100,0)

[Suraiya A]

😮 😮 😮  You are sooo right!!! 😮  Now it works. 

Thank you so much.