Help me understand this code!

Here's the link with the example and code:
http://www.zebra0.com/actionscript/e...all-cursor.php

Basically, what happens is that the ball follows wherever you click. I'm pretty new to actionscript, and I'm trying to break this down and understand completely how it works. I know all the terminology ie where variables are declared, functions, eventlisteners, math etc, but i don't understand how this values allow it to work.

For example, what's up with the variable "dx" and "dy"? Why are they 0 and if they are zero, then how come for the function "frame", the "minx" and "max" vars have Math.abs(dx/dy) added to it if dx=dy=0? Doesn't make sense. Thanks for clearing all of this stuff out.

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Originally Posted by littlemonster

For example, what's up with the variable "dx" and "dy"? Why are they 0

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Only initially; you can see that they are reset to different value in setGoal() function.

Quote:

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Originally Posted by littlemonster

and if they are zero, then how come for the function "frame", the "minx" and "max" vars have Math.abs(dx/dy) added to it if dx=dy=0?

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There is no Math.abs(dx/dy) in the frame() code. Only Math.abs(dx) and Math.abs(dy).

Quote:

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Originally Posted by realMakc

Only initially; you can see that they are reset to different value in setGoal() function.

There is no Math.abs(dx/dy) in the frame() code. Only Math.abs(dx) and Math.abs(dy).

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Well, thanks, that's what I meant for the second one because i was too lazy to write it all out :)