[help] platforms above platforms

alright, so I'm using the "coordinate rotation" algorithm posted here a while ago by bit101, I added some friction, etc, and got it working pretty well.

unfortunately (and this was an inherent problem that I knew I had to face eventually from the beginning) the way I choose which platform to test a collision against is to see at the very beginning which platform the hero is on top of, and from then on, if he moves left of it, keep checking platforms one to the left until you find the right one, and same with the right. all the platforms are in an array sorted by their _x attribute.

obviously, I run into a problem once I add a platform above another.

does anyone know how to get around this problem, or should I abandon my platform-array choosing algorithm altogether? if so, what's a better way to determine which platform to check collision against, so I don't have to check collision against every platform on every frame?

Is your problem with the jumping

Is your problem with the jumping?

no... the way the program chooses which platform (a single instance of a movie clip that only contains a line) to test against is it checks to see if the hero is between its two ends (it, not physically but mathematically, rotates the coordinates of the hero and the platform so that the platform is flat, and makes sure the hero is between its left and right ends). If it is left of the line, it repeats the process on the "line to the left" (actually, the line that is one index lower in the array holding all the platforms), and same if it's on the right.
unfortunately, the way the array is sorted is according to the platforms' _x attributes, so adding a platform on top of another will put that top platform inbetween the platforms below it in the arrow and mess everything up.


oh yeah... just noticed the jumping actually. I'll fix that really quick, thanks

this should fix the jumping issue

and by "arrow" in the last post I meant "array" =\