fall through one-way platforms?

[AniMittra]

I'm trying to have it so my character can drop down through one way platforms by pressing the down arrow key. Many games with one-way platforms let you do this such as Mario, Kirby, Smash Bros, etc.

I was able to get the conditional working to see if I was standing on something in the "OneWayPlatform" layer, but I can't figure out how to get my character to fall through it. I tried both IgnoreCollision and IgnoreLayerCollision and neither seemed to do anything. My guess is that this has something to do with the layer mask inside the CharacterController2D script, but I have no idea how that works. I am stumped!

If anyone could explain to me how to do this or point me in the right direction that'd be great!

[KellyThomas]

I was looking at this issue a little while back. The solution I opted for was to add a little functionality to partial class. This way I would be able to incorporate any updates to the core CharacterController2D while avoiding most merge/update issues.

The process I used was:

1. Store existing LayerMasks
2. Manipulate LayerMasks when enabling/disabling OneWayPlatforms

Then I set OneWayPlatformsActive = false when the down key is pressed, and OneWayPlatformsActive = true when the key is released.

The code is available in gist here.

[AniMittra]

Oh man thank you so much, I just implemented it and it seems to work! I would've never figured it out without you. I was reading up on the "|" and "&" operators and bitwise stuff to try and work with layer masks but It's much simpler than I thought. I've also never used a partial class before so you taught me something new, brilliant!

I'm truly grateful.