Player is pulled up/aside when dealing with one-way platforms

[passiomatic]

This is due to the way I'm implementing the check to block (or not) the player while it jumps on a one-way platform from below.

Here (https://github.com/passiomatic/sunny-land/blob/main/src/Physics.elm#L284) I'm projecting the player velocity along the wall normal and see if they have the same direction. If this is the case the player is coming from behind/below the wall and the game doesn't block him.

This is a simple check and works well, but it has one quirk: if the player doesn't jump high enough to reach the platform he ends up halfway and the moment the velocity starts inverting its direction (because of gravity) a collision is generated and an impulse is calculated "fixing" his position abruptly.

Fix: use code from https://github.com/passiomatic/platformer-physics