[Godot 4] RigidBody2D gets stuck when moving along tilemap floor

[popcar2]

Godot version

4.0.beta16

System information

Windows 11, RTX 3060Ti, Compatibility backend

Issue description

The Issue

RigidBody2D seems to have a tendency of getting stuck in-between tiles. Using square corners, my RigidBody2D box would constantly get stuck when I'm applying force along the X axis. This issue doesn't seem to happen when the RigidBody2D is on a completely smooth surface like a StaticBody2D. It's also worth noting that I have rotation disabled on the box.
I triple checked and am sure that my tiles all have a square physics shape.

Video showcasing the issue:

Bad_Slide.mp4

Video showcasing the same box on a StaticBody2D (this is how it should be):

Good_Slide.mp4

The Band-Aid Solution

A simple but not perfect fix would be to never use square edges when interacting with a tilemap. Something like this sort of works:

But unfortunately this makes stacking boxes more difficult, and the issue doesn't go away completely. The box still bumps slightly when moved along the tilemap:

Bumpy_Slide.mp4

Proposal

As a Unity developer that's coming in hot to Godot, this is exactly why we have composite colliders there. Every tile having its own separate collider is bound to cause issues. A way to bake collisions would be an instant fix. I see that Godot already has a CollisionPolygon2D, maybe there can be an automatic way to wrap the Tilemap with it?

Steps to reproduce

• Draw a tilemap
• Create a RigidBody2D with a rectangle collider
• Place it on the tilemap and apply force along the X axis
• Watch it get stuck at some point

Minimal reproduction project

Platformer Quickstart.zip

Run the "Level 1" scene. Press 'X' to spawn a box, hold 'R' to restart the scene.

[Calinou]

Duplicate of #47148 (and possibly others).

[Rulft44]

Was looking for a fix on this issue too and stumbled across this https://github.com/popcar2/GodotTilemapBaker
It fixed the issue.