Weird collision solving using RigidBody2D and ConvexPolygonShape2D

[ghsoares]

Godot version

v3.3.2.stable.official

System information

Windows 10

Issue description

I'm creating a space game shooter with procedurally generated asteroids, using Polygon2D as collision. The problem is that using CollisonPolygon2D slows down when generating the collision, so I'm using a ConvexPolygonShape2D instead. Now, when I'm colliding the ship (also a Rigidbody2D) into the asteroid, it starts to glitch a lot, without being able to exit the collision.

CollisionIssue.mp4

Steps to reproduce

1. Create a ConvexPolygonShape2D based Rigidbody2D and set the points in a script;
2. Create another Rigidbody2D that will collide with the first rigidbody;
3. Use Debug>Visible Collision Shapes to visualize the collision contact points.

Minimal reproduction project

Issue.zip

[ghsoares]

It seens that it isn't actually a bug, it is in actually a expectable result if trying to assign points to the ConvexPolygonShape2D that isn't convex, it means that you need to convert a cloud of points to a convex hull points (that's why we have the set_point_cloud function in ConvexPolygonShape2D).
So I'll propose a change on documentation to include a warning to use convex hull points instead of concave points

[Calinou]

Closing in favor of godotengine/godot-docs#5313.