[Tracker] Godot feature parity

[Demindiro]

This issue is to keep track of what features are still missing to achieve full compatibility with Godot.

Area

Fully implemented

Body

• Contact events (Implement contact events #6)
• Ray pickable: it simply prevents the body from being detected by rays (Implement ray_pickable for bodies, fix raycasts for areas #10)
• Continuous Collision Detection (CCD)
• Axis locking (Implement rotation + translation locking #13)
  • Translation axises cannot be individually locked yet. I'm also not sure if it is worth spending effort into making it work (if it can be made to work properly at all).
• Character controller
• body_test_motion. This is not publicly documented but is present in Godot's source.
• body_test_ray_separation. Ditto.

Won't be implemented

• Margins: they are not relevant in Rapier.

Joints

• 6DOF joint (requires FreeJoint to be implemented upstream)
• Cone twist joint (not sure what exactly it's supposed to do, but it sounds like a BallJoint with limits)
• Pin joint (FixedJoint)
• Slider joint (can be partially implemented with PrismaticJoint, but requires PinslotJoint for rotations)
• Angle limits for hinge joint (requires upstream implementation)

Won't be implemented

• Solver priority: Even Bullet doesn't support this (I've been bamboozled! Damnit)

Soft bodies

Soft bodies can't be implemented as they don't exist. It doesn't seem like they will be implemented soon either (no roadmap).

Spaces

Direct space state

• cast_motion
• get_rest_info
• intersect_shape (Implement intersect_shape #31)

[ValorZard]

So, would someone be able to use a KinematicCharacter with godot rapier and be able to use it without issue?

[Demindiro]

Currently not, as Rapier doesn't have a built-in character controller and this project doesn't provide one yet either. Someone on the Dimforge Discord is (was?) working on one, though I don't know what the status is.

[ValorZard]

So if I wanted to make a game using this, what would I have to do then?

[Demindiro]

I'd ask on the Dimforge Discord about the character controller. Maybe it can be integrated into this project.

If not, something will have to be created from scratch.

[ValorZard]

After checking back, there isnt a character controller, but people have offered to give advice. There will need to be a custom one built