Improved ray shape (2D and 3D) by addiing the possibility to act as r…

[AndreaCatania]

…egular shape

As you know the ray_shape is special shape that should be used only for rigidbody in character mode. (and this is a bit restricting IMO)

With this PR we will be able to tell the engine to handle the special ray_shape as a regular shape in order to allow us to use it anywhere.

In order to active it I've added the parameter slips_on_slope in the ray_shape that when true allow the shape to behave as all other shapes (basially it will return the correct normal) [By default this parameter is set to false]

I've i'mplemented it on 2D, 3D godot physics and 3D Bullet physics

[AndreaCatania]

@n-pigeon Probably this may interest you

[leiget]

I'm just curious as to how this is intended to be used. What's the benefit of having it be regular shape?

[AndreaCatania]

In this moment the ray shape is an trick that exists only to facilitate the creation of rigidbody in character mode.

By using it the normal points always in the direction of Ray shape and the character can walk uphill or stay still on a slope without problems.

But if you need to use it in a more realistic scene you can't since the friction response and other forces are not properly handled

What's the benefit of having it be regular shape?

The benefit is the fact that it can be used for general purpose things like all other shapes, and what you can do with it (now) is just limited by your fantasy.