alpha4 rigidbody interaction

DJM

after updating my code to godot 4 alpha, my player (characterbody3d) doesnt interact anymore with rigidbodies i think it has to do with the "move and slide" line. do i need to add something to that function?

velocity = myvelocity
	#apply rigidbodyforces >
	move_and_slide()
	myvelocity = velocity

DJM

i must be doing something wrong gravity isnt applied to my rigid bodies whats wrong with my setup?

cybereality

The rigid body should be the root node. It is working, but since the mesh is not a child, the physics object is invisible.

DJM

@cybereality said: The rigid body should be the root node. It is working, but since the mesh is not a child, the physics object is invisible.

ok now i understand rigidbodies still dont interact with my player though

also whenever i import a .glb file, it creates a scene for it , so the model is never really the root node, wich should simply be a mesh instance right? now i have to save the mesh to an arraymesh file and create a meshinstance of it under the rigidbody myself. this cant be the correct workflow

DJM

am i exporting the glb incorrectly?

DJM

ok im exporting correctly, i needed to check the physics button on import into godot. but is it normal every object gets a null root node?

cybereality

What you can do is right click on the root node (which is a Node3D) and change the type to RigidBody.

DJM

@cybereality said: What you can do is right click on the root node (which is a Node3D) and change the type to RigidBody.

tnx, didnt know that

DJM

still dont know why my character isnt pushing against the rigid bodies. collision layers are correct

DJM

wondering what api changes were made in alpha to the "move_and_slide" code i think i need to add something to the function to make my characterbody interact with non static bodies

velocity = myvelocity
    #apply rigidbodyforces >
    move_and_slide()
    myvelocity = velocity

cybereality

I doubt it's a code issue. If the player is interacting with static bodies, then the code likely works. Maybe something with the node setup on the rigid body objects. Or it could be a bug.

DJM

heres a screen of my rigidbodie setup @Calinou
is there a bug in alpha 4 when interacting with rigidbodies or is there something wrong with my move_and_slide code?

cybereality

Looks correct to me. Can you describe what happens? Does anything move at all (like does gravity work, just not touching the boxes, is there any response from the player?).

DJM

gravity is applied correctly, rigid bodies interact correctly with eachother. player doesnt interact with them and seems to treat them like static bodies, so i can move against them and jump on them but no force is applied to them for when lets say walking aginst them

GlyphTheWolf

Hi,

Hm, that seems strange. I haven't tried Godot 4 yet, but after checking documentation it seems that CharacterBody3D should interact with rigid bodies (based on description), but from your description they behave same as Godot 3 kinematic bodies.

In Godot 3 I had exactly the same behavior you mentioned and I had to change infinite_inertia to false and then check collisions myself and apply force to rigid bodies.

In Godot 4 CharacterBody3D it seems move_and_slide doesn't have any parameters, so I guess this should be working out of the box, but maybe that is not finished yet? Or some change introduced such bug? No idea.

DJM

so move and slide doesnt have any properties? then its a bug i guess same issue in alpha5

DJM

it seems the infinite inertia property in move_and_slide is removed in godot 4.0