3D character controller using root motion

[haiduc]

Hello, everyone!

I've been loving my Godot journey so far and got a working 3D third person character controller. Now my focus is transitioning it to root motion.

Got some Mixamo animations and added the root bone using a Blender add-on. The RootMotionView node is picking the movement up nicely.

I am only able to move the character on the Z axis. Here's my code (Godot 4.1):

_physics_process(delta: float):
	var root_motion = animation_tree.get_root_motion_position()
	var input_direction := Input.get_vector("left", "right", "forward", "back")
	var direction := transform.basis * Vector3(input_direction.x, 0, input_direction.y)

	direction = direction.rotated(Vector3.UP, spring_arm.rotation.y).normalized()
	
	if is_on_floor(): 
		velocity = direction * root_motion / delta
	
	if direction:
		mesh.rotation.y = lerp_angle(mesh.rotation.y, atan2(-velocity.x, -velocity.z)

animation_tree.get_root_motion_position() returns vectors like (-0.000207, 0, 0.077832) so I'm sure that it's related to the velocity I'm setting.

Thanks for reading my post, any help is appreciated!

[haiduc]

Figured it out. Here's the code for anyone interested:

_physics_process(delta: float):
	var root_motion := animation_tree.get_root_motion_position()
	var input_direction := Input.get_vector("left", "right", "forward", "back")
	var direction := transform.basis * Vector3(input_direction.x, 0, input_direction.y)
  var current_rotation := transform.basis.get_rotation_quaternion().normalized()
	var horizontal_rotation = camera_rig.global_transform.basis.get_euler().y
	var horizontal_velocity = current_rotation * root_motion / delta

	direction = Vector3(input_direction.x, 0, input_direction.y)
	direction = direction.rotated(Vector3.UP, horizontal_rotation).normalized()

	velocity = Vector3(horizontal_velocity.x, velocity.y, horizontal_velocity.z)

	if direction:
    rotation.y = lerp_angle(rotation.y, atan2(direction.x, direction.z), lerp_weight)