Movement around planet works

Planets.gd

@@ -0,0 +1,7 @@
+extends Spatial
+class_name SolarSystem
+
+
+func get_gravitation_acceleration(position: Vector3) -> Vector3:
+	# TODO: Take all planets and their mass into account
+	return ($Earth.transform.origin - position).normalized()

Player.gd

@@ -0,0 +1,59 @@
+extends KinematicBody
+
+
+var acceleration := Vector3(0.0, -9.81, 0.0)
+var velocity := Vector3(0.0, 0.0, 0.0)
+
+var move_speed = 5.0
+var jump_accel = 300.0
+
+export(NodePath) var solar_system
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _physics_process(delta):
+	var move_velocity := Vector3.ZERO
+	var move_acceleration := Vector3.ZERO
+	
+	# Movement and rotation
+	if Input.is_action_pressed("ui_up"):
+		move_velocity.z -= move_speed
+	if Input.is_action_pressed("ui_down"):
+		move_velocity.z += move_speed
+	if Input.is_action_pressed("ui_left"):
+		rotate(transform.basis.y, delta)
+	if Input.is_action_pressed("ui_right"):
+		rotate(transform.basis.y, -delta)
+	
+	# Make movement local
+	move_velocity = transform.basis * move_velocity
+	
+	# Jumping
+	if Input.is_action_just_pressed("ui_select"):
+		move_acceleration.y += jump_accel
+	
+	# Gravity
+	var gravity_acceleration = get_node(solar_system).get_gravitation_acceleration(transform.origin)
+	velocity += (gravity_acceleration * 9.81 - gravity_acceleration * move_acceleration.y) * delta
+	var movement = (move_velocity + velocity) * delta
+	
+	# Apply movement to position
+	var collision = move_and_collide(movement)
+	
+	# Reset the velocity if the body is colliding
+	if collision:
+		velocity = Vector3.ZERO
+	
+	# Rotate down vector to face center of gravity
+	var down = gravity_acceleration
+	var local_down = transform.basis * Vector3.DOWN
+	var angle = local_down.angle_to(down)
+	var axis = local_down.cross(down).normalized()
+	
+	if axis != Vector3.ZERO: # Happens if we're perfectly aligned already (local_down and down are equal)
+		rotate(axis, angle)

project.godot

@@ -8,15 +8,20 @@
 
 config_version=4
 
-_global_script_classes=[  ]
+_global_script_classes=[ {
+"base": "Spatial",
+"class": "SolarSystem",
+"language": "GDScript",
+"path": "res://Planets.gd"
+} ]
 _global_script_class_icons={
-
+"SolarSystem": ""
 }
 
 [application]
 
 config/name="Physics Project"
-run/main_scene="res://InputConverter.tscn"
+run/main_scene="res://World.tscn"
 config/icon="res://icon.png"
 
 [input]