extends KinematicBody

var movement_amplifier = 10
var velocity = Vector3()
var desired_velocity = Vector3()
var friction = 0.1
var gravity_strength = -60
var facing_direction = Vector3()
var direction = Vector3()
var upwards_direction = Vector3(0, 1, 0)

func right_of():
    return -facing_direction.rotated(Vector3(0, 1, 0), deg2rad(-90))

func left_of():
    return -facing_direction.rotated(Vector3(0, 1, 0), deg2rad(90))

var highest_reached = 0

func _process(delta):
#   Gravity and deacceleration
    velocity.y+=gravity_strength*delta
    desired_velocity=Vector3(0, 0, 0)

#   Variable friction
    if is_on_floor():
        friction = 10
    else:
        friction = 1
    friction*=delta

#   Input handling
    if Input.is_action_pressed("forward"):
        desired_velocity += -facing_direction * movement_amplifier
    if Input.is_action_pressed("backward"):
        desired_velocity += facing_direction * movement_amplifier
    if Input.is_action_pressed("left"):
        desired_velocity += left_of() * movement_amplifier
    if Input.is_action_pressed("right"):
        desired_velocity += right_of() * movement_amplifier
    if Input.is_action_pressed("jump") and is_on_floor():
        velocity.y += 4*movement_amplifier
        desired_velocity.y += 4*movement_amplifier
    facing_direction = global_transform.basis.z

#   Gradually go from your velocity, to your desired velocity - thanks to lerp()
    velocity = move_and_slide(lerp(velocity, desired_velocity, friction), upwards_direction)