RigidKinematicBody2d

extends KinematicBody2D
class_name RigidKinematicBody2D

export(Vector2) var linear_velocity = Vector2.ZERO
export(Vector2) var gravity = Vector2(0, 9.8) setget set_gravity
export(float) var dampening = 0.01
export(float, 0.0, 1.0) var bounciness = 0.5

func set_gravity(value:Vector2)->void:
    gravity = value

func set_linear_velocity(value:Vector2)->void:
    linear_velocity = value

func _physics_process(delta)->void:
    linear_velocity += gravity
    var collision = move_and_collide(linear_velocity * delta) #apply physics
    linear_velocity = linear_velocity * (1 - dampening) #reduce speed over time
    if collision: #collision detected
        var normal:Vector2 = collision.normal #surface normal
        var strenght:float = normal.dot(linear_velocity)
        linear_velocity -= normal * strenght * (1 - bounciness) #dampen velocity in floor direction
        linear_velocity = (linear_velocity + collision.remainder).bounce(normal) #bounce off the surface
    print(linear_velocity.x)

func apply_impulse(value:Vector2)->void:
    linear_velocity += value