thewheelbarrow/3d-car-game
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

added damping force

Browse Source
This commit is contained in:
thatTopHatCat
2025-07-12 13:06:10 -04:00
parent 722732590b
commit 75ae5521fd
2 changed files with 14 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
wheel.gd
View File

@@ -4,6 +4,7 @@ extends RayCast3D
@export var wheel_radius: float = 0.316
@export var suspension_rest_length: float = 0.1
@export var suspension_stiffness: float = 250_000
@export var suspension_damping: float = 2000
func _ready() -> void:
target_position *= suspension_rest_length + wheel_radius
@@ -11,10 +12,10 @@ func _ready() -> void:
func apply_forces(car: Car) -> void:
force_raycast_update()
var force: Vector3 = get_suspension_force()
var force: Vector3 = get_suspension_force(car)
car.apply_force(force, car.to_local(get_collision_point()))
func get_suspension_force() -> Vector3:
func get_suspension_force(car: Car) -> Vector3:
var up: Vector3 = global_basis.y
if not is_colliding():
$"RX-Wheel".position = -up * suspension_rest_length
@@ -26,7 +27,13 @@ func get_suspension_force() -> Vector3:
var suspension_length: float = -up.dot(wheel_center)
var suspension_displacement: float = suspension_rest_length - suspension_length
#https://en.wikipedia.org/wiki/Hookes_law
var y_force_scalar: float = suspension_stiffness * suspension_displacement
var hookes_force_scalar: float = suspension_stiffness * suspension_displacement
var wheel_velocity: Vector3 = car.get_velocity_at_point(car.to_local(to_global(wheel_center)))
var wheel_up_velocity: float = up.dot(wheel_velocity)
var damping_force_scalar: float = suspension_damping * wheel_up_velocity
var y_force_scalar: float = hookes_force_scalar - damping_force_scalar
var force: Vector3 = Vector3.UP * y_force_scalar
return force