game/testing/Buoyancy-in-Godot-4-master/Cube.gd


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extends RigidBody3D

@export var float_force := 1.0
@export var water_drag := 0.05
@export var water_angular_drag := 0.05

@onready var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
@onready var water = get_node('/root/Main/Water')

@onready var probes = $ProbeContainer.get_children()

var submerged := false

# 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 _process(delta):
   pass

func _physics_process(delta):
   submerged = false
   for p in probes:
      var depth = water.get_height(p.global_position) - p.global_position.y 
      if depth > 0:
         submerged = true
         apply_force(Vector3.UP * float_force * gravity * depth, p.global_position - global_position)

func _integrate_forces(state: PhysicsDirectBodyState3D):
   if submerged:
      state.linear_velocity *=  1 - water_drag
      state.angular_velocity *= 1 - water_angular_drag