init

2026-07-07 08:17:45 +02:00
commit 2e28afebce
21 changed files with 961 additions and 0 deletions
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+class_name Boat
+extends FloatingBody
+
+## All force values are per-kilogram (they get multiplied by mass), so the
+## boat handles the same if you change its mass later.
+@export var engine_power := 12.0        # forward thrust, m/s² at full throttle
+@export var reverse_ratio := 0.4        # reverse is weaker, like a real prop
+@export var throttle_response := 1.5    # how fast the engine spools up/down
+@export var rudder_strength := 2.5      # turning torque at speed
+@export var keel_grip := 3.0            # resistance to sliding sideways
+
+var desired_throttle := 0.0
+var throttle := 0.0
+
+
+func _physics_process(delta: float) -> void:
+	super(delta)
+
+	if Input.is_action_pressed("throttle_increase"):
+		desired_throttle = move_toward(desired_throttle, 1, 0.005)
+	elif Input.is_action_pressed("throttle_decrease"):
+		desired_throttle = move_toward(desired_throttle, -1, 0.006)
+	elif Input.is_action_pressed("throttle_stop"):
+		desired_throttle = 0.0
+	
+	throttle = move_toward(throttle, desired_throttle, throttle_response * delta)
+
+	# boat's forward direction, flattened onto the water plane
+	var forward := -global_basis.z
+	forward.y = 0.0
+	forward = forward.normalized()
+
+	# --- engine ---
+	var power := engine_power * (reverse_ratio if throttle < 0.0 else 1.0)
+	apply_central_force(forward * throttle * power * mass * submerged_ratio)
+
+	# --- rudder: only bites when water flows past it ---
+	var steer_input := Input.get_axis("rudder_right", "rudder_left")
+	var forward_speed := linear_velocity.dot(forward)
+	var rudder_bite := clampf(forward_speed / 3.0, -1.0, 1.0)
+	apply_torque(Vector3.UP * steer_input * rudder_strength * rudder_bite * mass * submerged_ratio)
+
+	if submerged_ratio <= 0.0:
+		return   # airborne: no thrust, no rudder, no keelffffff
+
+	# --- keel: kill sideways sliding ---
+	var right := global_basis.x
+	right.y = 0.0
+	right = right.normalized()
+	var lateral_speed := linear_velocity.dot(right)
+	apply_central_force(-right * lateral_speed * keel_grip * mass * submerged_ratio)