Initial Commit

player_q3/PlayerQ3.gd

@@ -0,0 +1,110 @@
+extends CharacterBody3D
+
+const DIST_FLOOR_SNAP := Vector3.DOWN * 0.2
+
+@onready var body : Node3D = $Body
+@onready var head : Node3D = $Body/Head
+@onready var cam : Camera3D = $Body/Head/Camera3D
+
+@export var mouse_sensitivity = 5.0
+
+@export var stop_speed = 4.0
+@export var move_speed = 20.0
+@export var max_slope_angle = 50.0
+
+@export var gravity = 60.0
+@export var max_fall_speed = 50.0
+@export var jump_height = 2.5
+
+@export var accel_ground = 10.0
+@export var accel_air = 1.0
+#export var accel_water: float := 4.0
+
+@export var friction_ground = 6.0
+#export var friction_water: float := 1.0
+
+
+var floor_snap := Vector3.ZERO
+
+
+func get_move_direction() -> Vector3:
+	
+	var input_dir := Vector2(
+		Input.get_action_strength("move_backward") - Input.get_action_strength("move_forward"),
+		Input.get_action_strength("move_right") - Input.get_action_strength("move_left")
+	).normalized();
+	
+	return input_dir.x * body.global_transform.basis.z + input_dir.y * body.global_transform.basis.x
+
+
+func _input(event):
+	if Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED and event is InputEventMouseMotion:
+		rotate_look(event.relative * 0.001 * mouse_sensitivity)
+
+
+func rotate_look(amount : Vector2) -> void:
+	body.rotation.y -= amount.x
+	head.rotation.x = clamp(head.rotation.x - amount.y, -PI * 0.5, PI * 0.5)
+
+
+func _physics_process(delta):
+	
+	var was_on_floor : bool = is_on_floor()
+	var h_target_dir : Vector3 = get_move_direction()
+	
+	if is_on_floor():
+		apply_friction(delta)
+		accelerate(delta, h_target_dir, move_speed, accel_ground)
+		if Input.is_action_pressed("jump"):
+			velocity.y = sqrt(2 * jump_height * abs(gravity))
+			floor_snap = Vector3.ZERO
+	else:
+		# hack: only add gravity not checked ground, to prevent sliding checked slopes 
+		# This works because move_and_slide_with_snap warps the player to the ground in other cases
+		velocity.y = max(-max_fall_speed, velocity.y - gravity * delta)
+		accelerate(delta, h_target_dir, move_speed, accel_air)
+	
+	set_velocity(velocity)
+	# TODOConverter40 looks that snap in Godot 4.0 is float, not vector like in Godot 3 - previous value `floor_snap`
+	set_up_direction(Vector3.UP)
+	set_floor_stop_on_slope_enabled(true)
+	set_max_slides(4)
+	set_floor_max_angle(deg_to_rad(max_slope_angle))
+	# TODOConverter40 infinite_inertia were removed in Godot 4.0 - previous value `false`
+	move_and_slide()
+	velocity = velocity
+	
+	if !was_on_floor and is_on_floor():
+		floor_snap = DIST_FLOOR_SNAP
+	elif was_on_floor and !is_on_floor():
+		floor_snap = Vector3.ZERO
+
+
+func accelerate(delta : float, p_target_dir : Vector3, p_target_speed : float, p_accel : float):
+	var current_speed : float = velocity.dot(p_target_dir)
+	var add_speed : float = p_target_speed - current_speed
+	if add_speed > 0:
+		var accel_speed : float = min(add_speed, p_accel * delta * p_target_speed)
+		velocity += p_target_dir * accel_speed
+
+
+func apply_friction(delta : float):
+	
+	var vec : Vector3 = velocity
+	var speed : float = velocity.length()
+	if is_zero_approx(speed):
+		velocity = Vector3.ZERO
+		return
+	
+	var drop : float = 0.0
+	var control : float = max(speed, stop_speed)
+	
+	# ground friction
+	if is_on_floor():
+		drop += control * friction_ground * delta
+	
+	# water friction not implemented
+	var new_speed : float = max(0.0, speed - drop)
+	new_speed /= speed
+	
+	velocity *= new_speed