godot-demo-projects/2d/bullet_shower/player.gd

extends Node2D
# This demo is an example of controling a high number of 2D objects with logic
# and collision without using nodes in the scene. This technique is a lot more
# efficient than using instancing and nodes, but requires more programming and
# is less visual. Bullets are managed together in the `bullets.gd` script.

## The number of bullets currently touched by the player.
var touching := 0

@onready var sprite: AnimatedSprite2D = $AnimatedSprite2D


func _ready() -> void:
	# The player follows the mouse cursor automatically, so there's no point
	# in displaying the mouse cursor.
	Input.set_mouse_mode(Input.MOUSE_MODE_HIDDEN)


func _input(event: InputEvent) -> void:
	# Getting the movement of the mouse so the sprite can follow its position.
	if event is InputEventMouseMotion:
		position = event.position - Vector2(0, 16)


func _on_body_shape_entered(_body_id: RID, _body: Node2D, _body_shape_index: int, _local_shape_index: int) -> void:
	# Player got touched by a bullet so sprite changes to sad face.
	touching += 1
	if touching >= 1:
		sprite.frame = 1


func _on_body_shape_exited(_body_id: RID, _body: Node2D, _body_shape_index: int, _local_shape_index: int) -> void:
	touching -= 1
	# When non of the bullets are touching the player,
	# sprite changes to happy face.
	if touching == 0:
		sprite.frame = 0