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Dimension Reduction
Node Conversion
Physics Bodies
# CharacterBody3D → CharacterBody2D
extends CharacterBody3D # Before
const SPEED = 5.0
const JUMP_VELOCITY = 4.5
const GRAVITY = 9.8
func _physics_process(delta: float) -> void:
velocity.y -= GRAVITY * delta
var input := Input.get_vector("left", "right", "forward", "back")
velocity.x = input.x * SPEED
velocity.z = input.y * SPEED
move_and_slide()
# ⬇️ Convert to:
extends CharacterBody2D # After
const SPEED = 300.0
const JUMP_VELOCITY = -400.0
const GRAVITY = 980.0 # Pixels per second squared
func _physics_process(delta: float) -> void:
velocity.y += GRAVITY * delta
var input := Input.get_vector("left", "right", "up", "down")
velocity.x = input.x * SPEED
# Note: No Z-axis. For platformer, use input.y for jump
move_and_slide()
Camera Conversion
# Camera3D → Camera2D
# Before: Third-person 3D camera
extends SpringArm3D
@onready var camera: Camera3D = $Camera3D
func _process(delta: float) -> void:
spring_length = 10.0
rotate_y(Input.get_axis("cam_left", "cam_right") * delta)
# ⬇️ Convert to:
extends Camera2D # After
@onready var player: CharacterBody2D = $"../Player"
func _process(delta: float) -> void:
global_position = player.global_position
zoom = Vector2(2.0, 2.0) # Adjust to taste
