godot-2d-movement

1# Godot 2D Movement (4.x)
2 
3Build responsive 2D character controllers with `CharacterBody2D` and the argument-less
4`move_and_slide()`. Targets **Godot 4.7**.
5 
6## When to use
7 
8- Use when scripting a 2D player/enemy that moves and collides: platformer (gravity +
9  jump) or top-down (free 8-direction), slope walking, or wall/floor detection.
10- Use when `move_and_slide()` "does nothing", the character sinks through floors, or
11  `is_on_floor()` is always false.
12 
13**When *not* to use:** dynamic rigid bodies, areas, raycasts, collision layers →
14`godot-physics`; tile-based levels → `godot-tilemap`; full platformer game template →
15the `platformer` genre skill; engine-agnostic feel tuning → `physics-tuning`.
16 
17## Core workflow
18 
191. **Use `CharacterBody2D`** with a `CollisionShape2D` child. It is script-driven: it
20   does not fall or react to forces on its own.
212. **Set the `velocity` property, then call `move_and_slide()`** (no arguments in 4.x).
22   The method reads `velocity`, moves the body, slides along surfaces, and updates
23   `velocity` to reflect what actually happened.
243. **Do it in `_physics_process(delta)`** — `move_and_slide()` uses the physics step's
25   delta internally, so do not multiply `velocity` by `delta` yourself.
264. **Platformer:** add gravity to `velocity.y` each tick, jump by setting `velocity.y`
27   negative when `is_on_floor()`.
285. **Top-down:** build a direction from input and scale by speed; set
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