add 注释

.idea/.idea.2ddemo/.idea/.name

@@ -0,0 +1 @@
+2ddemo

Player.cs

@@ -22,30 +22,38 @@ public partial class Player : Area2D
 	// Called every frame. 'delta' is the elapsed time since the previous frame.
 	public override void _Process(double delta)
 	{
+		// Player坐标， 初始化0，0
 		var velocity = Vector2.Zero; // The player's movement vector.
 
+		// 如果按下右键 X轴+1
 		if (Input.IsActionPressed("move_right"))
 		{
 			velocity.X += 1;
 		}
 
+		// 左键 X轴-1
 		if (Input.IsActionPressed("move_left"))
 		{
 			velocity.X -= 1;
 		}
 
+		// 下键 Y轴+1
 		if (Input.IsActionPressed("move_down"))
 		{
 			velocity.Y += 1;
 		}
 
+		// 上键 Y轴-1
 		if (Input.IsActionPressed("move_up"))
 		{
 			velocity.Y -= 1;
 		}
 
+		
+		// 动画  获取AnimatedSprite2D节点
 		var animatedSprite2D = GetNode<AnimatedSprite2D>("AnimatedSprite2D");
 
+		// 如果坐标的length大于0
 		if (velocity.Length() > 0)
 		{
 			velocity = velocity.Normalized() * Speed;