void Awake() { instance = this; showColor = new byte[size * size * 4]; material = GetComponent <MeshRenderer>().material; pencil = new Pencil(); pencil.Init(this, size, size, curve); pen = new Pen(); pen.Init(this, size, size, curve); eraser = new Eraser(); eraser.Init(this, size, size, curve); curBrush = pen; layerMgr = LayerMgr.GetInstance(); }