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Draw Controller - Version 0
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| public class DrawController : MonoBehaviour | |
| { | |
| public DrawRectangle RectanglePrefab; | |
| private readonly List<DrawRectangle> _allShapes = new List<DrawRectangle>(); | |
| private DrawRectangle CurrentShapeToDraw { get; set; } | |
| private bool IsDrawingShape { get; set; } | |
| private void Update() | |
| { | |
| var mousePos = (Vector2) Camera.main.ScreenToWorldPoint(Input.mousePosition); | |
| var click = Input.GetKeyUp(KeyCode.Mouse0); | |
| var canUpdateShape = CurrentShapeToDraw != null && IsDrawingShape; | |
| if (click) { | |
| AddShapeVertex(mousePos); | |
| } else if (canUpdateShape) { | |
| UpdateShapeVertex(mousePos); | |
| } | |
| } | |
| /// <summary> | |
| /// Adds a new vertex to the current shape at the given position, | |
| /// or creates a new shape if it doesn't exist | |
| /// </summary> | |
| private void AddShapeVertex(Vector2 position) | |
| { | |
| if (CurrentShapeToDraw == null) { | |
| // No current shape -> instantiate a new shape and add two vertices: | |
| // one for the initial position, and the other for the current cursor | |
| var prefab = RectanglePrefab; | |
| CurrentShapeToDraw = Instantiate(prefab); | |
| CurrentShapeToDraw.name = "Shape " + _allShapes.Count; | |
| CurrentShapeToDraw.AddVertex(position); | |
| CurrentShapeToDraw.AddVertex(position); | |
| IsDrawingShape = true; | |
| _allShapes.Add(CurrentShapeToDraw); | |
| } else { | |
| // Current shape exists -> add vertex if finished and reset reference | |
| IsDrawingShape = !CurrentShapeToDraw.ShapeFinished; | |
| if (IsDrawingShape) { | |
| CurrentShapeToDraw.AddVertex(position); | |
| } else { | |
| CurrentShapeToDraw = null; | |
| } | |
| } | |
| } | |
| /// <summary> | |
| /// Updates the current shape's latest vertex position to allow | |
| /// a shape to be updated with the mouse cursor and redrawn | |
| /// </summary> | |
| private void UpdateShapeVertex(Vector2 position) | |
| { | |
| if (CurrentShapeToDraw == null) { | |
| return; | |
| } | |
| CurrentShapeToDraw.UpdateShape(position); | |
| } | |
| } |
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