Hyperparticle

public class DrawTriangle : DrawShape 
{
    // ...
    
    private PolygonCollider2D _polygonCollider2D;

    // Triangle vertices (in absolute coordinates)
    private readonly List<Vector2> _vertices = new List<Vector2>(3);
    
    public override bool ShapeFinished { get { return _vertices.Count >= 3; } }

Hyperparticle

public class DrawController : MonoBehaviour
{
    public DrawMode Mode = DrawMode.Rectangle;

    public DrawShape RectanglePrefab;
    public DrawShape CirclePrefab;
    public DrawShape TrianglePrefab;

    // Associates a draw mode to the prefab to instantiate
    private Dictionary<DrawMode, DrawShape> _drawModeToPrefab;

Hyperparticle

public class DrawCircle : DrawShape 
{
    private CircleCollider2D _circleCollider2D;

    // ...
	
    private void Awake()
    {
        _circleCollider2D = GetComponent<CircleCollider2D>();
        

Hyperparticle

public abstract class DrawShape : MonoBehaviour 
{ 
    /// <summary> 
    /// Whether all the points in the shape have been specified 
    /// </summary> 
    public abstract bool ShapeFinished { get; } 
     
    /// <summary> 
    /// The status of whether the shape is simulating its physics. 
    /// Setting this property will enable or disable physics. 

Hyperparticle

public class DrawController : MonoBehaviour
{
    // ...

    private void AddShapeVertex(Vector2 position)
    {
        if (CurrentShapeToDraw == null) {
            // ...
        } else {
            if (IsDrawingShape) {

Hyperparticle

public class DrawRectangle : MonoBehaviour 
{
    // ...

    private Rigidbody2D _rigidbody2D;
    private BoxCollider2D _boxCollider2D;
    
    private bool _simulating;
    public bool SimulatingPhysics
    {

Hyperparticle

public static class Util
{
    /// <summary>
    /// Extension that converts an array of Vector2 to an array of Vector3
    /// </summary>
    public static Vector3[] ToVector3(this Vector2[] vectors)
    {
        return System.Array.ConvertAll<Vector2, Vector3>(vectors, v => v);
    }

Hyperparticle

public class DrawRectangle : MonoBehaviour 
{
    public Color FillColor = Color.white;
	
    private MeshFilter _meshFilter;
    private LineRenderer _lineRenderer;

    // Start and end vertices (in absolute coordinates)
    private readonly List<Vector2> _vertices = new List<Vector2>(2);
    

Hyperparticle

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()

Hyperparticle

public class TestPolygon : MonoBehaviour
{
    private void Start () {
        // Create Vector2 vertices
        var vertices2D = new Vector2[] {
            new Vector2(0,0),
            new Vector2(0,1),
            new Vector2(1,1),
            new Vector2(1,2),
            new Vector2(0,2),