void UpdateReadFingerCreatePoints()
{
Vector2 fingerPos = Input.mousePosition;
// NOTE: this works because we're using an orthographic camera.
// Per Unity's camera setup, orthoSize is half the screen height.
// If you are using a perspective camera, cast a ray into the scene
// to where your zero plane is and get the position that way.
fingerPos -= ScreenCenter;
worldFingerPosition = (fingerPos * CameraOrthoSize) / (Screen.height / 2);
worldFingerPosition += CameraCenterAxis;
if (Input.GetMouseButtonDown(0))
{
fingerDown = true;
lastWorldPosition = worldFingerPosition;
Points = new List <Vector2>();
Points.Add(worldFingerPosition);
}
if (fingerDown)
{
if (Input.GetMouseButton(0))
{
float distance = Vector2.Distance(fingerPos, lastWorldPosition);
if (distance > MinDistanceToConsiderAnEdge)
{
Points.Add(worldFingerPosition);
lastWorldPosition = fingerPos;
}
}
else
{
if (Input.GetMouseButtonUp(0))
{
if (Points.Count > 2)
{
Points.Add(worldFingerPosition);
var go = MakeCollider2D.Create(Points.ToArray(), DoubleSided: true);
go.GetComponent <Renderer>().material = mtlPolygon;
go.AddComponent <Rigidbody2D>();
}
fingerDown = false;
Points = null;
}
}
}
}
void Start()
{
Vector2[] v1 = new Vector2[] {
new Vector2(-1, 0),
new Vector2(0, 1),
new Vector2(2, 0),
new Vector2(0, -1),
};
var go = MakeCollider2D.Create(v1);
go.GetComponent <Renderer>().material = mtl1;
go.AddComponent <Rigidbody2D>();
}