public static void Draw(this TR tr, float size)
{
Handles.matrix = tr.TRS(size);
// Handles.CubeHandleCap(0, Vector3.zero, Quaternion.identity, size, EventType.Repaint);
Handles.color = Color.red;
Handles.DrawLine(Vector3.zero, Vector3.right);
Handles.color = Color.green;
Handles.DrawLine(Vector3.zero, Vector3.up);
Handles.color = Color.blue;
Handles.DrawLine(Vector3.zero, Vector3.forward);
Handles.color = Color.white;
// xy
Handles.DrawLine(Vector3.right + Vector3.up, Vector3.right);
Handles.DrawLine(Vector3.right + Vector3.up, Vector3.up);
// yz
Handles.DrawLine(Vector3.up + Vector3.forward, Vector3.forward);
Handles.DrawLine(Vector3.up + Vector3.forward, Vector3.up);
// zx
Handles.DrawLine(Vector3.forward + Vector3.right, Vector3.forward);
Handles.DrawLine(Vector3.forward + Vector3.right, Vector3.right);
}
