Gismoz Draw text

static public void drawString(string text, Vector3 worldPos, Color? colour = null) {
            UnityEditor.Handles.BeginGUI();

            var restoreColor = GUI.color;

            if (colour.HasValue) GUI.color = colour.Value;
            var view = UnityEditor.SceneView.currentDrawingSceneView;
            Vector3 screenPos = view.camera.WorldToScreenPoint(worldPos);

            if (screenPos.y < 0 || screenPos.y > Screen.height || screenPos.x < 0 || screenPos.x > Screen.width || screenPos.z < 0)
            {
                GUI.color = restoreColor;
                UnityEditor.Handles.EndGUI();
                return;
            }

            Vector2 size = GUI.skin.label.CalcSize(new GUIContent(text));
            GUI.Label(new Rect(screenPos.x - (size.x / 2), -screenPos.y + view.position.height + 4, size.x, size.y), text);
            GUI.color = restoreColor;
            UnityEditor.Handles.EndGUI();
        }