add bounding box etc.

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Added `list` to accepted types for `Scene.add`.
 * Added `list[float]` to accepted types for `Camera.position` and `Camera.target`.
+* Added `bounding_box` and `_update_bounding_box` to `BufferObject`.
 
 ### Changed
 

src/compas_viewer/scene/bufferobject.py

@@ -211,18 +211,30 @@ def __init__(
         self.is_selected = False
         self.background = False
         self._matrix_buffer = None
+        self._bounding_box = None
         self._bounding_box_center = None
 
     @property
     def buffergeometry(self) -> BufferGeometry:
         return self.item
 
+    @property
+    def bounding_box(self) -> NDArray:
+        if self._bounding_box is None:
+            self._bounding_box = np.array([np.min(self.buffergeometry.points, axis=0), np.max(self.buffergeometry.points, axis=0)])
+        return self._bounding_box
+
     @property
     def bounding_box_center(self) -> NDArray:
         if self._bounding_box_center is None:
             self._bounding_box_center = np.mean(self.buffergeometry.points.reshape(-1, 3), axis=0)
         return self._bounding_box_center
 
+    def _update_bounding_box(self):
+        self._bounding_box = None
+        self._bounding_box_center = None
+        # Set to None so that they are recalculated next time they are accessed
+
     def init(self):
         """Initialize the object"""
         self.instance_color = Color.from_rgb255(*next(self.scene._instance_colors_generator))