add basis for aabb and obb calculation of all data structures

Author: tomvanmele

src/compas/datastructures/datastructure.py

@@ -18,6 +18,40 @@ class Datastructure(Data):
     def __init__(self, attributes=None, name=None):
         super(Datastructure, self).__init__(name=name)
         self.attributes = attributes or {}
+        self._aabb = None
+        self._obb = None
+
+    @property
+    def aabb(self):
+        if self._aabb is None:
+            self._aabb = self.compute_aabb()
+        return self._aabb
+
+    @property
+    def obb(self):
+        if self._obb is None:
+            self._obb = self.compute_obb()
+        return self._obb
+
+    def compute_aabb(self):
+        """Compute the axis-aligned bounding box of the datastructure.
+
+        Returns
+        -------
+        :class:`compas.geometry.Box`
+
+        """
+        raise NotImplementedError
+
+    def compute_obb(self):
+        """Compute the oriented bounding box of the datastructure.
+
+        Returns
+        -------
+        :class:`compas.geometry.Box`
+
+        """
+        raise NotImplementedError
 
     def transform(self, transformation):
         """Transforms the data structure.

src/compas/geometry/geometry.py

@@ -39,6 +39,26 @@ def obb(self):
             self._obb = self.compute_obb()
         return self._obb
 
+    def compute_aabb(self):
+        """Compute the axis-aligned bounding box of the geometry.
+
+        Returns
+        -------
+        :class:`compas.geometry.Box`
+
+        """
+        raise NotImplementedError
+
+    def compute_obb(self):
+        """Compute the oriented bounding box of the geometry.
+
+        Returns
+        -------
+        :class:`compas.geometry.Box`
+
+        """
+        raise NotImplementedError
+
     def transform(self, transformation):
         """Transform the geometry.
 
@@ -274,23 +294,3 @@ def rotated(self, angle, axis=None, point=None):  # type: (...) -> G
             axis = [0.0, 0.0, 1.0]
 
         return self.transformed(Rotation.from_axis_and_angle(axis, angle, point))
-
-    def compute_aabb(self):
-        """Compute the axis-aligned bounding box of the geometry.
-
-        Returns
-        -------
-        :class:`compas.geometry.Box`
-
-        """
-        raise NotImplementedError
-
-    def compute_obb(self):
-        """Compute the oriented bounding box of the geometry.
-
-        Returns
-        -------
-        :class:`compas.geometry.Box`
-
-        """
-        raise NotImplementedError