Shape dimensions

New Annotations:

I added three new annotations, Sphere, Cuboid and OBBDimensions to store the output of the ClusterShapeAnnotator and the SizeAnnotator. I didn't include dimensions for a box in the Cuboid annotation, since the SizeAnnotator works model independent and doesn't consider outputs from the ClusterShape.

Feel free to suggest changes.

robokudo/src/robokudo/types/annotation.py

 import robokudo.types.core
 import robokudo.types.tf
-
+import numpy as np
 
 class Classification(robokudo.types.core.Annotation):
     def __init__(self):
@@ -26,28 +26,24 @@ class Plane(robokudo.types.core.Annotation):
         self.inliers = []  # List of pointcloud indices
 
 
-class Cuboid(robokudo.types.core.Type):
+class Shape(robokudo.types.core.Annotation):
     def __init__(self):
-        super().__init__()
-        self.model = [] # Has shape (3,4) - 3 plane equations
-        self.inliers = []  # List of pointcloud indices
+        super().__init__()    
+        self.inliers = [] # List of pointcloud indices
+        self.type = '' # Can be Cuboid, Sphere, etc.
 
 
-class Sphere(robokudo.types.core.Type):
+class Cuboid(Shape):
     def __init__(self):
         super().__init__()
-        self.radius = 0.0 # Radius of sphere shape
-        self.center = np.zeros(3)  # ndarray with shape (3,) represents a single coordinate
-        self.inliers = []  # List of pointcloud indices        
+        self.model = [] # Has shape (3,4) - 3 plane equations
 
 
-# Store dimensions of oriented bounding box
-class OBBDimensions(robokudo.types.core.Type):
+class Sphere(Shape):
     def __init__(self):
         super().__init__()
-        self.width = 0.0
-        self.height = 0.0
-        self.depth = 0.0
+        self.radius = 0.0 # Radius of sphere shape
+        self.center = np.zeros(3)  # ndarray with shape (3,) represents a single coordinate   
 
 
 # Usually a 2D histogram containing hue and saturation