docs: def isPointInside(self, xp, yp):
          """Is the given point inside the polygon?
  
          Input:
          ------------
          xp, yp
              (floats) Coordinates of point in same units that
              array vertices are specified when object created.
          Returns:
          -----------
          **True** / **False**
          """
  
          point = np.array([xp, yp]).transpose()
          polygon = self.polygon
          numVert, numDim = polygon.shape
  
          #Subtract each point from the previous one.
          polyVec = np.roll(polygon, -1, 0) - polygon
          #Get the vector from each vertex to the given point
          pointVec = point - polygon
  
          crossProduct = np.cross(polyVec, pointVec)
  
          if np.all(crossProduct < 0) or np.all(crossProduct > 0):
              return True
          return False