Geometry Module
===============

The geometry module is used to obtain information about the points and vertices of a ployhedra.

.. py:class:: Points

This class represents points in space.

    .. py:method:: isorigin(self)
    
        Return ``True`` if a point is the origin.
        
    .. py:method:: __eq__(self, other)
    
        Compare two Points for equality.
        
    .. py:method:: __add__(self, other)
    
        Add a Point to a Vector and return the result as a Point.
        
    .. py:method:: __sub__(self, other)
    
        Return the difference between two Points as a Vector.
        
    .. py:method:: aspolyhedon(self)
    
        Return a Point as a polyhedron corresponding to the Point, assuming the Point has integer coordinates.
    
    
.. py:class:: Vector

This class represents displacements in space. 

    .. py:method:: __eq__(self, other)
    
        Compare two Vectors for equality.
        
    .. py:method:: __add__(self, other)
    
        Add either a Point or Vector to a Vector. The resulting sum is returned as the same structure *other* is.    
        
    .. py:method:: __sub__(self, other)
    
        Subtract a Point or Vector from a Vector. The resulting difference is returned in the same form as *other*.
                    
    .. py:method:: __mul__(self, other)
        
        Multiply a Vector by a scalar value and returns the result as a Vector. 
    
    .. py:method:: __neg__(self)
    
        Negate a Vector.
        
    .. py:method:: norm(self)
    
        Normalizes a Vector.    
                
    .. py:method:: isnull(self)
    
        Tests whether a Vector is null.
       
    .. py:method:: angle(self, other)
    
        Retrieve the angle required to rotate the vector into the vector passed in argument. The result is an angle in radians, ranging between -pi and
        pi.

    .. py:method:: cross(self, other)
    
        Calculate the cross product of two Vector3D structures. If the vectors are not tridimensional, a _____ error is raised.

    .. py:method:: dot(self, other)
    
        Calculate the dot product of two vectors. 
        
    .. py:method:: __trudiv__(self, other)
    
       Divide the vector by the specified scalar and returns the result as a vector.