pyvisi/py_src/normals.py

"""
@author: John NGUI
"""

import vtk

class Normals:
    """
    Class that defines normals. Normals are used to average the normals of 
    points in order to generate better sufaces (in the case of tensors, normals
    avoids the tensors from appearing black in color).
    """

    def __init__(self):
        """
        Initialise the normals.
        """

        self.__vtk_poly_data_normals = vtk.vtkPolyDataNormals()

    def _setupNormals(self, object):
        """
        Setup the normals.

        @type object: vtkPolyData, etc
        @param object: Input for the normals
        """

        self.__object = object
        self.__setInput()

    def __setInput(self):
        """
        Set the input for the normals.
        """

        self.__vtk_poly_data_normals.SetInput(self.__object)

    def _getNormalsOutput(self):
        """
        Return the output of the normals.

        @rtype: vtkPolyData
        @return: Polygonal data
        """

        return self.__vtk_poly_data_normals.GetOutput()
1	"""
2	@author: John NGUI
3	"""
4
5	import vtk
6
7	class Normals:
8	"""
9	Class that defines normals. Normals are used to average the normals of
10	points in order to generate better sufaces (in the case of tensors, normals
11	avoids the tensors from appearing black in color).
12	"""
13
14	def __init__(self):
15	"""
16	Initialise the normals.
17	"""
18
19	self.__vtk_poly_data_normals = vtk.vtkPolyDataNormals()
20
21	def _setupNormals(self, object):
22	"""
23	Setup the normals.
24
25	@type object: vtkPolyData, etc
26	@param object: Input for the normals
27	"""
28
29	self.__object = object
30	self.__setInput()
31
32	def __setInput(self):
33	"""
34	Set the input for the normals.
35	"""
36
37	self.__vtk_poly_data_normals.SetInput(self.__object)
38
39	def _getNormalsOutput(self):
40	"""
41	Return the output of the normals.
42
43	@rtype: vtkPolyData
44	@return: Polygonal data
45	"""
46
47	return self.__vtk_poly_data_normals.GetOutput()