/[escript]/trunk/pyvisi/py_src/contourmodule.py
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revision 1147 by ksteube, Wed May 16 06:39:11 2007 UTC revision 1148 by jongui, Wed May 16 22:45:33 2007 UTC
# Line 9  class ContourModule: Line 9  class ContourModule:
9      Class that defines contour module.      Class that defines contour module.
10      """      """
11    
12      def __init__(self, object):      def __init__(self):
13          """          """
14          Initliase the contour module.          Initliase the contour module.
15            """
16    
17            self.__vtk_contour = vtk.vtkContourFilter()
18            # Keeps track whether the number of contours and its range have
19            # been specified.
20            self.__contours = None
21            self.__lower_range = None
22            self.__upper_range = None
23    
24        def _setupContourModule(self, object):
25            """
26            Setup the contour module.
27    
28          @type object: vtkUnstructuredGrid, etc          @type object: vtkUnstructuredGrid, etc
29          @param object: Input for the contour          @param object: Input for the contour
30          """          """
31    
32          self.__object = object          self.__object = object
         self.__vtk_contour = vtk.vtkContourFilter()  
   
33          self.__setInput()          self.__setInput()
34    
35      def __setInput(self):      def __setInput(self):
# Line 29  class ContourModule: Line 39  class ContourModule:
39    
40          self.__vtk_contour.SetInput(self.__object)          self.__vtk_contour.SetInput(self.__object)
41    
42        # This method is used to delay the execution of generating the contours.
43    
44      # lower_range and upper_range by default is assigned to None. This allows      # lower_range and upper_range by default is assigned to None. This allows
45      # the contours to be altered without necessarily having to alter the      # the contours to be altered without necessarily having to alter the
46      # lower_range and upper_range at the same time.      # lower_range and upper_range at the same time.
47      def generateContours(self, contours, lower_range = None,      def generateContours(self, contours = None, lower_range = None,
48              upper_range = None):              upper_range = None):
49          """          """
50          Generate the specified number of contours within the specified range.          Set the number of contours to generate and its range.  
         In order to generate an iso surface, the 'lower_range' and  
         'upper_range' must be equal.  
51    
52          @type contours: Number          @type contours: Number
53          @param contours: Number of contours to generate          @param contours: Number of contours to generate
# Line 46  class ContourModule: Line 56  class ContourModule:
56          @type upper_range: Number          @type upper_range: Number
57          @param upper_range: Upper range of contours values          @param upper_range: Upper range of contours values
58          """          """
59        
60            if(contours != None): # True if the contours is specified.
61                self.__contours = contours
62          if(lower_range != None): # True if the lower_range is specified.          if(lower_range != None): # True if the lower_range is specified.
63              self.__lower_range = lower_range              self.__lower_range = lower_range
64          if(upper_range != None): # True if the upper_range is specified.          if(upper_range != None): # True if the upper_range is specified.
65              self.__upper_range = upper_range              self.__upper_range = upper_range
66    
67          self.__vtk_contour.GenerateValues(contours, self.__lower_range,      def _generateContours(self):
68            """
69            Generate the specified number of contours within the specified range.
70            In order to generate an iso surface, the 'lower_range' and
71            'upper_range' must be equal.
72            """
73    
74            self.__vtk_contour.GenerateValues(self.__contours, self.__lower_range,
75                  self.__upper_range)                  self.__upper_range)
76    
77      def _getContour(self):      def _getContour(self):
# Line 65  class ContourModule: Line 84  class ContourModule:
84    
85          return self.__vtk_contour          return self.__vtk_contour
86    
87      def _getOutput(self):      def _getContourModuleOutput(self):
88          """          """
89          Return the output of the contour.          Return the output of the contour.
90    
# Line 75  class ContourModule: Line 94  class ContourModule:
94    
95          return self.__vtk_contour.GetOutput()          return self.__vtk_contour.GetOutput()
96    
97        def _isContoursSet(self):
98            """
99            Return whether the number of contours have been specified.
100    
101            @rtype: Boolean
102            @return: True or False
103            """
104    
105            if(self.__contours != None):
106                return True
107            else:
108                return False
109    
110        def _isLowerRangeSet(self):
111            """
112            Return whether the lower range has been specified.
113    
114            @rtype: Boolean
115            @return: True or False
116            """
117    
118            if(self.__lower_range != None):
119                return True
120            else:
121                return False
122    
123        def _isUpperRangeSet(self):
124            """
125            Return whether the upper range has been specified.
126    
127            @rtype: Boolean
128            @return: True or False
129            """
130    
131            if(self.__upper_range != None):
132                return True
133            else:
134                return False

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