/[escript]/trunk/pyvisi/py_src/datacollector.py
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revision 943 by jongui, Mon Jan 29 07:22:43 2007 UTC revision 947 by jongui, Wed Jan 31 07:17:43 2007 UTC
# Line 7  from constant import Source Line 7  from constant import Source
7    
8  class DataCollector:  class DataCollector:
9      """      """
10      Class that defines a data collector which deal with the source      Class that defines a data collector which dealrs with the source
11      of the data for visualisation.      of data for the visualisation.
12      """      """
13    
14      def __init__(self, source = Source.XML):      def __init__(self, source = Source.XML):
# Line 16  class DataCollector: Line 16  class DataCollector:
16          Initialise the data collector.          Initialise the data collector.
17    
18          @type source: L{Source <constant.Source>} constant          @type source: L{Source <constant.Source>} constant
19          @param source: Source input type          @param source: Source data type
20          """          """
21    
22          if(source == Source.XML): # Source is an XML file.          if(source == Source.XML): # Source is an XML file.
# Line 24  class DataCollector: Line 24  class DataCollector:
24    
25      def setFileName(self, file_name):      def setFileName(self, file_name):
26          """          """
27          Set the source file name to read for the data collector.          Set the source file name to read.
28    
29          @type file_name: String          @type file_name: String
30          @param file_name: Name of the file to read          @param file_name: Name of the file to read
# Line 32  class DataCollector: Line 32  class DataCollector:
32    
33          self.__vtk_xml_reader.SetFileName(file_name)          self.__vtk_xml_reader.SetFileName(file_name)
34          self.__output = self.__vtk_xml_reader.GetOutput()          self.__output = self.__vtk_xml_reader.GetOutput()
35    
36          # NOTE: Update must be called after SetFileName to make the reader          # NOTE: Update must be called after SetFileName to make the reader
37          # up to date. Otherwise, some output values may be incorrect.          # up to date. Otherwise, some output values may be incorrect.
38          self.__vtk_xml_reader.Update()          self.__vtk_xml_reader.Update()
39    
40      def _setActiveScalar(self, scalar):      def _setActiveScalar(self, scalar):
41          """          """
42          Specify the scalar field to laod from the source          Specify the scalar field to load from the source file.
         file for the data collector.  
43    
44          @type scalar: String          @type scalar: String
45          @param scalar: Scalar field to load from the file.          @param scalar: Scalar field to load from the file.
# Line 49  class DataCollector: Line 49  class DataCollector:
49    
50      def _setActiveVector(self, vector):      def _setActiveVector(self, vector):
51          """          """
52          Specify the vector field to laod from the source          Specify the vector field to load from the source file.
         file for the data collector.  
53    
54          @type vector: String          @type vector: String
55          @param vector: Vector field to load from the file.          @param vector: Vector field to load from the file.
# Line 60  class DataCollector: Line 59  class DataCollector:
59    
60      def _setActiveTensor(self, tensor):      def _setActiveTensor(self, tensor):
61          """          """
62          Specify the tensor field to laod from the source          Specify the tensor field to load from the source file.
         file for the data collector.  
63    
64          @type tensor: String          @type tensor: String
65          @param tensor: Tensor field to load from the file.          @param tensor: Tensor field to load from the file.
# Line 87  class DataCollector: Line 85  class DataCollector:
85          @return: Vector range          @return: Vector range
86          """          """
87    
88          vector_range =  self._getOutput().GetPointData().GetVectors().GetRange(-1)          vector_range = self._getOutput().GetPoitData().GetVectors().GetRange(-1)
89    
90          # NOTE: Generally GetRange(-1) returns the correct vector range.          # NOTE: Generally GetRange(-1) returns the correct vector range.
91          # However, there are certain data sets where GetRange(-1) seems          # However, there are certain data sets where GetRange(-1) seems
# Line 117  class DataCollector: Line 115  class DataCollector:
115          return self.__output          return self.__output
116    
117            
118    ###############################################################################
119    
120    
121  from constant import ImageFormat  from constant import ImageFormat
122    
123  class ImageReader:  class ImageReader:
# Line 137  class ImageReader: Line 138  class ImageReader:
138    
139      def getImageReader(self):      def getImageReader(self):
140          """          """
141          Return the corresponding image reader based on the supplied image          Return the appropriate image reader based on the supplied image
142          format.          format.
143    
144          @rtype: vtkImageReader2 (i.e. vtkJPEGReader, etc)          @rtype: vtkImageReader2 (i.e. vtkJPEGReader, etc)
# Line 160  class ImageReader: Line 161  class ImageReader:
161          Set the image file name.          Set the image file name.
162    
163          @type file_name: String          @type file_name: String
164          @param file_name: Image file name which is to be read          @param file_name: Image file name to be read
165          """          """
166    
167          self.__vtk_image_reader.SetFileName(file_name)          self.__vtk_image_reader.SetFileName(file_name)
168    
169      def _getOutput(self):      def _getOutput(self):
170          """          """
171          Return the image reader.          Return the output of the image reader.
172    
173          @rtype: vtkImageData          @rtype: vtkImageData
174          @return Image data          @return Image data
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