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Usage
vtkTecplotReader parses an ASCII Tecplot file to get a
vtkMultiBlockDataSet object made up of several vtkDataSet
objects, of which each is of type either vtkStructuredGrid
or vtkUnstructuredGrid. Each vtkDataSet object maintains the
geometry, topology, and some associated attributes
describing physical properties.
Tecplot treats 3D coordinates (only one or two coordinates
might be explicitly specified in a file) as varaibles too,
whose names (e.g., 'X' / 'x' / 'I', 'Y' / 'y' / 'J', 'Z' /
'z' / 'K') are provided in the variables list (the
'VARIABLES' section). These names are then followed in the
list by those of other traditional variables or attributes
(node- based and / or cell-based data with the mode
specified via token 'VAR LOCATION', to be extracted to
create vtkPointData and / or vtkCellData). Each zone
described afterwards (in the 'ZONE's section) provides the
specific values of the aforementioned variables (including
3D coordinates), in the same order as indicated by the
variable-names list, through either POINT-packing (i.e.,
tuple-based storage) or BLOCK-packing (component-based
storage). In particular, the first / description line of
each zone tells the type of all the constituent cells as the
connectivity / topology information. In other words, the
entire dataset is made up of multiple zones (blocks), of
which each maintains a set of cells of the same type
('BRICK', 'TRIANGLE', 'QUADRILATERAL', 'TETRAHEDRON', and
'POINT' in Tecplot terms). In addition, the description line
of each zone specifies the zone name, dimensionality
information (size of each dimension for a structured zone),
number of nodes, and number of cells. Information about the
file format is available at http://download.tecplot.com/360/
dataformat.pdf.
To create an instance of class vtkTecplotReader, simply
invoke its constructor as follows
obj = vtkTecplotReader
Methods
The class vtkTecplotReader has several methods that can be
used. They are listed below. Note that the documentation is
translated automatically from the VTK sources, and may not
be completely intelligible. When in doubt, consult the VTK
website. In the methods listed below, obj is an instance of
the vtkTecplotReader class.
* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkTecplotReader = obj.NewInstance ()
* vtkTecplotReader = obj.SafeDownCast (vtkObject o)
* int = obj.GetNumberOfVariables () - Get the number of all
variables (including 3D coordinates).
* obj.SetFileName (string fileName) - Specify a Tecplot
ASCII file for data loading.
* string = obj.GetDataTitle () - Get the Tecplot data title.
* int = obj.GetNumberOfBlocks () - Get the number of blocks
(i.e., zones in Tecplot terms).
* string = obj.GetBlockName (int blockIdx) - Get the name of
a block specified by a zero-based index. NULL is returned
for an invalid block index.
* int = obj.GetNumberOfDataAttributes () - Get the number of
standard data attributes (node-based and cell-based),
excluding 3D coordinates.
* string = obj.GetDataAttributeName (int attrIndx) - Get the
name of a zero-based data attribute (not 3D coordinates).
NULL is returned for an invalid attribute index.
* int = obj.IsDataAttributeCellBased (string attrName) - Get
the type (0 for node-based and 1 for cell-based) of a
specified data attribute (not 3D coordinates). -1 is
returned for an invalid attribute name.
* int = obj.IsDataAttributeCellBased (int attrIndx) - Get
the type (0 for node-based and 1 for cell-based) of a
specified data attribute (not 3D coordinates). -1 is
returned for an invalid attribute index.
* int = obj.GetNumberOfDataArrays () - Get the number of all
data attributes (point data and cell data).
* string = obj.GetDataArrayName (int arrayIdx) - Get the
name of a data array specified by the zero-based index
(arrayIdx).
* int = obj.GetDataArrayStatus (string arayName) - Get the
status of a specific data array (0: un-selected; 1:
selected).
* obj.SetDataArrayStatus (string arayName, int bChecked) -
Set the status of a specific data array (0: de-select; 1:
select) specified by the name.
* FreeMat_Documentation
* Visualization_Toolkit_IO_Classes
* Generated on Thu Jul 25 2013 17:18:34 for FreeMat by
doxygen_ 1.8.1.1
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