OCC: Open Cascade Connexion
Version: 2.8 (12/2018)
Author: Onera
Preamble
This module provides routines to use Open CASCADE capabilities within
Cassiopee.
The current available function is for importing IGES files. Only CAD surfaces will be imported: other entities are ignored.
This module manipulates both supported data structures, arrays, and pyTrees (see Converter Module).
In this documentation, we note a or b an array,
and A or B a list of arrays.
To use the array interface:
import OCC as O
To use the pyTree interface:
import OCC.PyTree as O
File / arrays or File / pyTree conversion
C.convertIGESArrays:
read an IGES file and return a list of arrays:
A = C.convertIGESArrays(fileName, h=0., chordal_err=0., growth_ratio=0.)
The file extension must be one of the regular extensions : .igs, .iges, .IGS or .IGES. Both ASCII and binary format are handled.
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Option name
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Meaning
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Default value
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h
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Specified absolute size of the mesh edges.
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0. The algorithm will compute an appropriate value (one tenth of the edges length average over the model).
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chordal_err
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Specified chordal error.
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0. The algorithm uses in this case 2% of h value.
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growth_ratio
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Specified growth_ratio.
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0: constant mesh size, if > 1., specifies the growing ratio of mesh size from boundary to interior.
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C.convertIGES2PyTree:
read a file to a pyTree:
A = C.convertIGES2PyTree('in.iges')
Example of use: import an IGES file into a tree.
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