Biomedical Engineering Reference
In-Depth Information
Fig. 7.6
Rough and smooth polygonal meshes of the cervical vertebra
Fig. 7.7
Patched surfaces and loss of geometrical fidelity while constructing the object
In order to perform this transformation in Geomagic Studio environment, the
following steps have to be accomplished:
•
Computing the contour lines
•
Extending the tangent lines
•
Filling all the existent gaps in the mesh
•
Computing the grid
•
Repairing the grid intersections if needed
•
Constructing the NURBS surfaces [
21,
45
]
The surface generation phase ends by exporting the models as IGES format files.
7.2.4
Solid Generation
The IGES format files were imported into SolidWorks environment for further process-
ing. IGES is a standard CAD format for solid objects, designed to work with the major-
ity of CAD environments. This was the reason why this format type was chosen.
When diagnostic tool runs in SolidWorks, some of the surfaces are detected as
faulty or gaps. A faulty surface is sometimes generated by self-intersecting patches.
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