Described by Stereolithography Files

** Daniel Rypl, Zdenek Bittnar
Department of Structural Mechanics
Faculty of Civil Engineering
Czech Technical University in Prague
Thákurova 7, 166 29 Prague, Czech Republic**

The stereolithography (STL) file format, developed for rapid
prototyping industry, became an attractive alternative for
surface representation in solid modeling. However such
a representation is not appropriate for computational analysis using
the finite element method. The presented paper addresses
triangulation of 3D surfaces geometry of
which is represented by discrete data in the STL format. Initially,
a suitable topological representation is constructed from the STL file
using feature recognition based on appropriate topological and
geometrical operations. Then a smooth surface is recovered over the
original STL grid using an interpolating subdivision procedure. And
finally, the reconstructed surface is subjected to the triangulation
accomplished using the advancing front technique operating directly on
the surface. The capability of the proposed methodology
is illustrated on a few examples.

- Introduction
- STL File Format
- Extraction of Boundary Representation
- Reconstruction of Limit Surface
- Mesh Generation
- Examples
- Conclusions
- Acknowledgments
- Bibliography
- Figures

*Daniel Rypl
2005-11-05*