Analysis and repair of STL files

STL is the primary format used for the transfer of a model from a 3D CAD system to a rapid prototyping machine. A rapid prototyping machine uses the model definition contained within the STL file to produce a physical model. Although most 3D CAD systems can export STL files, many produce STL files containing errors. There are a number of common problems with STL files that can cause undesired flaws in the resulting part if the file isn't repaired first. This thesis presents a computer program that can verify and, if necessary, repair many common errors. The program can also perform a number of utility operations such as scaling, translation, calculation of volume, and conversion from the STL format to a number of other formats. A description of the algorithms used and the source code for the program is also included.