One of the most commonly used file formats in manufacturing industry is .STL. We developed a semi-automated C++ -based preprocessor with command line interface and an OpenGL-based visual module to extract topological features from simplified 3D volumes presented .STL format. The evaluates input models five major steps: (i) edge identification, (ii) 2D regional grouping, (iii) region characteriz...

In this paper a non-traditional approach to generation of orthogonal/Cartesian grids with local refinement tetra-hedrons near STL boundary on the basis of up-to-date CAD systems is considered. The features of the algorithm of constructing orthogonal grids are explained. Examples of constructed grids are presented.

We identify a type of distributed system where the notion of space in planning is important. We give a formal modeling of the distributed system where planning is done. We show that several interesting planning goals in the model can be specified in a spatio-temporal logic STL. We develop an efficient planning procedure for these goals in the distributed setting.

The aim of the paper is to present computer software which analyse a geometric design of product and determine which part of product will be done with CNC milling and which part will be done with additive technology. Subsequently it split the CAD model of product on two or more part and save part for CNC milling in format which is used for making CNC code and save part for additive manufacturin...

This research presents a working methodology for developing an automatic planning system of the scanning process of free-form surfaces. The surface has been modelled using a STL format, that permits the automatic recognizing of any type of surface. This work does only consider collision-free orientations that guarantee the visibility of the zone to scan and that are compatible with the constrai...

This paper describes how a link between Virtual Reality and Rapid Prototyping was established at Clemson to enhance the designer’s understanding of manufacturing issues. It surveys the literature in the area of virtual reality and discusses some of the issues of translating an STL model into the appropriate format for Virtual Reality. The paper then speculates on the usefulness of such a tool f...

Automatic recognition of features from CAD models is one of the key technologies for mesh generation. This paper studies the algorithm for automatic recognition of features from CAD models in STL data format. Firstly, a new STL data file with topological connection is constructed for the calculation. Secondly, the coplanar relationships among all the triangle facets are constructed initially. T...

Background: This study describes the possibility of implementing three-dimensional printing technology to create a precise construction of a planned bolus, based on computed tomography information stored in the Digital Imaging and Communications in Medicine (DICOM) format file. Materials and Methods:  To create the bolus with a 3D printer, we converted data in the DICOM format to the s...

We describe a new algorithm for the parametric identification problem for signal temporal logic (STL), stated as follows: Given a densetime real-valued signalw and a parameterized temporal logic formula φ, compute the subset of the parameter space that renders the formula satisfied by the signal. Unlike previous solutions, which were based on search in the parameter space or quantifier eliminat...

The purpose of this investigation was to analyze the accuracy of digitally fabricated wax trial dentures and conventionally finalized complete dentures in comparison to a surface tessellation language (STL)-dataset. A generated data set for the denture bases and the tooth sockets was used, converted into STL-format, and saved as reference. Five mandibular and 5 maxillary denture bases were mill...