At an early stage of design, models created by Computer Aided Design (CAD) applications are not sent as-is for analysis in Computer Aided Engineering (CAE) applications, especially the non-trivial models. Analysis engineers use their domain expertise to simplify these models so that analysis gets performed with lesser resources without compromising much on accuracy of the results. Such Model Si...

Using CAD data for analysis is becoming more common, but is still fraught with dirty geometry problems such as slivers, cross-overs, minute edge lengths, stray points ‘on the moon’, wonderful clean-asa-whistle models that are useless for meshing, patchworks of faces that attract unnecessary elements, birdsnests of draughting geometry stuck in a corner, etc. Even if binary, native CAD files are ...

ed models for conceptual design, mixed dimensional shapes for intermediate design steps, solid models for final design, mesh models on abstracted part shape for engineering analysis @3,4#, offset polyhedral models for tool path generation, and so on. • Boolean operations are closed in the representation domain of non-manifold models, unlike solid models @5–7#. The resultant shape of Boolean ope...

Interval arithmetic has been considered as a step forward to counter numerical robustness problem in geometric and solid modeling. The interval arithmetic boundary representation (Brep) scheme was developed to tackle this problem. In constructing an interval B-rep solid, robust and efficient computation of intersections between the bounding surfaces of the solid is a critical issue. To address ...

Radiation dose calculation using models of the human anatomy has been a subject of great interest to radiation protection, medical imaging, and radiotherapy. However, early pioneers of this field did not foresee the exponential growth of research activity as observed today. This review article walks the reader through the history of the research and development in this field of study which star...

We present e cient and accurate algorithms for Boolean combinations of solids composed of sculptured models. The surface of each solid is represented as a collection of trimmed and untrimmed spline surfaces and a connectivity graph. Based on algorithms for trapezoidation of polygons, partitioning of polygons using polygonal chains, surface intersection of high degree spline surfaces and ray-sho...

To show intelligent behavior in a First Person Shooter (FPS) game an Artificial Intelligence (AI) controlled character needs spatial and temporal awareness of the environment. Real-time environment sampling to acquire this awareness during game-play is particularly expensive in today's high detail games. Furthermore, on single CPU/core systems, that are still very common in the PC gaming landsc...

s for Trends in Unstructured Mesh Generation 1 Application of smoothing techniques for aligning meshes José M. Escobar University of Las Palmas de Gran Canaria Parque Científico-Tecnológico de Tafira Las Palmas de Gran Canaria 35017 Spain [email protected] Rafael Montenegro University of Las Palmas de Gran Canaria Parque Científico-Tecnológico de Tafira Las Palmas de Gran Canaria LP 35017 S...