IEEE

Using topic maps to describe engineering knowledge and geometry of CAD-designed products

Abstract: In the early development phase, it is necessary to design products as realistically as possible and to clarify whether the basic requirements can be fulfilled or not. In this phase, the ...
IEEE

Enhanced techniques in accessing 2D CAD geometry for 3D generation

Abstract: One of the major issues of 3D generation for MEMS components today is access to 2D CAD geometry in an accurate and efficient manner. This paper provides some solution to the problems of the ...
Machine Design

No CAD geometry? No problem for parametric FEA

A parametric FEA program now lets engineers manipulate shapes and positions of features in meshed models without accessing the original CAD model or CAD software To stretch the rear end of the SUV, ...
TypePad

Navisworks just displays basic geometry of custom entity

I created an ObjectDBX for a custom circle, which is derived from AcDbCircle. I have a DWG which contains my custom circle. When I opened this DWG in Navisworks, it only displays the base geometry, ...
TypePad

Get entity geometry using custom WorldDraw and ViewportDraw

When AutoCAD draws an entity, it is passing an implementation of WorldDraw and ViewportDraw classes to the entity which then can call the functions of those classes to draw itself. First WorldDraw is ...