LEDAS Ships LGS 3D v3 for Variational Direct Modeling Developers

LGS 3D v.3.0 takes a major step towards full-scale variational direct modeling – technology that creates design intent by combining the simplicity of history-free geometric editing with the power of constraints

Novosibirsk, Russia – LEDAS Ltd., the independent provider of end-user variational design tools, technology components, and software development services for the CAD/CAM/CAE/PDM market, today announced the availability of version 3.0 of its LGS 3D geometric constraint solver. This core technology component of parametric modeling allows assembly design, motion simulation, and history-free geometric editing. LGS 3D permits users to express their design intent through a combination of geometric constraints and driving dimensions.

Version 3.0 contains many improvements in stability and performance; as well, it implements new features requested by developers of history-free 3D geometry editing applications.

Varational Direct Modeling based on LGS 3D v3

“We developed LGS 3D v.3.0 in close cooperation with our customers,” explains Dmitry Ushakov, Director of Product Management, LEDAS Ltd. ”We detected significant interest from many CAD, CAM and CAE vendors in our variational direct modeling technology, and we plan to extend its scope with several successive versions of LGS 3D to be released this year and next.”
New Features in LGS 3D

Version 3.0’s primary new feature is its ability to adjust the radii of circles, cylinders, and spheres automatically to satisfy constraints. This function allows users to modify fillets, blends, and round holes in their models parametrically. By default, the radii are fixed so that existing assembly design and kinematic simulation applications implemented with previous versions of LGS 3D continue to work as expected.

Version 3.0 also contains significant improvements for the support of periodic curves and surfaces, improvements that were based on testing by customers and their dynamic scenarios.

The algorithms that handle over-defined constraint diagnostics and move-under constraints have been tuned using feedback from customers. The behavior of LGS 3D in solving planar angles is now more natural.

Additional improvements to LGS 3D 3.0 include extended API error diagnostics, corrected journaling mechanisms, and bug fixes.

Version 3.0 of LGS 3D is already embedded in several commercial applications, including a recent release of the RhinoDirect plug-in for McNeel & Associates’ Rhinoceros 3D modeling software. RhinoDirect, as a part of the Driving Dimensions product line, aims at making advanced mechanical CAD technology available to all users of popular 3D software at an affordable price.