Current version is LGS 3D 1.4

The new 1.4 release is much more rapid than previous versions of LGS 3D. Due to efficient optimization of the core computational techniques, user functions were executed faster, measured on a large industrial test base of more than three thousand cases.

• The main advantage of the new 1.4 release is performance of the Move Under Constraint functionality, which is accelerated up to 7 times due to the new heuristics implementation.
• New LGS 3D API functions that enable storing and restoring LGS 3D context to/from a file or a binary data array are provided. API functions for tolerance management are introduced also.
• The Lege'n'd 3D demo application is moved to OpenCASCADE 6.2 version and can now export models to IGES/STEP formats.
• The new set of Samples of parameterized mechanisms is added to the demo installation set to simplify LGS 3D evaluation.
• All these advantages coupled with affordable pricing make LGS 3D the best deal for CAD/CAM/CAE parameterization.

See below animated example that demonstrates progress in LGS 3D Move Under Constraint functionality.

For the full list of changes see Release Status page.

About LGS 3D

LGS 3D geometric solver is a computational software module that supports parametric design functionality in CAD systems. In addition, geometric modeling and virtual reality systems, as well as other applications that require logical and parametric connections or constraints to be managed between geometric objects in a three-dimensional environment, may also benefit from integration with LGS 3D.

Currently, many modern CAD systems offer assembly design modules. In today's ascending assembly design process, it is impossible to work without using assembly constraints such as coincidence and coaxiality. These constraints dictate the relative positioning of each part within the design model. By manipulating with parametric constraints and moving parts while satisfying all design constraints, designers can evaluate kinematics of the model at the early stages of the project.

Recent trends in three-dimensional drawing systems have increasingly tended towards dissemination. As a result, three-dimensional models are obtained not from two-dimensional sketches, but directly from the three-dimensional primitives in a process resembling the way ordinary two-dimensional vector models are constructed. These systems typically require levels of parametric functionality equal to two-dimensional drawing systems. However, the ability to set parametric constraints eliminates the need for exact drawing by designers because the constraints have the ability to render a sketch into an exact design. Other benefits of this functionality include simplification of process of model modification and the ability to carry out a simple kinematical analysis of the model.