6 Apr 2011
LEDAS Adds Profile Management to LGS 2D Constraint Solver
Latest release of LGS 2D now parametrically controls bounded geometry
Novosibirsk, Russia: April 6, 2011 - LEDAS Ltd today announced version 6.0 of LGS 2D, its 2D geometric constraint solver. As the core technology of parametric software packages, LGS 2D allows users to express design intent in sketches and drawings through geometric, dimensional, and engineering constraints.
Previous versions of LGS 2D modeled only untrimmed geometric objects, such as points, infinite lines, and full circles. Version 6.0 adds the ability to deal with boundary geometries, like segments, circular arcs, and elliptic arcs. It also computes more natural solutions, as preferred by most CAD users.
New: Segments and Arcs as Edges
LGS 2D 6.0 implements segments and arcs as new types of entities. Jointly, they are known as edges. Edges can be interpreted as new kinds of geometric objects and as ternary constraints. (The latter means that each edge is created on top of three LGS2D objects -- a line, circle, or ellipse, and two points -- and then imposes two coincidence constraints between the first object and each point.)
In addition, the endpoints of edges keep their order during the constraint solving process. For segments, this means that the direction of lines is always oriented from the first to the second end point. (This direction can be reverted by modifying the edge’s alignment attribute.)
Each edge also has a length attribute, with values of free, fixed, or linked to a variable. Circular and elliptic arcs have the angle attribute with the same properties.
Through edges, any LGS-based application can provide users with full parametric control over their drawings, which is unreachable when the geometry is modeled with unbounded objects (i.e., lines, circles, ellipses) that are connected with two incident points. An example can be found in the video at http://ledas.com/EdgeConstraints.php.
Edges also represent a special case of dependent curves with three control objects. This means that they can be linked with other geometries using the appropriate constraints, such as incidence with a point, and tangency to a line. For example, when users set the incidence constraint between a point and a segment, then the point will always lie between the segment's endpoints. This is behavior that cannot be modeled with unbounded geometry.
Edges gain the advantage over user-defined curves in the area of improved performance. This is achieved from the application of analytical methods and decomposition techniques to solve the constraints.
Edges are implemented as a new add-on module for LGS 2D named LGSProfiles. Programmers can use edges in the same way as they do other LGS 2D objects. In the future, LEDAS plans to extend the LGSProfiles module with other bounded geometries, such as composite and offset curves.
The LGSProfiles module is licensed with LGS 2D at an additional price. Please contact email@example.com for details.
Other Improvements in LGS 2D
Version 6.0 produces more natural solutions for several constraint scenarios. The solver implemented two new techniques to minimize changes to the model, and to keep the sketch as close as possible to the initial drawing. These techniques work effectively for scenarios with one to three unsatisfied constraints, which are typical for interactive sketcher applications.
"Version 6.0 opens a new direction of the development for our 2D constraint solver," said Ivan Rykov, Director of R&D of Component Technologies at LEDAS, Ltd. "This was requested by our customers, whose satisfaction is the priority for our development direction."
About LGS Software
Since the first commercial release in 2004, LGS 2D and 3D software components have been licensed by a dozen CAD/CAM/CAE vendors, who have embedded them into their applications successfully.
The LGS 2D and 3D geometric constraint solvers are used as parametric engines for 2D sketching and drawing, direct 3D modeling, assembly design, motion analysis, and other applications. LGS 2D/3D are cross-platform software packages running on 32- and 64-bit versions of Windows, Linux, Mac OS X, *BSD, AIX, HP-UX, and other operating systems. LGS 2D and 3D have a C-style API for easy integration into a broad range of software applications using a variety of wrappers, such as .NET, Java, and C++.
LGS 2D and 3D support the creation and modification of geometric models by means of explicit and implicit constraints. Geometric objects that can be constrained include points, lines, circles, ellipses, planes, cylinders, spheres, NURBS, application-defined parametric curves, and surfaces. Objects can be fixed in the absolute coordinate system or relative to each other. Supported constraints include geometric relations between objects (coincidence, parallelism, tangency, and so on) and dimensions that specify the required values for distances, angles, and radii. LGS 2D and 3D move and rotate objects to positions that satisfy all constraints, yet minimize transformations from initial configurations.
Other LGS functions implement advanced features of CAD/CAM/CAE systems, such as diagnostics of over- and under-defined parts of models, engineering variables and equations, help points, and tolerance management.
Example applications Lege’n’d 2D/3D are available as free downloads from the LEDAS web site. This collection of sample models represents different kinds of 2D sketches and 3D assemblies that can be constructed from LGS. The associated applications can be used to test the functionality, robustness, and performance of LGS 2D/3D. The sample applications were all created with the Open CASCADE open-source application framework; the source code is available to all licensees.
All members of Open Design Alliance can easily integrate the LGS 2D geometric constraint solver with a Teigha for .dwg files client application, which provides easy access to constraint solving functions. A sample application demonstrating a number of constraint-related features can be found on the ODA web site.
To learn more about LGS 2D/3D, visit the LEDAS Web site at www.ledas.com/products/lgs2d.
LEDAS Ltd. is a private, employee-owned software development company founded in 1999. It provides constraint-based design tools, component technologies, and software development services for the CAD/CAM/CAE/PDM market.
For more information about LEDAS, see www.ledas.com.
LGS is a trademark of LEDAS Ltd. Any other trademarks are the property of their respective owners.
- 3D Web, Additive Manufacturing, Kernels and Solvers Raised LEDAS Earnings in 2020
- LEDAS Signs Contracts with Billion-Dollar US Firms
- LEDAS Reports on Business Through COVID-19
- Digital Medicine Drives LEDAS 2019 Revenues 20% Higher
- LEDAS develops a lightweight Nesting module based on genetic algorithms and optimization methods
- LEDAS Rebrands with New Logo, New Web Site, New Focus
- LEDAS Celebrates 20th Anniversary with New Office
- LEDAS Cloud Platform Licensed to U.S. Dental Company Mechanodontics
- OpenBOM™ and LEDAS Announce Partnership to Help Accelerate Product Development
- LEDAS to Offer a Software Platform for Building Cloud CAD Apps
- LEDAS Contributes to Renga Software
- LEDAS Protects Customers with New Software Insurance
- LEDAS Geometry Comparison Licensed for Inventor Plug-in
- AWV and LEDAS Deliver Powerful GPU-based Tessellation Software
- LEDAS Technology Searches and Compares Big Sets of 3D Models
- Geometry Comparison From LEDAS Now Supports All Major MCAD Formats
- LEDAS Releases 3D Comparison Technology to the B2B Market
- Here's To the Quindecennial of LEDAS!
- LEDAS Labs News: Geometry Comparison Technology, Parallel Computations, Cloud Systems and Much More
- LEDAS Attracts Ever More Software Development from Global CAM Market
- LEDAS Labs Starts with Cloud-Based Geometry Comparator
- Top Systems and LEDAS Present Brand New Geometric Kernel RGK at COFES Russia 2013
- OR Laser and LEDAS Sign Long-term Service and Consulting Agreement
- RGK Russian Geometric Kernel Celebrates First Full-Featured Version
- LEDAS Establishes US Business Entity to Better Serve Clients Worldwide
- Cooperation between ASCON, Bricsys and LEDAS Brings Variational Direct Modeling to KOMPAS-3D
- Software Developer LEDAS Sets Second Consecutive Revenue Record
- LEDAS to Distribute ASCON’s C3D Modeling Kernel Internationally
- LEDAS Experts: How our Company is Involved in Developing Russian Geometric Kernel
- Russian National 3D Kernel
- LEDAS Assists STANKIN to Develop a New 3D Modeling Kernel
- LEDAS Implements Variational Direct Modeling in KOMPAS-3D
- LEDAS Appoints Alexey Ershov as New CEO
- LEDAS Achieves Record Revenues from Its Portfolio of Software Development Services
- From the Prague Spring to a Siberian summer
- New Armor for Rhino
- LEDAS Drastically Improves Performance of its LGS 3D Constraint Solver
- Get back! (Personal Impressions from COFES-2011)
- RhinoWorks from LEDAS Revolutionizes Direct Modeling
- LEDAS Changes Leadership to Better Guide Future Development of CAD Technology
- LEDAS Appoints Dmitry Ushakov as New CEO
- Innovations Should be More Practical, Less Political. COFES-Israel Forum Report
- LEDAS Improves Google SketchUp 8 with Driving Dimensions 1.4
- Cimatron to Introduce New Motion Simulator Powered by LEDAS LGS 3D
- LEDAS Releases LGS 3D v4 Constraint Solver for Assembly Design and Direct Modeling
- LEDAS Improves Variational Direct Modeling with RhinoDirect 0.4
- LEDAS Releases LGS 2D v5 Constraint Solver with Extended Functions
- LEDAS Enhances 3D Geometry Editing for RhinoDirect Beta 0.3
- LEDAS made Constraints Demo Application available for all ODA members
- LEDAS Adds Advanced Parametric Drawing Functions to Version 4.0 of its 2D Constraint Solver
- LEDAS Releases Driving Dimensions v.1.3 for Google SketchUp
- LEDAS Adds Movie Recording and Localization to RhinoAssembly
- How To Make a 3D Cartoon in Rhino: A Practical Guide
- LEDAS Ships LGS 3D v3 for Variational Direct Modeling Developers
- Open Design Alliance and LEDAS Implement Parametric Drawing Tools Compatible with the DWG 2010 file format
- LEDAS Announces RhinoDirect 0.1
- University of Michigan Taubman College Licenses Academic Version of LGD 3D Geometric Constraint Solver by LEDAS
- LEDAS Enhances Parametric Drawings with Updated 2D Geometric Constraint Solver
- LEDAS Improves Parametric Design in SketchUp
- How to Express Design Intent in Rhino 3D
- LEDAS Ships Next Generation of 3D Geometric Constraint Solver
- LEDAS Adds Assemblies and Kinematics to Rhino
- LEDAS Geometric Constraint Solver LGS 3D Is Licensed By Joe Gibbs Racing
- LEDAS Improves Assembly Design and Kinematic Simulation in Rhino 3D and Announces History-Free Geometry Editing
- LEDAS Supports Research on Future CAD at Purdue University
- SketchUcation.com published an interview with Dmitry Ushakov about Driving Dimensions Plugin
- LEDAS Ports its Driving Dimensions plugin for Google SketchUp to Mac and Reports 10,000 Downloads of Windows Version
- ODA and LEDAS to Cooperate in the Development of Geometric and Dimensional Constraints in DWGdirect
- LEDAS Announces Beta Release of Driving Dimensions Plugin for Rhino
- COFES – Wish you were here
- The prodigal son of Autodesk
- LEDAS Announces Availability of its Variational Geometric Solver LGS for the Mac
- CD-adapco licenses LEDAS variational geometric solver LGS 2D
- LEDAS Celebrates its 10th Anniversary While Becoming Closer to CAD Users
- LEDAS Takes 3D History-Free Parametric Design to the Next Level by Releasing Driving Dimensions 1.0 Plugin for Google SketchUp
- LEDAS Opens Driving Dimensions Labs
- LEDAS Improves Variational Sketching Usability with Release 2.2 of its LGS 2D Geometric Solver
- LEDAS Helps CAD/CAM/CAE Developers Efficiently Model Large Assemblies with LGS 3D Geometric Solver Version 1.5
- Driving Dimensions for Google SketchUp Public Beta Downloads Top 3,000 in Three Months
- LEDAS expands capabilities of free parameterization in Google SketchUp
- VirtualCAD and LEDAS provide ROCOM with parametric on-line parts catalog
- LEDAS announced successful completion of the first stage of the project for localizing DELMIA solutions for the Russian market, commissioned by Dassault Systèmes
- LEDAS opens up parametric modeling for Google SketchUp users
- LEDAS is bringing the new technology of variational direct modeling to the market
- Variational Direct Modeling: How to Keep Design Intent in History-Free CAD
- LEDAS increases the productivity of LGS 2D variational geometric solver
- Common Pitfalls in Parametric CAD Systems
- LEDAS releases 64-bit version of its variational geometric solver
- Using LEDAS Computational Software Toolkits to Shorten Development Cycle of Variational CAD Systems
- LEDAS published first ever PLM Encyclopedia
- LEDAS announces successful Third isicad Forum «PLM+ERP: Informational Environment of a Modern Enterprise»
- LEDAS releases new version of its variational geometric solver LGS 3D
- LEDAS license Academic version of geometric solvers LGS 2D/3D to Northwestern Politechnical University, China
- LEDAS delivers ENOVIA SmarTeam in Russian for Dassault Systèmes
- LEDAS to release first ever PLM+ERP Encyclopedia on isicad-2008 conference.
- LEDAS on-line solutions simplify parametric CAD trainings.
- LEDAS extends its business by developing parametric parts libraries
- Swiss AWV Company succeeds with LEDAS geometric solvers
- From LGS to LGS-Toolkits: LEDAS proposes new computational components
- LEDAS to apply its CAD/PLM expertise to bioinformatics in partnership with Laboratory of Theoretical Genetics, Siberian Branch of Russian Academy of Sciences
Permanent link :: http://isicad.net/press_releases.php?press_num=14342