Purdue University (USA)

Purdue University is a world-famous center of excellence in the domain of computational geometry, background of CAD and PLM, and its applications. During preparation of the isicad-2004 international Forum LEDAS have had a lot of contacts with Christoph M. HOFFMANN, one of the leading expert from Purdue University (currently – the director of the university PLM center) and invited him to be an invited speaker with a talk on geometric constraint solving. That’s why LEDAS was very glad couple years later to receive from Purdue a request for the LEDAS constraint geometric solver and granted to the university a free academic license. Some results of this cooperation were described in a following press-release.

NOVOSIBIRSK, Russia, Aug 10, 2009 - LEDAS Ltd., an independent provider of computational components and software development services for the CAD/PLM (Computer-Aided Design and Product Lifecycle Management) market, today announced that ongoing research at Purdue University (USA) in the field of CAD user interfaces, partially supported by LEDAS, has recently resulted in creation of a prototype CAD system that allows users to draw as natural as possible just as one would draw on paper. In 2007 LEDAS granted a free academic license for its geometric constraint solver LGS 2D to Purdue University. Since then a research group under supervision of Prof. Karthik Ramani has successfully integrated LGS 2D with their prototype with presenting the results at two scientific events. The first presentation was done at the Sixth Eurographics Workshop on Sketch-Based Interfaces and Modeling, Aug 1-2, New Orleans, USA, co-located with SIGGRAPH 2009. Another paper will appear in the proceedings of the ASME 2009 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2009, August 30 - September 2, 2009, San Diego, CA, USA.

“Beautification of freehand sketches is integral for building robust sketch understanding systems and sketch-based interfaces for CAD,” said Sundar Murugappan, a Ph.D. student and co-author in both the publications. Professor Ramani added that “Many of the current methods for beautification do not consider some important information implied in the sketches such as spatial relationships (geometric constraints) between primitives. We present our ongoing work, a suggestive interface for constraint-driven beautification of freehand sketches which provides multiple interpretations of the freehand input, from which the user can choose the intended result.” The research was supported by the U.S. National Science Foundation (NSF) Computer and Information Science in Engineering (CISE) – Information and Intelligent Systems (IIS).

“Purdue University is famous for its world leading researchers in the field of computer-aided design and geometric constraint solving, and we are very proud to support their research aimed at building user interfaces for tomorrow’s CAD systems,” said David Levin, CEO and founder, LEDAS Ltd. “We are also supporting several universities in Russia and China by granting them free academic licenses for our computational software. A combination of our industrial experience in the field of constraint-based design with state-of-the art research results in invention of the new generation CAD systems.” In the framework of its academic licensing program LEDAS grants free licenses for 2D and 3D versions of its geometric constraint solvers LGS to non-commercial Academic and Educational organizations. A Free Academic Licensing approach gives researchers and students a unique opportunity to access this state-of-the art parameterization technology.