metz@bolek.iam.unibe.ch (Igor Metz) (11/02/90)
Hello, I need an implementation of TINs (triangulated irregular network). We need it to represent a terrain that will be displayed in a realtime simulation. C++ code would be great, any other input is also VERY appreciated. Thanks for your help Igor Metz Institut fuer Informatik und angew. Mathematik, Universitaet Bern, Switzerland. domainNet: metz@iam.unibe.ch Phone: (0041) 31 65 49 90 ARPA: metz%iam.unibe.ch@relay.cs.net Fax: (0041) 31 65 39 65
hitchner@riacs.edu (Lewis Hitchner) (11/07/90)
This is a reply that I attempted to email directly to the author. Our mailer returned my message to me with a "host unknown" error. So, I apologize for posting it here, but maybe some others will find some useful information as well. -------------------- Date: Tue, 6 Nov 90 13:44:14 PST From: Lew Hitchner <hitchner> To: metz@bolek.iam.unibe.ch (Igor Metz) Subject: Re: TIN implementation? We attempted to implement TINs (based upon the paper by Fowler and Little in SIGGRAPH '79) this past summer. The work was done by a summer student, but he did not complete it nor get anything debugged before he left to go back to school. Thus, I cannot offer you any code as your news article requested. But, if anyone else responds to your request, could you please forward the message to me? By the way, there has been some more recent work done on this by Pavlidis and a colleague who is now working at Grumman Data Systems in New York (a U.S. manufacturer of flight simulators). I heard a presentation of their work recently at the Visualization '90 conference in San Francisco. You may request a copy of their conference paper "Hierarchical Triangulation Using Terrain Features" and a longer technical report from Ms. Lori Scarlatos Grumman Data Systems 1000 Woodbury Rd. Woodbury, NY 11797, U.S.A. (sorry, I don't have an email address for her). They extended the work by DeFloriani (Computers and Graphics, 1984 and IEEE Computer Graphics & Applications, 1989), and claim that their results give a better fit to the original digital terrain grid with a smaller number of triangles. Lew Hitchner RIACS at NASA Ames Research Center Moffett Field, California (near San Francisco)