pdbourke@ccu1.aukuni.ac.nz (Bourke) (02/20/91)
In article <1991Feb14.190639.26922@lynx.CS.ORST.EDU> johng@OCE.ORST.EDU (John A. Gregor) writes: >We have a relatively large (several thousand) set of ocean samples in >3-D that we want to visualize. Unfortunately, all the tools we have >demand that the data be represented as gridded data or as a connected >mesh (either tetrahedrons xor hexahedrons). Any pointers to routines >or literature to accomplish this would be greatly appreciated. I have a utility package called triangulate that does what you require. It runs on a Mac II, it takes as input a text file of randomly distributed samples and generates either a Delauney traingular mesh or a gridded approximation to any grid density. For output it generates a 3D DXF file using the 3DFACE DXF primitive, suitable for opening and viewing by most 3D modelling/CAD packages. (It also generates other 3D formats appropriate to the Macintosh.) If this sounds promising I am happy to let you have the program and/or the source code written in C. We use it primarily for terrain modelling. One of the problems with many techniques for this sort of work is that many algorithms do not handle large numbers of samples. We have used our program for over 20,000 sample points. ==================================================================== From: pdbourke@ccu1.aukuni.ac.nz AppleLink: NZ0028 Postage: Architecture School, Auckland University Private Bag Auckland New Zealand PH: NZ (09) 737 999 x7367 Fax: NZ (09) 366 4665 ====================================================================