>Hi, > how to define general unstructured grids on the Native File Format? ie. >hexas, tetras, and other polygons in a mixture? To me it seems that I have >to specify "cubes" or "tetrahedrals" as attribute ro the connections. > >Thank you! >/Niklas, new in the game.
You cannot mix topologies within a single "connections" element. The only permitted polyhedra are cubes (in practical usage, only cubes"3D" or hexes) and tetrahedra. The only permitted polygons are quads and triangles. Wedges, pyramids, etc. must be decomposed to tets. Mixed topology including tets and hexes must be decomposed to tets or separated into two distinct fields with different topology (which imposes limitations on functions like Streamline that can't pass through the boundary). CollectMultigrid is not an option since the same topology must exist in all member fields. The definitions for those elements that are permitted are easiest seen in the PDF documents online (the html versions obliterate the details due to lousy scanned images). http://opendx.npaci.edu/docs/pdf/userguide.pdf Chapter 3, page 21 (this is page 57 in the PDF but 21 in the scanned document) Chris Pelkie Vice President/Scientific Visualization Producer Conceptual Reality Presentations, Inc. 30 West Meadow Drive Ithaca, NY 14850 [EMAIL PROTECTED]
