williams@casbah.acns.nwu.edu (Gus Williams) (05/18/91)
I have two questions. The first concerns XDataSlice from NCSA.
I have read the documentation carefully and though it never actually
gives these requirements they appear to be true.
Does XDataSlice require a "square" data set? That is do the
X, Y, and Z dimensions of the array of data need to be the
same? and does it now or in the future support variable spacing
of the data grid? I know the vset extensions to HDF support these
items but do any of the visualization tools available from NCSA support
them?
Second question. I have been reading the Dynamics Graphics sales
literature. They use a method for iso-surfaces called (in their
literature) minimum tension surfaceing. What is this? Can anyone
point me to any good papers or references that give the algorithm?
Third question. (OK I lied when I said I only had two) Has anyone
implemented a 3D spatial averaging formula? Something like distance
squared weighting or krieging in 2D. I work with sparse data sets,
well samples, drill corings, etc, and to get good pictures you generally
need a much denser (sp) grid than I use. However, most of the variables
I am interested in vary continiously in 3D space. A pointer to a good
paper or algorithm would again be appreciated.
Thanks in advance.
--
GUS WILLIAMS williams@casbah.acns.nwu.edu
(708) 491-3838 williams@voltaire.cme.nwu.edu
(708) 972-4609 williams@adelaide.ees.anl.gov
Escape from the real world, get a PhDlawrance@ncsa.uiuc.edu (David Lawrance) (05/20/91)
In article <1991May17.201453.15628@casbah.acns.nwu.edu> williams@casbah.acns.nwu.edu (Gus Williams) writes: > Does XDataSlice require a "square" data set? That is do the > X, Y, and Z dimensions of the array of data need to be the > same? and does it now or in the future support variable spacing > of the data grid? I know the vset extensions to HDF support these > items but do any of the visualization tools available from NCSA support > them? 1) Data dimensions can be different. 2) Data does not have to be regularly gridded. 3) PolyView supports the newer vset extensions. Documentation and software available via anonymous ftp at ftp.ncsa.uiuc.edu