NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi Nick, > I'm thinking of using VisAD for run-time visualization as part of a > simulation framework. The simulation is "tick-based" such that some > computation occurs each tick, data is generated and then visualized. So > the visualization is dynamic and updated each tick. From a brief scan > through the mailing list archives it looks like VisAD would be suited > for this. Is it? Has anybody done anything similar? > > I have been using sequence charts and bar graphs from JClass, but they > aren't giving me the flexibilty I need. If you are running on Sparc Solaris, you can run: java visad.aune.ShallowFluid This steerable 2-D shallow fluid model is distributed with VisAD. It links to the Fortran fluid model via JNI (Java Native Interface), and calls the Fortran once per time step. You can watch the simulation run, or you can use sliders to vary things like gravity and watch the consequences. Once you link a VisAD Data to a Display, via a DataReference, then the Display updates its depiction of the Data whenever the Data value changes (or whenever the DataReference is aimed at a new Data object). If the Display rendering cannot keep up with the changes to the Data then you won't see every time Data change. However, you can create a DisplayListener that waits for the Display to update before allowing the model to compute the next time step, if you want. You can also link a VisAD Data to a computation coded in a VisAD CellImpl, in which case the computation is triggered whenever the Data changes. Thus CellImpls can be used to chain computations, and is used in the VisAD SpreadSheet for this behavior. Cheers, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
visad archives: