Scientific Visualization Homework 2

Due Date: February 13

Overview:

In this homework you'll explore different algorithms for computing an isosurface.

Details:

Generate isosurfaces for the two data sets using the generic vtkContours and the specific vtkMarchingContours. Describe differences in using the two different algorithms to generate the isosurfaces. Use the data sets from cave.cs.duke.edu

/home/rbrady/crumbs/data/spine.ub

and

/usr/AvsExpress6.0/data/volume/hydrogen.dat

The spine data set is 256 x 256 x 202 unsigned bytes (making it 13238272 bytes exactly). The hydrogen data is 64 x 64 x 64 unsigned bytes with a 3 bytes header (making it 3 + 262144 = 262147 bytes exactly).

If the spine data is too large for your computer, try the lobster data:

/usr/AvsExpress6.0/data/volume/lobster.dat

Submit this homework by February 13 by linking it from your visualization web page created in the first homework.

Note: the patented classes of VTK (i.e. vtkMarchingContours) are not yet loaded on acpub. Be very careful to read in your data correctly! Take a look at the example

/afs/acpub.duke.edu/project/cps/pkgs/vtk-4.0/VTK/Examples/Modelling/Cxx/finance.cxx

Also use the documentation from the VTK site. Both of the datasets can be examined using AVS. Regularly check back to this homework page for further suggestions to assist with the technical details of vtk and the datasets and clarifications.