drw900@cacofonix.anu.edu.au (11/05/90)
I'm looking for volume data for testing a hybrid surface/volume rendering raytracer. Is there anyone who has some that they think would - (a) make a nice picture, and (b) wouldn't mind if the the pictures were shown in public I would be quite happy to acknowledge the source of the data in anything that I actually show or publish. Also I'd be happy to ftp any nice pics I make to the donor of the data. Currently the program reads VoxelView format data files (a few came as demo's on my Iris..), but data in any format would be fine. Is anyone else doing this sort of thing ? Basically the code does the same sort of thing as Perlin, and Kay/Kajiya's "furry" code's are doing. I'm interested in hearing about optimizations people make for speeding up this sort of rendering, it ain't fast !! One thought I've had is making the step length along the ray adaptive, ie if not much is happening at a particular part of the volume start doubling the step length and vice/versa. Sort of like adaptive methods for solving DE's. -- /*---------------------------------------------------------------------------*/ /* Drew Whitehouse, E-mail: drw900@anusf.anu.edu.au */ /* Visualization Programmer, (and if that fails...)drw900@csc2.anu.oz.au */ /* Australian National University, Phone : (06) 2495985 */ /* Supercomputer Facility. Fax : (06) 2473425 */ /* GPO Box 4, Canberra ACT Australia 2601. */ /*---------------------------------------------------------------------------*/