Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Bill: Do you have a sense of how far out-of-square you have to go to see the problem? I am also giving folks the ability to do interactive iso-surfaces but haven't been able to make it work yet--I just get a blank display. I'm using the Tutorial code as a starting point. Test62 doesn't seem to do anything either but the code also doesn't seem complete either (from my first read of it). You're probably right to be less concerned about aliasing with this type of visualization but the memory issues can still be problematic with bigger grids. oz ----- Original Message ----- From: Bill Hibbard <billh@xxxxxxxxxxxxx> Date: Friday, February 14, 2003 9:31 am Subject: Re: Volume visualization strangeness > John, > > > Looks like you're saying this is a feature. My concerns with > resampling> the grid to make things cubic are that I'm going to > pay a large memory > > penalty (maore than an order of magnitude greater in the case of the > > 61x61x5 example) and I risk aliasing the original grid. In addition, > > users of ncBrowse will be stuck with how I choose to resample > the grid. > > I wouldn't worry about the aliasing, since volume visualization > isn't very quantitative. Its just a colored fog. > > You could use a test to only resample beyond a certain degree > of out-of-square. Also, give users a choice of other techniques, > such as interactive iso-surfaces, that they can use when volume > visualization isn't effective. > > Also, I'd still be interested to see a JPEG or GIF of one of > your problem images. > > Bill > >
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