As David says, no easy answer. However, there is an approach that allows one to click on an object and find all connected parts. This was originally done by Ed Farrell (an IBM DXer from the mid 90s). We (and Marilyn at NYU) have used derivatives of this to allow the removal or inclusion of disjoint parts of an isosurface from Isosurface().
If this would be of value, I can dig up the module and post it. But it does require one to manually click on each object to select it (in your case, to color it as desired). Mike > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of David > Thompson > Sent: Monday, July 25, 2005 9:36 AM > To: opendx2-users@lists.berlios.de > Subject: Re: [opendx-users] Dividing a surface into disconnected parts > > > The lack of response is due to the lack of an easy answer. The > problem would be that the isosurface that is returned is a single > field and thus not easily divided. You could use something like > include on the positions to try and do this, but its not going to be > easy. > > David > > >Hello, > > > >I'm new to OpenDX, so please forgive me if what I'm asking is > trivial. I have > >a 3-d scalar field f(x,y,z), and I managed to import it into > OpenDX and have > >it calculate an isofurface f(x,y,z)=c using the Isosurface module. For my > >input data, this surface consist of several disconnected parts. How can I > >plot each part in a separate color? Right now, since by > definition the value > >of the field is constant for each surface, they are all plotted > in the same > >color. > > > >Is there an easy way to accomplish this? Any help would be much > appreciated. > > > >Thanks, > > > > Lutz > > > -- > .................................................................. > ........... > David L. Thompson Visualization and Imagery > Solutions, Inc. > mailto:[EMAIL PROTECTED] 5515 Skyway Drive, Missoula, MT 59804 > Phone : (406)756-7472 >
