>Any one knows about any rpms that can do distance measurements in >3D? i.e. can I click two points on a 3D image and get distance info? >thanks. >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Ching-nien Chen, Ph.D. > BEPS/ORS 13/3N-17 > National Institutes of Health > Bethesda, MD 20892-5766 > 301-402-2955 (tel & fax) > [EMAIL PROTECTED] >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You shouldn't need an rpm. Use Pick to select an object, or Probe to set a point in space. Then Extract the appropriate item from the Pick structure. Given two points, Compute mag(a-b). In Pick, open the dialog box and turn on interpolate so DX will find the nearest real (data) position to your Pick (since your hands and mouse are clumsy and not likely to land precisely on a position in the data object). You can have more than one Pick in a net at the same time (named to keep them straight). So 2 Picks feeding the Compute. Probe is similar but does not fire a ray through the object and return info about the hits: Probes are just positional cursors within the 3D volume, so you only know the spatial location initially. You can Map data onto the Probe position if you want to. Chris Pelkie Vice President/Scientific Visualization Producer Conceptual Reality Presentations, Inc. 30 West Meadow Drive Ithaca, NY 14850 [EMAIL PROTECTED] (607) 257-8335 or (607) 254-8794
