[GRASSLIST:3938] Re: NVIZ and vector for animation path

[Kevin Slover]

Paul,

    From what I have read and understand and accomplished with NVIZ, you must
create the path by changing the camera view.  I have yet to see if you are able
to pre-load a path with a vector file.  Generally, there would be a prompt of
some sorts asking you to enter a vector file.  Did you continue reading the
tutorial.  At the bottom, they have a bit more about key frames.

Hope this helps, and hope this is not misleading in any sorts...cheers...


Paul Hasenohr wrote:

> Hello,
>
> I have a new problem with NVIZ. In the NVIZ tutorial, it is written that
> 1) The Frames slider may be thought of as a time line representing the
> path. When a path has been loaded, clicking on run will move the viewer
> down the path, redrawing the wire frame surface at each path step.
> 2) total frames: The value in this type-in box is the total number of
> frames in the animation. When a vector file is first loaded, the number of
> points in the file (up to 1000) will be the number of frames. Typically, to
> produce smooth animations, the user should use a vector file with 10 - 50
> points, then change total frames to 100 or more, depending on the length of
> the animation desired. Requesting an excessive number of frames (i.e.,
> 500,000) may cause memory problems.
>
> I tried many times to start NVIZ with a vector file (with 3, 100 or 300
> points) built with s.to.vect and I never had a path loaded in the basic
> animation window.
>
> How can I build an animation by following a path defined by a vector file ?
>
> Thanks for your help
>
> Paul Hasenohr
> CLS
>
> PS : Markus, I just filled a bug report for my previous problem with 3D
> site files and NVIZ

--
LTJG Kevin Slover, NOAA
GIS Specialist/Oceanographer
NOAA/TPC/TSB/Storm Surge Unit
11691 SW 17th Street
Miami FL  33165

W (305) 229-4456