| Re: Object Graphics [message #9623 is a reply to message #9421] |
Wed, 23 July 1997 00:00   |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Reinhold Kroll writes:
> Has anybody out there successfully used object graphics
> from IDL 5.0?
Yes, sort of. :-)
There are several examples of programs written using object
graphics on my web page. See for example XPLOT, which is
probably similar to the program you wrote.
> I put a very simple sine wave to the printer object and
> it creates me a 15 MB file, runs quarter of an hour or
> so. => completely useless.
You don't say what platform you are using, but I have
noticed similar things myself. The size of the output
file with XPLOT, for example, varies depending upon
what printer I have selected as my default printer. But
with my windows NT machine, the file varies from 1-1.5 Mbytes
in size. This is quite a bit larger than a regular PLOT command
in IDL, but is understandable given the nature of object
graphics and how they must be rendered. (For example, in
direct graphics only the two end points of a line are
required to render the line. In object graphics each pixel
will essentially be rendered individually, since each
has a 3D "space" associated with it.)
When I printed XPLOT on my Macintosh, however, the file was
over 21 MBytes in size (yes, 21, not 2.1!) and it never did
come out of my printer in the 3.5 hours I waited for it.
This was the first Mac beta release, and I am assured by the
folks at RSI that the latest Mac builds to not have this
problem.
I am also getting strange reports from people who have
downloaded some of my programs. Some people report ugly
colors (which I believe is a graphics driver problem of
some sort), and other people report that some of my
programs work and others either don't display properly
(the screen is blank), or they crash their machines. I
don't know what to make of any of this. The programs work
great on my machine.
I do know that there are quite a few bugs in the object
graphics part of IDL (to be expected, really, in such
a major new release) and I hear that an updated version
with my bug fixes will be available by the middle of
August.
Good luck,
David
------------------------------------------------------------ -
David Fanning, Ph.D.
Fanning Software Consulting
Customizable IDL Programming Courses
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com
IDL 5 Reports: http://www.dfanning.com/documents/anomaly5.html
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