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Re: IDL graphics w/ no display [message #41487 is a reply to message #41415]

Wed, 27 October 2004 11:32

KM
Messages: 29
Registered: October 2004

Junior Member

On Wed, 27 Oct 2004, Ben Tupper wrote:

> Ken Mankoff wrote:
>
> (1) About OG without a display device.
>
> I think you canuse the IDLgrBuffer as the destination drawing device. The
> following works without X11 (MacOSX).

Yeah that code works. But the only reason I am considering OG is
because of anti-aliasing. But it turns out only IDLgrText supports
anti-aliasing! I had hoped all lines would be aliased, not just the
text...

> (2) I think that the iMap might be disguising how easy it can be
> to transform map polygons into the OG realm. I recall a thread on
> this newsgroup where somebody tessalated the Polygons for Alaska
> and then threw them into an object graphics destination. (I think
> it was Karl - but I haven't found that thread.) With the advent
> of the MAP_PROJ_***** routines, it sure seems like RSI has freed
> mapping from the DG world. So, somewhere in iMap, the CIA map
> data (or the Shape file data) that comes with IDL is unpacked and
> then formed into OG polygons. That said, I have no experience
> with OG mapping although I started down that path once in an idle
> moment.

It might be this:
http://tinyurl.com/445dg

My new question is this: If I am producing static images written to
disk, and making heavy use of the ma_set, map_grid, etc code, and
_not_ doing interactive stuff, does it make sense to use OG or DG?

The only advantage to OG is pretty text, not even pretty lines.

-k.

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[Message index]

		IDL graphics w/ no display By: KM on Fri, 22 October 2004 15:21
		Re: IDL graphics w/ no display By: KM on Wed, 27 October 2004 13:46
		Re: IDL graphics w/ no display By: David Fanning on Wed, 27 October 2004 11:50
		Re: IDL graphics w/ no display By: JD Smith on Wed, 27 October 2004 11:48
		Re: IDL graphics w/ no display By: KM on Wed, 27 October 2004 11:32
		Re: IDL graphics w/ no display By: Liam Gumley on Mon, 08 November 2004 08:28

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