Re: Marker rotation

For the record, Alan Brammer has pointed out that the low-level function
NhlNewMarker will allow for the rotation of markers created from text
strings, such as using lower case 'u' on font 34 (see:
http://www.ncl.ucar.edu/Document/Graphics/Images/font34.png).

While it's not a perfect solution as the font tables don't contain the best
arrowheads (although there are other pretty good substitutes), it is
probably the best workaround for those who wish to pursue some of the
plotting techniques I mentioned in my original post. It would still be nice
to see a somewhat simpler implementation of this feature in a future
release, if possible.

Kyle
----------------------------------------
Kyle S. Griffin
Department of Atmospheric and Oceanic Sciences
University of Wisconsin - Madison
1225 W Dayton St, Madison, WI 53706
Room 1421 Email: ksgriffin2@wisc.edu

On Fri, Sep 7, 2012 at 11:14 AM, Kyle Griffin <ksgriffin2@wisc.edu> wrote:

> Although this has been discussed some recently with the Southern
> Hemisphere TC symbol, it does not appear that there is a way to rotate any
> of the default markers. I realize a number of them are axisymmetric and
> wouldn't benefit from the inclusion of this resource, but others (like the
> arrows) would allow some additional, useful applications. An interface
> similar to that for text, utilizing a resource akin to gsTextAngleF, would
> seem possible based around the defined location of the marker (I would
> think preferably the center). Is this something that could possibly be
> added?
>
> My application in mind is to plot arrowheads on the end of lines, such as
> in the case of annotations, streamlines, or trajectories. It does not
> appear to be currently possible via line or marker resources, and the only
> possible workaround is to use text and a few of the arrows provided in font
> 35, for example, rotated and shifted to align with the correct end of the
> line. In reality, the amount of effort to calculate the correct
> justification shift for each figure is prohibitive compared to the amount
> of time it takes to add these features in another program after the fact
> (e.g. PowerPoint or Illustrator). Thanks for the consideration,
>
>
> Kyle
> ----------------------------------------
> Kyle S. Griffin
> Department of Atmospheric and Oceanic Sciences
> University of Wisconsin - Madison
> 1225 W Dayton St, Madison, WI 53706
> Room 1421 Email: ksgriffin2@wisc.edu
>
>

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Received on Fri Sep 7 10:53:59 2012