Re: Ellipses

Hey,

I currently use the following code to create ellipses using OpenMap, it
works great!

/**
     * Create the ellipse
     * @return OMCircle
     * The fix ellipse
     */
    public OMCircle createCircle(float centerLat, float centerLon,
      int width, int height, double angle, Color color) {
        OMCircle circle = new OMCircle(centerLat, centerLon,
          width, height);
        circle.setRotationAngle(angle);
        circle.setLinePaint(color);
 return circle;
    }

jamie oldham

----- Original Message -----
From: "Pearson John T Jr GG-13 453 EWS/EWR" <John.Pearson@LACKLAND.AF.MIL>
To: "'Oscarson Erik'" <eoscarson@rayva.org>; <openmap-users@bbn.com>
Sent: Thursday, September 26, 2002 11:42 AM
Subject: RE: Ellipses

Classification: UNCLASSIFIED

On Thursday, September 26, 2002 10:14 AM, Erik Oscarson wrote

>There is a good possibility that I've missed something that already exists
within the API.

Perhaps someone else has developed what you need, and would be willing to
share it with all of us OpenMap users/developers.

Regards

John pearson

-----Original Message-----
From: Oscarson Erik [mailto:eoscarson@rayva.org]
Sent: Thursday, September 26, 2002 10:14 AM
To: openmap-users@bbn.com
Subject: Ellipses

Hi All,

I'm trying to use OMCircle to create ellipses that have major and minor axes
that use Length, like the
OMCircle constructor [OMCircle(float latPoint, float lonPoint, float radius,
Length units)] uses for radius.

I'm not sure if this is a good approach or not, but I am planning on
extending the OMCircle class (OMEllispe maybe?) and setting something up
that would simply derive the H/W from the projection during generation and
then use that to rebuild itself as necessary. This approach is
geographically unsound, but at smaller zoom levels it might work well
enough.

I do not have knowledge of the math necessary to do this correctly, but I'm
still going to play around with it.

There is a good possibility that I've missed something that already exists
within the API.

Erik Oscarson
Raytheon
eoscarson@rayva.org

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