Hi Neil,
Thanks for the bug report with the code demonstration, I didn't
notice this behavior before, I'm not sure why it's happening, but
we'll look into it.
Thanks again,
- Don
On Oct 16, 2007, at 4:50 AM, Stevens, Neil wrote:
> Hi
>
> Sometimes I've noticed an OMCircle is not displayed when it is
> centered
> in the top right quarter of the map displayed. The attached example
> illustrates this. It should draw lots of red circles centred
> around the
> point (40, 30). However any circles with a radius of between 50 and
> 130
> degrees are not drawn when this example is run.
>
> I have noticed that an OMCircle is not displayed if
>
> 1) It is centred in the top right quarter of the visible map.
>
> AND
>
> 2) It has a radius greater than 90 minus centre point latitude
>
> AND
>
> 3) It has a radius less than 90 plus centre point latitude
>
> Alternatively use the openmap executable program and try drawing a
> circle centred in the top right quarter. The same problem occurs with
> the circle not being displayed.
>
> I am using windows XP with java 1.6 and openmap 4.6.3
>
> EXAMPLE PROGRAM:
> import java.awt.Graphics2D;
> import javax.swing.JFrame;
> import com.bbn.openmap.*;
> import com.bbn.openmap.layer.GraticuleLayer;
> import com.bbn.openmap.proj.*;
> import com.bbn.openmap.omGraphics.*;
>
> public class BasicMapFrame extends JFrame {
> // The Map bean
> private BufferedLayerMapBean mapBean = new BufferedLayerMapBean();
>
> // initialises the map bean and displays it in a frame
> public BasicMapFrame()
> {
> // add openmap bean to frame
> this.add(mapBean);
> this.setSize(800, 600);
> this.setVisible(true);
>
> //initialise openmap stuff
> MapHandler mapHandler = new MapHandler();
> mapHandler.add(mapBean);
> mapHandler.add(new LayerHandler());
> setMapProjection();
> mapHandler.add(new GraticuleLayer());
> }
>
> // creates a new BasicMapFrame and paints circles on it
> public static void main(String args[]) throws Exception
> {
> BasicMapFrame frame = new BasicMapFrame();
>
> // wait 2 seconds then paint the circles
> Thread.sleep(2000);
> frame.paintCircles();
> }
>
> // should paint read circles around the point (40,30)
> public void paintCircles(){
> Graphics2D graphics2d = (Graphics2D)mapBean.getGraphics();
> graphics2d.setColor(java.awt.Color.RED);
>
> // paint red circles centre around the point (40, 30)
> final float circleCentreLatitude = 40;
> final float circleCentreLongitude = 30;
> for(float circleRadius = 0; circleRadius < 180; circleRadius +=1)
> {
> OMCircle circle = new OMCircle(circleCentreLatitude,
> circleCentreLongitude,
> circleRadius);
>
> circle.generate(mapBean.getProjection());
> graphics2d.draw(circle.getShape());
> }
> }
>
> private void setMapProjection()
> {
> Projection currentProjection = mapBean.getProjection();
> CADRG cadrgProjection = new CADRG(currentProjection.getCenter(),
> currentProjection.getScale(),
> currentProjection.getWidth(),
> currentProjection.getHeight());
>
> mapBean.setProjection(cadrgProjection);
> }
>
> }
>
> Has any one else come across this bug and does any one know of a work
> around for this to make the circle appear?
>
> Thanks in advance for any help you can give me
>
> Neil
> --------------------------------------------------------
>
> Rosemount Aerospace Limited.
> Registered Office: Stratford Road, Solihull, West Midlands, B90 4LA.
> Registered in England No. 02849033.
>
> --------------------------------------------------------
>
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=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge MA
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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Received on Thu Oct 18 2007 - 08:29:05 EDT