I realize this isn't the fix Don is thinking about, but i just converted all float to double in src/openmap. This gives 105 compiler errors many of which can be fixed easily.
One issue it uncovered is that BasicGeometry uses java.awt.geom.GeneralPath
At 02:43 PM 10/5/2004 +0000, Hudson Brian R Contr AFRL/IFSF wrote:
>"urn:schemas-microsoft-com:vml" xmlns:o = "urn:schemas-microsoft-com:office:office" xmlns:w = "urn:schemas-microsoft-com:office:word">
>Hey,
>
>Don gives some suggestions here on how to modify OpenMap to use doubles.
>
><http://openmap.bbn.com/mailArchives/openmap-users/2003-12/2104.html>http://openmap.bbn.com/mailArchives/openmap-users/2003-12/2104.html
>
>Many people seem interested in this, but I haven't heard of anyone doing it successfully. Don indicates that is a large job.
>
>I'm not sure that rendering in XY will help. When you are at that scale OpenMap attempts to determine the XY location of things based on its lat/lon. At that scale the lat/lon per pixel is so small that rounding errors (and precision) can really mess up the drawing (as you can see by using the drawing tool). You could attempt to use XY rendering but in order to get the XY points won't you have to use the projection classes to turn your lat lon points into XY coords? Doing this will cause you to suffer the rounding/precision problems that OpenMaps lat lon render type is having at the at scale.
>
>You could possibly write your own lat/lon to xy function that would take the scale and top left/bottom right lat lon points, then using doubles calculate the delta per pixel, then using that information to calculate the XY coords of your rendering in order to get a bit more precision.
>
>Brian Hudson
>-----Original Message-----
>From: owner-openmap-users_at_bbn.com [mailto:owner-openmap-users_at_bbn.com] On Behalf Of Rubén Ruiz
>Sent: Tuesday, October 05, 2004 9:22 AM
>To: Openmap Mailling-list
>Subject: [OpenMap Users] rendering problem still remains
>
>Hi all,
>
>
>
>Fitst of all i would like to thank to Brian Hudson for his ideas...thanks brian.
>
>
>
>When I use XY / XY-Offset Rendering type I can draw perfectly, but...my problem is not just when I'm drawing, I've a set of maps coming from autocad, I've managed to translate them into shapefiles in Lat/Lon. The problem comes with many lines/polygons using a high scale (1:62) projection. The normal polygons are more or less "visible", but all my circles are not. I don't know if I can change the rendering type for all my lines/polys when I load them or anything similar. Also when I draw a nice circle with XYOffset and I save it in a SHP, it really stores a rectangle, and if I load that shp again I can see a perfect rectangle...I cannot store nothing rendered with any XY render type.
>
>
>
>At this point I've been thinking in varius exits to this problem:
>
>
>
>- if its possible to render XY all my graphics I think it'll be solved, but I've tried with no success...
>
>- if it would solve this problem...could I change all float members to double or is there any restriction that makes it impossible? Do you know where can I begin to change and what portion of openmap do I've to change? I think the main problem resides in the projection classes but I need some "light" from you, I've not been working with openmap too much, and every day I find new fancy things.
>
>
>
>I hope someone can help me...
>
>
>
>Thanks in advance,
>
>Rubén.
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Received on Tue Oct 05 2004 - 13:57:26 EDT