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PolygonHoles

M

Mac

Messages
92
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ca-britishcolumbia
Need some help!
Using FSX KML 1.10 Beta
Google Earth Version 5.0.11733.9347


I am trying to create some islands and have used the following.

1. I have made four excludes all which touch each other forming a rectangle. (Exclude__WaterPolys)

2. I then made a large poly to cover all four exclusions using (Hydro_Polygons_Generic_Ocean_Perennial).

3. I then made four islands. These were made clockwise and tagged with (PolygonHole).

4. I then use FSX KML to create the bgl. When using the BUILD I leave "Automatically reverse order of vertices in polygon holes" checked.

This is in accordance with Wiki
"If you are using Google Earth, all polygons are written to the KML file in an clockwise direction irrespective of how they were drawn. FSX KML has the build option "Automatically Reverse Points In Polygon Holes" which will automatically reverse the direction of polygon holes. This is on by default because it is assumed most users will use Google Earth to create their KML files."


For some reason the islands done this way do not show up.

However, if I uncheck "Automatically reverse order of vertices in polygon holes" they will show.


Was wondering if something has changed with Google Earth or FSX KML?
 
Update

Definitely some strange goings on.

Shortly after posting the first message I booted up the sim and the islands didn't show up!:mad:

Went back to FSX KML and checked it so it would reverse the polygon hole and the islands were there again. :o Go figure.

Yesterday I started a new bgl in the same area and needed some islands in a river. Guess what, with the reverse polygon checked the islands didn't show up.

I unchecked the reverse polygons and now I have islands. So far this time I have had to leave it unchecked or they disappear.

Wonder if this could have something to do with Google Earth?:confused:
 
As far as I can see, the order that Google saves polygon vertices is not determined by the order in which you draw them.
Try this- open a polygon that you have previously saved in Google KML and edit it. Select a vertex & press delete a few times, notice which direction the next few verts delete in sequence.
 
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