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Posted to dev@lucene.apache.org by "Karl Wright (JIRA)" <ji...@apache.org> on 2016/03/31 15:12:25 UTC
[jira] [Updated] (LUCENE-7154) Add support for polygon holes to
Geo3D
[ https://issues.apache.org/jira/browse/LUCENE-7154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karl Wright updated LUCENE-7154:
--------------------------------
Attachment: LUCENE-7154.diff
This is the initial patch, without tests.
It's brute force when it comes to splitting up holes during breakup of non-convex polygons into convex polygons; it just includes all of them with each convex polygon created. That's not idea because it misrepresents intersections etc., but it should generally work.
> Add support for polygon holes to Geo3D
> --------------------------------------
>
> Key: LUCENE-7154
> URL: https://issues.apache.org/jira/browse/LUCENE-7154
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Karl Wright
> Attachments: LUCENE-7154.diff
>
>
> Real-world polygons (e.g. from ESRI) have holes in them. We need polygon support in geo3D that works in the same way.
> The proposal would be to change the GeoConvexPolygon constructor to include a number of GeoPolygon inputs, each of which would specify a hole. Then, the GeoPolygonFactory.makeGeoPolygon() method would also need to accept a similar list of GeoPolygon hole descriptions.
> This change is likely to be fairly complex because of the already tricky algorithm used to create convex polygons from non-convex ones, implemented in GeoPolygonFactory.
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