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Subject: Buffer op - end cap styles - msg#00041List: gis.geos.develI am now using the GEOS buffer op and am VERY excited about it. My own implementation of straight skeleton isn't robust, but the GOES buffer op worked the first time. :-) A few questions: I tried changing the cap style to round but I see no change. Is there something basic I'm missing? geos::operation::buffer::BufferOp bufOp(poly); bufOp.setQuadrantSegments(4); bufOp.setEndCapStyle(geos::operation::buffer::BufferOp::CAP_SQUARE); geos::geom::Geometry * buf = bufOp.getResultGeometry( -30.0 * MTR_TO_NM * NM_TO_DEG_LAT); (The code is written using a buffer op object because I was trying to eliminate wrapper layers as possible causes of the wrong end-cap style.) Also, how can I compile a debug build of GEOS? Are there flags in the configure file for this? I'd like to be able to break within the lib in gdb. (I am compiling on Mac OS X using the std unix configure file.) Finally, would it be algorithmically possible to modify the buffer operation to buffer different line segments by different amounts, or does the algorithm require uniform buffering? Thanks! Ben -- Scenery Home Page: http://scenery.x-plane.com/ Scenery blog: http://xplanescenery.blogspot.com/ Plugin SDK: http://www.xsquawkbox.net/xpsdk/ Scenery mailing list: x-plane-scenery@xxxxxxxxxxxxxxx Developer mailing list: x-plane-dev@xxxxxxxxxxxxxxx Thread at a glance:
Previous Message by Date: click to view message previewNewbie Question - planar graph vs geometry graphHi, I do apologize if this is a dumb question but... Could someone please help me understand the relationships between the planar graph, geometry graph, and spatial indexing classes? I see two "planar graphs" in different namespaces, but no docs on "geometry graph" yet, so I'm a little bit confused on where to look. I'm looking for four types of functionality: - A spatial index to speed up queries within an envelope. (Looks like there are plenty of classes for that. :-) - A planar map that can contain already-built topological planar graphs from a file (e.g. I already have the topo info and need a container to hold it and do things like adjacency queries and iteration). - A planar map that can be built from GIS primitives like polygons and multi-polygons. In particular if there are classes that can do more than one of these tasks with a performance advantage, that's what I'm really after. If anyone can point me at the right classes for the right jobs, it would be greatly appreciated! *cheers* ben -- Scenery Home Page: http://scenery.x-plane.com/ Scenery blog: http://xplanescenery.blogspot.com/ Plugin SDK: http://www.xsquawkbox.net/xpsdk/ Scenery mailing list: x-plane-scenery@xxxxxxxxxxxxxxx Developer mailing list: x-plane-dev@xxxxxxxxxxxxxxx Previous Message by Thread: click to view message previewNewbie Question - planar graph vs geometry graphHi, I do apologize if this is a dumb question but... Could someone please help me understand the relationships between the planar graph, geometry graph, and spatial indexing classes? I see two "planar graphs" in different namespaces, but no docs on "geometry graph" yet, so I'm a little bit confused on where to look. I'm looking for four types of functionality: - A spatial index to speed up queries within an envelope. (Looks like there are plenty of classes for that. :-) - A planar map that can contain already-built topological planar graphs from a file (e.g. I already have the topo info and need a container to hold it and do things like adjacency queries and iteration). - A planar map that can be built from GIS primitives like polygons and multi-polygons. In particular if there are classes that can do more than one of these tasks with a performance advantage, that's what I'm really after. If anyone can point me at the right classes for the right jobs, it would be greatly appreciated! *cheers* ben -- Scenery Home Page: http://scenery.x-plane.com/ Scenery blog: http://xplanescenery.blogspot.com/ Plugin SDK: http://www.xsquawkbox.net/xpsdk/ Scenery mailing list: x-plane-scenery@xxxxxxxxxxxxxxx Developer mailing list: x-plane-dev@xxxxxxxxxxxxxxx Loading Comments...
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