2014/10/15 下午 10:14:19

iphone Programming Glossary: spatial

http://stackoverflow.com/questions/4110893/skybox-opengl-es-iphone-and-ipad

leap. For supplying the geometry to OpenGL I've just written out the arrays in full. I guess you need a bit of a spatial mind to do it but sketching out a 3d cube on paper and numbering the corners would be a big help. There are three relevant..

Is there an offline geocoding framework, library, or database for iOS?

http://stackoverflow.com/questions/4373730/is-there-an-offline-geocoding-framework-library-or-database-for-ios

can be downloaded from cloudmade http downloads.cloudmade.com Then import this data into a sqlite DB . Then create a spatial index from this sqlite DB with geographic info in it such thing can be achieved using spatialite spatialite is a very good.. DB . Then create a spatial index from this sqlite DB with geographic info in it such thing can be achieved using spatialite spatialite is a very good GIS extension to Sqlite EDIT Spatialite provides a GUI tool to create a spatial database from.. Then create a spatial index from this sqlite DB with geographic info in it such thing can be achieved using spatialite spatialite is a very good GIS extension to Sqlite EDIT Spatialite provides a GUI tool to create a spatial database from various..

Finding the closest point to a given point

http://stackoverflow.com/questions/913576/finding-the-closest-point-to-a-given-point

closest one's to the current location of the iPhone. I've seen people ask about Quad Trees Dijkstra's Algorithm and spatial databases. Which is the best for the iPhone Spatial databases seem easiest but I am not sure. EDIT there are actually over.. share improve this question If you need better than O N you can only get that if you first pay N lg N for building a spatial hash of some sort a quadtree octree hash grid or similar . Then each test will be approximately O lg N and can be much better..