Martin, Why would mutable Features be a bad idea?
SS On 7/9/07, Martin Davis <[EMAIL PROTECTED]> wrote: > > > Stefan Steiniger wrote: > > > > my 2 cents: > > i think my first implementations also modified coordinates of layer > > geometries directly. But in general, i always copy a geometry and modify > > the coordinates with coord.x > > > Good - that's the right way to do it. > > Otherwise, what would be the way to do map generalisation (such as > > applying a line smoothing algorithm that displaces vertices without > > changing the number)??? I know, that by using the Douglas Peucker > > algorithm a new Geometry object could be created afterwards, but here as > > well online-modification may be worth? > > Hence, for me Geoemtries are mutable. (But suggestions are welcome) > > > For any operation on a Geometry, you can always create a new Geometry to > represent the result of the operation. This Geometry can be stored back > in the the Feature object the input came from. > > Note that this implies that Features are mutable. I'm not 100% sure > this is a good idea either - but it's less bad than mutating Geometries. > > -- > Martin Davis > Senior Technical Architect > Refractions Research, Inc. > (250) 383-3022 > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
