Sorry, I am just getting to this. I have the patch in my email box too.
Can you explain what "buffer of line" is? I want to know if it is of
general usefulness.
---------------------------------------------------------------------------
Alex Shevlakov wrote:
> New 'path' functions (test results can be found at http://motivation.ru/grass/buff_q_example.html):
>
> There are not many (as my task was only limited to extending GRASS vector
> capabilities to buffering):
>
> /*check if a point is within buffer of line*/
> Datum path_buffer_contain_pt(PG_FUNCTION_ARGS);
>
> /*removes multiple repeated points from path*/
> Datum path_without_doubles (PG_FUNCTION_ARGS);
> static PATH * path_no_dbles(PATH *path);
>
> /*returns closed path which is buffer to another path*/
> Datum return_path_buffer(PG_FUNCTION_ARGS);
>
> /*used to insert points along circle segment between two ends of non-intersecting buffer segments, smoothing the
buffer*/
> static Point * point_rotate (Point *lpoint, Point *ax_point, float ang,
> int k, int n, int napr);
>
> /*writes path to arcinfo UNGENERATE format which is particularly useful for viewing buffer in GRASS*/
> Datum write_path_to_file(PG_FUNCTION_ARGS);
> int write_path_to_file_internal(PATH *path, char *str );
>
> /*generalize path,i.e., leave each third, or fourth, etc., point*/
> Datum reduce_path_points(PG_FUNCTION_ARGS);
> static PATH *path_reduce(PATH * path, int n_reduce);
>
> On Tue, May 07, 2002 at 07:01:05AM -0700, Thomas Lockhart wrote:
> > > I'd like to contribute new code for Postgres geometry type 'path' operations
> > > (including line buffer). Where should I send this?
> >
> > Send to pgsql-patches@postgresql.org. It may be helpful to (i.e. please
> > do) post a summary of what you are intending to send to this mailing
> > list so folks have an idea of what is coming...
> >
> > Regards.
> >
> > - Tom
>
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