lwline_split_by_mpoint()

static LWGEOM * lwline_split_by_mpoint ( const LWLINE *  lwgeom_in, const LWMPOINT *  blade_in  )

static

Definition at line 172 of file lwgeom_geos_split.c.

References COLLECTIONTYPE, LWLINE::flags, FLAGS_GET_M, FLAGS_GET_Z, LWMPOINT::geoms, LWMLINE::geoms, lwline_clone_deep(), lwline_free(), lwline_split_by_point_to(), lwmline_add_lwline(), lwmline_construct_empty(), LWMPOINT::ngeoms, LWMLINE::ngeoms, LWLINE::srid, and LWMLINE::type.

Referenced by lwline_split().

{
  LWMLINE* out;
  int i, j;

  out = lwmline_construct_empty(lwline_in->srid,
          FLAGS_GET_Z(lwline_in->flags),
          FLAGS_GET_M(lwline_in->flags));
  lwmline_add_lwline(out, lwline_clone_deep(lwline_in));

  for (i=0; i<mp->ngeoms; ++i)
  {
    for (j=0; j<out->ngeoms; ++j)
    {
      lwline_in = out->geoms[j];
      LWPOINT *blade_in = mp->geoms[i];
      int ret = lwline_split_by_point_to(lwline_in, blade_in, out);
      if ( 2 == ret )
      {
        /* the point splits this line,
         * 2 splits were added to collection.
         * We'll move the latest added into
         * the slot of the current one.
         */
        lwline_free(out->geoms[j]);
        out->geoms[j] = out->geoms[--out->ngeoms];
      }
    }
  }

  /* Turn multiline into collection */
  out->type = COLLECTIONTYPE;

  return (LWGEOM*)out;
}

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