lwpoint_clip_to_ordinate_range()

static LWCOLLECTION * lwpoint_clip_to_ordinate_range ( const LWPOINT *  point, char  ordinate, double  from, double  to  )

inlinestatic

Clip an input POINT between two values, on any ordinate input.

Definition at line 362 of file lwlinearreferencing.c.

{
        LWCOLLECTION *lwgeom_out = NULL;
        char hasz, hasm;
        POINT4D p4d;
        double ordinate_value;
 
        /* Read Z/M info */
        hasz = lwgeom_has_z(lwpoint_as_lwgeom(point));
        hasm = lwgeom_has_m(lwpoint_as_lwgeom(point));
 
        /* Prepare return object */
        lwgeom_out = lwcollection_construct_empty(MULTIPOINTTYPE, point->srid, hasz, hasm);
 
        /* Test if ordinate is in range */
        lwpoint_getPoint4d_p(point, &p4d);
        ordinate_value = lwpoint_get_ordinate(&p4d, ordinate);
        if (from <= ordinate_value && to >= ordinate_value)
        {
                LWPOINT *lwp = lwpoint_clone(point);
                lwcollection_add_lwgeom(lwgeom_out, lwpoint_as_lwgeom(lwp));
        }
 
        return lwgeom_out;
}

References lwcollection_add_lwgeom(), lwcollection_construct_empty(), lwgeom_has_m(), lwgeom_has_z(), lwpoint_as_lwgeom(), lwpoint_clone(), lwpoint_get_ordinate(), lwpoint_getPoint4d_p(), MULTIPOINTTYPE, and LWPOINT::srid.

Referenced by lwgeom_clip_to_ordinate_range().

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