geometry_project_geometry()

Datum geometry_project_geometry

(

PG_FUNCTION_ARGS

)

Definition at line 2622 of file lwgeom_functions_basic.c.

{
        GSERIALIZED *geom1, *geom2, *geom3;
        LWPOINT *lwpoint1, *lwpoint2, *lwpoint3;
        LWGEOM *lwgeom1, *lwgeom2, *lwgeom3;
        double distance;
 
        geom1 = PG_GETARG_GSERIALIZED_P(0);
        geom2 = PG_GETARG_GSERIALIZED_P(1);
        distance = PG_GETARG_FLOAT8(2);
 
        lwgeom1 = lwgeom_from_gserialized(geom1);
        lwpoint1 = lwgeom_as_lwpoint(lwgeom1);
        lwgeom2 = lwgeom_from_gserialized(geom2);
        lwpoint2 = lwgeom_as_lwpoint(lwgeom2);
 
        if (!(lwpoint1 && lwpoint2))
                lwpgerror("Arguments must be POINT geometries");
 
        if (lwgeom_is_empty(lwgeom1) || lwgeom_is_empty(lwgeom2))
                PG_RETURN_NULL();
 
        if (lwpoint_same2d(lwpoint1, lwpoint2))
                PG_RETURN_POINTER(geom2);
 
        lwpoint3 = lwpoint_project_lwpoint(lwpoint1, lwpoint2, distance);
        lwgeom3 = lwpoint_as_lwgeom(lwpoint3);
        geom3 = geometry_serialize(lwgeom3);
 
        PG_RETURN_POINTER(geom3);
}

References distance(), lwgeom_as_lwpoint(), lwgeom_from_gserialized(), lwgeom_is_empty(), lwpoint_as_lwgeom(), lwpoint_project_lwpoint(), and lwpoint_same2d().

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