LWGEOM_makepoint()

Datum LWGEOM_makepoint

(

PG_FUNCTION_ARGS

)

Definition at line 2109 of file lwgeom_functions_basic.c.

{
        double x,y,z,m;
        LWPOINT *point;
        GSERIALIZED *result;
 
        POSTGIS_DEBUG(2, "LWGEOM_makepoint called");
 
        x = PG_GETARG_FLOAT8(0);
        y = PG_GETARG_FLOAT8(1);
 
        if ( PG_NARGS() == 2 ) point = lwpoint_make2d(SRID_UNKNOWN, x, y);
        else if ( PG_NARGS() == 3 )
        {
                z = PG_GETARG_FLOAT8(2);
                point = lwpoint_make3dz(SRID_UNKNOWN, x, y, z);
        }
        else if ( PG_NARGS() == 4 )
        {
                z = PG_GETARG_FLOAT8(2);
                m = PG_GETARG_FLOAT8(3);
                point = lwpoint_make4d(SRID_UNKNOWN, x, y, z, m);
        }
        else
        {
                elog(ERROR, "LWGEOM_makepoint: unsupported number of args: %d",
                     PG_NARGS());
                PG_RETURN_NULL();
        }
 
        result = geometry_serialize((LWGEOM *)point);
 
        PG_RETURN_POINTER(result);
}

References geometry_serialize(), lwpoint_make2d(), lwpoint_make3dz(), lwpoint_make4d(), SRID_UNKNOWN, pixval::x, and pixval::y.

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