getPoint3dz_cp()

const POINT3DZ* getPoint3dz_cp	(	const POINTARRAY *	pa,
		uint32_t	n
	)

Returns a POINT3DZ pointer into the POINTARRAY serialized_ptlist, suitable for reading from.

This is very high performance and declared const because you aren't allowed to muck with the values, only read them.

Definition at line 388 of file lwgeom_api.c.

{
        if ( ! pa ) return 0;
 
        if ( ! FLAGS_GET_Z(pa->flags) )
        {
                lwerror("getPoint3dz_cp: no Z coordinates in point array");
                return 0; /*error */
        }
 
        if ( n>=pa->npoints )
        {
                lwerror("getPoint3dz_cp: point offset out of range");
                return 0; /*error */
        }
 
        return (const POINT3DZ*)getPoint_internal(pa, n);
}

References POINTARRAY::flags, FLAGS_GET_Z, getPoint_internal(), lwerror(), and POINTARRAY::npoints.

Referenced by pointArray_to_geojson(), pointArray_toGML2(), pointArray_toGML3(), and ptarray_to_GEOSCoordSeq().

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