Function spatialite_sys::gaiaRingCentroid

pub unsafe extern "C" fn gaiaRingCentroid(
    ring: gaiaRingPtr, 
    rx: *mut f64, 
    ry: *mut f64
)

Determines the Centroid for a Ring object

\param ring pointer to Ring object. \param rx on completion this variable will contain the centroid X coordinate. \param ry on completion this variable will contain the centroid Y coordinate.

\sa gaiaGeomCollCentroid

\remark internal method: doesn't require any GEOS support.