[−][src]Function spatialite_sys::gaiaGeometryUnion_r
pub unsafe extern "C" fn gaiaGeometryUnion_r(
p_cache: *const c_void,
geom1: gaiaGeomCollPtr,
geom2: gaiaGeomCollPtr
) -> gaiaGeomCollPtr
Spatial operator: Union
\param p_cache a memory pointer returned by spatialite_alloc_connection() \param geom1 the first Geometry object \param geom2 the second Geometry object
\return the pointer to newly created Geometry object representing the geometry Union of both input Geometries: NULL on failure.
\sa gaiaGeometryUnion, gaiaFreeGeomColl, gaiaUnaryUnion, gaiaUnionCascaded
\note you are responsible to destroy (before or after) any allocated Geometry, this including any Geometry returned by gaiaGeometryUnion_r()\n reentrant and thread-safe.
\remark \b GEOS support required.