[−][src]Function spatialite_sys::gaiaGeometryDifference
pub unsafe extern "C" fn gaiaGeometryDifference(
geom1: gaiaGeomCollPtr,
geom2: gaiaGeomCollPtr
) -> gaiaGeomCollPtr
Spatial operator: Difference
\param geom1 the first Geometry object \param geom2 the second Geometry object
\return the pointer to newly created Geometry object representing the geometry Difference of both input Geometries: NULL on failure.
\sa gaiaGeometryDifference_r, gaiaGeometrySymDifference, gaiaFreeGeomColl
\note you are responsible to destroy (before or after) any allocated Geometry, this including any Geometry returned by gaiaGeometryDifference()\n not reentrant and thread unsafe.
\remark \b GEOS support required.