[−][src]Function spatialite_sys::gaiaOffsetCurve_r
pub unsafe extern "C" fn gaiaOffsetCurve_r(
p_cache: *const c_void,
geom: gaiaGeomCollPtr,
radius: f64,
points: c_int,
left_right: c_int
) -> gaiaGeomCollPtr
Spatial operator: Offset Curve
\param p_cache a memory pointer returned by spatialite_alloc_connection() \param geom the input Geometry object \param radius the buffer's radius \param points number of points (aka vertices) to be used in order to approximate a circular arc. \param left_right if set to 1 the left-sided OffsetCurve will be returned; otherwise the right-sided one.
\return the pointer to newly created Geometry object representing the OffsetCurve of input Geometry: NULL on failure.
\sa gaiaOffsetCurve, gaiaFreeGeomColl
\note you are responsible to destroy (before or after) any allocated Geometry, this including any Geometry returned by gaiaOffsetCurve_r()\n reentrant and thread-safe.
\remark \b GEOS-ADVANCED support required.