sqlite3_rtree_geometry_callback
fn
int sqlite3_rtree_geometry_callback(
sqlite3 * db,
const(char) * zGeom,
int function (sqlite3_rtree_geometry *, int nCoord, double * aCoord, int * pRes) xGeom,
void * pContext
)Register a geometry callback named zGeom that can be used as part of an R-Tree geometry query as follows:
SELECT ... FROM <rtree≥ WHERE <rtree col≥ MATCH $zGeom(... params ...)