pub unsafe extern "C" fn dd_CheckAdjacency(
cone: dd_ConePtr,
RP1: *mut dd_RayPtr,
RP2: *mut dd_RayPtr,
adjacent: *mut dd_boolean,
)pub unsafe extern "C" fn dd_CheckAdjacency(
cone: dd_ConePtr,
RP1: *mut dd_RayPtr,
RP2: *mut dd_RayPtr,
adjacent: *mut dd_boolean,
)