connect_and_holesconnect_and_holesConnectAndHolesConnectAndHolesconnect_and_holes (Operator)
Name
connect_and_holesconnect_and_holesConnectAndHolesConnectAndHolesconnect_and_holes — Number of connection components and holes
Signature
def connect_and_holes(regions: HObject) -> Tuple[Sequence[int], Sequence[int]]
def connect_and_holes_s(regions: HObject) -> Tuple[int, int]
Description
The operator connect_and_holesconnect_and_holesConnectAndHolesConnectAndHolesconnect_and_holes calculates the number of
connection components and the number of holes of
each region of RegionsRegionsRegionsregionsregions.
In the documentation of this chapter (Regions / Features), you can
find an image illustrating regions which vary in the number of their
connection components and the number of their holes.
If more than one region is passed the numerical values of the
output control parameters NumConnectedNumConnectedNumConnectednumConnectednum_connected and NumHolesNumHolesNumHolesnumHolesnum_holes
are each stored in a tuple, the position of a value in the tuple
corresponding to the position of the region in the input tuple.
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
Parameters
RegionsRegionsRegionsregionsregions (input_object) region(-array) → objectHRegionHObjectHObjectHobject
Region(s) to be examined.
NumConnectedNumConnectedNumConnectednumConnectednum_connected (output_control) integer(-array) → HTupleSequence[int]HTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Number of connection components of a region.
NumHolesNumHolesNumHolesnumHolesnum_holes (output_control) integer(-array) → HTupleSequence[int]HTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Number of holes of a region.
Result
The operator connect_and_holesconnect_and_holesConnectAndHolesConnectAndHolesconnect_and_holes returns the value 2 (
H_MSG_TRUE)
if the input is not empty.
The behavior in case of empty input (no input regions available) is
set via the operator set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>).
The behavior in case of empty region (the region is the empty set) is set via
set_system('empty_region_result',<Result>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)set_system("empty_region_result",<Result>).
Possible Predecessors
thresholdthresholdThresholdThresholdthreshold,
regiongrowingregiongrowingRegiongrowingRegiongrowingregiongrowing,
connectionconnectionConnectionConnectionconnection
Alternatives
euler_numbereuler_numberEulerNumberEulerNumbereuler_number
See also
connectionconnectionConnectionConnectionconnection,
fill_upfill_upFillUpFillUpfill_up,
fill_up_shapefill_up_shapeFillUpShapeFillUpShapefill_up_shape,
union1union1Union1Union1union1
Module
Foundation