test_self_intersection_xldtest_self_intersection_xldTestSelfIntersectionXldTestSelfIntersectionXldtest_self_intersection_xld (Operator)

Name

test_self_intersection_xldtest_self_intersection_xldTestSelfIntersectionXldTestSelfIntersectionXldtest_self_intersection_xld — Test XLD contours or polygons for self intersection.

Signature

test_self_intersection_xld(XLD : : CloseXLD : DoesIntersect)

Description

test_self_intersection_xldtest_self_intersection_xldTestSelfIntersectionXldTestSelfIntersectionXldTestSelfIntersectionXldtest_self_intersection_xld tests whether the input contours or polygons in XLDXLDXLDXLDXLDxld intersect or touch themselves. The output array DoesIntersectDoesIntersectDoesIntersectDoesIntersectdoesIntersectdoes_intersect contains a 1 if the corresponding input contour or polygon intersects or touches itself and 0 otherwise.

If the input parameter CloseXLDCloseXLDCloseXLDCloseXLDcloseXLDclose_xld is set to 'true'"true""true""true""true""true", open contours or polygons are closed before the check is performed by simply connecting the first and the last contour or polygon point with a line segment.

Attention

A contour or polygon touches itself if a contour or polygon point lies exactly on a contour or polygon segment. However, whether a point lies exactly on a contour or polygon segment or not can practically not be decided because of numerical reasons.

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

XLDXLDXLDXLDXLDxld (input_object) xld(-array) → object

Input contours or polygons.

CloseXLDCloseXLDCloseXLDCloseXLDcloseXLDclose_xld (input_control) string → (string)

Should the input contours or polygons be closed first?

Default: 'true' "true" "true" "true" "true" "true"

List of values: 'false'"false""false""false""false""false", 'true'"true""true""true""true""true"

DoesIntersectDoesIntersectDoesIntersectDoesIntersectdoesIntersectdoes_intersect (output_control) number(-array) → (integer)

1 for contours or polygons with self intersection and 0 otherwise.

Module

Foundation

Operators