.. _auto_curves_get_threshold_intersections:

*COMPUTE INTERSECTIONS OF A CURVE WITH THE THRESHOLD VALUES*
============================================================

Computes the x-axis intersection points where a curve crosses a lower and/or upper threshold (limit) curve. Use this worker to identify when a signal exceeds defined bounds, such as corridor violations or threshold crossings in time-history data.

When to use
-----------

Classification: **process**.

Tagged: ``corridor``, ``crossing``, ``curve``, ``intersections``, ``limit``, ``threshold``, ``time-history``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - 
     - The primary input curve (x/y vector) whose values are tested against the threshold limits; accepts a CurveGroup, in which case only the first curve is used.
   * - Upper Limit Curve
     - upperlimit_curve
     - vector
     - —
     - 
     - Optional upper threshold curve (x/y vector) defining the maximum acceptable boundary; intersections are computed where the primary curve crosses above this limit.
   * - Lower Limit Curve
     - lowerlimit_curve
     - vector
     - —
     - 
     - Optional lower threshold curve (x/y vector) defining the minimum acceptable boundary; intersections are computed where the primary curve crosses below this limit.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - curves_get_threshold_intersections_output_1
     - curves_get_threshold_intersections_output_1
     - dataset
     - Dataset containing the x-axis coordinates (and associated metadata) of all points where the input curve intersects the upper and/or lower limit curves.

Disciplines
-----------

- data.curve.pair

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curves_get_threshold_intersections <https://www.d3view.com/api/workflow/example?id=curves_get_threshold_intersections>`_

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_get_threshold_intersections</code>. Schema hash: <code>220f0a3db416</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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