.. _auto_curve_start_point:

*COMPUTE START POINT*
=====================

Extracts the first data point (x, y) of an input curve as a scalar value. Use this worker when you need to identify or pass forward the starting coordinate of a time-history or XY curve within a workflow.

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

Classification: **process**.

Tagged: ``curve``, ``scalar``, ``start_point``, ``time_history``, ``transform``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve In
     - curve_in
     - vector
     - —
     - 
     - The input XY or time-history curve (vector) from which the start point will be extracted; optional — if omitted the worker produces no output.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_start_point_output_1
     - curve_start_point_output_1
     - scalar
     - Scalar value representing the first data point of the input curve (i.e. the value at the curve's initial x-coordinate).

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

- data.curve.transform

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

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_start_point</code>. Schema hash: <code>66898d68642e</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>