.. _auto_curves_pre_post_crash:

*COMPUTE THE PRE-POST CRASH USING COORDINATES*
==============================================

Computes pre- and post-crash positions by transforming point coordinate time-histories from a global frame into a local coordinate system defined by three reference nodes. Use this worker to derive crash-event kinematics (e.g., intrusion, displacement) relative to a vehicle-fixed frame.

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

Classification: **process**.

Tagged: ``coordinate_transform``, ``crash``, ``intrusion``, ``kinematics``, ``local_frame``, ``pre_post_crash``, ``reference_nodes``, ``time_history``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - RN1XC
     - ref_node1xy_zcoordinates
     - vector
     - —
     - 
     - Origin of the local coordinate system — XYZ coordinates (3-component vector) of Reference Node 1; defines where the local frame is anchored.
   * - RN2XC
     - ref_node2xy_zcoordinates
     - vector
     - —
     - 
     - XYZ coordinates of Reference Node 2; together with RN1 this defines the positive X-axis direction of the local frame.
   * - RN3XC
     - ref_node3xy_zcoordinates
     - vector
     - —
     - 
     - XYZ coordinates of Reference Node 3; defines the XY-plane of the local frame (must not be collinear with RN1–RN2).
   * - Points  X Coordinates
     - points_xcoordinates
     - vector
     - —
     - 
     - X-coordinate time-history (or combined XYZ time-history) of the point to be transformed into the local frame; if XYZ is packed here, the Y and Z inputs may be left empty.
   * - Points  Y Coordinates
     - points_ycoordinates
     - vector
     - —
     - 
     - Y-coordinate time-history of the point to be transformed; optional when full XYZ is supplied via the X-coordinates input.
   * - Points Z Coordinates
     - points_zcoordinates
     - vector
     - —
     - 
     - Z-coordinate time-history of point to be transformed to local. Optional if XYZ is provided in X   <a class='btn btn-xs btn-default' target='_blank' href='https://www.d3view.com/docs/master/workflows/Glossary.html#curveinput'> <i class='fa fa-external-link'> </i> View more </a>
   * - Plane Type
     - plane_type
     - string
     - xy
     - 
     - Scale the y values by this number. Useful to change thew view vector
   * - Scale X
     - scale_x
     - scalar
     - 1.0
     - 
     - 
   * - Scale Y
     - scale_y
     - scalar
     - 1.0
     - 
     - Scale the y values by this number. Useful to change thew view vector
   * - Plane Type
     - include_type
     - string
     - no
     - 
     - Determine the Plane for the resulting curve.
   * - Centerline Coordinate
     - center_line_coord
     - scalar
     - 0.0
     - 
     - Centerline coordiantes
   * - Offset
     - offset
     - scalar
     - 0.0
     - 
     - Offset to the coordinates
   * - Maximum Type
     - max_type
     - scalar
     - xmax
     - 
     - Maximum type while sorting the extracted data

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_pre_post_crash_output_1
     - curves_pre_post_crash_output_1
     - vector
     - Transformed coordinate time-history of the input point expressed in the local (vehicle-fixed) frame, representing the pre-to-post crash displacement or position curve.

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

- data.curve.transform
- data.units
- engineering.crash.dynamics

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

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_pre_post_crash</code>. Schema hash: <code>723287a13ddf</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>