``ALS017`` Alignment vertical segment geometric continuity - v4
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.. parsed-literal::

   001 | \@industry-practice
   002 | \@ALS
   003 | \@version4
   004 | 
   005 | Feature: ALS017 - Alignment vertical segment geometric continuity
   006 | 
   007 |   The rule verifies that there is geometric continuity between segments in an IfcGradientCurve.
   008 |   The calculated end position and tangent vector of segment `n` is compared to the provided placement of segment `n + 1`.
   009 |   A warning is emitted if the calculated difference is greater than the applicable tolerance.
   010 |   The tolerance for positional and gradient continuity is taken from the precision of the applicable geometric context.
   011 | 
   012 |   Background:
   013 | 
   014 |     :doc:`Given A model with Schema 'IFC4.3' </steps/givensattributespy_Afile_or_modelwithfieldvalues>`
   015 |     :doc:`Given An .IfcAlignment. </steps/stepsentity_selectionpy_Anentity_opt_stmt>`
   016 |     :doc:`Given Its attribute .Representation. </steps/stepsattribute_selectionpy_Itsattributeattribute>`
   017 |     :doc:`Given Its attribute .Representations. </steps/stepsattribute_selectionpy_Itsattributeattribute>`
   018 |     :doc:`Given .RepresentationType. ^is^ 'Curve3D' </steps/stepsattribute_valuepy_attributecomparison_operatorequal_or_not_equalvalue>`
   019 |     :doc:`Given All referenced instances </steps/givensentitiespy_Allreferencedinstances>`
   020 |     :doc:`Given [Its Entity Type] ^is^ 'IfcGradientCurve' </steps/stepsattribute_valuepy_attributecomparison_operatorequal_or_not_equalvalue>`
   021 |     :doc:`Given Its attribute .Segments. </steps/stepsattribute_selectionpy_Itsattributeattribute>`
   022 |     :doc:`Given [Its Entity Type] ^is^ 'IfcCurveSegment' </steps/stepsattribute_valuepy_attributecomparison_operatorequal_or_not_equalvalue>`
   023 |     :doc:`Given The values grouped pairwise at depth 3 </steps/givensvaluespy_Thevaluesgroupedpairwiseatdepthignoredd>`
   024 | 
   025 |   Scenario: Geometric continuity in position
   026 | 
   027 |     :doc:`Then Each segment must have geometric continuity in ^position^ </steps/thensalignmentpy_Eachsegmentmusthavegeometriccontinuityincontinuity_typecontinuity_type>`
   028 | 
   029 |   Scenario: Geometric continuity in vertical gradient
   030 | 
   031 |     :doc:`Then Each segment must have geometric continuity in ^vertical gradient^ </steps/thensalignmentpy_Eachsegmentmusthavegeometriccontinuityincontinuity_typecontinuity_type>`

.. rubric:: Version history

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

   * - Version
     - Tag
     - Date
     - Commit
     - Rule link
   * - v1
     - :tag:`v0.6.8`
     - 2024-09-29
     - :commit:`f9a04f0bfb23bf78d99bf4ccd407896d5b7ebce1`
     - `view <https://github.com/buildingSMART/ifc-gherkin-rules/blob/release/0.6.8/features/ALS017_Alignment-vertical-segment-geometric-continuity.feature>`_
   * - v2
     - :tag:`v0.6.11`
     - 2025-02-04
     - :commit:`ac14bdfdb4deaeb8953deb39516499e6ca7afe09`
     - `view <https://github.com/buildingSMART/ifc-gherkin-rules/blob/release/0.6.11/features/ALS017_Alignment-vertical-segment-geometric-continuity.feature>`_
   * - v3
     - :tag:`v0.7.5`
     - 2025-04-23
     - :commit:`7f35a02ee8a48dffdfc0c18cd45b7b85ad1bd9a5`
     - `view <https://github.com/buildingSMART/ifc-gherkin-rules/blob/release/0.7.5/features/rules/ALS/ALS017_Alignment-vertical-segment-geometric-continuity.feature>`_
   * - v4
     - :tag:`v0.7.7`
     - 2025-06-25
     - :commit:`113e0f246e0b5c13a2918173bc603e681b0b8701`
     - `view <https://github.com/buildingSMART/ifc-gherkin-rules/blob/release/0.7.7/features/rules/ALS/ALS017_Alignment-vertical-segment-geometric-continuity.feature>`_