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Are both or neither Axis and RefDirection required for IfcAxis2PlacementLinear #731

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RickBrice opened this issue Nov 14, 2023 · 1 comment
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Are both or neither Axis and RefDirection required for IfcAxis2PlacementLinear #731

RickBrice opened this issue Nov 14, 2023 · 1 comment

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@RickBrice
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IfcAxis2Placement3D is clear that either both Axis and RefDirection are either both provided or neither are provided. IfcAxis2PlacementLinear does not state such a requirement. Should it?
@aothms aothms mentioned this issue Nov 15, 2023
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@RickBrice RickBrice mentioned this issue Nov 15, 2023
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@RickBrice RickBrice mentioned this issue Jul 21, 2024
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@RickBrice
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Per discussion here jwouellette/TPF-5_372-Unit_Test_Suite#15 (comment) IfcAxis2PlacementLinear is different than its siblings and there are 4 valid options

  1. Both Axis and RefDirection provided
  2. Both Axis and RefDirection omitted
  3. Axis provided, RefDirection omitted
  4. RefDirection provided, Axis omitted.

The IfcAxis2PlacementLinear.Location.BasisCurve provides an extra piece of information that IfcAxis2Placement3D doesn’t have which allows for only Axis to be provided.

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@RickBrice