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8.9.3.14 IfcCartesianTransformationOperator2D

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AbV ⓘ

8.9.3.14.1 Semantic definition

An IfcCartesianTransformationOperator2D defines a geometric transformation in two-dimensional space.

8.9.3.14.2 Entity inheritance

8.9.3.14.3 Attributes

# Attribute Type Description
IfcRepresentationItem (2)
IfcCartesianTransformationOperator (6)
Click to show 8 hidden inherited attributes
IfcCartesianTransformationOperator2D (1)
* U LIST [2:2] OF IfcDirection

This attribute is formally derived.

IfcBaseAxis(2,SELF\IfcCartesianTransformationOperator.Axis1,
SELF\IfcCartesianTransformationOperator.Axis2,?)

The list of mutually orthogonal, normalized vectors defining the transformation matrix T. They are derived from the explicit attributes Axis1 and Axis2 in that order.

Table 8.9.3.14.E

8.9.3.14.4 Formal propositions

Name Description
Axis1Is2D

The inherited Axis1 should have (if given) the dimensionality of 2.

NOT(EXISTS(SELF\IfcCartesianTransformationOperator.Axis1)) OR
(SELF\IfcCartesianTransformationOperator.Axis1.Dim = 2)
Axis2Is2D

The inherited Axis2 should have (if given) the dimensionality of 2.

NOT(EXISTS(SELF\IfcCartesianTransformationOperator.Axis2)) OR
(SELF\IfcCartesianTransformationOperator.Axis2.Dim = 2)
DimEqual2

The coordinate space dimensionality of this entity shall be 2.

SELF\IfcCartesianTransformationOperator.Dim = 2
Table 8.9.3.14.F

8.9.3.14.5 Examples

8.9.3.14.6 Formal representation

ENTITY IfcCartesianTransformationOperator2D
SUPERTYPE OF (ONEOF
(IfcCartesianTransformationOperator2DnonUniform))
SUBTYPE OF (IfcCartesianTransformationOperator);
DERIVE
U : LIST [2:2] OF IfcDirection := IfcBaseAxis(2,SELF\IfcCartesianTransformationOperator.Axis1,
SELF\IfcCartesianTransformationOperator.Axis2,?);
WHERE
Axis1Is2D : NOT(EXISTS(SELF\IfcCartesianTransformationOperator.Axis1)) OR
(SELF\IfcCartesianTransformationOperator.Axis1.Dim = 2);
Axis2Is2D : NOT(EXISTS(SELF\IfcCartesianTransformationOperator.Axis2)) OR
(SELF\IfcCartesianTransformationOperator.Axis2.Dim = 2);
DimEqual2 : SELF\IfcCartesianTransformationOperator.Dim = 2;
END_ENTITY;

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3 contributor(s):
Last change: Improve definition split (#876) * bring back headers headers were previously removed by mistake, now bringing them back * add new lines and rename the tag add the word 'short' in it * unify newlines make exactly one newline before and two after the tag * resolving typos Because bringing back headers required to go back in time to previous version, I'm now re-resolving the issues: #861, #860, #856 by ArturTomczak on 7/16/2024, 2:07:28 PM

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8.9.3.14.7 Changelog

8.9.3.14.7.1 IFC4

  • where rule, Axis1Is2D
  • where rule, Axis2Is2D
  • where rule, DimEqual2
  • where rule, WR1
  • where rule, WR2
  • where rule, WR3