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IfcTransitionCode

Definition from ISO/CD 10303-42:1992: This type conveys the continuity properties of a composite curve or surface. The continuity referred to is geometric, not parametric continuity. For example, in ContSameGradient the tangent vectors of successive segments will have the same direction, but may have different magnitude.

NOTE Corresponding STEP type: transition_code, please refer to ISO/IS 10303-42:1994, p. 14 for the final definition of the formal standard.
HISTORY New Type in IFC Release 1.0

transition code

Figure quoted from ISO/CD 10303-42:1992, p. 55

ENUMERATION

EXPRESS specification:

TYPE IfcTransitionCode = ENUMERATION OF
( DISCONTINUOUS,
CONTINUOUS,
CONTSAMEGRADIENT,
CONTSAMEGRADIENTSAMECURVATURE);
END_TYPE;

References (1):

Name Type Referred through Express-G
IfcCompositeCurveSegment Entity
Attribute 'Transition'
Diagram 6