IFC 4.3.0.1 (IFC4X3) development

# 4.7.1.2.4 Cosine Spiral Transition Segment

The cosine spiral transition segment is a special case of a spiral where the curvature rate of change is a cosine function and the terms are dependent on the length L measured from the inflection point. The parameter value is defined as the deflection i.e. bearing angle &Theta.

The values of its individual terms dependent on segment length L: CosineTerm = L Constant = 1

The following diagram shows the generic classes and relationships used when applying this concept.