API Reference > imodeljs-common > Geometry > Helmert2DWithZOffset Helmert2DWithZOffset Class An affine transformation with an additional Z Offset. The equations are: given a = scale * cos(rotation) and b = scale * sin(rotation) X = a * x - b * y + translationX Y = b * x + a * y + translationY Z = z + translationZ Note that the class only implements the definition and not the operation. Implements Helmert2DWithZOffsetProps Methods Name Description constructor(data?: Helmert2DWithZOffsetProps): Helmert2DWithZOffset equals(other: Helmert2DWithZOffset): boolean Compares two Helmert2DWithZOffset objects applying a minuscule tolerance. toJSON(): Helmert2DWithZOffsetProps Creates a JSON from the Helmert Transform definition fromJSON(data: Helmert2DWithZOffsetProps): Helmert2DWithZOffset Static Creates an Helmert Transform from JSON representation. Properties Name Type Description rotDeg number The rotation in the trigonometric (CCW) direction in degrees. scale number The scale. translationX number The X post translation translationY number The Y post-translation translationZ number The Z post-translation or Z offset Defined in core/common/src/geometry/AdditionalTransform.ts Line 43 Last Updated: 11 June, 2024