API Reference > imodeljs-common > Geometry > AffineTransformProps AffineTransformProps Interface The equations are: X1 = a1X + a2Y + TranslationX Y1 = b1X + b2Y + translationY An affine representing no transformation will have: a1 = 1.0, a2 = 0.0, b1 = 0.0, b2 = 1.0. Implemented by AffineTransform Properties Name Type Description a1 number A1 value as defined in global comment. a2 number A2 value as defined in global comment. b1 number B1 value as defined in global comment. b2 number B2 value as defined in global comment. translationX number The X post translation translationY number The Y post-translation Defined in core/common/src/geometry/Projection.ts Line 76 Last Updated: 11 June, 2024