API Reference > geometry-core > CartesianGeometry > Matrix3d > testPerpendicularUnitRowsAndColumns testPerpendicularUnitRowsAndColumns Method Test if all rows and columns are length 1 and are perpendicular to each other. (I.e. the matrix is either a pure rotation with uniform scale factor of 1 or -1) testPerpendicularUnitRowsAndColumns(): boolean Returns - boolean Defined in core/geometry/src/geometry3d/Matrix3d.ts Line 2227 Last Updated: 13 June, 2024