API Reference > geometry-core > CartesianGeometry > YawPitchRollAngles > toMatrix3d toMatrix3d Method Expand the angles into a (rigid rotation) matrix. The returned matrix is "rigid" -- unit length rows and columns, and its transpose is its inverse. The "rigid" matrix is always a right handed coordinate system. toMatrix3d(result?: Matrix3d): Matrix3d Parameter Type Description result Matrix3d optional pre-allocated Matrix3d Returns - Matrix3d Defined in core/geometry/src/geometry3d/YawPitchRollAngles.ts Line 124 Last Updated: 13 June, 2024