API Reference > geometry-core > Numerics Numerics The Numerics classes have geometric and numeric methods used during large algorithms in other classes. Classes Name Description Map4d Map4 carries two Matrix4d which are inverses of each other. Matrix4d * A Matrix4d is a matrix with 4 rows and 4 columns. MomentData A MomentData structure exists in several levels: PlaneByOriginAndVectors4d A Plane4dByOriginAndVectors is a 4d origin and pair of 4d "vectors" defining a 4d plane. Point4d 4 Dimensional point (x,y,z,w) used in perspective calculations. SmallSystem static methods for commonly appearing sets of equations in 2 or 3 variables Type Aliases Name Description Matrix4dProps Coordinate data with Point4d numeric data as an array [x,y,z,w] Point4dProps 4d point packed in an array of 4 numbers. Last Updated: 15 June, 2021