API Reference > core-geometry > CartesianGeometry > Matrix3d > createDirectionalScale

createDirectionalScale MethodStatic

Create a matrix that scales along a specified direction.

  • The scale factor can be negative.
  • A scale of -1.0 (negative one) is a mirror across the plane perpendicular to the vector.
    The matrix is I−(s−1)UUTwith U being the unit vector in the direction of the input vector.\text{The matrix is } I - (s-1) U U^T
\\ \text{with }U\text{ being the unit vector in the direction of the input vector.}

createDirectionalScale(direction: Vector3d, scale: number, result?: Matrix3d): Matrix3d

Parameter Type Description
direction Vector3d  
scale number  
result Matrix3d  

Returns - Matrix3d

Defined in

Last Updated: 20 June, 2023