I have two Point3D classes that define an object with x,y,z coordinates. These two points define a line-segment in 3D space. I want to extend the line-segment a given distance from one of the end-points and then determine the coordinates of the line segment's new endpoint. Are there 3D namespaces in .NET Framework 4.8 that would help me to do that, and if so, in what DLLs are they found?
I have included a reference to PresentationCore and my class is using System.Windows.Media.Media3D but the Vector3D constructor is not accepting three arguments, as shown here in the Microsoft documentation.