Question

I am trying to learn lambda in C# 3, and wondering how this function would be written using lambdas:

Say you have a collection of Point3 values.

For each of these points, p:

create a new p, where .Y is:

Math.Sin ((center - p).Length * f) 

center and f are external variables to be provided to the function. Also Point3 type will have a constructor that takes x, y, z values.

Answer 1

Input collection is source, output collection is result:

IEnumerable<Point3> source = ...  IEnumerable<Point3> result = source.Select(p => new Point3(p.x, Math.Sin ((center - p).Length * f), p.z);