title: Build Circle from 3 Points in 3D space implementation in C or C++
body: <p>We have 3(three) xyz points that define a circle in 3D space, this circle needs to be converted into a polyline(for further rendering). I'm looking for a ready C or C++ function or free library that can do the job.</p>
  
  <p>Don't understand why <a href="https://stackoverflow.com/questions/13915738/conversion-of-a-3-point-3d-ircle-into-a-polyline-implementation-in-c-or-c">this</a> was closed. And I can't even answer my own question there. Shame on you guys. But you will not stop the knowledge spreading! </p>