OfMesh random vertex

  float nervousness = 0.25; // 0-1 range

  // loop over every vertex in the mesh
  for(int i = 0; i < mesh.getVertices().size(); i++ )
  {
    float x = 0.5 - ofRandomuf();
    float y = 0.5 - ofRandomuf();
    float z = 0.5 - ofRandomuf();
    
    // notice the += here. Increment the position with a value betwee -0.5 and 0.5.
    // Therefore average position of the vertex will remain constant, but it will "walk"
    mesh.getVertices().at(i) += ofVec3f( x*50*nervousness, y*25*nervousness, z*25*nervousness );
  }