kleines Problem mit dem Splinekurvenbeispiel aus dem Handbuch

//call camera_path(""); to let the camera run along a path in the level

function camera_path(pathname)
{
   // create a dummy path entity

   me = ent_create(NULL,nullvector,NULL);
   path_set(me,pathname);
   var dist = 0;
   var vLastPos[3];
   var vDir[3];

   while(1) 
   {
      // place the camera on the path
      path_spline(me,camera.x,dist);
      dist += 5*time_step;

      // let the camera look ahead
      vec_diff(vDir,camera.x,vLastPos);
      vec_to_angle(camera.pan,vDir);
      vec_set(vLastPos,camera.x);

      wait(1);
   }
}