Point along Spline

[Ian@MrsWordsmith]

Hello, 
   I am really enjoying this tool. 

  Sorry for the question, perhaps there is something I am missing in the logic of how splines work. 

  What I am trying to do is place a debug gizmo along the spline at a normalised value. 

  Something like; 

Code:

Gizmos.DrawSphere( thisSpline.InterpolateByDistance(speedTriggers[i].distance), 1);

Where distance is a value between 0,1. 

Regards,
Ian