splines from .txt files

[Jake]

Try something like this (not tested, but may work):

Code:

public class readTXT : MonoBehaviour {
    public CurvySpline Spline;
    public TextAsset track;
    
    public void ReadPoints()
   {
     Spline.Clear();
     string[] dataLines = track.text.Split('\n');
        List<Vector3>Points= new List<Vector3>();
        int lineNum = 0;
        foreach (string line in dataLines)
        {
            string[] vec3string=line.Split(' ');
            Points.Add(new Vector3(float.Parse(vec3string[0]),float.Parse(vec3string[1]),float.Parse(vec3string[2])));
        }

        Spline.Add(Points);
   }
}

[CustomEditor( typeof( readTXT ) )]
public class Read : Editor
{
    public readTXT Target { get { return target as readTXT;}}
    
    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI ();
        EditorGUILayout.LabelField ( "Spine Reader" );
        if( GUILayout.Button ( "READ!"))
            Target.ReadPoints();
    }
    
}

Also, a good idea is to name and capitalize classes properly (almost everyone would name "readTXT" ReadTxt, or even better something like FileToSpline, which is more descriptive).