/// <summary>
/// Adds new columns.
/// New points of the spline are added. Their positions are calculated from their twin predecessor in the spline.
/// </summary>
/// <param name="newPoints"> Overall count of points wanted in the new spline. </param>
/// <param name="sc"> SplineComputer of the spline that is being adjusted. </param>
protected void AddColumns(int newPoints, SplineComputer sc)
{
for (int i = 0; i < newPoints; ++i)
{
int index = currentPointCount - basePointCount + 1;
var twinPoint = sc.GetPoint(index);
sc.SetPointPosition(currentPointCount, new Vector3(twinPoint.position.x + width, twinPoint.position.y, twinPoint.position.z));
sc.SetPointSize(currentPointCount, point_size);
sc.SetPointColor(currentPointCount, Color.white);
sc.SetPointNormal(currentPointCount, sc.GetPointNormal(index));
currentPointCount++;
}
}