public TParam Parameter { get; set; }

Public Property Parameter As TParam
	Get
	Set

public:
property TParam Parameter {
	TParam get ();
	void set (TParam value);
}

member Parameter : 'TParam with get, set

Property Value

The parameter is normally zero at the first curve key and increases as we move along the curve.

Depending on where or how the curve is used the curve parameter could be interpreted as time (to describe when a certain point is reached) or distance (to describe the distance from the start of the curve). Other interpretations can be used as well.

Reference