CurveTangent Enumeration

Specifies different tangent types to be calculated for CurveKey points in a Curve.

Namespace: Microsoft.Xna.Framework
Assembly: Microsoft.Xna.Framework (in microsoft.xna.framework.dll)

Syntax

public enum CurveTangent

Members

	Member name	Description
	Flat	A Flat tangent always has a value equal to zero.
	Linear	A Linear tangent at a CurveKey is equal to the difference between its Value and the Value of the preceding or succeeding CurveKey. For example, in Curve MyCurve, where i is greater than zero and (i + 1) is less than the total number of CurveKeys in MyCurve, the linear TangentIn of MyCurve.Keys[i] is equal to: ( MyCurve.Keys[i].Value - MyCurve.Keys[i - 1].Value ) Similarly, the linear TangentOut is equal to: ( MyCurve.Keys[i + 1].Value - MyCurve.Keys[i].Value.)
	Smooth	A Smooth tangent smooths the inflection between a TangentIn and TangentOut by taking into account the values of both neighbors of the CurveKey. The smooth TangentIn of MyCurve.Keys[i] is equal to: ( ( MyCurve.Keys[i + 1].Value - MyCurve.Keys[i - 1].Value ) * ( ( MyCurve.Keys[i].Position - MyCurve.Keys[i - 1].Position ) / ( MyCurve.Keys[i + 1].Position - MyCurve.Keys[i-1].Position ) ) ) Similarly, the smooth TangentOut is equal to: ( ( MyCurve.Keys[i + 1].Value - MyCurve.Keys[i - 1].Value ) * ( ( MyCurve.Keys[i + 1].Position - MyCurve.Keys[i].Position ) / ( MyCurve.Keys[i + 1].Position - MyCurve.Keys[i - 1].Position ) ) )

See Also

Reference

Microsoft.Xna.Framework Namespace

Platforms

Xbox 360, Windows XP SP2, Windows Vista