enum TangentMode
{
Auto = 10,
FreeSmooth = 0,
Flat = 0,
Broken = 1,
//LeftTangent和RightTangent一起設置需要與運算 l | r
LeftTangent_Free = 0x001,
LeftTangent_Linear = 0x101,
LeftTangent_Constant = 0x111,
RightTangent_Free = 0x00001,
RightTangent_Linear = 0x10001,
RightTangent_Constant = 0x11001
}