THREE.LoopOnce
THREE.LoopRepeat
THREE.LoopPingPong
		
    
THREE.InterpolateDiscrete
THREE.InterpolateLinear
THREE.InterpolateSmooth
    
    
THREE.ZeroCurvatureEnding
THREE.ZeroSlopeEnding
THREE.WrapAroundEnding
    
		[link:https://github.com/mrdoob/three.js/blob/master/src/constants.js src/constants.js]