动画常量(Animation Constants)
循环模式
THREE.LoopOnce THREE.LoopRepeat THREE.LoopPingPong
插值模式
THREE.InterpolateDiscrete THREE.InterpolateLinear THREE.InterpolateSmooth
结束模式
THREE.ZeroCurvatureEnding THREE.ZeroSlopeEnding THREE.WrapAroundEnding
THREE.LoopOnce THREE.LoopRepeat THREE.LoopPingPong
THREE.InterpolateDiscrete THREE.InterpolateLinear THREE.InterpolateSmooth
THREE.ZeroCurvatureEnding THREE.ZeroSlopeEnding THREE.WrapAroundEnding