2015年2月2日 星期一

RedGiant的Particular系統如何跟隨路徑?

教學影片:Red Giant QuickTip #25: Aligning Particular Motion Paths


  1. 上Layer > New > Light (Point)命名為Motion Path 1
  2. 上Layer > New > Solid 並加入Particular
  3. 在Particular的參數裡,找Physics > Air > Motion Path 下拉選單找1
    它就會自動配到你剛剛命名的Motion Path 1
  4. 位置可能會有偏差,想要完全跟隨路徑的話,要做以下動作:
    Patricular > Emitter > Position XY 用小豬尾巴(Expression Pick)拖到
    Motion Path的Position
    同理,再把Position Z 拖到Path的 Position Z

    *此時是生成點的跟隨
  5. 此時Position XY的表達式應為
    temp = thisComp.layer("Motion Path 1").transform.position;[temp[0], temp[1]]
    改為
    temp = thisComp.layer("Motion Path 1").transform.position.valueAtTime(0);[temp[0], temp[1]]
  6. Position Z的表達式應為
    thisComp.layer("Motion Path 1").transform.position[2]
    改為
    thisComp.layer("Motion Path 1").transform.position.valueAtTime(0)[2]


But我更換成Sprite時還是有問題orzzzzzz

3 則留言:

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