• Adobe After Effects Expressions

  Orient Along Path – How to avoid the flips?

  Posted by Rami Vered on October 30, 2010 at 10:00 am

  Hi All,

  Does anyone know how to apply “orient along path” without having those flips on the z axis???

  Basically, I need something that’s like Dan Ebbert’s “Auto-Orient Y Only” (https://www.motionscript.com/design-guide/auto-orient-y-only.html) but for orienting along the motion path rather than orienting towards the camera.

  Having researched this a bit, it seems like others have already encountered this flipping issue when using “orient along path” but I didn’t find any solution…

  More descriptions of the this problem –
  https://forums.adobe.com/message/1791571?tstart=0
  https://forums.creativecow.net/thread/2/979175

  Chris Wright replied 15 years, 10 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Chris Wright

  October 30, 2010 at 10:21 pm

  this might work, it’s another way to orient to path.
  the box you want to orient to null’s bezier path looks like this.

  //position data
  thisComp.layer(“Null 1”).transform.position

  //rotation data
  v=thisComp.layer(“Null 1”).transform.position.velocity;
  radiansToDegrees(Math.atan2(v[1],v[0]))

  //////////

  if that doesn’t work, you’ll have to use a dummy system.
  name your rectangle “box” and paste this in rotation of the arrow. this will always auto orient to the layer being called to.

  follow2 = “box”
  diff = sub(position,this_comp.layer(follow2).position);
  (Math.atan2(diff[1],diff[0]) * 180/Math.PI) + 180

  https://technicolorsoftware.hostzi.com/

Reply to this Discussion! Login or Sign Up