Y axis movement with pause


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Y axis movement with pause
by Ian Radcliffe on Nov 2, 2009 at 12:10:43 pm

Hi
I am brand new to After Effects - working on my first project.
I am trying to create a text list that moves vertically upwards (say 15 pixels) then pauses for half a second then moves vertically again.
This action will keep looping indefinitely.

Is this something you can do with expressions, or will I have to key frame it all?

Thanks in advance for any help.

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Re: Y axis movement with pause
by Xinlai Ni on Nov 2, 2009 at 6:07:20 pm

Try the following for the position property of your text layer:

xPos = 500;  // or your own value

startY = 500;  // or your own value

deltaY = 15;

yPos = startY - Math.floor(time) * deltaY;

linear(time % 1, 0, 0.5, [xPos, yPos], [xPos, yPos - deltaY])

Xinlai Ni
Software Engineer, Google Inc.

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Re: Y axis movement with pause
by Ian Radcliffe on Nov 3, 2009 at 1:27:18 pm

Thanks Xinlai Ni - that is EXACTLY what I was after!
After I tweaked the figures it worked perfectly.
That saved me about two days worth of key framing.

Thanks again.

Ian Radcliffe
Digital Designer, Gyro:HSR

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