Fade in centered type on text expression

[Joel Som]

I’ve used the following expression kindly suggested by Dan Ebberts to have centered text type on:

charPerSec = 10;
idx = Math.floor(time*charPerSec);
value.substr(0,idx)

 

I’m wondering what I would need to add in order to have the words or characters fade up?

 

thanks in advance.

[Filip Vandueren]

Try copying and pasting this on your layer:

Adobe After Effects 8.0 Keyframe Data
	Units Per Second	30
	Source Width	1
	Source Height	1
	Source Pixel Aspect Ratio	1
	Comp Pixel Aspect Ratio	1
Text	Animators	Animator #1	Selectors	Range Selector #1	Start #4
	Frame		
		-1	
Text	Animators	Animator #1	Selectors	Range Selector #1	Offset #6
	Frame		
		0	
Expression Data
charPerSec = 10;
idx = (time*charPerSec);
End of Expression Data
Text	Animators	Animator #1	Selectors	Range Selector #1	Advanced	Units
	Frame		
		2	
Text	Animators	Animator #1	Properties	Opacity
	Frame	percent	
		0	
End of Keyframe Data

It will add an opacity textanimator with an expression on its range that keeps up with the sourceText getting longer. You’ll need to make sure the charPerSec is the same in both expressions.