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Control the size of one keyframe.

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Pavel Kaprykov
Control the size of one keyframe.
on Feb 5, 2014 at 11:21:59 am

Hello. I have a shape. Shape has a scale animation (0-100%). I created an Adjustment layer (Shapes_Control) and added the "Slider control". I wanna bind the 2nd keyframe to the "Slider Control". Shape has animation only X axis. Anyone can help me with an expression?

I'm not a native English speaker, so excuse me if I don't clearly explained.


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Matthew Talesfore
Re: Control the size of one keyframe.
on Feb 5, 2014 at 11:57:44 pm

I think I understand...

Start with your "slider" on a 'Null layer'.

Then I would attach the following expression to the scale of your circle layer.

trans = thisComp.layer("Null 1").effect("Slider Control")("Slider")+transform.scale[1];
[transform.scale[0], trans]


-Matt


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Pavel Kaprykov
Re: Control the size of one keyframe.
on Feb 6, 2014 at 7:08:37 am

It's not quite what I need.



So, I have animation. Left to right. 1st keyframe: x:0, y:100. 2nd keyframe: x:100, y:100. Animation X-axis only.
I need to bind the second keyframe to the slider control. For exemple, I put a value of 300 in the slider.
Animation should be:
1st keyframe: x:0, y:100. 2nd keyframe: x:300, y:100.
I tried your expression, but I didn't succeed :(


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Dan Ebberts
Re: Control the size of one keyframe.
on Feb 6, 2014 at 2:40:58 pm

Something more like this, I think:

x2 = thisComp.layer("Null 1").effect("Slider Control")("Slider");
x = linear(time,key(1).time,key(2).time,key(1).value[0],x2);
[x,value[1]]


Dan



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Pavel Kaprykov
Re: Control the size of one keyframe.
on Feb 6, 2014 at 2:58:44 pm

Yes, this is what I need. Perfectly works. Thank you so much.


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Pavel Kaprykov
Re: Control the size of one keyframe.
on Feb 7, 2014 at 1:34:58 pm

Hello again. I still have a few questions. Dan, your expression perfectly works. I need an expression for this scheme:

1st keyframe: x:0, y:100,
2nd keyframe: x:100, y:100,
3rd keyframe: x:100, y:100,
4th keyframe: x:0, y:100.
So, this is fade in and fade out animation. I need to bind the second and third keyframes.

Also, I have a shape that has this animation:
1st keyframe: x:20, y:0,
2nd keyframe: x:20, y:100,
3rd keyframe: x:20, y:100,
4th keyframe: x:100, y:100.
5th keyframe: X:0, y:100.
I need to bind the 3rd and 4th keyframes.
So, please explain to me how to change the expression.

And the last. If a shape has no animation, but I wanna control a size using a slider. How can I do this? Thanks.


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Dan Ebberts
Re: Control the size of one keyframe.
on Feb 7, 2014 at 5:48:21 pm

> I need to bind the second and third keyframes.

bind?



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Pavel Kaprykov
Re: Control the size of one keyframe.
on Feb 7, 2014 at 6:13:51 pm

Yes. I need to bind the 2nd and 3rd keyframes to a slider control :) Your expression for the binding of the second keyframe works, but I can't edit it. Explain to me how to do it, please :)


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Dan Ebberts
Re: Control the size of one keyframe.
on Feb 7, 2014 at 6:55:11 pm

That would look like this:

sVal = thisComp.layer("Null 1").effect("Slider Control")("Slider");

if (time < key(2).time)
x = linear(time,key(1).time,key(2).time,key(1).value[0],sVal)
else if (time < key(3).time)
x = sVal
else
x = linear(time,key(3).time,key(4).time,sVal,key(4).value[0]);
[x,value[1]]


Dan



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John Wolf
Re: Control the size of one keyframe.
on Feb 10, 2017 at 3:37:16 pm

Hi,

this is perfect:
x2 = thisComp.layer("Null 1").effect("Slider Control")("Slider");
x = linear(time,key(1).time,key(2).time,key(1).value[0],x2);
[x,value[1]]

but I need use Point Control, can you edit expresions for this? Thank you very much.

John


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