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Unity 3D + After Effects .JSON file with position over time
Hey everyone!
I’m creating vídeos for mobile games and I record all the scenes on Unity 3D. I use a PS5 controller to play and Unity records the X and Y position of my analogic stick on a .json file (30 FPS – The information is record 30 times every second / Position interval of -1 and 1, being 0 the center of the stick and -1 and 1 the left, right, top and bottom max position of the stick) and it looks like this:
[{“x”:0.10917455,”y”:0.0},{“x”:0.1479061,”y”:0.0},{“x”:0.196320519,”y”:0.0}…with hundreds of lines…
All the game HUD is recreated in after effects because I have to work with different aspect ratios and better animations. I want to parent this position over time value on the .json file to an animated analogic stick I created on after effects.
I’ve been working with after effects over the past 8 years, but never used a .json file. The developer that I’m working with can format the .json anyway I want to, I just wanted to know if there’s a right way to do it, so after effects will be able to read the value and parent it to the position of my analogic stick on after effects.
Thanks!
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5 Replies
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I’d start with something like this maybe:
data = footage("test json.json").sourceData;
dataRate = 30;
idx = clamp(Math.round(time*dataRate),0,data.length-1);
x = data[idx].x;
y = data[idx].y;
[x,y] -
Thank you very much Dan. It worked like a charm!
I have one more question, the joystick is very sensitive and sometimes it flickers a lot during a diagonal movement or a slow movement. Is there a way to make the movement a little bit smoother? Maybe round the numbers, based on the next and previous frames(values), so it moves a little bit on the same path, something like this…
Thanks in advance!
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Thank you for your helpful solve, Dan!
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If you apply the expression to a slider, for example, I guess you try smoothing that result in another slider, with something like this:
s = effect("Data Slider")("Slider");
s.smooth(.2,5) -
Thanks Dan! Problem solved!
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