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Wiggle write-on with sawtooth type line
I’m not even sure what type of a wave this would be called, but it looks like the triangle function of wave warp with a bunch of wiggle.
I’m curious if there is an expression that would work with Write-On to do basically the same thing here? I played around with wiggle on Y, but it’s all curvy.
Jason Jantzen
vimeo.com/jasonj -
2 Replies
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Here’s is a possibility for regularly spaced samples along the x-axis (controlled by the quantity called DX: spacing in pixels between samples).
I can’t check the expression because i’m not in front of AE, hopefully there is no bug:t0 = 0; // reference time
x0 = 0; // reference x (x position of the cursor at time t0);
speedX = 100; // "cursor" will move to the right at 100px/sec
DX = 50; // one sample for y every 50 px (along x-axis)yprop = effect("y").slider; // slider control with a wiggle expression (for y position of the cursor)
y0 = 0.5*thisLayer.height; // reference y//===============================================
dx = (time-t0)*speedX;
u = dx/DX;
n = Math.floor(u);
DT = DX/speedX;[x0 + dx, y0 + linear(u, n, n+1, yprop.valueAtTime(t0+n*DT), yprop.valueAtTime(t0+(n+1)*DT))];
Xavier
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Perfect!! Thank you so much Xavier. That’s some genius expression writing without testing.
Jason Jantzen
vimeo.com/jasonj
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