Re: Linking Camera to Fractal Noise

So I posted this to the Media Motion list, but I wanted to make sure that it went up here as well. The way I usually link fractal noise with the camera is by using a 3D null as a reference point for the offset turbluence, scale and rotation of the fractal noise. Those expressions are below. "Target" is the 3D Null layer.

For Offset Turbulence:

l = thisComp.layer("Target");
fromComp(l.toComp(l.anchorPoint));

For Scale:

c = thisComp.activeCamera;
l = thisComp.layer("Target");
pc = c.toWorld([0,0,0]);
pl = l.toWorld(l.anchorPoint);
value * c.cameraOption.zoom / length(pl, pc);

For Rotation:

l = thisComp.layer("Target");
v = l.toCompVec([1,0,0]);
radiansToDegrees(Math.atan2(v[1], v[0]));


Darby Edelen

NVIDIA
Santa Clara, CA