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Changing Parameters based on Distance from Camera?
Thanks to the previous help on these forums I’ve got a ring of layers orbiting around a center null. Because they are parented, on orbit, their position doesn’t change.
I’d like to create an expression that can modify lets say opacity and a fast blur based on each layers position from the camera. The camera is stationary and the farther away from the camera (fixed point is max distance) I would like the more transparent and more blurry.
DOF works, although the blur isn’t as nice as a gaussian or fast blur would be so I’m thinking of using that instead and turning DOF off.
Anyone have a starting point for me to mess around with?
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2 Replies
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Here’s an example for opacity. You’ll need to adjust the parameters to fit your situation:
minDist = 600;
maxDist = 800;
minOpacity = 30;
maxOpacity = 100;d = length(toWorld(anchorPoint),thisComp.activeCamera.position);
linear(d,minDist,maxDist,maxOpacity,minOpacity)Dan
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[todd] “DOF works, although the blur isn’t as nice as a gaussian or fast blur would be”
Or a Box Blur for that matter (;
I’d stay away from Gaussian Blurs, they’re not that pretty and they take a lot more time to render.
A Box Blur with iterations at 3 or 4 is almost exactly the same as a Fast Blur, but it gives you the ability to fine tune the blur for your needs (fewer iterations = faster render, more boxy blur, more iterations = longer render, less boxy blur)!
Darby Edelen
DVD Menu Artist
Left Coast Digital
Aptos, CA
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