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A nifty way of drawing a mask, it’s automated
If you’ve got a rather complex shape to mask you can use the Vegas plugin to draw it.
Scale your object up so that it fits in a 1480 X 960 comp that’s 5 seconds long. (THE LARGER IMAGE MEANS A MORE ACCURATE RESULT)
Throw the vegas plugin on it.
Change the blend mode to transparent
Set the number of segments to 1 and the length to 1000 and you’ll see your shape (MAKE SURE EVERYTHING LOOKS KOSHER)
Keyframe the the vegas rotation to make one revolution
Set the length to .0001 and you’ll see a dot that traces your shape
If there are holes in your shape set vegas to render selected contours and do one contour at a timePre-render, Vegas is a RAM hog
Motion track the dot on the prerendered footage
Apply the motion track to a null and copy the position keyframes
Paste the keyframes onto a mask shape (YOU’LL NEED TO CLOSE THE MASK)It’s quick. Not to great for sharp corners but not terrible.
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“Life Should Come With Backround Music”
-Brown Sugar Studios- -
3 Replies
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woh
gr8888 idea… kudos tyler..
good work.. and
thanx for sharing..aroonz
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Sounds like sort of a lot of work to get something AE already does for you.
Is this somehow superior to just using Layer>Auto-Trace? That’s totally automated, and you can do it for every frame in your work area, if you so desire.
Or am I simply missing something here?
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