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Attaching a line to a nulls?
Hello,
I have a comp created with Maya camera information, so I have a few null objects moving in 3D space. What I’m trying to do is have a line that attaches one end to one of the nulls position, and the other end to another nulls position. Basically I’m replacing one null with a text label, and I want a line that follows what the text is calling out (the other null). I feel like I’m overlooking something pretty basic…
BTW…Thank you to all the posters here in the forum, I don’t know how many times I’ve had something to figure out, and I’ve found the answer here.
-Diana
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2 Replies
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the beam effect will draw a line between 2 points, you can use expressions to connect each end point of the beam effect to a 3d null to effectively create a line between them.
here’s a link to dan ebbert’s site that explains how it work (his example uses the corner pin effect, but it’s basically the same):
https://www.motionscript.com/design-guide/threeD-corner-pin.html
all you need to do is create a new solid and add an expression for an end point of the beam (alt(pc)/option(mac)-click the stopwatch for a beam endpoint property) then paste this into the expression field:
target = thisComp.layer(“Null 1”);
fromComp(target.toComp(target.anchorPoint));change the name of ‘target’ to one of your nulls. then do the same procedure for the other endpoint (attaching it to the other null).
that should create a line between them (you may need to set the beam effect to draw on transparent — i’m rendering right now so i can’t double check that)
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Thank you Kevin, this is exactly what I was looking for!
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