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3d stroke with 2 xyz controls

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Joe Roz
3d stroke with 2 xyz controls
on Mar 2, 2010 at 12:19:56 pm

I want to make a 3d stroke with xyz controls for both the start point and end point - to be able to connect it to two objects with different motions. any ideas?
Trapcode 3dstroke wouldn't do the job since it's mask oriented, I though of using a motion path but had no idea how to make a stroke out of one. also thought of lightning or beam, but these don't have Z controls.
thanks ahead guys!


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Mike Park
Re: 3d stroke with 2 xyz controls
on Mar 2, 2010 at 4:23:34 pm

Are you looking to make a straight line between the two or something else? Does is need to be true 3d so you can rotate around it?


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Yotam Rozin
Re: 3d stroke with 2 xyz controls
on Mar 2, 2010 at 5:40:30 pm

it is a straight line in 3d space that has each tip connected to a different tracker with xyz data.
like a line connecting to two spheres, each with different z depths and moving on the x/y axis. each tip of the line is connected to each sphere. hope my intentions are clear.


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Mike Park
Re: 3d stroke with 2 xyz controls
on Mar 2, 2010 at 7:46:02 pm

Maybe I am just having brain issues or am too stuck on Particular, but the way I think of handling this would be to use 2 nulls, put a lookat expression on orientation of the one looking at the other. Then I would create a solid and put Particular on it. Link the xy and z position of the emitter to the xyz of the null with the lookat expression and then crank up the speed and pps until you get a straight line. I cant think of any way to do a true 3d line with 2 xyz animated positions.

Now, if you only need a 2d line between 3d points, and you dont need to rotate a camera around the line and dont need the line width to change in perspective as it goes back in z space, you could translate the 3d positions of your nulls to 2d screen coordinates and then use the beam effect.


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