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Rotating Sweep Along a path

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Michel Salloum
Rotating Sweep Along a path
on Jan 29, 2018 at 9:54:22 am

Hi All,
Im trying to create a motion trail for a simple rectangle using a Sweep and a tracer.. and it works fine as long as the rectangle keep its rotation static..



if i get it to rotate along it's path, i cant get the sweep to match its rotation.. i played with rails.. but i couldn't figure it out ..




Any suggestions?

12106_motiontrails.c4d.zip


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Brian Jones
Re: Rotating Sweep Along a path
on Jan 30, 2018 at 3:23:45 am

the sweep locks it - if you can't use a null to move along the spline then rotate the rectangle in that (my quick test didn't look promising but I didn't have much time) then you might need to prebuild the shape you want then reveal it with a boole (or texture alpha or something)


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Michel Salloum
Re: Rotating Sweep Along a path
on Jan 30, 2018 at 6:04:58 am

Thank you a lot i will test that.. in theory using a null should work fine..


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Michel Salloum
Re: Rotating Sweep Along a path
on Jan 30, 2018 at 12:38:56 pm

Sadly nothing seems to work the way i expected..


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Michel Salloum
Re: Rotating Sweep Along a path
on Jan 30, 2018 at 1:02:39 pm

Also there is that flickering that show up every time i unchecked parallel movements!


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Marc Fovargues
Re: Rotating Sweep Along a path
on Jan 31, 2018 at 9:39:05 am

The flicker appears due to the tracer spline settings.
Intermediate points set to adaptive with 5 degree angle solves this.


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Marc Fovargues
Re: Rotating Sweep Along a path
on Jan 31, 2018 at 9:27:21 am

Hi, you should definitely revisit rails, they really help. Basically you duplicate your spline and offset it, like a railway track, that then helps with orientation along your original spline.

Here's a great example of that https://www.youtube.com/watch?v=3yXE7qgDJT0


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Marc Fovargues
Re: Rotating Sweep Along a path
on Jan 31, 2018 at 9:53:35 am

Here's the updated file with spline rail included.

12112_motiontrails.c4d.zip

Hope it helps


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Michel Salloum
Re: Rotating Sweep Along a path
on Jan 31, 2018 at 11:16:27 am

I can't thank you enough!
I also made the rectangle editable so i can have more control over it's trace rotation!

Thanks again ^_^


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