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Mr. Wilde
04-03-2012, 03:39 PM
Hi,

I'd like to achieve something like this:

http://newamericanpublicart.com/feet/process/Dan-Beyer---Laser-Scan-01.jpg
http://i879.photobucket.com/albums/ab357/pontiacg5_2010/ScanLaserSetup.jpg
http://www.liebich-ton.de/images/product_images/original_images/%5BLT%5DAmerican_DJ_Emerald_Scan_II__Effekt_Laser_ 176166_2.jpg
http://imgs.inkfrog.com/pix/ubuy8877/c002405_001.jpg

I thought about modeling the laser beam (whatever shape it may have). And then using a nodes to create a line where the geometry of the laserbeam intersects with the geometry of the other object.

But here's where I'm stuck.

Any ideas?

Thanks in advance,
Rob

nickdigital
04-03-2012, 04:51 PM
You could probably do this by projecting an image over your object and then moving the image.

XswampyX
04-03-2012, 05:27 PM
Use a thin line as your projected image from a spot light.

http://forums.newtek.com/attachment.php?attachmentid=103195&stc=1&d=1333495577

shrox
04-03-2012, 05:47 PM
Use a thin line as your projected image from a spot light...

Just what I was going to say.

Mr. Wilde
04-05-2012, 08:01 AM
Thanks a lot!

The problem is that I need a parallel laser beam. A line projected using a spotlight gets thicker with distance.

jeric_synergy
04-09-2012, 11:07 AM
How about a Global space luminance map layer that you animate?

OTOH, that would appear on the backside of objects also.

If the spotlight is far away, doesn't that minimize the widening?

ED: someone did a "Layout boolean" thing using Nodes (?). You could use that to generate a moving mask for later comping, and use your original idea of intersecting geometry.

shrox
04-09-2012, 11:32 AM
A distant light with a large mask object set to not seen by camera, set the light to ignore other objects than the mask and the objects scanned.

prometheus
04-09-2012, 02:27 PM
Outside of lightwave if possible, after effects and effect/generate beam.

jeric_synergy
04-09-2012, 02:35 PM
Outside of lightwave if possible, after effects and effect/generate beam.
Getting the perspective on 3d objects would be a freekin' headache.