CGTalk > Software Specific Forums > Maxon Cinema 4D
Login register
Thread Closed share thread « Previous Thread | Next Thread »  
 
Thread Tools Search this Thread Display Modes
Old 11-09-2004, 02:07 AM   #1
theGuest
Know-it-All
 
theGuest's Avatar
Website & Graphics Designer / Musician
 
Join Date: Apr 2003
Posts: 316
Extrude along a path... CAN'T DO IT!?

Sorry if this isn't posted in the correct Board.

Guys i need some help please with a problem i'm having, whereby i need to create an incremental extrude along a path/spline. I can't seem to get the results i want... in fact... i can't get ANY results at all for this.

Here's the rundown...
I'm creating a basic animation of a welding torch burning through a wall of sorts, blowing sparks forward toward the viewer. The effect i need assistance with is the part whereby the weld leaves a hot trail of cut material. Get what i mean? The torch burns through the opposite side of the wall and should leave a path where the wall has been cut, and is slightly red hot, leaving a visible trail of where the torch has been. The effect of the glowing path must follow right behind the arc weld as it moves along the spline path.

My idea...
Extrude a very thin illuminated cylinder along the same spline as the torch is following, positioning it just behind the torch light. As the cylinder get's extruded incrementally it appears to create the effect of being the cut line in the wall.

Problem...
I've tried Extruding along the spline that the arc weld follows, i've also tried Piping and Sweeping... all with no results at all. Is it really so hard to extrude/sweep a circle spline or cylinder shape along a spline, 'incrementally', and record it? I don't know?! I'm stuck here!

Can anyone help me understand this effect? Please?

Thank you for you time.

__________________
photoshopgurus.com

Last edited by theGuest : 11-09-2004 at 02:12 AM.
 
Old 11-09-2004, 05:19 AM   #2
AdamT
oh ... what?
 
AdamT's Avatar
Adam Trachtenberg
Modeler, Animator, Attorney
3D Anvil
Miami, USA
 
Join Date: Jun 2002
Posts: 10,464
Hard to say what the problem is without more info. It's a pretty basic operation--just animate the growth parameter of the sweepNURBS. Possible problems:

* the axis of your profile spline (circle) isn't on the XY plane (i.e., the Z axis must point towards the direction of travel along the spline);
* err, that's all I can think of.
 
Old 11-10-2004, 08:34 AM   #3
theGuest
Know-it-All
 
theGuest's Avatar
Website & Graphics Designer / Musician
 
Join Date: Apr 2003
Posts: 316
Yeah, that's what i thought too... this is a fairly simple operation. I just can't get it to work for some reason. DOH!

Quote:
the Z axis must point towards the direction of travel along the spline
Hey never thought of that. I'll give that a go and see if it flies.

Thanks for your time Adam.
__________________
photoshopgurus.com
 
Old 01-19-2006, 08:00 PM   #4
CGTalk Moderation
Lord of the posts
CGTalk Forum Leader
 
Join Date: Sep 2003
Posts: 1,066,481
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
__________________
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
 
Thread Closed share thread


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 08:14 AM.


Powered by vBulletin
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.