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Old 9th Dec 2007, 05:57 PM   #1
TheGreatRaja
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Default LightWave - Splines 101 - A Descent Into Madness

Splines seem to strike fear into Lightwavers for some odd reason. Once you get a handle on how to make them spline patching can be just as easy as polygon modeling.

Here we see for basic points


Now we grab Two of them and Press Ctrl-p and we have this (when selected)


The Triangle is the anchor point
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Old 9th Dec 2007, 06:05 PM   #2
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Now select each pair of points and make the splines.
You should have 4 splines, each spline connecting two points
Like Below


As you can see there is a diamond shaped anchor point in each corner
Then press Ctrl-F, one of two things will happen

First you should see this


If the splines are not formed correctly you will get this
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Old 9th Dec 2007, 06:27 PM   #3
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that error is caused by points not being welded.
Basically go to where two spline cross and weld any offending points
Each corner should have just one point.

If the Patch is formed Correctly you should get this
(with the default Parameters)


Splines can be any number of points and any shape


The above has four splines and if you try patch it you'll get the above error unless you weld them at these points


and once patched you should get something like this


Hope this helps someone
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Old 10th Dec 2007, 08:44 AM   #4
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Nice mini-tutorial Raja; thank you for that.
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Old 12th Dec 2007, 10:16 AM   #5
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Raja,

Thanks for the tutorial. I'm still a novice with splines, so this helps. I know there's a ton of great things splines can do so any good information I find is appreciated. My main frustration with splines is the dreaded "patching error" you list.
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Old 15th Jun 2008, 08:07 AM   #6
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I have a big problem with this stupid message says the curves doesn't cross. How can I prevent this message? I always connected 2 neighboured points and pressed ctrl + p. The example with the four points worked, but when i tried to patch a circle the message came all the time... Can u help me?

Greetz

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Old 15th Jun 2008, 09:11 AM   #7
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Splines are a lot easier to work with in LW if you use the CM_Loft tool (free plugin). It doesnt matter if the splines of different point amounts and intersecting them doesnt matter either. The only thing you need to do is select the curves in order of loft and then loft them. The tool does the rest, even resequencing the splines to have equal point counts.

Good mini tut Roger!
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Old 15th Jun 2008, 07:21 PM   #8
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Quote:
Originally Posted by Flashfire View Post
Splines are a lot easier to work with in LW if you use the CM_Loft tool (free plugin). It doesnt matter if the splines of different point amounts and intersecting them doesnt matter either. The only thing you need to do is select the curves in order of loft and then loft them. The tool does the rest, even resequencing the splines to have equal point counts.

Good mini tut Roger!
Do you know where to get that CM Loft tool? Google didn't give me anything. Sounds pretty useful.
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Old 15th Jun 2008, 07:50 PM   #9
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well as long as there is an anchor point where two spline meet (and these are welded) it should work
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Old 16th Jun 2008, 06:01 AM   #10
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Rather than selecting the end points and pressing CTRL P (which creates a new spline) select the two end points and press CTRL W (to weld them into one point).
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Old 16th Jun 2008, 06:04 AM   #11
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Splines...... Run... Just kidding, Thanks Raja
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Old 17th Jun 2008, 06:41 AM   #12
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Quote:
Originally Posted by Bells of Freedom View Post
Do you know where to get that CM Loft tool? Google didn't give me anything. Sounds pretty useful.
Its on F3d of all places,

http://www.foundation3d.com/forums/s...0&postcount=12

Cheers!
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Old 18th Jun 2008, 12:43 PM   #14
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Neat little tutorial
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Old 18th Jun 2008, 05:08 PM   #15
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Quote:
Originally Posted by Flashfire View Post
Thanks, Flashfire!!
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Old 18th Jun 2008, 08:01 PM   #16
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just glad someone got use of it.
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Old 20th Jul 2008, 12:58 PM   #17
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LW version used?
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Old 20th Jul 2008, 02:48 PM   #18
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LW 8.5 I think, but still should work in the newest version as well
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