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Rigging a train along path

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Igor HarmendaniRigging a train along path
by on Sep 13, 2012 at 2:46:01 am

Hello, everyone.

I've modeled a subway train with three cars (they're not the same object, but separated ones) and what I'm trying to do is to make the first car to follow a spline and the other two being pulled by the first one, just like a real train.

I've tried linking a dummy, linking one car to another but it doesn't work, since all the cars turn at a curve at the same time, looking like just a big wagon.

I read something about spineIK solvers, but I didn't understand what to do.

So, how do I solve this one?


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Joseph W. BourkeRe: Rigging a train along path
by on Sep 13, 2012 at 1:47:17 pm

I would think (someone else correct me if I'm wrong) that you could just apply a path constraint to each of the cars separately, then offset each car in the path constraint panel so that they're just behind each other with a bit of space between them.

Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com


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Igor HarmendaniRe: Rigging a train along path
by on Sep 13, 2012 at 4:31:58 pm

Thanks for the reply, Joseph.

Unfortunately I've already tried that but it didn't come out as I expected.

I think using Reactor would be a great way to do it, but I don't know how :(


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Joseph W. BourkeRe: Rigging a train along path
by on Sep 17, 2012 at 1:12:36 pm

You might create a bones system, with the nodes at each of the connecting points of the cars. Then when the cars follow the path, they should react accordingly. There should be a simple way to do this, short of using the real physics of Reactor.

Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com


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Joseph W. BourkeRe: Rigging a train along path
by on Sep 17, 2012 at 1:20:24 pm

Here's another approach to it:

http://kaap.us/tutorials.php?entry=woodTrains

Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com


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Igor HarmendaniRe: Rigging a train along path
by on Sep 17, 2012 at 3:27:21 pm

Thanks for the tip, Joseph.

I think the bones system might do the work, but I quite didn't understand what should I do to archieve this. I'm still a newbie in Max animation system ^^

Is there any tutorial about it?


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Joseph W. BourkeRe: Rigging a train along path
by on Sep 18, 2012 at 2:26:40 am

Here's a place to start:







Subscribe to the YouTube 3DS Max channel, and you'll find lots of excellent tutorials to get you started.

Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com


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Igor HarmendaniRe: Rigging a train along path
by on Sep 20, 2012 at 1:19:06 am

Thanks for the video, Joseph, it will be very handy ^^

For the train issue I managed to animated simply by linking each train car to a dummy that follows a path. By adjusting the path values I could get the kind of animation that I wanted.

Sorry for bothering you, thanks for the help!


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Joseph W. BourkeRe: Rigging a train along path
by on Sep 21, 2012 at 4:47:53 pm

It was no bother, Igor. That's the beauty of these forums. Some days we give answers, some days we get them. There are so many ways to achieve the same result in Max, and I don't think anyone knows all of them.

Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com


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