How can I make a conveyor belt?

Discussion in 'Editor & General Support' started by dock, Nov 17, 2008.

1. dock

Joined:
Jan 2, 2008
Posts:
382
I'm trying to make a physics driven conveyor belt at the moment, and I tried to make one from cylinders rotating but it doesn't seem to work very well. I have to put the friction really high, and even then it slips unless it rotates very slowly.

Is there a better way to make a simple conveyor belt?

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2. bigkahuna

Joined:
Apr 30, 2006
Posts:
5,435
To accomplish this I would probably not use physics directly, and instead write a script that on collision with the rollers added a horizontal force to the box. There's probably a way to have the center of force at the point where the collision occurs which would heighten the realism a bit (that way if the belt touches a corner of the box it rotates the box while propelling it). If you went this route you could then create a model that looks more like a conveyor belt (instead of rollers).

3. dock

Joined:
Jan 2, 2008
Posts:
382
Oh you're right, that works pretty well! Thanks!

I wonder how I can put curves in the conveyor belt with this method, but hopefully with some well thought out colliders it should naturally follow a path with some encouragement. Hmm.

4. Arges

Joined:
Oct 5, 2008
Posts:
359
Perhaps by applying the force in the original "forward" direction of the roller that the box is colliding with? A slowly curving path should yield a series of forces that make it turn.

I'd also keep some borders, to "fence in" the box just in case.

5. Bones3D

Joined:
Apr 28, 2008
Posts:
314
Hmm... how about using a surface dotted with spheres to create an air-hockey like effect by making the spheres act as ball bearings?

6. careyagimon

Joined:
Dec 20, 2007
Posts:
209
This worked well for me:

Code (csharp):
1.
2. var speed : float = 2.0:
3. OnTriggerStay(other) {
4. other.rigidbody.MovePosition(other.transform.position + transform.forward * Time.deltaTime * speed);
5. }
6.
7.
It's kinda in-between physics and kinematic. ie It's really predictable and simple, but it's still dynamic.

7. juber824

Joined:
Feb 8, 2014
Posts:
1
tsyrchurn likes this.