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MoGraph workaround??
I’ve got a city bus with a character inside of it. I was hoping I could drop them in a Null, put a MoGraph Rigid Body tag on it, and roll it down a ramp.
Of course, it didn’t work. The bus and occupant literally exploded on playback, then the rubble slid down the ramp. Good for a laugh, but how can I do it right?
I’m just starting to learn 3D, so I wonder if my models were put together properly. Take the bus model for instance, should I have a single object for headlights, chassis, wheels etc? Right now they’re seperate and overlapping in space.
Also, I know MoGraph Rigid Body is mostly just for clones. It seemed plausible though…
To recap, I discovered a really great way to make models spontaneously explode, but still don’t know how to make the bus subject to dynamics
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2 Replies
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It’s possible to do, but it takes some work. The first problem is that MoDynamics does not recognize concavity … like holes in wheels.
So what you have to do is make your wheel geometry editable, select all the polgons, run Functions>Disconnect (group unchecked), and then Functions>Explode Segments (group unchecked). Now what you’ve got is an empty polgyon object with child polygon objects — each one representing an individual polygon of your wheel.
Repeat for all the wheels.
Then you’ll place each wheel group under the cloner, and a null containing all the other parts of the bus. In the rigid body tag’s “collision” tab, you’ll set “Individual Elements” to “Top Level”.
Here’s a very basic scene demonstrating the technique: https://www.3danvil.com/tutorials/modynamics_car.zip
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Adam, Thanks for your answer! That worked perfectly!
-Jake
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