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Simulating Inertia "Asteroids" videogame-style

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Corrado Carlevaro
Simulating Inertia "Asteroids" videogame-style
on Jun 25, 2012 at 10:03:33 am

Hi,
I always tried to simulate some inertia on camera or ojects movements but with no luck. The effect I want to achieve is the very same of old arcade video game "Asteroids", not just adding some delay but keeping the motion indefinitely until the next "thrust".
I'd like to keyframe the main movements and have some Xpresso or Dynamics to add this Inertia but don't know how to proceed. I've read about some plugin by Corearsenal but the website seems to be off.
Thank you

Corrado C.


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Greg Burrus
Re: Simulating Inertia "Asteroids" videogame-style
on Jun 25, 2012 at 3:45:28 pm

If I where to try this with dynamics I would look into playing with the linear damping and follow position. You may be able to rig something up so that you could animate some linear damping on the movement to give it that asteroid slow down feel.

You could set a initial velocity then key in some linear damping then set it back to 0 to let it keep moving. Depending on what your scene that could work for the beginning then you could add some wind or attractors to make it move faster after the initial burst.

There probably is a setup for this already in c4d with thinking particles so you may want to look through the content browser for a setup that may work.


Hope that helps


Greg

http://mogra.g2bproductions.com/ - Blog
http://g2bproductions.com/ - Portfolio


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Corrado Carlevaro
Re: Simulating Inertia "Asteroids" videogame-style
on Jun 26, 2012 at 10:19:03 am

Thank you, but isn't there a more staightforward way to do that? I just want the object not to come to a complete stop at the keyframe, kind of a secondary motion system, or maybe it's just a matter of keyframe interpolation


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Greg Burrus
Re: Simulating Inertia "Asteroids" videogame-style
on Jun 26, 2012 at 10:52:02 am

Not sure if you can have a secondary motion system like you can in 3ds max with animation layers if that's what you had in mind. You definitely could do it with just key frame animation it would just be a matter of adjusting the interpolation with curves to get the motion you want for the movement.

You also could have the main movement controlled by a null then the main object could have its own animation keyframes below it.


Greg

http://mogra.g2bproductions.com/ - Blog
http://g2bproductions.com/ - Portfolio


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Adam Trachtenberg
Re: Simulating Inertia "Asteroids" videogame-style
on Jun 28, 2012 at 3:37:47 am

You could use dynamics with the simuluation>dynamics>motor object, by placing the motor as a child of your object and animating its rotation and force. Pretty hard to control, though.


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Corrado Carlevaro
Re: Simulating Inertia "Asteroids" videogame-style
on Jul 1, 2012 at 11:44:24 am

I tried with motor, it's working but yes, hard to control. At least now I know there isn't a simple solution.
Thank you

C.C.


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