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Re: Spheres hurled off of map entity edges in Phys [Re: Joey] #126769
05/10/07 21:38
05/10/07 21:38
Joined: Aug 2002
Posts: 681
Massachusetts, USA
Ichiro Offline OP
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Ichiro  Offline OP
User

Joined: Aug 2002
Posts: 681
Massachusetts, USA
Thanks for the suggestions, guys. Ultimately, I think this is a flaw in the physics simulation -- I ran further tests, and it's possible to get the ball flying at ridiculous speeds. If that ball is the only thing moving, it shouldn't be possible for |v(final)| to be greater than |v(initial)|... unless the mass of the ball is being converted into kinetic energy (E=MC^2 after all ).

I *think* I just need to go with a system of c_move()s. Alas!


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Re: Spheres hurled off of map entity edges in Phys [Re: Ichiro] #126770
05/11/07 09:11
05/11/07 09:11
Joined: Jul 2000
Posts: 27,987
Frankfurt
jcl Offline

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jcl  Offline

Chief Engineer

Joined: Jul 2000
Posts: 27,987
Frankfurt
It is certainly a flaw in the physics simulation, but when you use a physics engine you just have to deal with such flaws. ODE uses a numerical approximation, which results in such a behavior - called an "explosion" - if parameters are outside its usual range. It's certainly possible to fix this, by adjusting the ball's physical properties as suggested here.

Re: Spheres hurled off of map entity edges in Phys [Re: jcl] #126771
05/11/07 16:08
05/11/07 16:08
Joined: Aug 2002
Posts: 681
Massachusetts, USA
Ichiro Offline OP
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Ichiro  Offline OP
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Joined: Aug 2002
Posts: 681
Massachusetts, USA
Yeah; I've been mucking with gravity, elasticity, check distance, fps lock, sexiness, mass, etc. I just haven't been able to find any parameters that work for me. Has anyone else run into this problem (rolling sphere) and managed to solve it?


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