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  Mass vs Weight in ODE  (Read 876 times)
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Offline m_ali_alex

Senior Newbie





« Posted 2006-03-07 19:44:24 »

hi there
any one knows how ode work with wight and mass
i am geting some uncomfartable results and i need to know whether
ode is calculating the mass and we should just creat things with the weight or we have to convert it and do it our selfs
where the formula is w=m.g
thanks
Offline NewbTon

Junior Member




Odejava games rock!


« Reply #1 - Posted 2006-03-07 19:59:09 »

I dont think ODE scale and mass are easely translated to "real world" pounds and miles.
My experience is that diffent mass/forces/scales produce very different outcome.
Even if they are proportionally  the same.
Example : a body with a mass 1000, a force 1000, scale 1000 and a mass 1000 will behave
differently than a body with  mass 100, force 100 scale 100 and mass 100, don't ask me why.
Before I used to scale my things to enourmous proportions (with forces 10000000 or something just to get things moving). But now
I try to keep the scale and mass below 5, it produces better results I think (depending on what you want to simulate of course).
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