[ODE] About world's axis
aramboy at kittymail.com
Mon Apr 16 06:54:26 MST 2007
Thanks for your help and sorry for my question which does not clear.
The thing that I confuse as :
- I have build 2 application using ODE
- The first app, I've used drawstuff that come with ODE to display graphic, when I set gravity as ( 0, 0, -9.81 ) the object fall from higher to lower.
- But with the second app. I've used GLUT to display, when I set gravity as ( 0, 0, -9.81 ) the object move from near to far
- So, I don't know why this happened because I've initial ODE for 2 applications in the same way. I think the object in 2 app should fall in the same axis.
I hope that this will more clear than the previous question. My English is not good :(
> ----- Original Message -----
> From: "David Walters" <hidden.asbestos at googlemail.com>
> To: "Tor ..." <aramboy at kittymail.com>
> Subject: Re: [ODE] About world's axis
> Date: Mon, 16 Apr 2007 09:56:49 +0100
> > I have a question about the ODE World's axis.
> > What is the vertical axis for ODE ?
> ODE has no predefined 'vertical' axis - objects will feel the effects
> of gravity in whatever direction you set the gravity vector to.
> So if you use ( 0, -9.81, 0 ) then Y will be the vertical and if you
> use ( 0, 0, -9.81 ) then Z will be vertical. The demo applications
> that come with ODE use the Z axis for vertical - but this is
> arbitrary, my engine uses the Y axis.
> As long as you're consistent then it's doesn't matter - I suspect this
> is where your problem lies: a mismatch between gravity and projection
> when rendering?
> David Walters
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