Re: Using velocities in the Global Kinematics...

[Dan Yargici <dan(at)imajonline.com>]

Great, thanks Guillaume!

DAN

guillaume laforge wrote:

> I'm not a 3d math specialist but the way to use velocity could be 
> something like this :
>
> - In your SCOP the inputs for the velocity are :
>  Inlinvelx > YourObject.kine.global.linvelx
>  Inlinvely > YourObject.kine.global.linvely
>  Inlinvelz > YourObject.kine.global.linvelz
>
> - Then you can create a vector from those values
>  var oVec = XSIMath.CreateVector3() ;
>  oVec.x = Inlinvelx.Value;
>  oVec.y = Inlinvely.Value;
>  oVec.z = Inlinvelz.Value;
>
> - Then use the velocity like this
>  TheVelocity = oVec.Length();
>
> - Then
>  What you want multiply by TheVelocity :-)
>
> Cheers
>
> Guillaume Laforge
>
>
> On 3/14/06, *Dan Yargici* <dan(at)imajonline.com 
> <mailto:dan(at)imajonline.com>> wrote:
>
>     Hi everybody,
>
>     I'd like to find a way of using the velocity of a null in global space
>     (via the global kine PPG) to drive some distortion of UVs in another
>     object's material.  Now I have pretty my everything setup, but I'd
>     just
>     like to know how one goes about turning these linear/anguar/x/y/z
>     velocities into a kind of general 'speed' to drive the effect.  i.e.
>     when object moves fast, distortion increases, when it stops,
>     distortion
>     stops.... ideally with a nice lag but that I can probably live
>     without
>     this time.
>
>     Should I just take the average of the absolute xyz velocities?
>
>     I'll be the first to admit I need get my head in the maths books, and
>     I'm sure the answer will be painfully embarassing, but what the hey,
>     bring it on!
>
>     Thanks in advance,
>
>     DAN
>
>
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