Decided to go back to my data source to double check. When you're
writing off the rotation to file - be sure to use the rotation array
to pull the data from rather than the position one...
I'm sure to be hit by everyone for this.
Cheers,
Alan.
On 7/20/05, Alan Jones <skyphyr(at)gmail.com> wrote:
> Hi Andy,
>
> This is what I'm doing
> MATH::CTransformation trans;
> //rotate the mesh
> trans.SetRotationFromXYZAngles(currentParticle.rotation);
>
> //resize the mesh
> trans.SetScalingFromValues(currentParticle.size,
> currentParticle.size, currentParticle.size);
>
> //reposition the mesh
> trans.SetTranslation(currentParticle.position);
>
> vertices[k].MulByTransformationInPlace(trans);
>
> If the particle stays still then it doesn't spin (which further leads
> me to believe it's a rotation information problem). The particle
> information there isn't in standard format - it's a struct I created
> myself from the particle information which I cached to file.
>
> Cheers,
>
> Alan.
>
> On 7/20/05, Andrew Nicholas <andy(at)andynicholas.com> wrote:
> >
> > Have you tried using the SetFromXYZAngles function for the siRotation or
> > siTransform objects?
> >
> > > but is it Euler? is it XYZ rotation order? YZX? ZYX? etc?
> >
> > That's always bothered me too. So far, I've not found anything in the docs
> > that says what rotation order the function uses.
> >
> > Andy
> >
> >
> >
> >
> > > It says somewhere it's radians.
> > >
> > > but is it Euler? is it XYZ rotation order? YZX? ZYX? etc?
> > >
> > > Is it in world space? object space? etc etc
> > >
> > > any why the spinning?
> > >
> > > I'm starting to sound boring... oh wait - that happened a long time ago.
> > >
> > > Cheers,
> > >
> > > Alan.
> > >
> > > On 7/20/05, kim aldis <kim(at)aldis.org.uk> wrote:
> > >> Degrees/radians?
> > >>
> > >> > -----Original Message-----
> > >> > From: owner-xsi(at)Softimage.COM
> > >> > [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Alan Jones
> > >> > Sent: 20 July 2005 11:25
> > >> > To: xsi(at)Softimage.COM
> > >> > Subject: Particle Rotation
> > >> >
> > >> > Hi All,
> > >> >
> > >> > Does anyone know the format of the particle rotation
> > >> > information? I can't find anywhere in the docs that gives
> > >> > more detail than it being a CVector3.
> > >> >
> > >> > My problem is that I've cached the data, but when I apply the
> > >> > rotation to objects they slowly spin. I've checked the cloud
> > >> > by applying instances and they don't suffer the spinning.
> > >> >
> > >> > Any ideas?
> > >> >
> > >> > Cheers,
> > >> >
> > >> > Alan.
> > >> >
> > >> > ---
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