Re: [script] Comparing two transforms

["guillaume laforge" <guillaume.laforge.3d(at)gmail.com>]

Hi Bernard,

Maybe take a look to the matrix way. You can loop into the matrix to compare the values. It is a little bit shorter and maybe faster ?

function CompareMatrix( oObjA, oObjB )
{
    var oTransA = oObjA.Kinematics.Global.Transform;
    var oMatrixA = XSIMath.CreateMatrix4();
    oTransA.GetMatrix4( oMatrixA );

    var oTransB = oObjB.Kinematics.Global.Transform;
    var oMatrixB = 
XSIMath.CreateMatrix4();
    oTransB.GetMatrix4( oMatrixB );

    for ( var row = 0 ; row < 4 ; row++ )
    {
        for( var col = 0 ; col < 4 ; col++ )
        {
            if( Math.round( oMatrixA.Value( row, col ) ) != 
Math.round( oMatrixB.Value( row, col )) )
            return false ;
        }
    }
    return true ;
}


1/2

-- 
Guillaume Laforge
freelance TD | cg Artist
my blog ! http://vol2blog.blogspot.com/

On 1/9/07, Bernard Lebel <3dbernard(at)gmail.com> wrote:

Salut Christopher ;-)


Thanks for the advice.

Right now I'm using a somewhat ugly but effective approach:



def compareTransforms( oTransform1, oTransform2 ):
   
    """
    RETURN VALUE: boolean
    """
   
    bSame = True
   
    if round( oTransform1.PosX, 4 ) != round( oTransform2.PosX, 4 ):
        bSame = False
   
    elif round( oTransform1.PosY, 4 ) != round( oTransform2.PosY , 4 ):
        bSame = False
   
    elif round( oTransform1.PosZ, 4 ) != round( oTransform2.PosZ, 4 ):
        bSame = False
   
    elif round( oTransform1.RotX, 4 ) != round( oTransform2.RotX, 4 ):
        bSame = False
   
    elif round( oTransform1.RotY, 4 ) != round( oTransform2.RotY, 4 ):
        bSame = False
   
    elif round( oTransform1.RotZ, 4 ) != round( oTransform2.RotZ , 4 ):
        bSame = False
   
    elif round( oTransform1.SclX, 4 ) != round( oTransform2.SclX, 4 ):
        bSame = False
   
    elif round( oTransform1.SclY, 4 ) != round( oTransform2.SclY, 4 ):
        bSame = False
   
    elif round( oTransform1.SclZ, 4 ) != round( oTransform2.SclZ, 4 ):
        bSame = False
   
   
    #~ if not bSame:
        #~ xsi.logmessage( '< bb_ReplaceModels > :: Not same transforms.', c.siWarning )
    #~ else:
        #~ xsi.logmessage( '   < bb_ReplaceModels > :: Same transforms.' )
   
    return bSame



I wish there was a one-liner way to do this.


Bernard

On 1/9/07, Christopher Crouzet < christopher.crouzet(at)gmail.com> wrote:
> A such function that compare two CTransformation objects exists in the C++
> API.
>
> However, in scripting language I don't see anything equivalent (in 5.1),
> except the 'Equals' method that applies on SIVector3 and SIQuaternion
> objects which means that you have to first extract them from the
> SITransformation object by using the 'GetRotation', 'GetTranslation' and
> 'GetScaling' methods.
>
>
> Hope it helps,
> Christopher.
>
> (wouhou, my first post on this list, hello everyone !!)
>
>
>
> On 1/9/07, Bernard Lebel < 3dbernard(at)gmail.com> wrote:
> >
> > Hello,
> >
> > Is there a quick way, say a one-liner, to determine if two transforms
> > hold the same values?
> >
> > I have two objects, I just want to know if they have the same
> > transforms. If they do, then do something. If not, do something else.
> >
> >
> > Thanks
> > Bernard
> > ---
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> > unsubscribe xsi
> >
>
>