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Fwd: [Moderator Action] Re: order of transforms

From: Dean Jackson <dean@w3.org>
Date: Mon, 21 May 2001 08:49:58 +1000
To: www-svg@w3.org
Message-ID: <20010521084958.A23308@act.cmis.csiro.au>
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(I think Stefan is subscribed from another address?)


attached mail follows:


mjumbe,
> >Applying those transforms to a point we can calculate the result matrix
> > >first and then transform the point, as in ..
> >(An*...*A2*A1) * p
> >or apply every single transformation matrix consecutively to the point,
>as
> >in ..
> >(An*(...*(A2*(A1 * p)))..)
> >
>
> it seems to me that the formula would be:
>
>   (((..(An * p)*...)*A2)*A1)
>
> which would be true to the reading from left to right.
>
this would require to multiply the column vector with the transformation
matrix from the left

[x] [a c e]
[y] [b d f]
[1] [0 0 1]

which is not defined.

--
stefan
Received on Sunday, 20 May 2001 18:51:26 GMT

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