Re: Fwd: [Moderator Action] Re: order of transforms

>>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.

excuse me...

   (A1*(A2*(..(An * p)...)))

but the point is that if An is the first transformation and A1 is the last 
then the point p should be transformed accordingly. (i'm pretty sure the 
above would result in a recursion of...

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

...which is defined, but correct me if i'm wrong; i abhor matricies).

                                                  • mjumbe •

Get Your Private, Free E-mail from MSN Hotmail at

Received on Monday, 21 May 2001 12:33:52 UTC