On Sun, Feb 28, 2010 at 6:31 PM, Charles R Harris <span dir="ltr">&lt;<a href="mailto:charlesr.harris@gmail.com">charlesr.harris@gmail.com</a>&gt;</span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">

As I understand it, you want *different* matrices applied to each vector? </blockquote><div>Nope--I need the same matrix applied to each vector.  <br><br>Because 3D translation matrices must, if I understand correctly be 4x4, the vectors must first be changed to length 4 (adding a 1 for the last term).  Then, the matrices would be applied.  Then, the resulting n*4 array would be converted back into a n*3 array (simply by dropping the last term).<br>

<br>Ian<br></div></div>