[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [grt-talk] Transformations
|
From: |
Nikodemus Siivola |
|
Subject: |
Re: [grt-talk] Transformations |
|
Date: |
Wed, 2 Apr 2003 02:36:05 +0300 (EEST) |
On Tue, 1 Apr 2003, Jason Dagit wrote:
> Are you sure they are orthogonal? The reflection/rotation component
Ooops! You're right. The inverse exists if the matrix M is square, and if
any of the following is true (actually, if one is true, all are):
* det(M) != 0
* column vectors are linearly independent
* row vectors are linearly independent
-- Nikodemus