Matrix multiplication

Vladimir Gajic

Hello@all,

I need to perform a matrix multiplication with 3 3x3 matrices in c#. There are some algorithms out there but I´m afraid that my programming skills are not quite enough yet to modify them according to my needs.

I would be grateful for any hints & suggestions.

Regards
V.

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
If you check this link, there's some C# code for a simple Matrix class and a 'naive' Matrix multiplication method:

http://www.bratched.com/en/home/dotnet/48-fun-with-matrix-multiplication-and-unsafe-code.html

Unless you have an interest in doing this as fast as possible you can ignore the 'unsafe' code multiplication method.

The code can either be used as it stands or you can easily modify it so that it only relates to 3 x 3 matrices.

To multiply 3 matrices, you would need of course to multiply the first two and then multiply the result by the third.
Vladimir Gajic13y ago
Thank you guys. I checked both methods and they work fine for me. Didn't use the unsafe code because there is at present no need for increasing the performance.

Regards
Vladimir
Nitesh Kejriwal13y ago
If you are using .Net framework 4.0 or greater you can use Matrix.Multiply() method.

Check this -

http://msdn.microsoft.com/en-us/library/system.windows.media.matrix.multiply.aspx