Hi Regina,
On 19.11.2013 23:41, Regina Henschel wrote:
Hi Armin,
Regina Henschel schrieb:
Hi Armin,
[..]
Of cause there might be an error in my simulation, but examine that, it
would be helpful to know, in which way the values of rShear are intended
to be used.
It was indeed an error in my simulation. Now it works fine.
Can you write me down the matrices?
I can, but they are in the book you ordered :-)
You can also find them in the web on various places, e.g.
/Matrix/ Algebra and Affine Transformations
<http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CFgQFjAG&url=http%3A%2F%2Fpeople.cs.clemson.edu%2F%7Edhouse%2Fcourses%2F401%2Fnotes%2Faffines-matrices.pdf&ei=35KMUtCkIoSI0AWSqYCwAw&usg=AFQjCNHHUeWtbq35mta06SdatTAKNVaR7A&bvm=bv.56643336,d.d2k&cad=rja>
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CFgQFjAG&url=http%3A%2F%2Fpeople.cs.clemson.edu%2F~dhouse%2Fcourses%2F401%2Fnotes%2Faffines-matrices.pdf&ei=35KMUtCkIoSI0AWSqYCwAw&usg=AFQjCNHHUeWtbq35mta06SdatTAKNVaR7A&bvm=bv.56643336,d.d2k&cad=rja
One more hint: Whenever looking at papers about this, three things are
essential:
- the orientation of the homogen matrix may vary, there are two possible
systems. Our interpretation uses the right column as translaton
- the multiplication order might vary in notation. Our interpretation
multiplies matrices from the left
- matrix multiplication is not commutative
Not needed any longer. A shear matrix is
1 rShear.X rShear.Y
0 1 rShear.Z
0 0 1
Excuse me for bothering you.
You never do ;-)
Kind regards
Regina
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