Hi,
this time I solved or better got arround the following Problem, which might
be interesting tough.
I needed some Code to extract the rotation-part from a transformation Matrix
as a Quaternion. The following Code-parts are part of a project I´m
currently working on.
The following V1 Code gives obviously the wrong result for the "rot" Matrix.
V2 and V3 are working as expected, but i think they internaly also use the
matrix::factor() function. Thats what I found interesting.
Maybe someone could give me a hint, what i have done wrong in V1.
These results were produced by the CVS Version from 29.08.2004 with .NET
2003
Regards,
Andreas
--- V1 ---
const OSG::Matrix matrix(0,1,0,46,-1,0,0,42,0,0,1,0,0,0,0,1);
OSG::Quaternion quat;
OSG::Matrix rot;
OSG::Vec3f scale;
OSG::Matrix scaleaxis;
OSG::Vec3f trans;
OSG::Matrix proj;
matrix.factor(rot,scale,scaleaxis,trans,proj);
quat.setValue(rot);
std::cout << "Matrix: " << std::endl;
std::cout << matrix << std::endl;
std::cout << rot << std::endl;
std::cout << quat << std::endl;
--- V1 Output ---
Matrix:
0.000 1.000 0.000 46.000
-1.000 0.000 0.000 42.000
0.000 0.000 1.000 0.000
0.000 0.000 0.000 1.000
1.000 0.000 0.000 0.000
0.000 1.000 0.000 0.000
0.000 0.000 1.000 0.000
0.000 0.000 0.000 1.000
0 0 0 1
--- V1 End ---
--- V2 ---
const OSG::Matrix matrix(0,1,0,46,-1,0,0,42,0,0,1,0,0,0,0,1);
OSG::Quaternion quat;
OSG::Quaternion quat2;
OSG::Vec3f scale;
OSG::Vec3f trans;
matrix.getTransform(trans,quat,scale,quat2);
std::cout << "Matrix: " << std::endl;
std::cout << matrix << std::endl;
std::cout << quat << std::endl;
--- V2 Output ---
Matrix:
0.000 1.000 0.000 46.000
-1.000 0.000 0.000 42.000
0.000 0.000 1.000 0.000
0.000 0.000 0.000 1.000
0 0 -0.707 0.707
--- V2 End ---
--- V3 ---
const OSG::Matrix matrix(0,1,0,46,-1,0,0,42,0,0,1,0,0,0,0,1);
OSG::Quaternion quat;
quat.setValue(matrix);
std::cout << "Matrix: " << std::endl;
std::cout << matrix << std::endl;
std::cout << quat << std::endl;
--- V3 Output ---
Matrix:
0.000 1.000 0.000 46.000
-1.000 0.000 0.000 42.000
0.000 0.000 1.000 0.000
0.000 0.000 0.000 1.000
0 0 -0.707 0.707
--- V3 End ---
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