[Interest] Qt3DCore::QTransform::fromAxisAndAngle

[Igor Mironchik]

Hi,


06.04.2017 7:13, Igor Mironchik пишет:
> Hello,
>
> What does Qt3DCore::QTransform::fromAxisAndAngle units of angle 
> expect? Degs or rads?

It uses degrees...

405 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#_ZN11QQuaternion16fromAxisAndAngleERK9QVector3Df> 
	QQuaternion 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.h.html#QQuaternion> 
QQuaternion 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.h.html#QQuaternion>::fromAxisAndAngle(/const/ 
QVector3D 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qvector3d.h.html#QVector3D>& 
axis, /float/ angle)
406 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#406> 
	{
407 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#407> 
	/// Algorithm from:/
408 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#408> 
	/// http://www.j3d.org/matrix_faq/matrfaq_latest.html#Q56/
409 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#409> 
	/// We normalize the result just in case the values are close/
410 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#410> 
	/// to zero, as suggested in the above FAQ./
411 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#411> 
	/float/ a = (angle 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#5angle> 
/ 2.0f) * M_PI <https://code.woboq.org/qt5/include/math.h.html#418> / 
180.0f;
412 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#412> 
	/float/ s = std::sin 
<https://code.woboq.org/qt5/include/c++/6.1.1/cmath.html#_ZSt3sinf>(a 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#6a>); 

413 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#413> 
	/float/ c = std::cos 
<https://code.woboq.org/qt5/include/c++/6.1.1/cmath.html#_ZSt3cosf>(a 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#6a>); 

414 	QVector3D 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qvector3d.h.html#QVector3D> 
ax = axis 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#4axis>.normalized 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qvector3d.h.html#_ZNK9QVector3D10normalizedEv>(); 

415 	*return* QQuaternion 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.h.html#QQuaternion>( 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.h.html#_ZN11QQuaternionC1Effff>c 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#8c>, 
ax 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#9ax>.x 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qvector3d.h.html#_ZNK9QVector3D1xEv>() 
* s 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#7s>, 
ax 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#9ax>.y 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qvector3d.h.html#_ZNK9QVector3D1yEv>() 
* s 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#7s>, 
ax 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#9ax>.z 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qvector3d.h.html#_ZNK9QVector3D1zEv>() 
* s 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#7s>).normalized 
<https://code.woboq.org/qt5/qtbase/src/gui/math3d/qquaternion.cpp.html#_ZNK11QQuaternion10normalizedEv>(); 

416 	}



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