Hi,
05.04.2017 15:13, Sean Harmer пишет:
Yes, just use the dot product.
You want to say, that QVector3D::dotProduct() will give me an angle?
Sean
On Wednesday 05 April 2017 14:59:48 Igor Mironchik wrote:
Hi,
I Googled it and found:
The cos of angle between vectors is:
|(ax*bx + ay*by + az*bz)
-------------------------------------------------------- sqrt(ax*ax +
ay*ay + az*az) * sqrt(bx*bx + by*by + bz*bz)|
05.04.2017 14:52, Igor Mironchik пишет:
05.04.2017 14:45, Igor Mironchik пишет:
Hi,
05.04.2017 14:29, Paolo Angelelli пишет:
Just cross N and M to get the vector around which to rotate.
Then use a QQuaternion to set the rotation in the Qt3DCore::QTransform,
and construct it with fromAxisAndAngle(const QVector3D &axis, float
angle)
Ok, I can rotate around the right axis. But what angle should I rotate?
This is my question.
And how can I calculate new normal to the rotated plane?
I already know it...
I just need to know what angle should I rotate.
On Wed, 5 Apr 2017 14:18:56 +0300
Igor Mironchik <igor.mironc...@gmail.com> wrote:
Hello,
Let's say I have two vectors - N (normal vector to plane P1) and M
(normal vector to plane P2).
How to calculate x, y, z axis rotations angles for plane P2 to make
plane P2 parallel to P1?
How to calculate x, y, z axis rotations angles for plane P2 to
rotate it
around vector N?
Thank you.
And what is the measurement of angle in rotationX() of
Qt3DCore::QTransform?
I need to calculate angles in this units.
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