I have no Idea if it will work with QGraphicScene, but if you use
translations and rotations in R³ you have to think about the order of
them. T * R * v != R * T * v (with T = Translationmatrix, R =
Rotationmatrix and v = vector). So Try setting the position of the item
to 0|0|0, perform the rotation and translation with matrices and play
with permutating them.
Cheers
Philipp
On 12.09.2012 12:24, Till Oliver Knoll wrote:
Am 12.09.2012 um 11:19 schrieb "Duan,Lin" <[email protected]
<mailto:[email protected]>>:
...
How can I do , so it can performed as expected (first graph)?
I think you can't: from what I understand you are trying to perform a
rotation in 3D space, whereas QGraphicsScene/View only manage 2D (or
"pseudo 3D" aka 2.5D, if you take the "depth" z-coordinate into
account) objects.
Use a "proper" 3D scene (QGLWidget) or try the new "Qt Quick3D" module!
Cheers,
Oliver
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