Slic3r: 1.3.1-dev-54a31ee
OS: Ubuntu 18.04.4

Load STL
Select model.
Right click - Rotate - Around z axis...
Input 90 - press ok
Model moves 90 degrees counter clock wise as expected.
Input 90 - press ok
BUG Model doesn't move.
Input 0 - press ok
Model doesn't move. (As expected for relative rotations, but not absolute.)
Input -90 - press ok
BUG Model rotates 180 degrees.

Around x

Expected Behavior

Open demo.html, and use mouse / touch pad to rotate / zoom / pan the design.

Actual Behavior

Static display of design.

Steps to Reproduce the Problem

1. As described

Specifications

• Version: V2+
• Platform: regl-renderer
• Environment: browser

Add Runnable links of the code below the example.
Use link name Run Code which links to a Online C++ complier conatining the example code.
Use Rextester as the Online C++ Compiler (If you have a better suggesstion please comment).

Follow below steps to generate the Run Code Link.

1. Go to Rextester
2. Copy or write the example

Hello, it would be great if you could add some 3d text models. Thanks in advance :-)

From the Python docs:

object.repr(self)
... If at all possible, this should look like a valid Python expression that could be used to recreate an object with the same value (given an appropriate environment).

Currently:

>>> repr(cq.Plane((1, 2, 3), (1, 0, 0), (0, 0, 1)))
'<cadquery.occ_impl.geom.Plane object