Is it possible to have rotate feature?

[mgorabbani]

I am looking for a way to have to zoom in out feature as well as rotate feature. but all the library i see doesn't have rotate feature. Can you please guide me an way to add this?

[mnogueron]

@mgorabbani In order to support rotation in PanZoom there are some internal modifications to make.
I will try to evaluate how much change it needs to work, but that's a feature I would definitely like to add.

To make it work I basically need to rewrite all my scaling / panning calculation with a transformation matrix (see http://angrytools.com/css-generator/transform/)

[mnogueron]

@mgorabbani I have implemented a PoC in master that supports rotation.
It is only available through the rotate function using refs and not yet available with touch control.

There is one small issue that makes the whole screen flicker when you rotate to +/-180deg, I will try to fix it and release a new version with the rotation feature.

[mgorabbani]

wow! that's cool!

[mnogueron]

It's suffering some heavy performance degradation that I will have to deal with before releasing a new version. So make sure you don't use the latest code on master for production release.

[mgorabbani]

Oh okay no problem.

[mnogueron]

@mgorabbani I've just released v0.2.5 that supports rotation through the rotate method.

I am still struggling when passing from 180 to 181deg or -180 to -181deg, with some flickery transitions, but the overall performance issue has been fixed and should run smoothly from now on.