Dear Patrick, Stroke smoothing would indeed be a useful feature for users of tablet devices that suffer either from a low resolution or from poor linux device support -- sorry to hear that your HP is among those. (It hasn't been acted on yet because for those of us lucky enough to have a Wacom or compatible tablet, the resolution is more than enough and smoothing is unnecessary...)
This is mostly an algorithmic problem -- definitely not dependent on any particular device, nor complicated in terms of user interface etc. The basic question is deciding, based on a sequence of input positions, how to smooth the polygonal line formed by these -- certainly not by adding more points to the polygonal line or turning it into a cubic spline, but rather to figure out how to recover lost precision caused by coordinates getting rounded to the nearest pixel. I believe that jarnal already has something like this in place (because it doesn't have access to high resolution input data on wacom tablets, so it's a necessary feature for them); looking at the stroke-smoothing code in jarnal should give a clue. Once a suitable algorithm is devised or found somewhere to replace a noisy polygonal line by a smoothed one, implementing it in xournal should be easy enough -- the question will remain whether this gives good results in your particular scenario, and/or for other users of tablets that don't send high resolution input data. Best, Denis On 05/10/2016 06:38 AM, Patrick Wurm wrote: > Dear Denis Auroux, > > first off, thank you very much for the masterpiece you created with > Xournal. > I love using it. > > I saw that stroke smoothing is on the TO DO list. As I desperately need > this feature, I thought I give it a try and implement it myself. > But before starting off, could you share your opinion on how much effort > this will take to implement with me? Would you consider this an easy > task or is it quite troublesome? > I just need to make this work for a single device (the HP Spectre X360), > so the solution does not have to be generally applicable. > > Thank you very much again, > Patrick > -- Denis Auroux UC Berkeley, Department of Mathematics 817 Evans Hall, Berkeley CA 94720-3840, USA aur...@math.berkeley.edu ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ Xournal-devel mailing list Xournal-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xournal-devel
