Dear Shuhao,
It's not all that efficient in fact -- but each item (e.g. a pen stroke)
has a bounding box (i.e. the smallest rectangle containing it entirely)
that xournal keeps track of. So when one uses the eraser, xournal scans
through all items on the page (actually just the current layer) a
Another question is how do you enabled efficient erasing? How is the
line segments stored so they can be efficiently looked up for erasing?
Thanks,
Shuhao
On 10/01/2014 05:00 PM, Denis Auroux wrote:
> On 10/01/2014 05:20 PM, Shuhao Wu wrote:
>> I'm also impressed by the fact that the anti aliasin
