https://bugs.kde.org/show_bug.cgi?id=439106
--- Comment #2 from Ralek Kolemios <i...@ralek.art> --- Created attachment 139652 --> https://bugs.kde.org/attachment.cgi?id=139652&action=edit Proposed fix Text taken from https://krita-artists.org/t/what-makes-kritas-canvas-operations-feel-so-wrong/25377/20?u=ralek My concept for how to fix this. Of course I don't understand the inner working of QT or Krita, I'm just an artist, so this is going off of theoretical data and my desire to help. In the background, asynchronously, a pointer pseudoposition function is constantly receiving inputs from the actual pointer. It keeps the last 2 (or more if you’re a math major) of these positions and timings in-memory for later reference. At any point in time that an action requires an ‘up to date’ and ‘consistent’ but not necessarily extremely accurate pointer position, such as for panning, zooming, rotating, etc, instead of grabbing the current pointer position, it calls the pointerPseudoposition function. This function grabs the current microtime, and extrapolates a ‘current’ pointer position given the previous 2 mouse positions and microtime. I’d imagine the math would look something like: x1 = last known x position x2 = last x position before x1 y1 = last known y position y2 = last y position before y1 time1 = time int in microseconds of last known pointer input time2 = time int in microseconds of previously known pointer input before time1 currentTime = the microseconds of when the function is called newX = x1 + ( (currentTime - time1) / (time1 - time2) * (x1 - x2)) newY = y1 + ( (currentTime - time1) / (time1 - time2) * (y1 - y2)) This will output an X and Y position of the ‘mouse’ which should slot into whatever function the current pan/rotate/zoom function uses when it calls for the mouse position. This will cause slightly weird behavior if the pointer changes directions instantaneously, but for natural movements such as tablet pens, this could be a lifesaver. Perhaps it could be a toggle-able feature called ‘polling rate compensation’. -- You are receiving this mail because: You are watching all bug changes.
