I tried to change the code as follows grab points in event handler [1], then actually draw it after capturing is over [2] The result curve is not smooth in case of fast, long distance moves
[1] https://github.com/solomax/FlexSandbox/blob/master/web/src/Main1.mxml#L37 [2] https://github.com/solomax/FlexSandbox/blob/master/web/src/Main1.mxml#L31 On Thu, Oct 6, 2016 at 2:37 PM, Javier Guerrero García <javi...@gmail.com> wrote: > Yes, I understood, but you can do it in many ways: > > - Capture mouse coordinates, and draw the new pixel on a bitmap placed > underneath > - Capture mouse coordinates, and draw a new <Line> object from the last > captured point to the new coordinates, and so on > - Capture mouse coordinates, and perfom a graphics.lineTo on a Sprite on > each mouse move (a one liner for a one liner :) > > I think the vector approach should perform better on redraws, and I really > do think your problem is right there on the fullscreen redraws: 60fps or > even 30fps should be more than enough to capture a signature. > > To confirm first, try first separating the areas, and see it that makes it > smoother :) > > On Thu, Oct 6, 2016 at 9:27 AM, Maxim Solodovnik <solomax...@gmail.com> > wrote: > >> It sort of "pencil drawing" by mouse/pen >> I'll try to capture points and draw it later(or better in separated thread) >> >> Thanks for the pointer >> >> On Thu, Oct 6, 2016 at 2:23 PM, Javier Guerrero García >> <javi...@gmail.com> wrote: >> > Hi Maxim! >> > >> > Are you capturing the points on line objects, or on a bitmap drawn at the >> > bottom that has to be interpolated and redrawn on every mouse movement? >> Try >> > separating the capture and paint areas, capturing line objects instead of >> > pixels on a bitmap, or at least draw the bitmap with the lowest posible >> > interpolation quality, to see if it helps. >> > >> > Hope it works :) >> > >> > On Thu, Oct 6, 2016 at 5:49 AM, Maxim Solodovnik <solomax...@gmail.com> >> > wrote: >> > >> >> changing FPS to 60 doesn't help :( (originally it was 30) >> >> Final code for capturing events and drawing is the same as prototype >> code >> >> still got ugly, non-smooth curve in case mouse moving very fast >> >> >> >> Line in much smoother in Gimp >> >> In fact Flex desktop app produces smooth enough line >> >> will try to create browser quick start and double check >> >> >> >> On Thu, Oct 6, 2016 at 9:18 AM, Maxim Solodovnik <solomax...@gmail.com> >> >> wrote: >> >> > Hello, >> >> > >> >> > Thanks a lot for the quick answers, definitely flex is one of my >> >> > favorite communities :) >> >> > Here is example project: https://github.com/solomax/FlexSandbox >> >> > since it is desktop and tiny it looks not that bad >> >> > In my main project the resulting line is not smooth at all :( >> >> > >> >> > I'll try to check the code and remove any delays, thanks for the >> pointer. >> >> > >> >> > Additionally I'll try to check FFT, I have tried to add additional >> >> > points and use cubicCurveTo, but was unable to finish this (it is >> >> > currently commented) >> >> > >> >> > On Thu, Oct 6, 2016 at 1:47 AM, OK <p...@olafkrueger.net> wrote: >> >> >> Alex Harui wrote >> >> >>>>can't you just up the frame per second of the swf to say 60, and if >> >> >>>>needed interpolate data points to smooth it? >> >> >>> That is a possibility, but the interpolation code may also affect >> input >> >> >>> rate. >> >> >> >> >> >> For this approach it might be helpful to google with "spline >> >> interpolation" >> >> >> and "FFT" (Fast Fourier Transformation). Maybe you find some ready to >> >> use >> >> >> AS3 implementations. >> >> >> >> >> >> Olaf >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> -- >> >> >> View this message in context: http://apache-flex-users. >> >> 2333346.n4.nabble.com/Get-mouse-coordinates-on-high- >> >> speed-tp13737p13748.html >> >> >> Sent from the Apache Flex Users mailing list archive at Nabble.com. >> >> > >> >> > >> >> > >> >> > -- >> >> > WBR >> >> > Maxim aka solomax >> >> >> >> >> >> >> >> -- >> >> WBR >> >> Maxim aka solomax >> >> >> >> >> >> -- >> WBR >> Maxim aka solomax >> -- WBR Maxim aka solomax
