enterFrame: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/spark/components/Application.html#eventSummary
On Wed, Oct 12, 2016 at 8:35 AM, Maxim Solodovnik <solomax...@gmail.com> wrote: > Hello All, > > just have tried to find "screenRedraw" event to add listener and was > unable to :( which one should I use? > > I tried to add > > stage.addEventListener("screenRedraw", drawLine); > But unfortunately got only 1 point instead of series. > I'll to experiment with predefined FPS, setting it in runtime seems to > have no effect > > > On Thu, Oct 6, 2016 at 10:15 PM, Alex Harui <aha...@adobe.com> wrote: > > Might be time to run the profiler to see how much work is being done on > > each mouse event. > > And you can try an ActionScript-only version of your test. A variant of > > such a test would track timestamps on the mouse events and not draw > > anything until "much later" so you can get a sense for how many mouse > > events you can get if you don't do any display updates at all. It could > > just be that the input rate is gated by the browser or Flash Player. > > > > On the other hand, remember that the Graphics object builds up a vector > > list, so if you scribbled long enough there would be thousands and > > eventually millions of lineTo's to render, and that would totally swamp > > the renderer. Depending on what kind of "undo" logic you want to > support, > > you can opt for a "Paint" approach and draw the vectors into a bitmap and > > then forget about them, and/or retain your own vector list and somehow > cut > > off how far back you can undo. > > > > HTH, > > -Alex > > > > On 10/6/16, 1:24 AM, "Maxim Solodovnik" <solomax...@gmail.com> wrote: > > > >>>> Another possibility: don't attach the events to the stage, but to the > >>>>"area" object instead. > >>Maybe I'm doing something wrong, but this is what I have started from, > >>and it completely not working in my quickstart app > >> > >>will try "screenRedraw", we'll see it will allow more precise coordinates > >>:) > >> > >>On Thu, Oct 6, 2016 at 3:21 PM, Javier Guerrero García > >><javi...@gmail.com> wrote: > >>> And the 60fps? :) > >>> > >>> Also, try this: attach ALWAYS the mousemove event listener (even > >>>directly > >>> on MXML) instead of attaching it "on demand", and make mouseDown and > >>> mouseUp just set a "capturing" variable to either true of false. > >>> > >>> Another possibility: don't attach the events to the stage, but to the > >>> "area" object instead. > >>> > >>> Another one: IIRC, there was a "screenRedraw" event, triggering right > >>>after > >>> each frame is painted (30-60 times per sec). You could attach the > >>>capturing > >>> function directly to that event, just checking if the "capturing" > >>>variable > >>> is true or false before proceed with the points.push. > >>> > >>> On Thu, Oct 6, 2016 at 10:03 AM, Maxim Solodovnik < > solomax...@gmail.com> > >>> wrote: > >>> > >>>> 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 > >>>> > >> > >> > >> > >>-- > >>WBR > >>Maxim aka solomax > > > > > > -- > WBR > Maxim aka solomax >