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Groups > comp.lang.javascript > #37360
| Newsgroups | comp.lang.javascript |
|---|---|
| Date | 2019-09-24 05:21 -0700 |
| References | (11 earlier) <bc761f80-bd32-42ac-8bc5-dd2fd86b3526@googlegroups.com> <92d2618e-f44e-41ac-a086-3a3ccdb315f5@googlegroups.com> <17cf6e8b-977d-41e6-ad6f-6c8bac96f34a@googlegroups.com> <8d7586ed-7809-4b8b-85be-3969f145ce05@googlegroups.com> <ed4d1c85-2799-4440-bd30-b0a8337e40b7@googlegroups.com> |
| Message-ID | <bfa80ad5-e1e4-4333-bbd0-b09e718bdace@googlegroups.com> (permalink) |
| Subject | Re: Advanced logic "measure a bar" |
| From | Jonas Thörnvall <jonas.thornvall@gmail.com> |
Den tisdag 24 september 2019 kl. 14:18:41 UTC+2 skrev Jonas Thörnvall:
> Den tisdag 24 september 2019 kl. 14:17:44 UTC+2 skrev Jonas Thörnvall:
> > Den måndag 23 september 2019 kl. 09:38:40 UTC+2 skrev Jonas Thörnvall:
> > > Den söndag 22 september 2019 kl. 21:32:55 UTC+2 skrev Jonas Thörnvall:
> > > > Den söndag 22 september 2019 kl. 13:52:44 UTC+2 skrev Jonas Thörnvall:
> > > > > Den lördag 21 september 2019 kl. 14:29:28 UTC+2 skrev Jonas Thörnvall:
> > > > > > Den lördag 21 september 2019 kl. 14:17:14 UTC+2 skrev Jonas Thörnvall:
> > > > > > > Den lördag 21 september 2019 kl. 11:35:59 UTC+2 skrev John G Harris:
> > > > > > > > On Fri, 20 Sep 2019 14:38:30 -0700 (PDT), Jonas Thörnvall
> > > > > > > > <jonas.thornvall@gmail.com> wrote:
> > > > > > > >
> > > > > > > > <snip>
> > > > > > > > >Nah there is definitly a bug in javascript, probably same in other languages because i remember the quirk.
> > > > > > > > <snip>
> > > > > > > >
> > > > > > > > Please tell us what the problem is. Avoid talking about MIDI as most
> > > > > > > > of us know nothing about MIDI access.
> > > > > > > >
> > > > > > > > John
> > > > > > >
> > > > > > > Well there is really no midi to the problem but i am not sure the script start without a midi device.
> > > > > > >
> > > > > > > 1.So scrollbarPos is just a moving target using the **clock** "main reference point".
> > > > > > > 2. FRONTOFFSET when you press a key it has a distance to scrollbar "the front".
> > > > > > > 3. When you release **same key** that is also a distance vs scroolbar thus you get a notelength "barLength" for note.
> > > > > > >
> > > > > > > As you can see they are save in arrays.
> > > > > > > So....
> > > > > > >
> > > > > > > The cases starting with.
> > > > > > > Pressed/Note On | Released/Note Off
> > > > > > > *
> > > > > > > * *
> > > > > > >
> > > > > > > But we have to keep track if the note released, because if not the backend still stuck to the painted keyboard "bar expanding with stuck backend" Ok?
> > > > > > >
> > > > > > > Or same note could have been released, so we must have a boolean for each pair that is released right. keyReleased[midiEv]
> > > > > > >
> > > > > > > Then at each clocking "depending on FPS" the function called.
> > > > > > > The problem is that internally in "some assembler code" or "machine code" something goes wrong, this is not just Javascript because i remember same problem from probably turbo pascal, some 30 years ago.
> > > > > > >
> > > > > > > So it is some reference close to hardware that goes wrong "or my logic".
> > > > > > > What basicly happen is that the wavefront of released note "rightside rectangle", moving twice the speed of backend "leftside rectangle". And if you try compensate by subtract also the backend, from the front "half speed", it affacts the leftside x of rectangle the first argument. So the backend to not move at all.
> > > > > > >
> > > > > > > The values are linked at some fundamental level, but if you write out in console before write the rectangle the values come out correct.
> > > > > > >
> > > > > > > That is it.
> > > > > > >
> > > > > > >
> > > > > > > *
> > > > > > > *
> > > > > >
> > > > > > If you just want to try you probably do not need a midi interface cable, you could install a virtual midicable i use Tobias Erichsens loopMIDI, and then you use the virual keyboard.
> > > > > >
> > > > > > You have to check RT render note, and press record. Press note on and release and watch what happens.
> > > > >
> > > > > Well i added a break statement to the while z look, so if same keys pressed twice it do not step on to next keyrelease event
> > > > >
> > > > > But that is not the problem because the fault is there with just a single press and release of note, when only 2 events recorded.
> > > >
> > > > Well this is the fastest variant i can do, anyone can to the looping and condition faster?
> > > > But the reference bug in canvas still there.
> > > >
> > > > var midiEv=0;
> > > > var rightSide=[];
> > > > var FRONTOFFSET=[];
> > > > var barLength=[];
> > > > var keyreleased=[];
> > > >
> > > > function initPianoScroll(){
> > > > for (var p=0;p<20000;p++) {rightSide[p]=0;FRONTOFFSET[p]=0;keyreleased[p]=false;}
> > > > }
> > > >
> > > > function pianoSCROLL(){
> > > > nbrOfEV = track[rectrack].midiMess.length;
> > > > var x=0;
> > > > while (x<nbrOfEV){
> > > > midiEv=x;
> > > > //INSIDE KEY PRESSED
> > > > if(track[rectrack].midiMess[midiEv].data0==NOTE_ON && keyreleased[midiEv]==false){
> > > > console.log("Pressed Key");
> > > > ctm.fillStyle = "magenta";
> > > > ctm.fillRect(50,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)), rightSide[midiEv],keyHeight);
> > > > //When ***A NEW*** key pressed a startvoint relative the scrollbar created ***FRONTOFFSET***
> > > > if(FRONTOFFSET[midiEv]==0) {FRONTOFFSET[midiEv]=scrollBarPos;}
> > > > rightSide[midiEv]=scrollBarPos-FRONTOFFSET[midiEv];
> > > > barLength[midiEv]=rightSide[midiEv]-50;
> > > > }
> > > > //INSIDE KEY RELEASED
> > > >
> > > > else if(track[rectrack].midiMess[midiEv].data0==NOTE_OFF && keyreleased[midiEv]==false){
> > > > keyreleased[midiEv]=true;
> > > > for (var q=midiEv-1;q>=0;q--){
> > > >
> > > > if(track[rectrack].midiMess[q].data1==track[rectrack].midiMess[midiEv].data1) {
> > > > console.log("midiEV data1"+track[rectrack].midiMess[midiEv].data1);
> > > > ctm.fillStyle = "#000a4d";
> > > > ctm.fillRect(50,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)),rightSide[q],keyHeight);
> > > > keyreleased[q]=true;
> > > > break;
> > > > }
> > > > }
> > > > /*
> > > > for(var q=0;q<midiEv;q++){
> > > > if(track[rectrack].midiMess[q].data1==track[rectrack].midiMess[midiEv].data1) {
> > > > console.log("midiEV data1"+track[rectrack].midiMess[midiEv].data1);
> > > > ctm.fillStyle = "#000a4d";
> > > > ctm.fillRect(50,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)),rightSide[q],keyHeight);
> > > > keyreleased[q]=true;
> > > > }
> > > > keyreleased[midiEv]=true;
> > > > }
> > > > */
> > > > }
> > > > //INSIDE MOVE BAR
> > > > else if(track[rectrack].midiMess[midiEv].data0==NOTE_ON && keyreleased[midiEv]==true){
> > > > z=midiEv+1;
> > > > while(z<nbrOfEV){
> > > > //console.log("z= "+z+" midiEv= "+midiEv+" Avar "+ track[rectrack].midiMess[z].data1+" Bvar "+track[rectrack].midiMess[midiEv].data1);
> > > > if(track[rectrack].midiMess[z].data1==track[rectrack].midiMess[midiEv].data1){
> > > > ctm.fillStyle = "#000a4d";
> > > > ctm.fillRect(scrollBarPos-FRONTOFFSET[midiEv]-barLength[midiEv]-6,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)),scrollBarPos-FRONTOFFSET[midiEv]+6 ,keyHeight+1);
> > > > ctm.fillStyle = "white";
> > > > ctm.fillRect(scrollBarPos-FRONTOFFSET[midiEv]-barLength[midiEv],(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)), scrollBarPos-FRONTOFFSET[midiEv],keyHeight);
> > > > break;
> > > > }
> > > > z++;
> > > > }
> > > > }
> > > > x++;
> > > > }
> > > > }
> > >
> > > I fixed the annoying bad rendering stripes, so could please someone at least throw an idea howto step around this annoying "double adding pixels to canvas?" at "lowlevel?" bug, because i can't even think out something to avoid it. Is this related to hardware or software?
> > >
> > > var midiEv=0;
> > > var rightSide=[];
> > > var FRONTOFFSET=[];
> > > var barLength=[];
> > > var keyreleased=[];
> > >
> > > function initPianoScroll(){
> > > for (var p=0;p<20000;p++) {rightSide[p]=0;FRONTOFFSET[p]=0;keyreleased[p]=false;}
> > > }
> > >
> > > function pianoSCROLL(){
> > > nbrOfEV = track[rectrack].midiMess.length;
> > > var x=0;
> > > while (x<nbrOfEV){
> > > midiEv=x;
> > > //INSIDE KEY PRESSED
> > > if(track[rectrack].midiMess[midiEv].data0==NOTE_ON && keyreleased[midiEv]==false){
> > > console.log("Pressed Key");
> > > ctm.fillStyle = "magenta";
> > > ctm.fillRect(50,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)), rightSide[midiEv],keyHeight);
> > > //When ***A NEW*** key pressed a startvoint relative the scrollbar created ***FRONTOFFSET***
> > > if(FRONTOFFSET[midiEv]==0) {FRONTOFFSET[midiEv]=scrollBarPos;}
> > > rightSide[midiEv]=scrollBarPos-FRONTOFFSET[midiEv];
> > > barLength[midiEv]=rightSide[midiEv]-50;
> > > }
> > > //INSIDE KEY RELEASED
> > >
> > > else if(track[rectrack].midiMess[midiEv].data0==NOTE_OFF && keyreleased[midiEv]==false){
> > > keyreleased[midiEv]=true;
> > > for (var q=midiEv-1;q>=0;q--){
> > >
> > > if(track[rectrack].midiMess[q].data1==track[rectrack].midiMess[midiEv].data1) {
> > > console.log("midiEV data1"+track[rectrack].midiMess[midiEv].data1);
> > > ctm.fillStyle = "#000a4d";
> > > ctm.fillRect(50,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8))-1,rightSide[q],keyHeight+2);
> > > keyreleased[q]=true;
> > > break;
> > > }
> > > }
> > > /*
> > > for(var q=0;q<midiEv;q++){
> > > if(track[rectrack].midiMess[q].data1==track[rectrack].midiMess[midiEv].data1) {
> > > console.log("midiEV data1"+track[rectrack].midiMess[midiEv].data1);
> > > ctm.fillStyle = "#000a4d";
> > > ctm.fillRect(50,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)),rightSide[q],keyHeight);
> > > keyreleased[q]=true;
> > > }
> > > keyreleased[midiEv]=true;
> > > }
> > > */
> > > }
> > > //INSIDE MOVE BAR
> > > else if(track[rectrack].midiMess[midiEv].data0==NOTE_ON && keyreleased[midiEv]==true){
> > > z=midiEv+1;
> > > while(z<nbrOfEV){
> > > if(track[rectrack].midiMess[z].data1==track[rectrack].midiMess[midiEv].data1){
> > > ctm.fillStyle = "#000a4d";
> > > ctm.fillRect(scrollBarPos-FRONTOFFSET[midiEv]-barLength[midiEv]-6,(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8))-1,scrollBarPos-FRONTOFFSET[midiEv]+6 ,keyHeight+2);
> > > ctm.fillStyle = "white";
> > > ctm.fillRect(scrollBarPos-FRONTOFFSET[midiEv]-barLength[midiEv],(PistartX+keyHeight*88)-(keyHeight*(track[rectrack].midiMess[midiEv].data1-8)), scrollBarPos-FRONTOFFSET[midiEv],keyHeight);
> > > break;
> > > }
> > > z++;
> > > }
> > > }
> > > x++;
> > > }
> > > }
> >
> > When there finally is a thing to go analretentive over you guys don't want anything to do with it. I guess your besserwisser attitude just faked.
> > Come on give me a lesson, show me how it is done LoL
>
> You are not much of bug fixers in the "javascript engine" are you?
https://www.youtube.com/watch?v=mnTX2p22CWs
Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 18:14 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 18:17 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 18:28 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 18:36 -0700
Re: Advanced logic "measure a bar" "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-09-18 19:38 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 19:59 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 20:11 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 20:42 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 21:00 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-18 21:02 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-19 08:18 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-19 08:19 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-19 08:23 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-20 14:38 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-21 02:14 -0700
Re: Advanced logic "measure a bar" John G Harris <niam@jghnorth.org.uk.invalid> - 2019-09-21 10:35 +0100
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-21 05:17 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-21 05:29 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-22 04:52 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-22 12:32 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-23 00:38 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 05:17 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 05:18 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 05:21 -0700
Re: Advanced logic "measure a bar" Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-09-24 13:14 -0600
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 12:30 -0700
Re: Advanced logic "measure a bar" Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-09-24 13:53 -0600
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-24 22:13 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 02:54 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-25 22:32 -0700
Re: Advanced logic "measure a bar" Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-09-30 02:05 -0700
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