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pat.js
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(function(exports, $container){
function MM(beatsPerLoop, beatsPerMinute){
this.beatsPerLoop = beatsPerLoop
this.beatsPerMinute = beatsPerMinute
this._loops = {}
this._stop = false
}
MM.prototype = {
add: function(name, beats){
this._loops[name] = beats.split(' ')
return this
},
remove: function(name){
delete this._loops[name]
},
list: function(){
var count = 0;
for (key in this._loops) {
console.log(key + ': ' + this._loops[key].join(' '));
count++;
}
console.log(count + ' loop(s)');
},
clear: function(){
this._loops = {}
},
stop: function(){
this._stop = true
},
start: function(){
this._stop = false
superloop(0, superloops.beatsPerLoop, superloops.beatsPerMinute, superloops);
}
}
function playBeat(loop, beat) {
if(loop[beat] !== '-'){
var e = jQuery.Event("keydown");
try {
e.which = loop[beat].toUpperCase().charCodeAt(0);
} catch(error) {
console.warn('Typo at beat ' + beat + '');
}
// $("input").val(String.fromCharCode(e.which));
$("html").trigger(e);
}
}
// superloop(0, superloops.beatsPerLoop, superloops.beatsPerMinute, superloops);
function superloop(beat, bpl, bpm, SL) {
_.each(SL._loops, function(loop) {
playBeat(loop, beat);
});
if (SL._stop)
return
setTimeout(function(){
var nextBeat = (beat+1)%bpl;
superloop(nextBeat, bpl, bpm, SL);
}, (1000 * 60) / bpm);
}
exports.MM = MM;
exports.superloop = superloop
if ($container) {
$container.append('<div style="position:fixed; top: 10px; left: 10px;font-family:helvetica; font-size: 30px;color: white; padding: 20px;background-color: rgba(0,0,0,0.2);border: 5px solid black;">作曲：Helen</div>');
}
})(window, $("html"))
var superloops = new MM(110, 300)
superloops.stop()
var tapMap={
'1':{
key: 'stop',
method: superloops.start
},
'-1':{
key: 'start',
method: superloops.stop
}
}
var tap = -1
$("#start").on('click', function(){
tap = tap * -1
this.innerHTML = tapMap[tap].key;
if(tap==1){
superloops.start()
}else{
superloops.stop()
}
// (tapMap[tap].method)()
})
superloops.add('a',
[
'k k - - o - - -',
'k - - k j - - -',
'k - - - o - - -',
'k - - k j - - -',
'k - - - o - - -',
'k - - k j - - -',
'- - - - - - - -',
'k k - - o - - -',
'k - - k j - - -',
'k - - - o - - -',
'k - - k j - - -',
'k - - - o - - -',
'k - - k j - - -',
'- - - - - - - -',
].join(' ')
)
superloops.add('b', [
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- q w - e - e d',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
].join(' ')
)
superloops.add('c', [
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- - - - - - - -',
'- a s - s - s d',
].join(' ')
)
superloops.add('d', [
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'x - - - - - - -',
'- - - - - - - -',
].join(' ')
)
superloop(0, superloops.beatsPerLoop, superloops.beatsPerMinute, superloops);