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leap-guitar-move.html
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<!doctype html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
<link rel="stylesheet" href="leap-guitar.css">
<script type="text/javascript" src="leap.min.js"></script>
<script type="text/javascript" src="jquery/jquery.js"></script>
<script type="text/javascript" src="js/dat.Gui.min.js"></script>
<script type="text/javascript" src="MIDIBridge/lib/Midibridge.js"></script>
<script type="text/javascript" src="MIDIBridge/lib/Midiselector.js"></script>
<script type="text/javascript" src="js/setup-connections-direct.js"></script>
<script type="text/javascript">
//-------------------------GUI stuff-----------------
var Settings = function()
{
this.maxX = 127;
this.minX = 0;
this.maxY = 127;
this.minY = 0;
this.maxZ = 127;
this.minZ = 0;
this.minMov = 0;
this.maxMov = 90;
this.MIDIchan = 1;
this.Xcont = 0;
this.Ycont = 1;
this.Zcont = 2;
this.Movcont = 4;
this.sensitivity= 3.5;
this.easing = 5;
this.default_vals = false;
this.Xval_when_out = 0;
this.Yval_when_out = 0;
this.Zval_when_out = 0;
this.Extra = 3;
this.Extra_when_out = 0;
this.Extra_when_in = 127;
}
var guitar_on = false;
var guitar_out = true;
var oldX = 0;
var oldY = 0;
var oldZ = 0;
var oldExtra = 0;
var movement = 0;
var oldMove = 0;
var settings = new Settings()
var c = 0;
var ctx = 0;
var leapvars =
{
leapX: 50,
leapY: 50,
leapZ:100,
salv: false
};
var oldPos = new Array();
for (i = 0; i < 15; i++)
{
oldPos.push(leapvars);
}
window.onload = function()
{
var gui = new dat.GUI();
var f1 = gui.addFolder('X');
f1.add(settings, 'Xcont').step(1);
f1.add(settings, 'minX', 0, 126).step(1);
f1.add(settings, 'maxX', 1, 127).step(1);
var f2 = gui.addFolder('Y');
f2.add(settings, 'Ycont').step(1);
f2.add(settings, 'minY', 0, 126).step(1);
f2.add(settings, 'maxY', 1, 127).step(1);
var f3 = gui.addFolder('Z');
f3.add(settings, 'Zcont').step(1);
f3.add(settings, 'minZ', 0, 126).step(1);
f3.add(settings, 'maxZ', 1, 127).step(1);
var fMov = gui.addFolder('movement');
fMov.add(settings, 'Movcont').step(1);
fMov.add(settings, 'minMov', 0, 126).step(1);
fMov.add(settings, 'maxMov', 0, 126).step(1);
fMov.add(settings, 'sensitivity', 0.25, 8).step(0.25);
fMov.add(settings, 'easing', 0, 25).step(1);
var f5 = gui.addFolder('Extra on/off message');
f5.add(settings, 'Extra').step(1);
f5.add(settings, 'Extra_when_out',0,127).step(1);
f5.add(settings, 'Extra_when_in',0,127).step(1);
var f4 = gui.addFolder('Defaults when out of sensor range');
f4.add(settings,'default_vals');
f4.add(settings, 'Xval_when_out',0,127).step(1);
f4.add(settings, 'Yval_when_out',0,127).step(1);
f4.add(settings, 'Zval_when_out',0,127).step(1);
f1.open();
f2.open();
f3.open();
fMov.open();
c=document.getElementById("mycanvas");
ctx=c.getContext("2d");
startLeap();
};
//-------------------------leap stuff-------------------
function startLeap()
{
var controller = new Leap.Controller({enableGestures: true});
var region = new Leap.UI.Region(
[-50, 250, -100],
[200, 350, 100]
);
controller.addStep(new Leap.UI.Cursor())
controller.addStep(region.listener({nearThreshold:50}))
controller.loop(function(frame, done) {
if (frame.cursorPosition) {
leap_enabled = true;
var leapPosition = region.mapToXY(
frame.cursorPosition, 300, 150);
leapvars.leapX = leapPosition[0];
leapvars.leapY = leapPosition[1];
leapvars.leapZ = leapPosition[2]*-1;
guitar_on = true;
guitar_out = false;
}
else
{
guitar_out = true;
if(settings.default_vals)
{
leapvars.leapX = ((settings.Xval_when_out-settings.minX)/settings.maxX-settings.minX)*300;
leapvars.leapY = ((settings.Yval_when_out-settings.minY)/settings.maxY-settings.minY)*150;
leapvars.leapZ = ((settings.Zval_when_out-settings.minZ)/settings.maxZ-settings.minZ)*2;
guitar_on = false;
}
}
done();
});
controller.connection.on('disconnect', function() {
leap_enabled = false;
});
};
//----------------------------MIDI stuff -----------
window.addEventListener('load', function() {
$("#start").click(function(){
if(!output){
messages.innerHTML = "<b>Please select a MIDI output first!</b>";
return;
}
messages.innerHTML = "";
sequencePosition = 0;
runningInterval = setInterval(MIDILoop, Math.round(midispeed));
document.getElementById("stop").classList.add("btn-primary");
document.getElementById("start").classList.remove("btn-primary");
});
$("#stop").click(function()
{
currentNote = sequenceLength;
clearInterval(runningInterval);
document.getElementById("start").classList.add("btn-primary");
document.getElementById("stop").classList.remove("btn-primary");
midiBridge.disconectAll();
});
var midiAccess,
outputs,
output,
midispeed = 33;
currentNote = 0,
sequenceLength = 100,
sequencePosition = 0,
selectOutput = document.getElementById("outputs"),
messages = document.getElementById("messages");
//btnStart = document.getElementById("start"),
//btnStop = document.getElementById("stop");
var screenfps = 60;
drawInterval = setInterval(drawScreen, Math.round(1000/screenfps));
function sendMIDI(port, value)
{
var noteNumber = port;
var velocity = value;
midiMessage = midiAccess.createMIDIMessage(midiBridge.CONTROL_CHANGE, 0, noteNumber, velocity, sequencePosition);
output.sendMIDIMessage(midiMessage);
//console.log(port + " sending value " + value);
};
function MIDILoop()
{
//send for X
velocity = Math.floor((leapvars.leapX/300*(settings.maxX-settings.minX)) + settings.minX); //0-300 to 0-127
if (velocity != oldX)
{
noteNumber = settings.Xcont;
if (velocity > settings.maxX)
{velocity = settings.maxX}
else if (velocity < settings.minX)
{ velocity = settings.minX}
midiMessage = midiAccess.createMIDIMessage(midiBridge.CONTROL_CHANGE, 0, noteNumber, velocity, sequencePosition);
output.sendMIDIMessage(midiMessage);
//console.log("X sending " + velocity + " to port " + settings.Xcont );
oldX = velocity;
}
//send for Y
velocity = Math.floor((leapvars.leapY/150*(settings.maxY-settings.minY)) + settings.minY); //0-150 to 0-127
if (velocity != oldY)
{
noteNumber = settings.Ycont;
if (velocity > settings.maxY)
{velocity = settings.maxY}
else if (velocity < settings.minY)
{ velocity = settings.minY}
midiMessage = midiAccess.createMIDIMessage(midiBridge.CONTROL_CHANGE, 0, noteNumber, velocity, sequencePosition);
output.sendMIDIMessage(midiMessage);
//console.log("Y sending " + velocity + " to port " + settings.Ycont );
oldY = velocity;
}
//send for Z
velocity = Math.floor(((leapvars.leapZ+1)/2*(settings.maxZ-settings.minZ)) + settings.minZ); //0-2 to 0-127
if (velocity != oldZ)
{
noteNumber = settings.Zcont;
if (velocity > settings.maxZ)
{velocity = settings.maxZ}
else if (velocity < settings.minZ)
{ velocity = settings.minZ}
midiMessage = midiAccess.createMIDIMessage(midiBridge.CONTROL_CHANGE, 0, noteNumber, velocity, sequencePosition);
output.sendMIDIMessage(midiMessage);
//console.log("Z sending " + velocity + " to port " + settings.Zcont );
oldZ = velocity;
}
//send for Extra
if (guitar_out != oldExtra)
{
if (guitar_out == true)
{
sendMIDI(settings.Extra, settings.Extra_when_out);
//console.log("extra says guitar out");
oldExtra = false;
}
else
{
sendMIDI(settings.Extra, settings.Extra_when_in);
//console.log("extra says guitar in");
oldExtra = true;
}
}
//send for Move
movement = 0;
//used to divide total by number of segments
var segmentsum = 0;
for (var i = settings.easing; i > -1; i--)
{
movement += getDist(leapvars.leapX, leapvars.leapY, leapvars.leapZ, oldPos[i].leapX, oldPos[i].leapY, oldPos[i].leapZ);
segmentsum += i+1;
}
movement = movement/(segmentsum)*settings.sensitivity; //if easing = 0 it´s /1 ...all good
//movement=getDist(leapvars.leapX, leapvars.leapY, leapvars.leapZ, oldPos[settings.easing].leapX, oldPos[settings.easing].leapY, oldPos[settings.easing].leapZ);
//movement = movement/(settings.easing+1); //if easing = 0 it´s /1 ...all good
velocity = Math.floor((movement/150)*(settings.maxMov-settings.minMov)+settings.minMov);
//console.log("movement: " + movement + " velocity " + velocity + " oldPos length " + oldPos.length + " oldPos[settings.easing].leapZ " + oldPos[settings.easing].leapZ);
if (velocity != oldMove)
{
noteNumber = settings.Movcont;
if (velocity > settings.maxMov)
{velocity = settings.maxMov}
else if (velocity < settings.minMov)
{ velocity = settings.minMov}
midiMessage = midiAccess.createMIDIMessage(midiBridge.CONTROL_CHANGE, 0, noteNumber, velocity, sequencePosition);
output.sendMIDIMessage(midiMessage);
//console.log("Y sending " + velocity + " to port " + settings.Ycont );
oldMove = velocity;
}
var cloneleapvars =
{
leapX: leapvars.leapX,
leapY: leapvars.leapY,
leapZ:leapvars.leapZ,
};
oldPos.unshift(cloneleapvars); //unshift like push but adds to the start of the array
if (oldPos.lenght > 500)
{
oldPos.splice(150,300);
}//keep the array from getting huge and affecting memmory
}
midiBridge.init(function(_midiAccess){
midiAccess = _midiAccess;
outputs = midiAccess.enumerateOutputs();
//create dropdown menu for MIDI outputs and add an event listener to the change event
midiBridge.createMIDIDeviceSelector(selectOutput,outputs,"ouput",function(deviceId){
if(output){
output.close();
}
output = midiAccess.getOutput(outputs[deviceId]);
messages.innerHTML = "connected to " + output.deviceName + "<br/>";
});
});
});
function getDist(x, y, z, oldx, oldy, oldz)
{
var dx = Math.abs(x - oldx);
var dy = Math.abs(y - oldy)*1.5;
var dz = Math.abs(z - oldz)*200;
//return Math.sqrt(Math.pow(dx,2)+Math.pow(dy,2));
var plaindist = Math.sqrt(Math.pow(dx,2)+Math.pow(dy,2));
return Math.sqrt(Math.pow(plaindist,2)+Math.pow(dz,2));
}
//---------------------DRAW------------------------------
function drawScreen()
{
leap_drawScreen();
var imgX = leapvars.leapX;
var imgY = leapvars.leapY;
var imgZ = (leapvars.leapZ*-1) + 1;
if(guitar_out)
{
ctx.fillStyle='red';
ctx.font="16px Arial";
ctx.fillText('Guitar out of sensor range', 50, c.height/2);
}
var bval = 80;
if (guitar_on)
{
var rval = Math.floor(Math.abs(leapvars.leapZ*leapvars.leapZ)*100) + 30;
if (rval > 99)
{
rval = 99
}
var hsh = "#";
var rd = hsh.concat(bval,rval,rval);
ctx.fillStyle=rd;
//console.log(rd);
}
else
{
ctx.fillStyle='#00CCFF';
}
ctx.strokeStyle = "#000";
ctx.beginPath();
ctx.arc(imgX,imgY,12*(imgZ+0.1),0,2*Math.PI);
ctx.closePath();
ctx.fill();
//movement strength bar
ctx.beginPath();
ctx.fillStyle = "#8E0000";
var barlen = (oldMove/settings.maxMov)*c.height;
//console.log("movement " + oldMove + " barlen " + barlen);
ctx.fillRect(c.width-12,c.height-barlen, c.width,c.height);
ctx.closePath();
ctx.fill();
//console.log("X:" + leapvars.leapX + "Y: " + leapvars.leapY);
//console.log("Z: " + imgZ + " X:" + imgX + " Y: " + imgY);
}
function leap_drawScreen()
{
ctx.fillStyle = "rgba(0, 0, 0, 0.1)";
ctx.fillRect(0,0,c.width,c.height);
ctx.fill();
ctx.fillStyle = "rgba(0, 0, 0, 1)";
ctx.fillRect(c.width-12,0, c.width,c.height);
ctx.fill();
}
</script>
</head>
<body>
<div class="span3" id="cont1">
<div id="logobox" class="span3">
<img id="logo" src="logo.png">
</div>
<div id="rules" class="span3">
<h4> Press <b>Start</b> and this app will send a stream of MIDI messages to MIDI Port 1. </h4>
<p>
The <a href="http://www.leapmotion.com" target="_blank">Leap Motion Sensor</a> can detect your guitar's head as if it were a hand. <br>
X, Y and Z coordinates of your guitar are sent in 3 separate MIDI modulation messages that you can then open in Reason, MAX, GuitarRig, FL Studio or whatever you prefer and map to any variable you want.
<br>
<i>(port1, Xcont, Leap X Coordinate)</i>
</p>
<p>
<b>App Variations:</b>
<ul>
<a href="index.html"><li>Basic</li></a>
<a href="halfX.html"><li>Dual pitch bend</li></a>
<a href="leap-drums.html"><li>For drummers</li></a>
</ul>
</p>
<div id="signature">
<p>App by: <a href="http://nearnshaw.github.com" target="blank">Nicolas Earnshaw</a></p>
</div>
</div>
<div id="clarific" class="span3">
<div id="messages"><b>Select a MIDI output</b></div>
<br>
<!-- dropdown menu for selecting a MIDI output -->
<select id="outputs"></select>
<!-- button that starts the sequence -->
<a id="start" class="btn btn-primary btn-medium pull-left">
Start
</a>
<!-- button that stops the sequence -->
<a id="stop" class="btn btn-medium pull-left" style="margin-left:7px">
Stop
</a>
</div>
</div>
<div id="cont" class="span6">
<canvas id="mycanvas" ></canvas>
<div id ="extrainst" class= "span7">
<div class="">
<p> In this version, the guitar's moving speed will be sent as an extra MIDI variable. Through easing you can make changes less abrupt and through sensitivity you can magnify or reduce the imact of your movements. <a src= "http://www.youtube.com/watch?v=NnATgr5yNEA">Watch a video demo!</a></p>
</div>
<div class="">
</div>
</div>
</div>
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