leap/Leap_JavaScript_API_trigger_point.html at master · codeinthesky/leap · GitHub

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<!DOCTYPE html>
<html>
<head>
<title>Leap JavaScript API</title>
<script>
varws;

if((typeof(WebSocket)=='undefined')&&
(typeof(MozWebSocket)!='undefined')){
WebSocket=MozWebSocket;
}


functioninit(){
ws=newWebSocket("ws://localhost:6437/");
ws.onopen=function(event){
document.getElementById("main").style.visibility="visible";
document.getElementById("connection").innerHTML="WebSocket connection open!";
};


varactionStartTime=newDate().getTime();
vartimeThreshold=300;

// is gun ready to be fired?
varcocked;

// co-ordinate corrections for converting tip positon to canvas position
// where canvas top left corner is at (0,0)
// finger tip position at left of range of motion is approx -230
// finger tip position at right of range of motion is approx +230
varXCORRECTION=230;// to be added to tip x position (position[0])
// tip position at top of range of motion is approx 480
// tip position at bottom of range of motion is approx 80
varYCORRECTION=480;// to be substracted from tip y position (position[1])


ws.onmessage=function(event){
varobj=JSON.parse(event.data);
varstr=JSON.stringify(obj,undefined,2);

varposX=XCORRECTION+Math.floor(obj.hands[0].fingers[0].tip.position[0]);
varposY=YCORRECTION-Math.floor(obj.hands[0].fingers[0].tip.position[1]);
document.getElementById("output").innerHTML='<pre>'+"posX:"+posX+" posY:"+posY+'</pre>';


// gun fires when finger count goes from cocked position (2 fingers) to 1 finger.
varfingercount=obj.hands[0].fingers.length;
if(fingercount==2){
cocked=1;// 1 == true
}elseif(fingercount==1){
if(cocked){
// shot fired!
console.log("shot fired at",posX,posY);
}
cocked=0;// 0 == false
}else{
cocked=0;// 0 == false
}
};

ws.onclose=function(event){
ws=null;
document.getElementById("main").style.visibility="hidden";
document.getElementById("connection").innerHTML="WebSocket connection closed";
};
ws.onerror=function(event){
alert("Received error");
};
}
</script>
</head>
<bodyonload="init();">
<h1>Leap JavaScript API</h1>
<divid="connection">WebSocket not connected</div>
<divid="main" style="visibility:hidden">
<p>Frame data:</p>
<divid="output"></div>
</div>
</body>
</html>