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amiller/glass.html

Forked from rajeshbiib/glass.html
Created March 25, 2014 17:52
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[wearscript] AR Warp with circles
Raw
glass.html
<html style="width:100%; height:100%; overflow:hidden">
<body style="width:100%; height:100%; overflow:hidden; margin:0">
<canvas id="offscreen" width="640" height="360" style="display:hidden"></canvas>
<script>
function drawCircle(x, y,tag) {
var width = 640;
var height = 360;
var c = document.getElementById("offscreen");
var ctx = c.getContext("2d");
ctx.fillStyle = 'black'
ctx.fillRect(0, 0, width, height);
for (var i = 0; i < 50; i++) {
ctx.beginPath();
ctx.arc(x,y,10+15*i,0,2*Math.PI);
ctx.closePath();
ctx.strokeStyle = 'red'
ctx.stroke();
}
ctx.font="20px Georgia";
ctx.fillStyle="white"
ctx.fillText(tag,x,y);
var dataURL = c.toDataURL();
return dataURL; // Need to strip prefix?
}
function rangeFromTag(t) {
// Crude distance estimation, based on the focal length of the glass
// camera and the diagonal distance of the AR fiducial. This is only valid
// when looking *head-on* at the the fiducial marker.
var x0 = t[1];
var y0 = t[2];
var x1 = t[5];
var y1 = t[6];
var distPx = Math.sqrt((x0-x1)*(x0-x1) + (y0-y1)*(y0-y1));
var focalLengthPx = 2968.5/8; // Focal length, for 640x360 view
var distMeters = 0.287; // Diagonal size of AR tags printed out.
var rangeMeters = distMeters * focalLengthPx / distPx;
return rangeMeters;
}
function printTagName(x,y,tag) {
var width = 640;
var height = 360;
WS.log("Tag" + tag);
var c = document.getElementById("offscreen");
var ctx = c.getContext("2d");
ctx.font="20px Georgia";
ctx.fillStyle="white"
ctx.fillText(tag,x,y);
}
function getData() {
var c = document.getElementById("offscreen");
var ctx = c.getContext("2d");
var dataURL = c.toDataURL();
return dataURL; // Need to strip prefix?
}
function printClear() {
var width = 640;
var height = 360;
var c = document.getElementById("offscreen");
var ctx = c.getContext("2d");
ctx.fillStyle = 'blue'
ctx.fillRect(0, 0, width, height);
var dataURL = c.toDataURL();
return dataURL;
}
function cb(h) {
WS.log(h)
}
function HMultPoint(a, b) {
var c = [0, 0, 0];
c[2] = a[6] * b[0] + a[7] * b[1] + a[8];
c[0] = (a[0] * b[0] + a[1] * b[1] + a[2]) / c[2];
c[1] = (a[3] * b[0] + a[4] * b[1] + a[5]) / c[2];
return [c[0], c[1]];
}
function server() {
WS.cameraOn(.5, 360, 640);
WS.displayWarpView();
WS.subscribe('warptags:sample', function (channel, tags) {
printClear();
//if (tags.length) {
WS.say(tags.length + " tags. Range, " + Math.round(rangeToTag(tags[0])*10)/10. + " meters.");
for(var cnt=0;cnt<tags.length;cnt++) {
WS.say(tags[cnt][0]);
var t = tags[cnt];
var x = (t[1] + t[3] + t[5] + t[7]) / 4;
var y = (t[2] + t[4] + t[6] + t[8]) / 4;
printTagName(x, y,tags[cnt][0]);
}
WSRAW.warpSetOverlay(getData().split(',')[1]);
})
function sample() {
setTimeout(function (){
WS.warpGlassToPreviewH(function (H) {
WS.log(JSON.stringify(H));
/*
var pt = HMultPoint(H.h, [640 / 2, 360 / 2]);
WSRAW.warpSetOverlay(drawCircle(pt[0], pt[1]).split(',')[1]);
WS.log(JSON.stringify(pt))
*/
});
}, 1500)
WS.warpPreviewSampleGlass('');
}
WS.dataLog(false, true, .15);
WS.gestureCallback('onGesture', function (gesture) {
if (gesture === 'TAP') {
WS.sound('SUCCESS');
sample();
}
});
}
function main() {
if (WS.scriptVersion(1)) return;
WS.serverConnect('ws://192.168.1.30:8080', 'server');
}
window.onload = main;
</script>
</body>
</html>
Raw
manifest.json
{"name":"AR Warp with circles"}
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