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nestedwizard.html
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<body bgcolor=#808080>
<TABLE width=100% height=100%><TR align=center valign=middle><TD>
<table bgcolor=white border=0 cellpadding=0 cellspacing=0>
<tr valign=top>
<td><table>
<tr><td>
<center><canvas id=angleCanvas width=100 height=100</canvas>
<tr><td valign=top width=200 id=datalog>
</table>
<td>
<canvas id=canvas1></canvas>
<td valign=top width=20>
<td valign=top width=180>
<font face=courier>
<div id=palette></div>
<p> <b>drag mouse</b>
<br> move an object
<p> <b>shift+move mouse</b>
<br> turn an object
<p> <b>delete key</b>
<br> delete an object
<p> <b>+ key</b>
<br> toggle big view
<td valign=top width=10>
</table>
</TABLE>
<script src=server/client.js></script>
<script src=js/nestedwizard/things.js></script>
<script src=js/nestedwizard/lib.js></script>
<script src="js/util/peerjs.min.js"></script>
<script>
let xf = t => (t - canvasWidth/2) / (canvasWidth/2) * .45;
let ixf = t => Math.max(-999, Math.min(999, t / .45 * canvasWidth/2 + canvasWidth/2 + .5 >> 0));
// HANDLE PEER TO PEER COMMUNICATION
const peer = new Peer();
clientConnections = {};
peer.on('disconnected', peer.reconnect);
peer.on('open', () => window['peers'].wizardId = peer.id);
peer.on('connection', (dataConnection) => {
clientConnections[dataConnection.peer] = {
open: false,
conn: dataConnection,
};
dataConnection.on('open', () => {
clientConnections[dataConnection.peer].open = true;
window['peers'].clientIds = Object.keys(clientConnections);
})
dataConnection.on('close', () => {
delete clientConnections[dataConnection.peer];
window['peers'].clientIds = Object.keys(clientConnections);
})
dataConnection.on('data', (msg) => {
let client = msg.client;
if (! clientState[client])
clientState[client] = {};
clientState[client].active = 100;
let state = clientState[client];
switch (msg.op) {
case 'event':
let part = msg.part;
let client = msg.event.client;
let hand = msg.event.hand;
let type = msg.event.type;
let p = msg.event.p;
switch (msg.event.type) {
case 'move':
break;
case 'press':
break;
case 'drag':
break;
case 'doublepress':
break;
case 'release':
break;
}
break;
}
})
});
// SET THE SIZE OF THE DISPLAY CANVAS
canvas1.width = canvasWidth;
canvas1.height = canvasWidth;
// DECLARE VARIABLES
let colorIndex = 0, currentColor = 'white',
angleIndex = 0, currentAngle = 0;
let w = canvas1.width, h = canvas1.height;
let id = -1, pp, isEnter = false, isShift = false, isControl = false, isMinus = false, isShowingBig = false;
let clientState = {};
let isAnyObjectInFocus = false;
let addTrackObj = false;
// STANDARD COLORS AND A FUNCTION TO CONVERT RGB TO HEX CODE
let color = 'white brown red orange yellow green blue magenta violet black'.split(' ');
let rgb = [[1,1,1],[.2,.05,.025],[1,0,0],[1,.15,0],[1,1,0],[0,.5,0],[0,.25,1],[.25,0,1],[1,0,.25],[0,0,0]];
let hx1 = n => '0123456789abcdef'.charAt(n);
let hx2 = n => hx1(n>>4) + hx1(n&15);
let hx3 = r => hx2(255 * Math.sqrt(r) >> 0);
let hex = rgb => '#' + hx3(rgb[0]) + hx3(rgb[1]) + hx3(rgb[2]);
// SHOW THE COLOR PALETTE
let s = ' <br><b>KEY TO SET COLOR</b>';
s += '<table><tr><td> <td><table bgcolor=#d0d0d0><tr><td><big>';
for (let n = 0 ; n < 10 ; n++)
s += '<font color=' + hex(rgb[n]) + '>' + n + '</font>';
s += '</table></table><p>';
currentColor = hex(rgb[0]);
// LIST THE OBJECT SHAPES
s += '<table><tr><td><b><center>KEY TO ADD OBJECT</center></b>';
let ch = 65;
for (let name in things)
s += ' ' + String.fromCharCode(ch++)
+ ' ' + name.replace('_',' ') + ' </font><br>';
s += '</table>';
palette.innerHTML = s;
// CONNECT TO THE SERVER
let server = new Server(2024);
server.alwaysLoadFromStorage();
server.init('nested', {});
server.init('peers', {});
let objects = {};
// CHANGE THE CURRENT ANGLE BY SOME DELTA
let changeAngle = (angle, delta) => (3600 + angle + delta) % 360;
let turn = delta => currentAngle = changeAngle(currentAngle, delta);
// CHANGE THE CURRENT COLOR
let setColor = rgb => {
currentColor = hex(rgb);
let id = find().id;
let obj = objects[id];
if (obj)
obj.color = currentColor;
}
let isAnyoneLookingAtTheTable = () => {
for (let client in clientState)
if (isOnTable(clientState[client].head))
return true;
return false;
}
// ADD A NEW OBJECT OF A SPECIFIED SHAPE AT THE CURSOR
let addObject = (name, client) => {
// FIND AN UNUSED ID
let id = 0;
for ( ; id < 100 ; id++)
if (objects[id] === undefined)
break;
// FIND WHERE TO PLACE THE NEW OBJECT
let p = pp;
if (client !== undefined && clientState[client]) {
let checkPart = part => {
if (! isOnTable(p))
p = findAt(clientState[client][part]).p;
}
checkPart('left');
checkPart('right');
checkPart('head');
}
p = isOnTable(p) ? p : pp;
// ADD THE OBJECT TO THE MODEL
objects[id] = {
type : name,
x : p.x+.5>>0,
y : p.y+.5>>0,
z : 0,
color : currentColor,
angle : currentAngle,
quaternion: { x:0, y:0, z:0, w:1 }
}
nested.objects = objects;
}
let unpackInfo = (string, lo, hi) => {
if (lo === undefined) {
lo = 0;
hi = 1;
}
else if (hi === undefined) {
hi = lo;
lo = 0;
}
let C = " !#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~";
let unpack = (a, b) => (C.indexOf(a) + C.indexOf(b) / 92) / 92;
let a = [];
for (let n = 0 ; n < string.length ; n += 2)
a.push(lo + (hi-lo) * unpack(string.charAt(n), string.charAt(n+1)));
return a;
}
let quatToEuler = (q) => {
let x = q.x;
let y = q.z;
let z = q.y;
let w = q.w;
let yaw = Math.atan2(2 * (w * z + x * y), 1 - 2 * (y * y + z * z));
let angle = yaw * (180 / Math.PI);
return angle;
};
// RESPOND TO KEYBOARD EVENTS
let kc = [0,0,0,0,0,0,0,0,0,0];
let mixColors = () => {
let c = [0,0,0], n = 0;
for (let i = 0 ; i < kc.length ; i++)
if (kc[i]) {
for (let j = 0 ; j < 3 ; j++)
c[j] += 1 - rgb[i][j];
n++;
}
setColor([1 - c[0]/n, 1 - c[1]/n, 1 - c[2]/n]);
for (let i = 0 ; i < kc.length ; i++)
kc[i] = 0;
}
document.addEventListener('keydown', e => {
switch (e.key) {
case 'Enter':
isEnter = true;
break;
case 'Shift':
isShift = true;
id = findAt(pp).id;
break;
case 'Control':
isControl = true;
break;
case '-':
isMinus = true;
break;
}
if (e.keyCode >= 48 && e.keyCode < 58)
kc[e.keyCode - 48] = 1;
});
document.addEventListener('keyup', e => {
switch (e.key) {
case 'Enter':
isEnter = false;
pp = {x:w/2, y:h/2};
break;
case 'Shift':
isShift = false; id = -1;
break;
case 'Control':
isControl = false;
break;
case '-':
isMinus = false;
break;
case '=':
isShowingBig = ! isShowingBig;
break;
case 'Backspace':
let i = findAt(pp).id;
if (i >= 0)
delete objects[i];
break;
default:
// IF RELEASING A NUMBER KEY
if (e.keyCode >= 48 && e.keyCode < 58) {
let id = e.keyCode - 48;
// DELETE AN OBJECT IF HOLDING DOWN THE '-' KEY
if (isMinus)
delete objects[id];
// ELSE MIX COLORS BY COMBINING NUMBER KEYS
else {
kc[id] = 2;
let nDown = 0;
for (let i = 0 ; i < 10 ; i++)
nDown += kc[i] == 1;
if (nDown == 0)
mixColors();
}
}
// ELSE TYPE A LETTER KEY TO ADD AN OBJECT
else {
let n = 0, i = e.keyCode - 65;
for (let name in things)
if (n++ == i) {
addObject(name, clientID);
break;
}
}
break;
}
});
// GET THE (X,Y) POSITION ON THE CANVAS FOR THIS EVENT
let getP = e => {
let r = canvas1.getBoundingClientRect();
return { x: e.clientX - r.left, y: e.clientY - r.top };
}
// DETERMINE WHETHER A PIXEL IS ON THE TABLE
let isOnTable = p => p && p.x >= w/6 && p.x < 5*w/6 && p.y >= h/6 && p.y <= 5*h/6;
// DETERMINE WHETHER A PIXEL IS WITHIN AN OBJECT
let isWithin = (obj, p) => {
let x = obj.x, y = obj.y, angle = obj.angle, thing = things[obj.type];
let c = Math.cos(-angle * Math.PI / 180);
let s = Math.sin(-angle * Math.PI / 180);
if (thing.items.length == 0) {
let x = p.x - obj.x;
let y = p.y - obj.y;
let px = c * x + s * y + obj.x;
let py = -s * x + c * y + obj.y;
return false;
}
// ROTATE THE PIXEL AROUND THE OBJECT'S CENTER OPPOSITE TO THE OBJECT'S ROTATION
let M = [ c, -s, s, c, x-c*x-s*y, y+s*x-c*y ];
let X = M[0] * p.x + M[2] * p.y + M[4];
let Y = M[1] * p.x + M[3] * p.y + M[5];
// RETURN TRUE IF THE PIXEL IS IN ANY OF THE OBJECT'S COMPONENT SHAPES
let scale = w/2 * thingsScale;
for (let n = 0 ; n < thing.items.length ; n++) {
let item = thing.items[n];
let x = scale * item.m[0] + obj.x;
let y = scale * item.m[2] + obj.y;
let w = scale * item.s[0];
let h = scale * item.s[2];
switch (item.type) {
case 'cube':
if (X >= x-w && X < x+w && Y > y-h && Y < y+h)
return true;
break;
case 'tubeY':
case 'sphere':
let dx = (X - x) / w;
let dy = (Y - y) / h;
if (dx * dx + dy * dy < 1)
return true;
break;
}
}
return false;
}
// FIND WHICH OBJECT IS AT A PIXEL
let findAt = p => {
if (isOnTable(p))
for (let id in objects)
if (isWithin(objects[id], p))
return { id: id, p: p };
return { id: -1, p: p };
}
// FIND WHICH OBJECT IS AT A PART OF A CLIENT
let findPartOfClient = (part, client) => {
let found = findAt(clientState[client][part]);
if (found.id >= 0)
found.client = client;
return found;
}
// FIND WHICH OBJECT IS AT A PART OF EITHER ONE OR ALL CLIENTS
let findPart = (part, client) => {
if (client !== undefined && clientState[client] !== undefined)
return findPartOfClient(part, client);
let found = { id: -1, p: { x: 0, y: 0 }, client: -1 };
for (let client in clientState)
if ((found = findPartOfClient(part, client)).id >= 0)
break;
return found;
}
// FIND WHICH OBJECT IS AT ANY PART OF A CLIENT
let find = client => {
let found = { id: findAt(pp).id, p: pp };
if (found.id == -1) found = findPart('left' , client);
if (found.id == -1) found = findPart('right', client);
if (found.id == -1) found = findPart('head' , client);
return found;
}
// ----------------------------------- RESPOND TO MOUSE EVENTS
// ON MOUSE DOWN, TRY TO SELECT AN OBJECT
let isMouseDown = false;
canvas1.onmousedown = e => {
isMouseDown = true;
id = find().id;
if (id == -1)
clientState[clientID].left = getP(e);
}
// ON MOUSE MOVE, DO LOTS OF THINGS
canvas1.onmousemove = e => {
let p = getP(e);
clientState[clientID].left = p;
// HANDLE INTERACTION WITH OBJECTS
let obj = objects[isShift && id>=0 ? id : find().id]; // IF SHIFT USE SELECTED OBJECT,
// ELSE USE OBJECT AT THE CURSOR
if (obj) { // IF AN OBJECT IS SELECTED
currentAngle = obj.angle; // THEN SET CURRENT ANGLE AND COLOR TO MATCH IT
currentColor = obj.color;
}
if (objects[id] !== undefined) { // IF THERE IS A SELECTED OBJECT
let obj = objects[id];
if (isShift) { // THEN IF SHIFT KEY IS DOWN
turn(p.x - pp.x);
obj.angle = currentAngle; // THEN ROTATE SELECTED OBJECT
}
else { // ELSE TRANSLATE SELECTED OBJECT
let x = obj.x + p.x - pp.x;
let y = obj.y + p.y - pp.y;
if (isOnTable({x: x, y: y})) {
obj.x = x;
obj.y = y;
}
}
window.grabbedObj = id;
}
else if (isShift) // ELSE IF SHIFT KEY IS DOWN
turn(p.x - pp.x); // THEN ROTATE CURRENT ANGLE
pp = p;
}
// ON MOUSE UP, UNSELECT OBJECT
canvas1.onmouseup = e => {
isMouseDown = false;
window.grabbedObj = null;
id = -1;
}
// -----------------------------------
// RETURN BLACK OR WHITE -- WHICHEVER IS MOST DIFFERENT FROM COLOR ARG
let blackOrWhite = color => {
let h = 0;
for (let k = 0 ; k < 3 ; k++) {
let c = color.charCodeAt(2*k+1);
h += (c < 64 ? c-48 : c-96+10) * (k==0 ? 1 : k==1 ? 1.3 : .7);
}
return h > 30 ? 'black' : 'white';
}
// DRAW SOMETHING WITH A TRANSLATION + ROTATION
let rotatedDrawing = (ctx,x,y,angle,drawingProc) => {
let c = Math.cos(angle * Math.PI / 180);
let s = Math.sin(angle * Math.PI / 180);
ctx.save();
ctx.setTransform(c, -s, s, c, x-c*x-s*y, y+s*x-c*y);
drawingProc();
ctx.restore();
}
// DRAW ONE ANIMATION FRAME
const onFrame = () => {
requestAnimationFrame(onFrame);
let time = Date.now() / 1000;
if (peer.open) {
window['peers'].wizardId = peer.id;
window['peers'].clientIds = Object.keys(clientConnections);
} else {
delete window['peers']['wizardId'];
delete window['peers']['clientIds'];
}
server.broadcastGlobal('peers');
if (window.clientID !== undefined && clientState[clientID] === undefined)
clientState[clientID] = {};
//---------------- GATHER UPDATED STATE DATA TO SHARE WITH CLIENTS
if (nested.objects)
objects = nested.objects;
// WHAT OBJECT, IF ANY, IS IN FOCUS FOR EACH CLIENT?
isAnyObjectInFocus = false;
nested.focus = {};
for (let client in clientState) {
let ids = {}, found;
for (let part in clientState[client])
if ((found = findAt(clientState[client][part])).id >= 0)
ids[part] = found.id;
if (Object.keys(ids).length > 0) {
nested.focus[client] = ids;
isAnyObjectInFocus = true;
}
}
// ADD AVATARS TO THE STATE DATA
nested.avatars = {};
for (let client in clientState)
nested.avatars[client] = clientState[client].avatar;
// SEND THE CURRENT STATE TO EVERY CLIENT
Object.values(clientConnections).forEach((client) => {
const {focus, objects} = window.nested;
client.conn.send({focus, objects});
})
//---------------- INCORPORATE STATE DATA FROM CLIENTS
server.sync('nested', msgs => {
if (Object.keys(nested).length > 0 && nested.objects)
objects = nested.objects;
});
// MAKE PEOPLE AND CREATURES MOVE
let turnAwayFrom = (obj, p) => {
let dx = p.x - obj.x;
let dy = p.y - obj.y;
let d = Math.sqrt(dx * dx + dy * dy);
if (d < .15 * w) {
let dir = Math.atan2(dx, dy) * 180 / Math.PI;
while (dir - obj.angle > 180) dir -= 360;
while (obj.angle - dir > 180) dir += 360;
let da = dir - obj.angle;
let s = Math.sign(da);
da = Math.abs(da);
if (da < 150)
obj.angle = changeAngle(obj.angle, -.03 * s * Math.max(da, 10));
}
}
for (let id in objects) {
let obj = objects[id];
if (obj.type == 'guy' || obj.type == 'gal' || obj.type == 'duck') {
if (window.grabbedObj == id)
continue;
obj.x += Math.sin(obj.angle * Math.PI / 180);
obj.y += Math.cos(obj.angle * Math.PI / 180);
for (let i in objects)
if (i != id)
turnAwayFrom(obj, objects[i]);
let x = obj.x / (w/2) - 1;
let y = obj.y / (w/2) - 1;
let r = Math.sqrt(x * x + y * y);
let edgePoint = { x: w/2 * (x / r + 1),
y: w/2 * (y / r + 1) };
turnAwayFrom(obj, edgePoint);
let xd = (obj.x - canvasWidth/2);
let yd = (obj.y - canvasWidth/2);
if (Math.sqrt(xd*xd+yd*yd)>canvasWidth/2) {
obj.x = canvasWidth/2;
obj.y = canvasWidth/2;
}
}
}
// ADD DISK DRAWING METHODS TO A CANVAS 2D DRAWING CONTEXT
let addMethods = ctx => {
ctx.strokeDisk = (x,y,r) => { ctx.beginPath(); ctx.arc(x,y,r,0,2*Math.PI); ctx.stroke(); }
ctx.fillDisk = (x,y,r) => { ctx.beginPath(); ctx.arc(x,y,r,0,2*Math.PI); ctx.fill (); }
return ctx;
}
// LIST THE LOCATIONS OF ALL ACTIVE OBJECTS AND CLIENTS ON THE WEB PAGE
let pad = t => {
t >>= 0;
return t > 99 ? t : t > 9 ? ' ' + t : '  ' + t;
}
let s = '<TABLE><TR><TD><font face=helvetica>';
s += '<table cellspacing=0 cellpadding=3>';
s += '<tr><td><td width=79><th align=right><font face=courier>x y rot';
for (let id in objects) {
let obj = objects[id];
let fc = '<font color=' + obj.color + '>';
s += '<tr>'
+ '<td valign=top><font color=black>' + id
+ '<td valign=top><font color=black>' + obj.type.replace(' ','_')
+ '<td><center><table cellpadding=0 cellspacing=0 border=1 bordercolor='
+ obj.color + '><tr><td><font face=courier>' + pad(obj.x) + ' ' + pad(obj.y) + ' ' + pad(obj.angle)
+ '</table></center>';
}
s += '</table>';
s += '<br></TABLE><font face=helvetica>';
s += '<b> CLIENTS</b><p>';
s += '<table cellspacing=0><tr><th width=15> <th width=60>left<th width=60>right<th width=60>head';
for (let client in clientState) {
let state = clientState[client];
if (! state.left || ! state.right)
continue;
let fc = '<font color=' + color[client] + '>';
s += '<tr bgcolor=#d0d0d0>'
+ '<td align=center><small>' + fc + client
+ '<td align=center><small>' + fc + state.left.x + ',' + state.left.y
+ '<td align=center><small>' + fc + state.right.x + ',' + state.right.y
+ '<td align=center><small>' + fc + (state.head ? state.head.x : '---')
+ ',' + (state.head ? state.head.y : '---')
+ '<br></small>';
}
s += '</table></TABLE>';
datalog.innerHTML = s;
// DRAW THE ANGLE+COLOR INDICATOR
let x = 50, y = 53;
let actx = addMethods(angleCanvas.getContext('2d'));
actx.fillStyle = currentColor;
actx.fillDisk(x,y,40);
actx.strokeStyle = 'black';
actx.stroke();
actx.fillStyle = blackOrWhite(currentColor);
rotatedDrawing(actx, x,y,currentAngle, () => {
actx.beginPath();
actx.moveTo(x-10,y-30);
actx.lineTo(x+10,y-30);
actx.lineTo(x,y+33);
actx.fill();
});
// DRAW THE BACKGROUND
let ctx = addMethods(canvas1.getContext('2d'));
ctx.fillStyle = '#404040';
ctx.fillRect(0,0,w,h);
ctx.font = '20px Helvetica';
ctx.fillStyle = 'white';
ctx.textAlign = 'left';
ctx.fillText(isOnTable(pp) ? 'ON TABLE' : 'OFF TABLE', 5, 24);
// DRAW THE TABLE
ctx.fillStyle = '#d0d0d0';
ctx.fillRect(w/6,h/6,2*w/3,2*h/3);
let w8 = 2*w/3 / 8;
ctx.fillStyle = '#a8a8a0';
ctx.fillRect(w/2-w8/2,h/2-w8/2,w8,w8);
let x0 = w/6, x1 = 5*w/6;
for (let x = x0 ; x <= x1 ; x += (x1-x0)/3) {
ctx.fillRect(x,0,1,w);
ctx.fillRect(0,x,w,1);
}
// DRAW ALL THE OBJECTS
let textHeight = 12;
ctx.textAlign = 'center';
ctx.textVerticalAlign = 'center';
ctx.fillStyle = currentColor;
let found = findAt(pp);
for (let id in objects) {
// DRAW EACH OBJECT AS A SET OF COLORED ROTATED POLYGONS
let obj = objects[id];
let thing = things[obj.type];
let scale = w/2 * thingsScale;
let drawFunction = () => {
for (let n = 0 ; n < thing.items.length ; n++) {
let item = thing.items[n];
let X = zoom * scale * item.m[0] + zoom * (obj.x - w/2) + w/2;
let Y = zoom * scale * item.m[2] + zoom * (obj.y - h/2) + h/2;
let W = zoom * scale * item.s[0];
let H = zoom * scale * item.s[2];
ctx.lineWidth = id == found.id ? 4 : 2;
ctx.strokeStyle = obj.color + (zoom == 1 ? '' : '60');
switch (item.type) {
case 'cube':
ctx.strokeRect(X-W,Y-H,2*W,2*H);
break;
case 'tubeY':
case 'sphere':
ctx.beginPath();
ctx.ellipse(X,Y,W,H,0,0,2*Math.PI);
ctx.stroke();
break;
}
}
}
let zoom = 1;
rotatedDrawing(ctx, obj.x, obj.y, obj.angle, drawFunction);
if (isShowingBig) {
zoom = 8;
let ox = obj.x - w/2;
let oy = obj.y - w/2;
let c = Math.cos(obj.angle * Math.PI / 180);
let s = Math.sin(obj.angle * Math.PI / 180);
obj.x = w/2 + c * ox - s * oy;
obj.y = w/2 + s * ox + c * oy;
rotatedDrawing(ctx, w/2, w/2, obj.angle, drawFunction);
obj.x = ox + w/2;
obj.y = oy + w/2;
}
// DRAW THE OBJECT'S SHAPE LABEL
if (obj.type) {
let textHeight = id==found.id ? 15 : 12;
ctx.font = textHeight + 'px Courier';
ctx.fillStyle = 'black';
let lines = obj.type.split(' ');
let y = n => (textHeight + 2) * (n + 3/4 - lines.length/2);
for (let n = 0 ; n < lines.length ; n++)
ctx.fillText(lines[n],obj.x,obj.y+y(n));
}
}
// SHOW THE CLIENT STATE FOR ALL CLIENTS
for (let client in clientState) {
// REMOVE ANY INACTIVE CLIENTS
if (--clientState[client].active == 0) {
delete clientState[client];
continue;
}
// SHOW POSITIONS OF LEFT, RIGHT, HEAD FOR THIS CLIENT
let state = clientState[client];
for (let part in state) {
let isPressed = state['isPressed' + part];
ctx.fillStyle = hex(rgb[client]) + '40';
let r = w/2 / 50;
let event = state[part];
switch (part) {
case 'head':
ctx.fillRect(event.x - .35*r, event.y - 2*r, .7*r, 4*r);
ctx.fillRect(event.x - 2*r, event.y - .35*r, 4*r, .7*r);
break;
case 'left':
case 'right':
if (isPressed || isMouseDown) {
ctx.fillStyle = hex(rgb[client]) + '80';
r *= .75;
}
ctx.fillDisk(event.x, event.y, 2*r, 2*r);
break;
}
}
}
}
requestAnimationFrame(onFrame);
</script>