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teletap
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first test audio api

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km0 2 years ago
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.gitignore vendored
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node_modules/
.env
package-lock.json

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README.md
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# Teletap
A small playground for networked sound experiments with Web Audio API.
## Setup
Clone the repo , move to the directory and install the dependencies using your favourite package manager ([npm](https://www.npmjs.com/), [yarn](https://yarnpkg.com/), etc.).
Note that to run the app you will need to install [Node.js](https://nodejs.org/en/), either on your machine or on a VPS.
For example with npm:
```
git clone https://git.xpub.nl/kamo/drw
cd drw
npm install
```
To start the application run
`node server.js`
or in alternative
`npm start`
Then open your browser to `localhost:3000` and there you can tap on the screen to generate sounds..
If you open another tab and navigate to `localhost:3000/destination`, there you will receive the sounds. Note that you will not hear anything until you press on the `Join Audio` button. This is because for security policies, browsers don't play any sound before a user's interaction.
This app uses the same architecture of [DRw](https://git.xpub.nl/kamo/drw). Find more info there!

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package.json
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{
"name": "sal8",
"version": "1.0.0",
"description": "collective drawings",
"main": "server.js",
"scripts": {
"start": "node server.js"
},
"author": "",
"license": "ISC",
"dependencies": {
"dotenv": "^16.0.3",
"express": "^4.18.2",
"hbs": "^4.2.0",
"ws": "^8.11.0"
}
}

131
public/audioDestination.js
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const audioContext = new AudioContext();
const tap = document.querySelector('.container')
const address = document.querySelector('#address').innerHTML
const socket = new ReconnectingWebSocket(
location.origin.replace(/^http/, "ws") + address
);
socket.onopen = (event) => {
socket.send(JSON.stringify({ type: "hello" }));
console.log("Connected as destination!");
};
let noiseDuration = 0.05
const playNoise = (bandHz = 1000, time = 0) => {
const bufferSize = audioContext.sampleRate * noiseDuration
// Create an empty buffer
const noiseBuffer = new AudioBuffer({
length: bufferSize,
sampleRate: audioContext.sampleRate,
})
// Fill the buffer with noise
const data = noiseBuffer.getChannelData(0);
for (let i = 0; i < bufferSize; i++) {
data[i] = Math.random() * 2 - 1;
}
// Create a buffer source from data
const noise = new AudioBufferSourceNode(audioContext, {
buffer: noiseBuffer,
})
// Filter the output
const bandpass = new BiquadFilterNode(audioContext, {
type: "bandpass",
frequency: bandHz
})
noise.connect(bandpass).connect(audioContext.destination);
noise.start(time);
}
const playPulse = (freq=440, lfoFreq=30, duration=1, time=0) => {
const osc = new OscillatorNode(audioContext, {
type: "square",
frequency: freq
})
const amp = new GainNode(audioContext, {
value: 0
})
const lfo = new OscillatorNode(audioContext, {
type: "sine",
frequency: lfoFreq
})
lfo.connect(amp.gain)
osc.connect(amp).connect(audioContext.destination)
lfo.start()
osc.start(time)
// osc.stop(time + duration)
}
const spawnGradient = (x, y) => {
const gradient = document.createElement('div')
gradient.classList.add('gradient')
gradient.style.translate = `${x}px ${y}px`
gradient.style.scale = 0
let red = x / tap.clientWidth * 255
let green = y / tap.clientHeight * 255
let blue = 0
gradient.style.background = `radial-gradient(circle, rgba(${red},${green},${blue},1) 0%, rgba(${red},${green},${blue},0) 25%)`
tap.appendChild(gradient)
grow(gradient)
}
const grow = (el) => {
let scale = Number(el.style.scale) || 0
el.style.scale = scale + 0.1
requestAnimationFrame(()=> grow(el))
}
const emit = (x, y) => {
playPulse(x, y * 0.01)
spawnGradient(x, y)
}
const join = document.querySelector('#join')
join.addEventListener('click', ()=>{
playNoise()
})
socket.onmessage = (event) => {
let message;
try {
message = JSON.parse(event.data);
} catch (e) {}
console.log("received a message! ", message)
if (message?.type == 'pulse'){
emit(message.x, message.y)
}
};

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public/draw.js
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// Great resource from https://stackoverflow.com/a/40700068
// Thank you ConnorFan
var strokeWidth = 8;
var bufferSize;
var svgElement = document.getElementById("svgElement");
var rect = svgElement.getBoundingClientRect();
var path = null;
var strPath;
var buffer = []; // Contains the last positions of the mouse cursor
const startDrawing = (e) => {
e.preventDefault();
// console.log("start");
bufferSize = 2;
path = document.createElementNS("http://www.w3.org/2000/svg", "path");
path.setAttribute("fill", "none");
path.setAttribute("stroke", "currentColor");
path.setAttribute("stroke-width", strokeWidth);
buffer = [];
var pt = getMousePosition(e);
appendToBuffer(pt);
strPath = "M" + pt.x + " " + pt.y;
path.setAttribute("d", strPath);
svgElement.appendChild(path);
};
const draw = (e) => {
e.preventDefault();
if (path) {
// console.log("draw");
appendToBuffer(getMousePosition(e));
updateSvgPath();
}
};
const stopDrawing = () => {
if (path) {
// console.log("stop");
path = null;
}
};
var getMousePosition = function (e) {
return {
x: (e.pageX || e?.changedTouches[0]?.pageX) - rect.left,
y: (e.pageY || e?.changedTouches[0]?.pageY) - rect.top,
};
};
var appendToBuffer = function (pt) {
buffer.push(pt);
while (buffer.length > bufferSize) {
buffer.shift();
}
};
// Calculate the average point, starting at offset in the buffer
var getAveragePoint = function (offset) {
var len = buffer.length;
if (len % 2 === 1 || len >= bufferSize) {
var totalX = 0;
var totalY = 0;
var pt, i;
var count = 0;
for (i = offset; i < len; i++) {
count++;
pt = buffer[i];
totalX += pt.x;
totalY += pt.y;
}
return {
x: totalX / count,
y: totalY / count,
};
}
return null;
};
var updateSvgPath = function () {
var pt = getAveragePoint(0);
if (pt) {
// Get the smoothed part of the path that will not change
strPath += " L" + pt.x + " " + pt.y;
// Get the last part of the path (close to the current mouse position)
// This part will change if the mouse moves again
var tmpPath = "";
for (var offset = 2; offset < buffer.length; offset += 2) {
pt = getAveragePoint(offset);
tmpPath += " L" + pt.x + " " + pt.y;
}
// Set the complete current path coordinates
path.setAttribute("d", strPath + tmpPath);
}
};
svgElement.addEventListener("mousedown", (e) => startDrawing(e));
svgElement.addEventListener("touchstart", (e) => startDrawing(e), { passive: false });
svgElement.addEventListener("mousemove", (e) => draw(e));
svgElement.addEventListener("touchmove", (e) => draw(e), { passive: false });
svgElement.addEventListener("mouseup", () => stopDrawing());
svgElement.addEventListener("mouseleave", () => stopDrawing());
svgElement.addEventListener("touchend", () => stopDrawing());

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public/style.css
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.container {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100vh;
}
.container.destination {
pointer-events: none;
}
.gradient {
position: absolute;
top: 0;
left: 0;
width: 50px;
height: 50px;
display: inline-block;
pointer-events: none;
}

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public/teletap.js
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const tap = document.querySelector('.container')
const address = document.querySelector('#address').innerHTML
const socket = new ReconnectingWebSocket(location.origin.replace(/^http/, "ws") + address);
const audioContext = new AudioContext();
let noiseDuration = 0.05
const playNoise = (bandHz = 1000, time = 0) => {
const bufferSize = audioContext.sampleRate * noiseDuration
// Create an empty buffer
const noiseBuffer = new AudioBuffer({
length: bufferSize,
sampleRate: audioContext.sampleRate,
})
// Fill the buffer with noise
const data = noiseBuffer.getChannelData(0);
for (let i = 0; i < bufferSize; i++) {
data[i] = Math.random() * 2 - 1;
}
// Create a buffer source from data
const noise = new AudioBufferSourceNode(audioContext, {
buffer: noiseBuffer,
})
// Filter the output
const bandpass = new BiquadFilterNode(audioContext, {
type: "bandpass",
frequency: bandHz
})
noise.connect(bandpass).connect(audioContext.destination);
noise.start(time);
}
const playPulse = (freq=440, lfoFreq=30, duration=1, time=0) => {
const osc = new OscillatorNode(audioContext, {
type: "square",
frequency: freq
})
const amp = new GainNode(audioContext, {
value: 0
})
const lfo = new OscillatorNode(audioContext, {
type: "sine",
frequency: lfoFreq
})
lfo.connect(amp.gain)
osc.connect(amp).connect(audioContext.destination)
lfo.start()
osc.start(time)
// osc.stop(time + duration)
}
const spawnGradient = (x, y) => {
const gradient = document.createElement('div')
gradient.classList.add('gradient')
gradient.style.translate = `${x}px ${y}px`
gradient.style.scale = 0
let red = x / tap.clientWidth * 255
let green = y / tap.clientHeight * 255
let blue = 0
gradient.style.background = `radial-gradient(circle, rgba(${red},${green},${blue},1) 0%, rgba(${red},${green},${blue},0) 25%)`
tap.appendChild(gradient)
grow(gradient)
}
const grow = (el) => {
let scale = Number(el.style.scale) || 0
el.style.scale = scale + 0.1
requestAnimationFrame(()=> grow(el))
}
tap.addEventListener("click", (e) => {
playPulse(e.clientX, e.clientY * 0.01)
spawnGradient(e.clientX, e.clientY)
console.log('sending pulse')
socket.send(JSON.stringify({type: 'pulse', x: e.clientX, y: e.clientY }))
})

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public/wss.js
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// MIT License:
//
// Copyright (c) 2010-2012, Joe Walnes
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
/**
* This behaves like a WebSocket in every way, except if it fails to connect,
* or it gets disconnected, it will repeatedly poll until it successfully connects
* again.
*
* It is API compatible, so when you have:
* ws = new WebSocket('ws://....');
* you can replace with:
* ws = new ReconnectingWebSocket('ws://....');
*
* The event stream will typically look like:
* onconnecting
* onopen
* onmessage
* onmessage
* onclose // lost connection
* onconnecting
* onopen // sometime later...
* onmessage
* onmessage
* etc...
*
* It is API compatible with the standard WebSocket API, apart from the following members:
*
* - `bufferedAmount`
* - `extensions`
* - `binaryType`
*
* Latest version: https://github.com/joewalnes/reconnecting-websocket/
* - Joe Walnes
*
* Syntax
* ======
* var socket = new ReconnectingWebSocket(url, protocols, options);
*
* Parameters
* ==========
* url - The url you are connecting to.
* protocols - Optional string or array of protocols.
* options - See below
*
* Options
* =======
* Options can either be passed upon instantiation or set after instantiation:
*
* var socket = new ReconnectingWebSocket(url, null, { debug: true, reconnectInterval: 4000 });
*
* or
*
* var socket = new ReconnectingWebSocket(url);
* socket.debug = true;
* socket.reconnectInterval = 4000;
*
* debug
* - Whether this instance should log debug messages. Accepts true or false. Default: false.
*
* automaticOpen
* - Whether or not the websocket should attempt to connect immediately upon instantiation. The socket can be manually opened or closed at any time using ws.open() and ws.close().
*
* reconnectInterval
* - The number of milliseconds to delay before attempting to reconnect. Accepts integer. Default: 1000.
*
* maxReconnectInterval
* - The maximum number of milliseconds to delay a reconnection attempt. Accepts integer. Default: 30000.
*
* reconnectDecay
* - The rate of increase of the reconnect delay. Allows reconnect attempts to back off when problems persist. Accepts integer or float. Default: 1.5.
*
* timeoutInterval
* - The maximum time in milliseconds to wait for a connection to succeed before closing and retrying. Accepts integer. Default: 2000.
*
*/
(function (global, factory) {
if (typeof define === "function" && define.amd) {
define([], factory);
} else if (typeof module !== "undefined" && module.exports) {
module.exports = factory();
} else {
global.ReconnectingWebSocket = factory();
}
})(this, function () {
if (!("WebSocket" in window)) {
return;
}
function ReconnectingWebSocket(url, protocols, options) {
// Default settings
var settings = {
/** Whether this instance should log debug messages. */
debug: false,
/** Whether or not the websocket should attempt to connect immediately upon instantiation. */
automaticOpen: true,
/** The number of milliseconds to delay before attempting to reconnect. */
reconnectInterval: 1000,
/** The maximum number of milliseconds to delay a reconnection attempt. */
maxReconnectInterval: 30000,
/** The rate of increase of the reconnect delay. Allows reconnect attempts to back off when problems persist. */
reconnectDecay: 1.5,
/** The maximum time in milliseconds to wait for a connection to succeed before closing and retrying. */
timeoutInterval: 2000,
/** The maximum number of reconnection attempts to make. Unlimited if null. */
maxReconnectAttempts: null,
/** The binary type, possible values 'blob' or 'arraybuffer', default 'blob'. */
binaryType: "blob",
};
if (!options) {
options = {};
}
// Overwrite and define settings with options if they exist.
for (var key in settings) {
if (typeof options[key] !== "undefined") {
this[key] = options[key];
} else {
this[key] = settings[key];
}
}
// These should be treated as read-only properties
/** The URL as resolved by the constructor. This is always an absolute URL. Read only. */
this.url = url;
/** The number of attempted reconnects since starting, or the last successful connection. Read only. */
this.reconnectAttempts = 0;
/**
* The current state of the connection.
* Can be one of: WebSocket.CONNECTING, WebSocket.OPEN, WebSocket.CLOSING, WebSocket.CLOSED
* Read only.
*/
this.readyState = WebSocket.CONNECTING;
/**
* A string indicating the name of the sub-protocol the server selected; this will be one of
* the strings specified in the protocols parameter when creating the WebSocket object.
* Read only.
*/
this.protocol = null;
// Private state variables
var self = this;
var ws;
var forcedClose = false;
var timedOut = false;
var eventTarget = document.createElement("div");
// Wire up "on*" properties as event handlers
eventTarget.addEventListener("open", function (event) {
self.onopen(event);
});
eventTarget.addEventListener("close", function (event) {
self.onclose(event);
});
eventTarget.addEventListener("connecting", function (event) {
self.onconnecting(event);
});
eventTarget.addEventListener("message", function (event) {
self.onmessage(event);
});
eventTarget.addEventListener("error", function (event) {
self.onerror(event);
});
// Expose the API required by EventTarget
this.addEventListener = eventTarget.addEventListener.bind(eventTarget);
this.removeEventListener = eventTarget.removeEventListener.bind(eventTarget);
this.dispatchEvent = eventTarget.dispatchEvent.bind(eventTarget);
/**
* This function generates an event that is compatible with standard
* compliant browsers and IE9 - IE11
*
* This will prevent the error:
* Object doesn't support this action
*
* http://stackoverflow.com/questions/19345392/why-arent-my-parameters-getting-passed-through-to-a-dispatched-event/19345563#19345563
* @param s String The name that the event should use
* @param args Object an optional object that the event will use
*/
function generateEvent(s, args) {
var evt = document.createEvent("CustomEvent");
evt.initCustomEvent(s, false, false, args);
return evt;
}
this.open = function (reconnectAttempt) {
ws = new WebSocket(self.url, protocols || []);
ws.binaryType = this.binaryType;
if (reconnectAttempt) {
if (
this.maxReconnectAttempts &&
this.reconnectAttempts > this.maxReconnectAttempts
) {
return;
}
} else {
eventTarget.dispatchEvent(generateEvent("connecting"));
this.reconnectAttempts = 0;
}
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "attempt-connect", self.url);
}
var localWs = ws;
var timeout = setTimeout(function () {
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "connection-timeout", self.url);
}
timedOut = true;
localWs.close();
timedOut = false;
}, self.timeoutInterval);
ws.onopen = function (event) {
clearTimeout(timeout);
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "onopen", self.url);
}
self.protocol = ws.protocol;
self.readyState = WebSocket.OPEN;
self.reconnectAttempts = 0;
var e = generateEvent("open");
e.isReconnect = reconnectAttempt;
reconnectAttempt = false;
eventTarget.dispatchEvent(e);
};
ws.onclose = function (event) {
clearTimeout(timeout);
ws = null;
if (forcedClose) {
self.readyState = WebSocket.CLOSED;
eventTarget.dispatchEvent(generateEvent("close"));
} else {
self.readyState = WebSocket.CONNECTING;
var e = generateEvent("connecting");
e.code = event.code;
e.reason = event.reason;
e.wasClean = event.wasClean;
eventTarget.dispatchEvent(e);
if (!reconnectAttempt && !timedOut) {
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "onclose", self.url);
}
eventTarget.dispatchEvent(generateEvent("close"));
}
var timeout =
self.reconnectInterval *
Math.pow(self.reconnectDecay, self.reconnectAttempts);
setTimeout(
function () {
self.reconnectAttempts++;
self.open(true);
},
timeout > self.maxReconnectInterval ? self.maxReconnectInterval : timeout
);
}
};
ws.onmessage = function (event) {
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "onmessage", self.url, event.data);
}
var e = generateEvent("message");
e.data = event.data;
eventTarget.dispatchEvent(e);
};
ws.onerror = function (event) {
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "onerror", self.url, event);
}
eventTarget.dispatchEvent(generateEvent("error"));
};
};
// Whether or not to create a websocket upon instantiation
if (this.automaticOpen == true) {
this.open(false);
}
/**
* Transmits data to the server over the WebSocket connection.
*
* @param data a text string, ArrayBuffer or Blob to send to the server.
*/
this.send = function (data) {
if (ws) {
if (self.debug || ReconnectingWebSocket.debugAll) {
console.debug("ReconnectingWebSocket", "send", self.url, data);
}
return ws.send(data);
} else {
throw "INVALID_STATE_ERR : Pausing to reconnect websocket";
}
};
/**
* Closes the WebSocket connection or connection attempt, if any.
* If the connection is already CLOSED, this method does nothing.
*/
this.close = function (code, reason) {
// Default CLOSE_NORMAL code
if (typeof code == "undefined") {
code = 1000;
}
forcedClose = true;
if (ws) {
ws.close(code, reason);
}
};
/**
* Additional public API method to refresh the connection if still open (close, re-open).
* For example, if the app suspects bad data / missed heart beats, it can try to refresh.
*/
this.refresh = function () {
if (ws) {
ws.close();
}
};
}
/**
* An event listener to be called when the WebSocket connection's readyState changes to OPEN;
* this indicates that the connection is ready to send and receive data.
*/
ReconnectingWebSocket.prototype.onopen = function (event) {};
/** An event listener to be called when the WebSocket connection's readyState changes to CLOSED. */
ReconnectingWebSocket.prototype.onclose = function (event) {};
/** An event listener to be called when a connection begins being attempted. */
ReconnectingWebSocket.prototype.onconnecting = function (event) {};
/** An event listener to be called when a message is received from the server. */
ReconnectingWebSocket.prototype.onmessage = function (event) {};
/** An event listener to be called when an error occurs. */
ReconnectingWebSocket.prototype.onerror = function (event) {};
/**
* Whether all instances of ReconnectingWebSocket should log debug messages.
* Setting this to true is the equivalent of setting all instances of ReconnectingWebSocket.debug to true.
*/
ReconnectingWebSocket.debugAll = false;
ReconnectingWebSocket.CONNECTING = WebSocket.CONNECTING;
ReconnectingWebSocket.OPEN = WebSocket.OPEN;
ReconnectingWebSocket.CLOSING = WebSocket.CLOSING;
ReconnectingWebSocket.CLOSED = WebSocket.CLOSED;
return ReconnectingWebSocket;
});

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server.js
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// Import dependencies
const { WebSocket, WebSocketServer } = require("ws");
const express = require("express");
const dotenv = require("dotenv");
dotenv.config();
// Setup Environmental Variables
const PORT = process.env.PORT || 3000;
const PREFIX = process.env.PREFIX || "";
const PUBLIC = process.env.PUBLIC || "";
// Setup Express Router
// Create the routes of the application
// Here are two pages and a wildcard:
// at / there is the index.html page, where to draw
// at /destination there is the destination.html page, where to receive the drawings
// the wildcard /* serves the static files from the public folder
const router = express.Router();
const routes = (app) => {
app.get("/", (req, res) => {
res.render("index", {
address: PREFIX,
});
});
app.get("/destination", (req, res) => {
res.render("destination", {
address: PREFIX,
});
});
app.get("/*", (req, res) => {
res.sendFile(req.url, { root: "public" });
});
return app;
};
// Setup the Express server
const server = express()
.set("view engine", "html")
.engine("html", require("hbs").__express)
.use(PREFIX, routes(router, {}))
.use(express.static("public"))
.listen(PORT, () => console.log(`Listening on ${PORT}`));
// Setup the Websocket server on top of the Express one
const wss = new WebSocketServer({ server, clientTracking: true });
// Global variables to manage the connected Destination and User clients
let DESTINATIONS = new Set();
let USERS = new Set();
var theme = "";
// The message processor defines which function is associated to every websocket message type.
// It map a type to a function, passing some optional parameters such as the message itself and the websocket client that sent it.
// for example an incoming message like {type: hello} will trigger the registerDest(ws, msg) function.
// In this way to add message types and functionalities gets easier, and avoid long chain of if-else statements.
const messageProcessor = {
default: (ws, msg) => unknownMsg(msg),
hello: (ws, msg) => registerDest(ws, msg),
pulse: (ws, msg) => toDest(msg)
};
// Message processor functions
// Default function, to cactch unkown message types
const unknownMsg = (msg) => {
console.log("Unknown message type...");
console.log(msg);
};
// Add the ws client in the destinations set
// Removing it when it disconnets
const registerDest = (ws, msg) => {
console.log("Destination client connected");
DESTINATIONS.add(ws);
ws.on("close", () => {
DESTINATIONS.delete(ws);
});
};
// Send a message to all the connected Destinations
const toDest = (msg) => {
let message = JSON.stringify(msg);
DESTINATIONS.forEach((DESTINATION) => {
if (DESTINATION?.readyState === WebSocket.OPEN) {
DESTINATION.send(message);
}
});
};
// Send a message to all the connected Users
const broadcast = (msg) => {
let message = JSON.stringify(msg);
console.log('broadcasting: ', message)
for (const user of USERS.values()) {
if (user?.readyState === WebSocket.OPEN && !DESTINATIONS.has(user)) {
user.send(message);
}
}
};
// Websocket events listener
wss.on("connection", (ws) => {
USERS.add(ws);
ws.send(JSON.stringify({ type: "theme", theme: theme }));
ws.on("message", (data) => {
// Parse the incoming data safely
let message;
try {
message = JSON.parse(data);
} catch (e) {}
// Call the message processor, eventually falling back to use the default function if the type is not defined.
if (message) {
(messageProcessor[message?.type] || messageProcessor.default)(ws, message);
}
});
ws.on("close", () => {
USERS.delete(ws);
});
});

18
views/destination.html
Unescape Escape View File

@ -0,0 +1,18 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Draw draw draw</title>
<script src="wss.js"></script>
<script src="audioDestination.js" defer></script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="container destination"></div>
<span id="address">{{address}}</span>
<button id="join">Join audio</button>
</body>
</html>

19
views/index.html
Unescape Escape View File

@ -0,0 +1,19 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Draw draw draw</title>
<script src="wss.js"></script>
<script src="teletap.js" defer></script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<span id="address">{{address}}</span>
<div class="container"></div>
</body>
</html>

93
views/wander.html
Unescape Escape View File

@ -0,0 +1,93 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Draw draw draw</title>
<script src="wss.js"></script>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<h1>Display</h1>
<div id="svg-container" class="destination">
<svg
class="hidden"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
version="1.1"
id="svgElement"
x="0px"
y="0px"
width="200px"
height="200px"
viewBox="0 0 500 500"
enable-background="new 0 0 100 100"
preserveAspectRatio="none"
xml:space="preserve"
></svg>
</div>
<script>
const svgModel = document.querySelector("#svgElement");
const container = document.querySelector("#svg-container");
const socket = new ReconnectingWebSocket(
location.origin.replace(/^http/, "ws") + "{{address}}"
);
socket.onopen = (event) => {
socket.send(JSON.stringify({ type: "hello" }));
console.log("Connected as destination!");
};
socket.onmessage = (event) => {
let message;
try {
message = JSON.parse(event.data);
} catch (e) {}
if (message?.type == "drawings") {
let svg = svgModel.cloneNode();
svg.classList.remove("hidden");
let path = document.createElementNS("http://www.w3.org/2000/svg", "path");
path.setAttribute("d", message.paths);
path.setAttribute("fill", "none");
path.setAttribute("stroke", "currentColor");
path.setAttribute("stroke-width", 8);
svg.appendChild(path);
svg.style.translate = '50% 50%'
svg.style.transition = 'translate 0.5s'
walk(svg)
container.appendChild(svg);
}
};
const randomWalk = (prev, scale = 1) => {
return {
x: prev?.x + (Math.random() - 0.5) * scale,
y: prev?.y + (Math.random() - 0.5) * scale
}
}
const walk = (el) => {
let translate = el.style.translate
let coords = translate.split(' ')
let newCoords = randomWalk(
{
x: Number(coords[0].replace('%', '')),
y: Number(coords[1].replace('%', ''))
},
10
)
el.style.translate = `${newCoords.x}% ${newCoords.y}%`
requestAnimationFrame(()=> walk(el))
}
</script>
</body>
</html>
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