lol cursor is multiplayer now
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7 changed files with 362 additions and 107 deletions
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@ -2,8 +2,9 @@ import config from './config.js';
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const CURSOR_TICK_RATE = 1000/30;
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const CURSOR_LERP_RATE = 1/100;
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const CURSOR_FUNCHAR_RATE = 20;
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const CURSOR_CHAR_MAX_LIFE = 5000;
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const CURSOR_MAX_CHARS = 50;
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const CURSOR_MAX_CHARS = 64;
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/** @type HTMLElement */
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let cursorContainer;
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@ -11,61 +12,57 @@ let cursorContainer;
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let myCursor;
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/** @type Map<number, Cursor> */
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let cursors = new Map();
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/** @type Array<FunChar> */
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let chars = new Array();
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/** @type WebSocket */
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let ws;
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let running = false;
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let lastCursorUpdateTime = 0;
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let lastCharUpdateTime = 0;
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let lastUpdate = 0;
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class Cursor {
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/** @type number */ id;
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// real coordinates (canonical)
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/** @type number */ x;
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/** @type number */ y;
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// update coordinates (interpolated)
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/** @type number */ rx;
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/** @type number */ ry;
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/** @type HTMLElement */
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#element;
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/** @type HTMLElement */
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#char;
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#charElement;
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#funCharCooldown = CURSOR_FUNCHAR_RATE;
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/**
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* @param {number} id
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* @param {string} id
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* @param {number} x
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* @param {number} y
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*/
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constructor(id, x, y) {
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this.id = id;
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// real coordinates (canonical)
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this.x = x;
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this.y = y;
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// render coordinates (interpolated)
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this.rx = x;
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this.ry = y;
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this.msg = '';
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this.funChars = new Array();
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const element = document.createElement('i');
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element.classList.add('cursor');
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element.id = 'cursor' + id;
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const colour = randomColour();
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element.style.borderColor = colour;
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element.style.color = colour;
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element.innerText = '0x' + navigator.userAgent.hashCode();
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const char = document.createElement('p');
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char.className = 'char';
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element.appendChild(char);
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cursorContainer.appendChild(element);
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this.#element = element;
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this.#char = char;
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cursorContainer.appendChild(this.#element);
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const char = document.createElement('i');
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char.className = 'char';
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cursorContainer.appendChild(char);
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this.#charElement = char;
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this.setID(id);
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}
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destroy() {
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this.#element.remove();
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this.#char.remove();
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this.#charElement.remove();
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this.funChars.forEach(char => {
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char.destroy();
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});
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}
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/**
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@ -85,14 +82,52 @@ class Cursor {
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this.ry += (this.y - this.ry) * CURSOR_LERP_RATE * deltaTime;
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this.#element.style.left = this.rx + 'px';
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this.#element.style.top = this.ry + 'px';
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this.#charElement.style.left = this.rx + 'px';
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this.#charElement.style.top = (this.ry - 24) + 'px';
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if (this.#funCharCooldown > 0)
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this.#funCharCooldown -= deltaTime;
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if (this.msg.length > 0) {
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if (config.cursorFunMode === true) {
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if (this.#funCharCooldown <= 0) {
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this.#funCharCooldown = CURSOR_FUNCHAR_RATE;
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if (this.funChars.length >= CURSOR_MAX_CHARS) {
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const char = this.funChars.shift();
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char.destroy();
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}
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const yOffset = -20;
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const accelMultiplier = 0.002;
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this.funChars.push(new FunChar(
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this.x + window.scrollX, this.y + window.scrollY + yOffset,
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(this.x - this.rx) * accelMultiplier, (this.y - this.ry) * accelMultiplier,
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this.msg));
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}
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} else {
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this.#charElement.innerText = this.msg;
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}
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} else {
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this.#charElement.innerText = '';
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}
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this.funChars.forEach(char => {
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if (char.life > CURSOR_CHAR_MAX_LIFE ||
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char.y > document.body.clientHeight ||
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char.x < 0 ||
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char.x > document.body.clientWidth
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) {
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this.funChars = this.funChars.filter(c => c !== this);
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char.destroy();
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return;
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}
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char.update(deltaTime);
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});
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}
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/**
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* @param {string} text
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*/
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print(text) {
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if (text.length > 1) return;
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this.#char.innerText = text;
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setID(id) {
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this.id = id;
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this.#element.id = 'cursor' + id;
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this.#element.innerText = '0x' + id.toString(16).slice(0, 8).padStart(8, '0');
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}
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/**
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@ -107,12 +142,6 @@ class Cursor {
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}
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class FunChar {
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/** @type number */ x; y;
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/** @type number */ xa; ya;
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/** @type number */ r; ra;
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/** @type HTMLElement */ element;
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/** @type number */ life;
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/**
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* @param {number} x
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* @param {number} y
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@ -144,14 +173,6 @@ class FunChar {
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*/
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update(deltaTime) {
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this.life += deltaTime;
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if (this.life > CURSOR_CHAR_MAX_LIFE ||
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this.y > document.body.clientHeight ||
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this.x < 0 ||
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this.x > document.body.clientWidth
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) {
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this.destroy();
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return;
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}
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this.x += this.xa * deltaTime;
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this.y += this.ya * deltaTime;
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@ -164,22 +185,10 @@ class FunChar {
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}
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destroy() {
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chars = chars.filter(char => char !== this);
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this.element.remove();
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}
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}
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String.prototype.hashCode = function() {
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var hash = 0;
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if (this.length === 0) return hash;
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for (let i = 0; i < this.length; i++) {
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const chr = this.charCodeAt(i);
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hash = ((hash << 5) - hash) + chr;
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hash |= 0; // convert to 32-bit integer
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}
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return Math.round(Math.abs(hash)).toString(16).slice(0, 8).padStart(8, '0');
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};
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/**
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* @returns string
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*/
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@ -198,6 +207,8 @@ function randomColour() {
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*/
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function handleMouseMove(event) {
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if (!myCursor) return;
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if (ws && ws.readyState == WebSocket.OPEN)
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ws.send(`pos:${event.x}:${event.y}`);
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myCursor.move(event.x, event.y);
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}
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@ -211,26 +222,19 @@ function handleMouseUp() {
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/**
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* @param {KeyboardEvent} event
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*/
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function handleKeyDown(event) {
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function handleKeyPress(event) {
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if (event.key.length > 1) return;
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if (event.metaKey || event.ctrlKey) return;
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if (config.cursorFunMode === true) {
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const yOffset = -20;
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const accelMultiplier = 0.002;
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if (chars.length < CURSOR_MAX_CHARS)
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chars.push(new FunChar(
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myCursor.x + window.scrollX, myCursor.y + window.scrollY + yOffset,
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(myCursor.x - myCursor.rx) * accelMultiplier, (myCursor.y - myCursor.ry) * accelMultiplier,
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event.key));
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} else {
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myCursor.print(event.key);
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}
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if (myCursor.msg === event.key) return;
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if (ws && ws.readyState == WebSocket.OPEN)
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ws.send(`char:${event.key}`);
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myCursor.msg = event.key;
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}
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function handleKeyUp() {
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if (!config.cursorFunMode) {
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myCursor.print('');
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}
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if (ws && ws.readyState == WebSocket.OPEN)
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ws.send(`nochar`);
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myCursor.msg = '';
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}
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/**
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@ -239,32 +243,16 @@ function handleKeyUp() {
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function updateCursors(time) {
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if (!running) return;
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const deltaTime = time - lastCursorUpdateTime;
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const deltaTime = time - lastUpdate;
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cursors.forEach(cursor => {
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cursor.update(deltaTime);
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});
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lastCursorUpdateTime = time;
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lastUpdate = time;
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requestAnimationFrame(updateCursors);
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}
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/**
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* @param {number} time
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*/
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function updateChars(time) {
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if (!running) return;
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const deltaTime = time - lastCharUpdateTime;
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chars.forEach(char => {
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char.update(deltaTime);
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});
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lastCharUpdateTime = time;
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requestAnimationFrame(updateChars);
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}
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function cursorSetup() {
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if (running) throw new Error('Only one instance of Cursor can run at a time.');
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running = true;
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@ -273,19 +261,82 @@ function cursorSetup() {
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cursorContainer.id = 'cursors';
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document.body.appendChild(cursorContainer);
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myCursor = new Cursor(0, window.innerWidth / 2, window.innerHeight / 2);
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myCursor = new Cursor("You!", window.innerWidth / 2, window.innerHeight / 2);
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cursors.set(0, myCursor);
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document.addEventListener('mousemove', handleMouseMove);
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document.addEventListener('mousedown', handleMouseDown);
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document.addEventListener('mouseup', handleMouseUp);
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document.addEventListener('keydown', handleKeyDown);
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document.addEventListener('keypress', handleKeyPress);
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document.addEventListener('keyup', handleKeyUp);
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requestAnimationFrame(updateCursors);
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requestAnimationFrame(updateChars);
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console.debug(`Cursor tracking @ ${window.location.pathname}`);
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ws = new WebSocket("/cursor-ws");
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ws.addEventListener("open", () => {
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console.log("Cursor connected to server successfully.");
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ws.send(`loc:${window.location.pathname}`);
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});
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ws.addEventListener("error", error => {
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console.error("Cursor WebSocket error:", error);
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});
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ws.addEventListener("close", () => {
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console.log("Cursor connection closed.");
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});
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ws.addEventListener("message", event => {
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const args = String(event.data).split(":");
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if (args.length == 0) return;
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let id = 0;
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/** @type Cursor */
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let cursor;
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if (args.length > 1) {
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id = Number(args[1]);
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cursor = cursors.get(id);
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}
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switch (args[0]) {
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case 'id': {
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myCursor.setID(Number(args[1]));
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break;
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}
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case 'join': {
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if (id === myCursor.id) break;
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cursors.set(id, new Cursor(id, 0, 0));
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break;
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}
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case 'leave': {
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if (!cursor || cursor === myCursor) break;
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cursors.get(id).destroy();
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cursors.delete(id);
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break;
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}
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case 'char': {
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if (!cursor || cursor === myCursor) break;
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cursor.msg = args[2];
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break;
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}
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case 'nochar': {
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if (!cursor || cursor === myCursor) break;
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cursor.msg = '';
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break;
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}
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case 'pos': {
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if (!cursor || cursor === myCursor) break;
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cursor.move(Number(args[2]), Number(args[3]));
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break;
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}
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default: {
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console.warn("Cursor: Unknown command received from server:", args[0]);
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break;
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}
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}
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});
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console.log(`Cursor tracking @ ${window.location.pathname}`);
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}
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function cursorDestroy() {
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@ -294,13 +345,9 @@ function cursorDestroy() {
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document.removeEventListener('mousemove', handleMouseMove);
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document.removeEventListener('mousedown', handleMouseDown);
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document.removeEventListener('mouseup', handleMouseUp);
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document.removeEventListener('keydown', handleKeyDown);
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document.removeEventListener('keypress', handleKeyPress);
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document.removeEventListener('keyup', handleKeyUp);
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chars.forEach(char => {
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char.destroy();
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});
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chars = new Array();
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cursors.forEach(cursor => {
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cursor.destroy();
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});
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@ -309,7 +356,7 @@ function cursorDestroy() {
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cursorContainer.remove();
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console.debug(`Cursor no longer tracking.`);
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console.log(`Cursor no longer tracking.`);
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running = false;
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}
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@ -20,15 +20,16 @@
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border-color: var(--on-background) !important;
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}
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#cursors i.cursor .char {
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#cursors i.char {
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position: absolute;
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transform: translateY(-44px);
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margin: 0;
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font-style: normal;
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font-size: 20px;
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font-weight: bold;
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color: var(--on-background);
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}
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#cursors .funchar {
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#cursors i.funchar {
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position: absolute;
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margin: 0;
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