434 lines
12 KiB
XML
434 lines
12 KiB
XML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<svg viewBox="-200 -150 400 300" version="1.1" xmlns="http://www.w3.org/2000/svg">
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<style>
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#frames {
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position: absolute;
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right: 0px;
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}
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p {
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border: 1px solid black;
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box-size: border-box;
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}
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rect#bg {
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fill: gray;
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}
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.tank rect {
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fill: green;
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transform: translate(-7.5px, -5px);
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}
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.tank circle {
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fill: white;
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}
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#crosshair {
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opacity: 0.5;
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}
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circle.bullet {
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fill: yellow;
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}
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</style>
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<rect id="bg" x="-200" y="-150" width="400" height="300"/>
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<g>
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<g class="hitbox">
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<g class="tank">
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<circle cx="0" cy="0" r="5"/>
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<line x1="0" y1="0" x2="0" y2="8" stroke="black"/>
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</g>
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</g>
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<rect id="rect1" x="30" y="30" width="20" height="20"/>
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<g id="bullets"></g>
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</g>
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<foreignObject x="-200" y="-150" width="100%" height="100%">
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<div id="frames" xmlns="http://www.w3.org/1999/xhtml">
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<span id="fps" xmlns="http://www.w3.org/1999/xhtml">0</span> fps
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</div>
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<button id="turn-left" xmlns="http://www.w3.org/1999/xhtml">🡐</button>
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<button id="move-backward" xmlns="http://www.w3.org/1999/xhtml">🡑</button>
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<button id="move-forward" xmlns="http://www.w3.org/1999/xhtml">🡓</button>
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<button id="turn-right" xmlns="http://www.w3.org/1999/xhtml">🡒</button>
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<button id="rotate-ccw" xmlns="http://www.w3.org/1999/xhtml">⟲</button>
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<button id="rotate-cw" xmlns="http://www.w3.org/1999/xhtml">⟳</button>
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<button id="fire" xmlns="http://www.w3.org/1999/xhtml">Fire</button>
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<pre id="debug" xmlns="http://www.w3.org/1999/xhtml"></pre>
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</foreignObject>
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<script type="text/javascript">//<![CDATA[
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const namespaceURIsvg = 'http://www.w3.org/2000/svg';
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const degsRegex = /(-?\d*\.{0,1}\d+)deg/g;
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const regex = /(-?\d*\.{0,1}\d+)px/g;
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const def = ["0px", "0"];
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let bullets = [];
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let position = [0, 0]; // meters
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let velocity = [0, 0]; // meters per second
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let acceleration = [0, 0]; // meters per second per second
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let previous, zero, frameCount = 0;
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// let friction = 7.5;
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let friction = 0;
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let rotate = 0;
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let rotationSpeed = 0.25;
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const maxSpeed = 100;
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const rules = document.styleSheets[0].cssRules;
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const fps = document.querySelector("#fps");
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const info = document.querySelector("#debug");
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const tank = document.querySelector(".tank");
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const gun = tank.querySelector('line');
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const hitbox = document.querySelector(".hitbox");
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const bulletsContainer = document.querySelector("#bullets");
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const r1 = document.querySelector("#rect1");
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const leftTurnButton = document.querySelector("#turn-left");
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const rightTurnButton = document.querySelector("#turn-right");
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const reverseMoveButton = document.querySelector("#move-backward");
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const forwardMoveButton = document.querySelector("#move-forward");
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const rotateCWButton = document.querySelector("#rotate-cw");
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const rotateCCWButton = document.querySelector("#rotate-ccw");
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const fireButton = document.querySelector("#fire");
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gun.style.transform = "rotate(0deg)";
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function wrapPos(positionX, positionY) {
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let x, y;
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if (positionY > 150) y = positionY - 300;
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else if (positionY < -150) y = positionY + 300;
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else y = positionY;
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if (positionX > 200) x = positionX - 400;
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else if (positionX < -200) x = positionX + 400;
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else x = positionX;
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return [x, y];
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}
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function fireBullet(x, y, velocity) {
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const degrees = getRotate(gun);
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const radians = degrees * Math.PI / 180; // toFixed(15)?
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const speed = 200; // meters per second
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const vx = -Math.sin(radians);
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const vy = Math.cos(radians);
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const bulletTimeout = 5000; // miliseconds
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const cannonLength = 8;
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const el = document.createElementNS(namespaceURIsvg, 'circle');
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el.classList.add('bullet');
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el.setAttribute('r', 1);
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el.setAttribute('cx', 0);
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el.setAttribute('cy', 0);
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const bullet = {
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x: x + vx * cannonLength,
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y: y + vy * cannonLength,
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vx: vx * speed + velocity[0],
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vy: vy * speed + velocity[1],
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time: bulletTimeout,
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node: bulletsContainer.appendChild(el)
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}
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bullets.push(bullet);
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}
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function getTranslate(el) {
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let x, y;
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if (el.style.transform.length === 0) {
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x = 0;
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y = 0;
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} else {
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[[, x], [, y] = def] = [...el.style.transform.matchAll(regex)];
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}
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return [+x, +y];
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}
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function getRotate(el) {
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let [[, degrees]] = [...el.style.transform.matchAll(degsRegex)];
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return +degrees;
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}
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requestAnimationFrame(firstFrame);
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function firstFrame(timestamp) {
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zero = timestamp;
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previous = timestamp;
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animate(timestamp);
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}
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function animate(timestamp) {
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const delta = timestamp - zero;
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const elapsed = timestamp - previous;
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previous = timestamp;
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if (delta >= 1000) {
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fps.innerText = frameCount;
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info.innerText = `velocity ${velocity}\n`
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+ 'bullets\nx\ty\tvx\tvy\n'
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+ bullets.map((b, index) => {
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return `${b.x.toFixed(2)}\t${b.y.toFixed(2)}\t${b.vx.toFixed(2)}\t${b.vy.toFixed(2)}`;
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}).join("\n");
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zero = timestamp;
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frameCount = 0;
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} else {
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frameCount++;
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}
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let [[, degrees]] = [...gun.style.transform.matchAll(degsRegex)];
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if (rotate > 0) gun.style.transform = `rotate(${(+degrees + rotationSpeed * elapsed) % 360}deg)`;
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else if (rotate < 0) gun.style.transform = `rotate(${(+degrees - rotationSpeed * elapsed) % 360}deg)`;
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let [velocityX, velocityY] = velocity;
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let [accelerationX, accelerationY] = acceleration;
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if (velocityX > 0) accelerationX += -friction;
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else if (velocityX < 0) accelerationX += friction;
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if (velocityY > 0) accelerationY += -friction;
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else if (velocityY < 0) accelerationY += friction;
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velocityX = velocityX > 0 && velocityX + accelerationX < 0 ? 0 : velocityX + accelerationX;
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velocityY = velocityY > 0 && velocityY + accelerationY < 0 ? 0 : velocityY + accelerationY;
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velocity = [velocityX, velocityY];
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if (velocity[0] > maxSpeed) velocity[0] = maxSpeed;
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else if (velocity[0] < -maxSpeed) velocity[0] = -maxSpeed
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if (velocity[1] > maxSpeed) velocity[1] = maxSpeed;
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else if (velocity[1] < -maxSpeed) velocity[1] = -maxSpeed
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const changeX = 0.001 * elapsed * velocityX;
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const changeY = 0.001 * elapsed * velocityY;
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bullets.forEach((bullet, index) => {
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const deleteCount = 1;
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bullets[index].time -= elapsed;
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if (bullets[index].time > 0) {
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bullets[index].y += 0.001 * elapsed * bullets[index].vy;
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bullets[index].x += 0.001 * elapsed * bullets[index].vx;
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let [bx, by] = wrapPos(bullets[index].x, bullets[index].y)
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bullets[index].x = bx;
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bullets[index].y = by;
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bullet.node.style.transform = `translate(${bx}px, ${by}px)`;
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} else {
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bullet.node.remove();
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bullets.splice(index, deleteCount);
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}
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});
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let [x, y] = getTranslate(hitbox);
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let positionX = changeX + +x;
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let positionY = changeY + +y;
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if (positionY > 150) positionY += -300;
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else if (positionY < -150) positionY += 300;
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if (positionX > 200) positionX += -400;
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else if (positionX < -200) positionX += 400;
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const radius = 5;
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const pt = document.querySelector('svg').createSVGPoint();
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pt.x = positionX;
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pt.y = positionY;
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if (r1.isPointInFill(pt))
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r1.setAttribute('fill', 'red');
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else
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r1.setAttribute('fill', 'black');
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hitbox.style.transform = `translate(${positionX}px, ${positionY}px)`;
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// if (+y < 200)
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// if (timestamp < 10000)
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requestAnimationFrame(t => animate(t));
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}
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let force = 1;
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let spacePressed = false;
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let upPressed = false;
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let downPressed = false;
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let leftPressed = false;
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let rightPressed = false;
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let rotateCWPressed = false;
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let rotateCCWPressed = false;
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document.addEventListener("keydown", function(e) {
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switch (e.code) {
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case "Space":
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if (!spacePressed) {
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spacePressed = true;
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const [x, y] = getTranslate(hitbox);
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fireBullet(x, y, velocity);
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}
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break;
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case "KeyW":
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case "ArrowUp":
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if (!upPressed) {
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upPressed = true;
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acceleration[1] += -force;
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}
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break;
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case "KeyS":
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case "ArrowDown":
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if (!downPressed) {
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downPressed = true;
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acceleration[1] += force;
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}
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break;
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case "KeyA":
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case "ArrowLeft":
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if (!leftPressed) {
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leftPressed = true;
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acceleration[0] += -force;
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}
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break;
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case "KeyD":
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case "ArrowRight":
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if (!rightPressed) {
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rightPressed = true;
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acceleration[0] += force;
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}
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break;
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case "KeyQ":
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case "Comma":
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if (!rotateCCWPressed) {
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rotateCCWPressed = true;
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rotate += -1;
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}
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break;
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case "KeyE":
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case "Period":
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if (!rotateCWPressed) {
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rotateCWPressed = true;
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rotate += 1;
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}
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break;
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}
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});
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document.addEventListener("keyup", function(e) {
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switch (e.code) {
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case "Space":
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spacePressed = false;
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break;
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case "KeyW":
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case "ArrowUp":
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if (upPressed) {
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upPressed = false;
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acceleration[1] -= -force;
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}
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break;
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case "KeyS":
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case "ArrowDown":
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if (downPressed) {
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downPressed = false;
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acceleration[1] -= force;
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}
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break;
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case "KeyA":
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case "ArrowLeft":
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if (leftPressed) {
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leftPressed = false;
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acceleration[0] -= -force;
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}
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break;
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case "KeyD":
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case "ArrowRight":
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if (rightPressed) {
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rightPressed = false;
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acceleration[0] -= force;
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}
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break;
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case "KeyQ":
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case "Comma":
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if (rotateCCWPressed) {
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rotateCCWPressed = false;
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rotate -= -1;
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}
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break;
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case "KeyE":
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case "Period":
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if (rotateCWPressed) {
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rotateCWPressed = false;
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rotate -= 1;
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}
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break;
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}
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});
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leftTurnButton.addEventListener("mousedown", function (e) {
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acceleration[0] = -force;
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});
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leftTurnButton.addEventListener("mouseup", function (e) {
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acceleration[0] = 0;
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});
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rightTurnButton.addEventListener("mousedown", function (e) {
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acceleration[0] = force;
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});
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rightTurnButton.addEventListener("mouseup", function (e) {
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acceleration[0] = 0;
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});
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reverseMoveButton.addEventListener("mousedown", function (e) {
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acceleration[1] = -force;
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});
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reverseMoveButton.addEventListener("mouseup", function (e) {
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acceleration[1] = 0;
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});
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forwardMoveButton.addEventListener("mousedown", function (e) {
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acceleration[1] = force;
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});
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forwardMoveButton.addEventListener("mouseup", function (e) {
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acceleration[1] = 0;
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});
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rotateCWButton.addEventListener("mousedown", function (e) {
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rotate = 1;
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});
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rotateCWButton.addEventListener("mouseup", function (e) {
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rotate = 0;
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});
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rotateCCWButton.addEventListener("mousedown", function (e) {
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rotate = -1;
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});
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rotateCCWButton.addEventListener("mouseup", function (e) {
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rotate = 0;
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});
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fireButton.addEventListener("click", function (e) {
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const [x, y] = getTranslate(hitbox);
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fireBullet(x, y, velocity);
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});
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//]]></script>
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</svg>
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