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gamepad.html
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gamepad.html
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<!DOCTYPE html>
<html>
<head>
<title> kill me </title>
<style>
html, body {
margin: 0 !important;
padding: 3 !important;
overflow: hidden;
}
body {
background-color: #000000;
}
#canvas {
position: absolute;
}
</style>
<script>
// JavaScript here
var canvas = null;
var ctx = null;
var a1x = 0;
var a1y = 0;
var a2x = 0;
var a2y = 0;
function main() {
canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
window.requestAnimationFrame(tick);
}
function render() {
ctx.fillStyle = "#222222";
ctx.fillRect(0, 0, canvas.width, canvas.height);
gamepad({
"x": 100,
"y": 100,
"s": 500,
});
}
function gamepad(p) {
const r1 = p.s * 0.2;
const c = p.s * 0.02;
ctx.strokeStyle = "#FFFFFF";
ctx.lineWidth = 3;
ctx.beginPath();
ctx.arc(p.x + r1, p.y + r1, r1, 0, 2 * Math.PI);
ctx.stroke();
ctx.strokeStyle = "#FF0000";
ctx.beginPath();
ctx.arc(p.x + r1 + (r1 * a1x), p.y + r1 + (r1 * a1y), c, 0, 2 * Math.PI);
ctx.fill();
ctx.stroke();
ctx.strokeStyle = "#FFFFFF";
ctx.lineWidth = 3;
ctx.beginPath();
ctx.arc(p.x + r1 + p.s * 0.5, p.y + r1, r1, 0, 2 * Math.PI);
ctx.stroke();
ctx.strokeStyle = "#FF0000";
ctx.beginPath();
ctx.arc(p.x + r1 + p.s * 0.5 + (r1 * a2x), p.y + r1 + (r1 * a2y), c, 0, 2 * Math.PI);
ctx.fill();
ctx.stroke();
}
function updateValues(i) {
const g = navigator.getGamepads()[i];
a1x = g.axes[0];
a1y = g.axes[1];
a2x = g.axes[2];
a2y = g.axes[3];
}
function tick() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
if (controllerIndex !== null) {
updateValues(controllerIndex);
}
render();
window.requestAnimationFrame(tick);
}
document.addEventListener("DOMContentLoaded", main);
document.addEventListener("mousemove", (e) => {
/*
a1x = (e.clientX - 200);
a1y = (e.clientY - 200);
m = Math.sqrt(a1x * a1x + a1y * a1y);
a1x /= m;
a1y /= m;
*/
});
document.addEventListener("gamepadconnected", (e) => {
controllerIndex = e.gamepad.index;
});
document.addEventListener("gamepaddisconnected", (e) => {
controllerIndex = null;
});
</script>
</head>
<body>
<canvas id=canvas> </canvas>
</body>
</html>