thib8956/test-canvas
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small refactor and reformat

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This commit is contained in:
Thibaud Gasser 2024-09-23 22:27:18 +02:00
parent 9dd3b6487a
commit 8c9ad7fdc3
1 changed files with 46 additions and 65 deletions
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29
main.js
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@ -1,28 +1,9 @@
function drawCross(ctx, hue) {
ctx.beginPath();
ctx.moveTo(200, 200);
ctx.lineTo(300, 300);
ctx.moveTo(300, 200);
ctx.lineTo(200, 300);
ctx.lineWidth = 5;
ctx.strokeStyle = `hsla(${hue}, 100%, 50%, 1)`;
ctx.stroke();
}
function drawCircle(ctx) {
ctx.beginPath();
// arc(x, y, radius, startAngle, endAngle)
ctx.arc(75, 75, 50, 0, Math.PI * 2);
ctx.stroke();
}
let startTime = undefined;
let shapes = [];
let pendingClicks = [];
function animate(ctx, time) {
function update(ctx, time) {
if (!startTime) {
startTime = time;
}
@ -50,7 +31,7 @@ function animate(ctx, time) {
}
}
window.requestAnimationFrame(time => animate(ctx, time));
window.requestAnimationFrame(time => update(ctx, time));
}
function drawAnimatedCircle(ctx, dt, x, y, hue) {
@ -98,9 +79,6 @@ function init() {
const ctx = canvas.getContext("2d");
resizeCanvas(ctx); // Init canvas
window.addEventListener('resize', () => resizeCanvas(ctx));
window.requestAnimationFrame(time => animate(ctx, time))
canvas.addEventListener("click", (evt) => {
const {clientX, clientY} = evt;
pendingClicks.push({x: clientX, y: clientY, kind: "circle"});
@ -111,6 +89,9 @@ function init() {
const {clientX, clientY} = evt;
pendingClicks.push({x: clientX, y: clientY, kind: "cross"});
});
window.addEventListener('resize', () => resizeCanvas(ctx));
window.requestAnimationFrame(time => update(ctx, time))
}
}