54 lines
1.3 KiB
JavaScript
54 lines
1.3 KiB
JavaScript
const consoleCode = document.querySelector("#console-code");
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export const width = 480;
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export const height = 360;
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const canvas = document.querySelector("canvas");
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canvas.width = width;
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canvas.height = height;
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const cx = canvas.getContext("2d");
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cx.imageSmoothingEnabled = false;
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export function rgb(red, green, blue) {
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return `rgb(${red}, ${green}, ${blue})`;
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}
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export function clear(color) {
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cx.fillStyle = color;
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cx.fillRect(0, 0, width, height);
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}
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export function drawRect(x, y, width, height, color) {
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cx.fillStyle = color;
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cx.fillRect(x, y, width, height);
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}
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export function println(msg) {
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if (consoleCode) {
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consoleCode.textContent += `${msg}\n`;
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} else {
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console.log(msg);
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}
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}
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export function startGameLoop(loopFunction) {
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let before = Date.now();
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const loopInterval = setInterval(() => {
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const now = Date.now();
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const deltaT = (now - before) / 1000;
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before = now;
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loopFunction(deltaT);
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}, 16);
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const abortSignal = globalThis.libInternalAbortController.signal;
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if (abortSignal) {
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if (abortSignal.aborted) {
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clearInterval(loopInterval);
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}
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abortSignal.addEventListener("abort", () => {
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clearInterval(loopInterval);
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});
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}
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}
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