121 lines
2.7 KiB
JavaScript
121 lines
2.7 KiB
JavaScript
//jshint esversion:8
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let c = document.getElementById("myCanvas");
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let ctx = c.getContext("2d");
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ctx.canvas.width = window.innerWidth;
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ctx.canvas.height = window.innerHeight;
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centerX = ctx.canvas.width / 2;
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centerY = ctx.canvas.height / 2;
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let deg_per_sec = 5;
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let targetFps = 60;
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let frameDuration = 1000 / targetFps;
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let rotation = 0; //was = j = angle
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let paused = true;
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render_clear();
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let drawObj = null;
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function createInstance(className, args) {
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const classMap = {
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PolyTwistColourWidth: PolyTwistColourWidth,
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FloralPhyllo: FloralPhyllo,
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Spiral1: Spiral1,
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// Add more class constructors here as needed
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};
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if (classMap.hasOwnProperty(className)) {
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return new classMap[className](...args);
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} else {
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throw new Error(`Unknown class name: ${className}`);
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}
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}
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async function updateDrawObj() {
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const shapeSelector = document.getElementById("shape-selector");
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const selectedShape = shapeSelector.value;
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const config = await fetchConfig(selectedShape);
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if (drawObj) {
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drawObj.remove(); // Remove the previous instance
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}
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// Extract default values from the configuration
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const defaultValues = config
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// .filter((item) => item.type !== "color") // Exclude color inputs
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.map((item) => item.defaultValue);
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drawObj = createInstance(selectedShape, defaultValues);
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drawObj.initialise(config);
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}
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updateDrawObj();
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function render() {
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setTimeout(() => {
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requestAnimationFrame(() => {
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render_clear();
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if (drawObj) {
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drawObj.draw(rotation);
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}
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if (!paused) {
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rotation += deg_per_sec / targetFps;
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}
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});
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render();
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}, frameDuration);
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}
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document
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.getElementById("shape-selector")
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.addEventListener("change", updateDrawObj);
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let toolbarShowing = true;
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document.addEventListener("keydown", toggleSettings);
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function toggleSettings(e) {
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if (e.key == "p") {
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toolbarShowing = !toolbarShowing;
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}
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if (e.code === "Space") {
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paused = !paused;
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}
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let tb = document.getElementById("toolbar");
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if (toolbarShowing) {
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tb.style.display = "flex";
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} else {
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tb.style.display = "none";
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}
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}
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function TogglePause() {
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let pb = document.getElementById("pauseButton");
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paused = !paused;
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if (paused) {
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pb.textContent = "Play";
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} else {
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pb.textContent = "Pause";
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}
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}
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function Reset() {
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rotation = 0; //was = j = angle
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currentFrame = 0;
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}
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function ForwardFrame() {
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rotation += deg_per_sec / fps; // was = j = innerRotation, now = rotation
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currentFrame += 1; // was = i
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}
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function BackwardFrame() {
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rotation -= deg_per_sec / fps; // was = j = innerRotation, now = rotation
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currentFrame -= 1; // was = i
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}
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function ChangeDegPerSec(newValue) {
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deg_per_sec = newValue;
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}
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window.onload = render;
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