remove ignored files
This commit is contained in:
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412bd60c8c
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f5a722dd3c
67
bezier-1.js
67
bezier-1.js
@ -1,67 +0,0 @@
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const common_js_1 = require("./common.js");
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let points = [];
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function update(ctx, time) {
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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const p = (Math.sin(0.001 * time) + 1.0) * 0.5;
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if (points.length == 2) {
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const [start, end] = points;
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(0, common_js_1.drawCircle)(ctx, (0, common_js_1.lerp)(start, end, p), 1, 0xFF0000);
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}
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else if (points.length === 3) {
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const [a, b, c] = points;
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const ab = (0, common_js_1.lerp)(a, b, p);
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const bc = (0, common_js_1.lerp)(b, c, p);
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const abc = (0, common_js_1.lerp)(ab, bc, p);
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(0, common_js_1.drawDashedLine)(ctx, ab, bc, 0xFF0000);
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(0, common_js_1.drawCircle)(ctx, ab, 1, 0xFF0000);
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(0, common_js_1.drawCircle)(ctx, bc, 1, 0xFF0000);
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(0, common_js_1.drawCircle)(ctx, abc, 1, 0xFFFFFF);
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}
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else if (points.length === 4) {
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const [a, b, c, d] = points;
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const ab = (0, common_js_1.lerp)(a, b, p);
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const bc = (0, common_js_1.lerp)(b, c, p);
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const cd = (0, common_js_1.lerp)(c, d, p);
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const abc = (0, common_js_1.lerp)(ab, bc, p);
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const bcd = (0, common_js_1.lerp)(bc, cd, p);
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const abcd = (0, common_js_1.lerp)(abc, bcd, p);
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(0, common_js_1.drawDashedLine)(ctx, ab, bc, 0xFF0000);
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(0, common_js_1.drawDashedLine)(ctx, bc, cd, 0xFF0000);
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(0, common_js_1.drawDashedLine)(ctx, abc, bcd, 0xFFFF00);
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(0, common_js_1.drawCircle)(ctx, ab, 1, 0xFF0000);
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(0, common_js_1.drawCircle)(ctx, bc, 1, 0xFF0000);
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(0, common_js_1.drawCircle)(ctx, cd, 1, 0xFF0000);
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(0, common_js_1.drawCircle)(ctx, abc, 1, 0xFFFF00);
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(0, common_js_1.drawCircle)(ctx, bcd, 1, 0xFFFF00);
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(0, common_js_1.drawCircle)(ctx, abcd, 1, 0xFFFFFF);
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}
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for (let i = 0; i < points.length - 1; ++i) {
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const current = points[i];
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const next = points[i + 1];
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(0, common_js_1.drawLine)(ctx, current, next, 0xFF00FF);
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}
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for (const point of points) {
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(0, common_js_1.drawCircle)(ctx, point, 1, 0xFF00FF);
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}
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window.requestAnimationFrame(t => update(ctx, t));
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}
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function init() {
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const canvas = document.getElementById("game");
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if (!canvas)
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throw new Error("unable to get canvas HTML element");
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const ctx = canvas.getContext("2d");
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if (!ctx)
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throw new Error("unable to get canvas 2D context");
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(0, common_js_1.resizeCanvas)(ctx); // Init canvas to full window size
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canvas.addEventListener("click", (evt) => {
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const { clientX, clientY } = evt;
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if (points.length < 4) {
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points.push({ x: clientX, y: clientY });
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}
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});
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window.addEventListener('resize', () => (0, common_js_1.resizeCanvas)(ctx));
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window.requestAnimationFrame(t => update(ctx, t));
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}
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init();
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58
bezier-2.js
58
bezier-2.js
@ -1,58 +0,0 @@
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const common_js_1 = require("./common.js");
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function drawPoints(ctx, points) {
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const [a, b, c, d] = points;
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(0, common_js_1.drawLine)(ctx, a, b, 0xFF00FF);
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(0, common_js_1.drawLine)(ctx, c, d, 0xFF00FF);
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for (const p of points) {
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(0, common_js_1.drawCircle)(ctx, p, 2, 0xFF00FF);
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}
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}
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function drawCurve(ctx, curve) {
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for (let i = 0; i < curve.length - 1; ++i) {
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(0, common_js_1.drawLine)(ctx, curve[i], curve[i + 1], 0xFFFFFF);
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}
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}
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function init() {
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const canvas = document.getElementById("game");
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if (!canvas)
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throw new Error("unable to get canvas HTML element");
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const ctx = canvas.getContext("2d");
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if (!ctx)
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throw new Error("unable to get canvas 2D context");
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let selection = undefined;
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let points = [
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{ x: 227, y: 434 },
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{ x: 341, y: 234 },
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{ x: 649, y: 255 },
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{ x: 765, y: 450 },
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];
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(0, common_js_1.resizeCanvas)(ctx); // Init canvas
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drawPoints(ctx, points);
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const bezier = (0, common_js_1.cubicBezier)(...points);
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drawCurve(ctx, bezier);
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canvas.onmousedown = (evt) => {
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const { clientX, clientY } = evt;
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for (const p of points) {
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if (Math.abs(p.x - clientX) < 10 && Math.abs(p.y - clientY) < 10) {
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selection = points.indexOf(p);
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}
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}
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};
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canvas.onmousemove = (evt) => {
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if (selection !== undefined) {
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points[selection].x = evt.clientX;
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points[selection].y = evt.clientY;
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// redraw
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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const bezier = (0, common_js_1.cubicBezier)(...points);
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drawCurve(ctx, bezier);
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drawPoints(ctx, points);
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}
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};
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canvas.onmouseup = () => {
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selection = undefined;
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};
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}
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init();
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68
common.js
68
common.js
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.lerp = lerp;
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exports.quadraticBezier = quadraticBezier;
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exports.cubicBezier = cubicBezier;
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exports.resizeCanvas = resizeCanvas;
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exports.drawCircle = drawCircle;
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exports.drawLine = drawLine;
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exports.drawDashedLine = drawDashedLine;
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function lerp(a, b, p) {
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return {
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x: a.x + (b.x - a.x) * p,
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y: a.y + (b.y - a.y) * p
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};
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}
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function quadraticBezier(a, b, c, res = 0.05) {
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const eps = 0.001; // to prevent issues with float comparaison (p <= 1)
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const curve = [];
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for (let p = 0; p - 1 < eps; p += res) {
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const ab = lerp(a, b, p);
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const bc = lerp(b, c, p);
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const abc = lerp(ab, bc, p);
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curve.push(abc);
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}
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return curve;
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}
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function cubicBezier(a, b, c, d, res = 0.05) {
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const eps = 0.001; // to prevent issues with float comparaison (p <= 1)
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const curve = [];
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for (let p = 0; p - 1 < eps; p += res) {
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const ab = lerp(a, b, p);
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const bc = lerp(b, c, p);
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const cd = lerp(c, d, p);
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const abc = lerp(ab, bc, p);
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const bcd = lerp(bc, cd, p);
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const abcd = lerp(abc, bcd, p);
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curve.push(abcd);
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}
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return curve;
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}
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function resizeCanvas(ctx) {
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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ctx.canvas.width = window.innerWidth;
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ctx.canvas.height = window.innerHeight;
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}
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function drawCircle(ctx, center, radius, color) {
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ctx.save();
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ctx.beginPath();
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ctx.arc(center.x, center.y, radius, 0, 2 * Math.PI);
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ctx.strokeStyle = `#${color.toString(16)}`;
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ctx.lineWidth = 5;
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ctx.stroke();
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ctx.restore();
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}
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function drawLine(ctx, start, end, color, dashed = false) {
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ctx.save();
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ctx.beginPath();
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if (dashed)
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ctx.setLineDash([5, 5]);
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ctx.strokeStyle = `#${color.toString(16)}`;
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ctx.moveTo(start.x, start.y);
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ctx.lineTo(end.x, end.y);
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ctx.stroke();
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ctx.restore();
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}
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function drawDashedLine(ctx, start, end, color) {
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drawLine(ctx, start, end, color, true);
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}
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96
image.js
96
image.js
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"use strict";
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const canvas = document.getElementById("game");
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if (!canvas)
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throw new Error("unable to get canvas HTML element");
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const ctx = canvas.getContext("2d");
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if (!ctx)
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throw new Error("unable to get canvas 2D context");
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const img = new Image();
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img.crossOrigin = "anonymous";
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img.src = "/rose.png";
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img.onload = () => {
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/*canvas.offscreenCanvas = document.createElement("canvas");
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canvas.offscreenCanvas.height = img.height;
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canvas.offscreenCanvas.width = img.width;
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canvas.offscreenCanvas.getContext("2d").drawImage(img, 0, 0);
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*/
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ctx.drawImage(img, 0, 0);
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};
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function invert(imgData) {
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const data = imgData.data;
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for (let i = 0; i < data.length; i += 4) {
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//const avg = (data[i] + data[i + 1] + data[i + 2]) / 3;
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data[i] = 255 - data[i];
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data[i + 1] = 255 - data[i + 1];
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data[i + 2] = 255 - data[i + 2];
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}
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}
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function greyscale(imgData) {
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const data = imgData.data;
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for (let i = 0; i < data.length; i += 4) {
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const avg = (data[i] + data[i + 1] + data[i + 2]) / 3;
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data[i] = avg;
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data[i + 1] = avg;
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data[i + 2] = avg;
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}
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}
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function clamp(x, min, max) {
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return Math.min(Math.max(x, min), max);
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}
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function convolve(imageData, kernel) {
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const width = imageData.width;
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const height = imageData.height;
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const data = imageData.data;
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const out = new ImageData(width, height);
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const kernelSize = Math.sqrt(kernel.length); // Assuming kernel is square
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const halfKernel = Math.floor(kernelSize / 2);
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for (let y = 0; y < height; y++) {
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for (let x = 0; x < width; x++) {
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let r = 0, g = 0, b = 0;
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for (let ky = -halfKernel; ky <= halfKernel; ky++) {
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for (let kx = -halfKernel; kx <= halfKernel; kx++) {
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const px = x + kx;
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const py = y + ky;
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if (px >= 0 && px < width && py >= 0 && py < height) {
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const idx = (py * width + px) * 4;
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const kernelValue = kernel[(ky + halfKernel) * kernelSize + (kx + halfKernel)];
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r += data[idx] * kernelValue;
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g += data[idx + 1] * kernelValue;
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b += data[idx + 2] * kernelValue;
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}
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}
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}
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out.data[(y * width + x) * 4] = r;
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out.data[(y * width + x) * 4 + 1] = g;
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out.data[(y * width + x) * 4 + 2] = b;
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out.data[(y * width + x) * 4 + 3] = data[(y * width + x) * 4 + 3]; // preserve original alpha
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}
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}
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return out;
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}
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// multiply two 3x3 matrices
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function matMult(a, b) {
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const result = new Array(9).fill(0);
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for (let j = 0; j < 3; ++j) {
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for (let i = 0; i < 3; ++i) {
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for (let k = 0; k < 3; ++k) {
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result[j * 3 + i] += a[j * 3 + k] * b[k * 3 + i];
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}
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}
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}
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return result;
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}
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canvas.onclick = () => {
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const imgData = ctx.getImageData(0, 0, canvas.width, canvas.height);
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ctx.clearRect(0, 0, canvas.height, canvas.width);
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//invert(imgData);
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//greyscale(imgData);
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//const identityKernel = [0, 0, 0, 0, 1, 0, 0, 0, 0];
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const gaussianKernel = [0.075, 0.124, 0.075, 0.124, 0.204, 0.124, 0.075, 0.124, 0.075];
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const convolved = convolve(imgData, gaussianKernel);
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ctx.putImageData(convolved, 0, 0);
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};
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const matrixA = [1, 2, 3, 4, 5, 6, 7, 8, 9];
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const matrixB = [9, 8, 7, 6, 5, 4, 3, 2, 1];
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const result = matMult(matrixA, matrixB);
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console.log(result);
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87
spline.js
87
spline.js
@ -1,87 +0,0 @@
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const common_js_1 = require("./common.js");
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function drawPoints(ctx, points) {
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for (const p of points) {
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(0, common_js_1.drawCircle)(ctx, p, 2, 0xFF00FF);
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}
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}
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function drawCurve(ctx, curve) {
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for (let i = 0; i < curve.length - 1; ++i) {
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(0, common_js_1.drawLine)(ctx, curve[i], curve[i + 1], 0xFFFFFF);
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}
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}
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function draw(ctx, points) {
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let start = 0;
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while (true) {
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const sl = points.slice(start, start + 4);
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if (sl.length === 4) {
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const bezier = (0, common_js_1.cubicBezier)(...sl);
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drawCurve(ctx, bezier);
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start += 3;
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}
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else if (sl.length === 3) {
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const bezier = (0, common_js_1.quadraticBezier)(...sl);
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drawCurve(ctx, bezier);
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start += 2;
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}
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else {
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break;
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}
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}
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drawPoints(ctx, points);
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}
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function init() {
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const canvas = document.getElementById("game");
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if (!canvas)
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throw new Error("unable to get canvas HTML element");
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const ctx = canvas.getContext("2d");
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if (!ctx)
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throw new Error("unable to get canvas 2D context");
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let selection = undefined;
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let points = [
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{ x: 227, y: 434 },
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{ x: 341, y: 234 },
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{ x: 649, y: 255 },
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{ x: 765, y: 450 },
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{ x: 800, y: 500 },
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{ x: 850, y: 450 },
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{ x: 900, y: 550 },
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];
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(0, common_js_1.resizeCanvas)(ctx); // Init canvas
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draw(ctx, points);
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canvas.oncontextmenu = (evt) => {
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evt.preventDefault();
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points = [];
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// redraw
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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draw(ctx, points);
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};
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canvas.onmousedown = (evt) => {
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const { clientX, clientY } = evt;
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for (const p of points) {
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if (Math.abs(p.x - clientX) < 10 && Math.abs(p.y - clientY) < 10) {
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selection = points.indexOf(p);
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}
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}
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if (selection === undefined) {
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points.push({ x: clientX, y: clientY });
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// redraw
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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draw(ctx, points);
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}
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};
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canvas.onmousemove = (evt) => {
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if (selection !== undefined) {
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points[selection].x = evt.clientX;
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points[selection].y = evt.clientY;
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// redraw
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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draw(ctx, points);
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}
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};
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canvas.onmouseup = () => {
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selection = undefined;
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};
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}
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init();
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