Naloga 2: C0 and C1
This commit is contained in:
Gašper Dobrovoljc
parent
0671004a38
commit
4de1f25a6a
@ -13,8 +13,20 @@
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padding: 0;
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overflow: hidden;
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}
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#menu {
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position: fixed;
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display: flex;
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padding: 8px;
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gap: 8px;
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}
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</style>
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<body>
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<div id="menu">
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<button id="add">Dodaj zlepek</button>
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<button id="remove">Izbriši zlepek</button>
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<button id="c0">Zagotovi zveznost</button>
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<button id="c1">Zagotovi gladkost</button>
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</div>
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<canvas></canvas>
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</body>
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</html>
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255
naloga_2/main.js
255
naloga_2/main.js
@ -1,28 +1,91 @@
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const addButton = document.getElementById('add');
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const removeButton = document.getElementById('remove');
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const c0Button = document.getElementById('c0');
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const c1Button = document.getElementById('c1');
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const canvas = document.querySelector('canvas');
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const context = canvas.getContext('2d');
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/** @type {number[][]} */
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const points = [];
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let adding = false;
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/** @type {number|null} */
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let selected = null;
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let mouseDown = false;
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/** @type {number|null} */
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let movePointIndex = null;
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/** @type {number[][][]} */
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const curves = [];
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addButton.addEventListener('click', () => {
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adding = true;
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curves.push([]);
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selected = curves.length - 1;
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});
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removeButton.addEventListener('click', () => {
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if (selected === null) return;
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curves.splice(selected, 1);
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selected = null;
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draw();
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});
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c0Button.addEventListener('click', () => {
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if (curves.length <= 1 || selected === null) return;
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let p = getClosestEndPoint(curves[selected][0][0], curves[selected][0][1]);
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if (p === null) return;
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let [curveIndex, pointIndex] = p;
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curves[selected][0] = curves[curveIndex][pointIndex];
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p = getClosestEndPoint(curves[selected][3][0], curves[selected][3][1]);
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if (p === null) return;
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[curveIndex, pointIndex] = p;
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curves[selected][3] = curves[curveIndex][pointIndex];
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draw();
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});
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c1Button.addEventListener('click', () => {
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if (curves.length <= 1 || selected === null) return;
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let [curveIndex, pointIndex] = getClosestEndPoint(
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curves[selected][0][0],
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curves[selected][0][1],
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);
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// Move first point of selected curve to closest found point
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curves[selected][0] = curves[curveIndex][pointIndex];
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// Get control point of found point
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const h1 = curves[curveIndex][pointIndex === 0 ? 1 : 2];
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// Set control point to location mirrored over the first point
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curves[selected][1] = [
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2 * curves[selected][0][0] - h1[0],
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2 * curves[selected][0][1] - h1[1],
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];
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[curveIndex, pointIndex] = getClosestEndPoint(
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curves[selected][3][0],
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curves[selected][3][1],
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);
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curves[selected][3] = curves[curveIndex][pointIndex];
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const h2 = curves[curveIndex][pointIndex === 0 ? 1 : 2];
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curves[selected][2] = [
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2 * curves[selected][3][0] - h2[0],
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2 * curves[selected][3][1] - h2[1],
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];
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draw();
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});
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/**
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* @param {number} x
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* @param {number} y
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*/
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function addPoint(x, y) {
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if (points.length === 0) {
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points.push([x, y]);
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return;
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}
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if (points.length === 1) {
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const h1x = lerp(0.25, points[0][0], x);
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const h1y = lerp(0.25, points[0][1], y);
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const h2x = lerp(0.75, points[0][0], x);
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const h2y = lerp(0.75, points[0][1], y);
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points.push([h1x, h1y], [h2x, h2y], [x, y]);
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return;
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const curve = curves[curves.length - 1];
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curve.push([x, y]);
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if (curve.length === 4) {
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adding = false;
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}
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draw();
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}
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/**
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@ -40,13 +103,14 @@ function lerp(t, a, b) {
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* @param {number} t
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* @param {number[]} p array of points
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*/
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function curve(t, p) {
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function lerpCurve(t, p) {
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if (p.length === 1) return p[0];
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return lerp(t, curve(t, p.slice(0, -1)), curve(t, p.slice(1)));
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return lerp(t, lerpCurve(t, p.slice(0, -1)), lerpCurve(t, p.slice(1)));
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}
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function drawCircles() {
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for (const [x, y] of points) {
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if (selected === null) return;
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for (const [x, y] of curves[selected]) {
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context.beginPath();
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context.ellipse(x, y, 10, 10, 0, 0, Math.PI * 2);
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context.stroke();
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@ -54,35 +118,40 @@ function drawCircles() {
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}
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function drawLines() {
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for (let i = 0; i < points.length - 3; i += 3) {
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const p1 = points[i];
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const p2 = points[i + 1];
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const p3 = points[i + 2];
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const p4 = points[i + 3];
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for (let i = 0; i < curves.length; i++) {
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const curve = curves[i];
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for (let j = 0; j < curve.length - 3; j += 3) {
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const p1 = curve[j];
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const p2 = curve[j + 1];
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const p3 = curve[j + 2];
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const p4 = curve[j + 3];
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context.beginPath();
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context.beginPath();
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context.moveTo(p1[0], p1[1]);
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context.lineTo(p2[0], p2[1]);
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if (selected === i) {
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context.moveTo(p1[0], p1[1]);
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context.lineTo(p2[0], p2[1]);
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context.moveTo(p3[0], p3[1]);
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context.lineTo(p4[0], p4[1]);
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context.moveTo(p3[0], p3[1]);
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context.lineTo(p4[0], p4[1]);
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}
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context.moveTo(p1[0], p1[1]);
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for (let t = 0; t <= 1; t += 0.01) {
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const x = curve(t, [p1[0], p2[0], p3[0], p4[0]]);
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const y = curve(t, [p1[1], p2[1], p3[1], p4[1]]);
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context.moveTo(p1[0], p1[1]);
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for (let t = 0; t <= 100; t++) {
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const tt = t / 100;
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const x = lerpCurve(tt, [p1[0], p2[0], p3[0], p4[0]]);
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const y = lerpCurve(tt, [p1[1], p2[1], p3[1], p4[1]]);
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context.lineTo(x, y);
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context.lineTo(x, y);
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}
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context.stroke();
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}
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context.stroke();
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}
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}
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function draw() {
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context.clearRect(0, 0, canvas.width, canvas.height);
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if (points.length <= 0) return;
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drawCircles();
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drawLines();
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@ -94,10 +163,120 @@ function resizeCanvas() {
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draw();
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}
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window.addEventListener('mousedown', (e) => {
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addPoint(e.pageX, e.pageY);
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/**
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* Gets the index of the closest curve to the point
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* @param {number} x
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* @param {number} y
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* @returns {number|null}
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*/
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function getClosestCurveIndex(x, y) {
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/** @type {number|null} */
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let minDist = null;
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/** @type {number|null} */
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let minIndex = null;
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for (let i = 0; i < curves.length; i++) {
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for (const point of curves[i]) {
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const dist = Math.abs(
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Math.sqrt((x - point[0]) ** 2 + (y - point[1]) ** 2),
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);
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if (!minDist || dist < minDist) {
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minDist = dist;
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minIndex = i;
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}
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}
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}
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return minIndex;
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}
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/**
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* Gets the selected curve point under the mouse
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* @param {number} x
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* @param {number} y
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* @returns {number|null}
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*/
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function getSelectedPoint(x, y) {
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if (selected === null) return null;
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for (let i = 0; i < curves[selected].length; i++) {
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const point = curves[selected][i];
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const dist = Math.abs(
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Math.sqrt((x - point[0]) ** 2 + (y - point[1]) ** 2),
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);
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if (dist <= 10) {
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return i;
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}
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}
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return null;
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}
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/**
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* Gets the closest end point
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* @param {number} x
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* @param {number} y
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* @returns {number[]|null}
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*/
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function getClosestEndPoint(x, y) {
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/** @type {number|null} */
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let minDist = null,
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minCurveIndex = null,
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minPointIndex = null;
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for (let i = 0; i < curves.length; i++) {
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if (i === selected) continue;
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let dist = Math.abs(
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Math.sqrt((x - curves[i][0][0]) ** 2 + (y - curves[i][0][1]) ** 2),
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);
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if (minDist === null || dist < minDist) {
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minDist = dist;
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minCurveIndex = i;
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minPointIndex = 0;
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}
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dist = Math.abs(
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Math.sqrt((x - curves[i][3][0]) ** 2 + (y - curves[i][3][1]) ** 2),
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);
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if (minDist === null || dist < minDist) {
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minDist = dist;
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minCurveIndex = i;
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minPointIndex = 3;
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}
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}
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return [minCurveIndex, minPointIndex];
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}
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canvas.addEventListener('mousedown', (e) => {
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mouseDown = true;
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if (adding) {
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addPoint(e.pageX, e.pageY);
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return;
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}
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const point = getSelectedPoint(e.pageX, e.pageY);
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if (point !== null) {
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movePointIndex = point;
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return;
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}
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const i = getClosestCurveIndex(e.pageX, e.pageY);
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if (i === null) return;
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selected = i;
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draw();
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});
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canvas.addEventListener('mousemove', (e) => {
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if (!mouseDown) return;
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if (movePointIndex === null) return;
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curves[selected][movePointIndex] = [e.pageX, e.pageY];
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draw();
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});
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canvas.addEventListener('mouseup', () => {
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mouseDown = false;
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movePointIndex = null;
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});
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window.addEventListener('resize', resizeCanvas);
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resizeCanvas();
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6006
vaja_1/glm.js
Normal file
6006
vaja_1/glm.js
Normal file
File diff suppressed because it is too large
Load Diff
188
vaja_1/main.js
188
vaja_1/main.js
@ -1,51 +1,33 @@
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import { mat4 } from './glm.js';
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// Initialize WebGPU
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const adapter = await navigator.gpu.requestAdapter();
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const device = await adapter.requestDevice();
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const canvas = document.querySelector('canvas');
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const context = canvas.getContext('webgpu');
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const format = 'rgba8unorm';
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const format = navigator.gpu.getPreferredCanvasFormat();
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context.configure({ device, format });
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// Create shaders
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const code = await fetch('shader.wgsl').then((res) => res.text());
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const module = device.createShaderModule({ code });
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// Create vertex buffer layouts
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/** @type {GPUVertexBufferLayout} */
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const vertexBufferLayout = {
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arrayStride: 32,
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attributes: [
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{
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offset: 0,
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format: 'float32x4',
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shaderLocation: 0,
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},
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{
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offset: 16,
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format: 'float32x4',
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shaderLocation: 1,
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},
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],
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};
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// Create render pipeline
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const pipeline = device.createRenderPipeline({
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vertex: {
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module,
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buffers: [vertexBufferLayout],
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},
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fragment: {
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module,
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targets: [{ format }],
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},
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layout: 'auto',
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// Create depth texture
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const depthTexture = device.createTexture({
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size: [canvas.width, canvas.height],
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usage: GPUTextureUsage.RENDER_ATTACHMENT,
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format: 'depth24plus',
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});
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// Create vertex buffer
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// prettier-ignore
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const vertices = new Float32Array([
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0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1,
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1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1,
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// position // color
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-1, -1, -1, 1, 1, 0, 0, 1,
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1, -1, -1, 1, 0, 1, 0, 1,
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-1, 1, -1, 1, 0, 0, 1, 1,
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1, 1, -1, 1, 1, 1, 0, 1,
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-1, 1, 1, 1, 1, 0, 0, 1,
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1, -1, 1, 1, 0, 1, 0, 1,
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-1, 1, 1, 1, 0, 0, 1, 1,
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1, 1, 1, 1, 1, 1, 0, 1,
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]);
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const vertexBuffer = device.createBuffer({
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@ -55,7 +37,16 @@ const vertexBuffer = device.createBuffer({
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device.queue.writeBuffer(vertexBuffer, 0, vertices);
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const indices = new Uint32Array([0, 1, 2, 1, 2, 3]);
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// Create index buffer
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// prettier-ignore
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const indices = new Uint32Array([
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0, 1, 2, 1, 2, 3,
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0, 1, 3, 1, 4, 5,
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0, 4, 2, 4, 2, 5,
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1, 5, 3, 5, 3, 7,
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2, 3, 6, 3, 6, 7,
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4, 5, 6, 5, 6, 7,
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]);
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const indexBuffer = device.createBuffer({
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size: indices.byteLength,
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@ -64,27 +55,114 @@ const indexBuffer = device.createBuffer({
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device.queue.writeBuffer(indexBuffer, 0, indices);
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// Create command encoder
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const commandEncoder = device.createCommandEncoder();
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// Fetch and compile shaders
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const code = await fetch('shader.wgsl').then((response) => response.text());
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const module = device.createShaderModule({ code });
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// Encode render pass
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const renderPass = commandEncoder.beginRenderPass({
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colorAttachments: [
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// Create the pipeline
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||||
/** @type {GPUVertexBufferLayout} */
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const vertexBufferLayout = {
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||||
arrayStride: 24,
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||||
attributes: [
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{
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||||
view: context.getCurrentTexture().createView(),
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||||
loadOp: 'clear',
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clearValue: [1, 1, 1, 1],
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storeOp: 'store',
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shaderLocation: 0,
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||||
offset: 0,
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||||
format: 'float32x2',
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},
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{
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shaderLocation: 1,
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offset: 8,
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format: 'float32x4',
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||||
},
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],
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};
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const pipeline = device.createRenderPipeline({
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vertex: {
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module,
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buffers: [vertexBufferLayout],
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},
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||||
fragment: {
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module,
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targets: [{ format }],
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},
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depthStencil: {
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depthWriteEnabled: true,
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depthCompare: 'less',
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format: 'depth24plus',
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},
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||||
layout: 'auto',
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});
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renderPass.setPipeline(pipeline);
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renderPass.setVertexBuffer(0, vertexBuffer);
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renderPass.setIndexBuffer(indexBuffer, 'uint32');
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renderPass.drawIndexed(indices.length);
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renderPass.end();
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||||
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const commandBuffer = commandEncoder.finish();
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// Create uniform buffer
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const uniformBuffer = device.createBuffer({
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size: 4 * 4 * 4,
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usage: GPUBufferUsage.UNIFORM | GPUBufferUsage.COPY_DST,
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});
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// Send commands to GPU
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device.queue.submit([commandBuffer]);
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// Create the bind group
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||||
const bindGroup = device.createBindGroup({
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||||
layout: pipeline.getBindGroupLayout(0),
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||||
entries: [{ binding: 0, resource: { buffer: uniformBuffer } }],
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||||
});
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||||
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||||
function update() {
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||||
// Animate the square
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||||
const time = performance.now() / 1000;
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||||
|
||||
const modelMatrix = mat4
|
||||
.create()
|
||||
.rotateX(time * 0.7)
|
||||
.rotateY(time);
|
||||
const viewMatrix = mat4.create().translate([0, 0, 5]).invert();
|
||||
const projectionMatrix = mat4.create().perspectiveZO(1, 1, 0.01, 100);
|
||||
|
||||
const matrix = mat4
|
||||
.create()
|
||||
.multiply(projectionMatrix)
|
||||
.multiply(viewMatrix)
|
||||
.multiply(modelMatrix);
|
||||
|
||||
// const radius = 0.5;
|
||||
// const frequency = 0.5;
|
||||
// const x = radius * Math.cos(frequency * time * 2 * Math.PI);
|
||||
// const y = radius * Math.sin(frequency * time * 2 * Math.PI);
|
||||
|
||||
device.queue.writeBuffer(uniformBuffer, 0, matrix);
|
||||
}
|
||||
|
||||
function render() {
|
||||
// Render the square
|
||||
const commandEncoder = device.createCommandEncoder();
|
||||
const renderPass = commandEncoder.beginRenderPass({
|
||||
colorAttachments: [
|
||||
{
|
||||
view: context.getCurrentTexture().createView(),
|
||||
loadOp: 'clear',
|
||||
clearValue: [1, 1, 1, 1],
|
||||
storeOp: 'store',
|
||||
},
|
||||
],
|
||||
depthStencilAttachment: {
|
||||
view: depthTexture.createView(),
|
||||
depthLoadOp: 'clear',
|
||||
depthClearValue: 1,
|
||||
depthStoreOp: 'discard',
|
||||
},
|
||||
});
|
||||
renderPass.setPipeline(pipeline);
|
||||
renderPass.setVertexBuffer(0, vertexBuffer);
|
||||
renderPass.setIndexBuffer(indexBuffer, 'uint32');
|
||||
renderPass.setBindGroup(0, bindGroup);
|
||||
renderPass.drawIndexed(indices.length);
|
||||
renderPass.end();
|
||||
device.queue.submit([commandEncoder.finish()]);
|
||||
}
|
||||
|
||||
function frame() {
|
||||
update();
|
||||
render();
|
||||
requestAnimationFrame(frame);
|
||||
}
|
||||
|
||||
requestAnimationFrame(frame);
|
||||
|
||||
@ -1,17 +1,38 @@
|
||||
struct VertexInput {
|
||||
@location(0) position: vec4f,
|
||||
@location(1) color: vec4f,
|
||||
}
|
||||
|
||||
struct VertexOutput {
|
||||
@builtin(position) position: vec4f,
|
||||
@location(0) color: vec4f,
|
||||
}
|
||||
|
||||
struct FragmentInput {
|
||||
@location(0) color: vec4f,
|
||||
}
|
||||
|
||||
struct FragmentOutput {
|
||||
@location(0) color: vec4f,
|
||||
}
|
||||
|
||||
@group(0) @binding(0) var<uniform> mtrx: mat4x4f;
|
||||
|
||||
@vertex
|
||||
fn vertex(@location(0) position: vec4f, @location(1) color: vec4f) -> VertexOutput {
|
||||
fn vertex(input: VertexInput) -> VertexOutput {
|
||||
var output: VertexOutput;
|
||||
output.position = position;
|
||||
output.color = color;
|
||||
|
||||
output.position = mtrx * input.position;
|
||||
output.color = input.color;
|
||||
|
||||
return output;
|
||||
}
|
||||
|
||||
@fragment
|
||||
fn fragment(@location(0) color: vec4f) -> @location(0) vec4f {
|
||||
return color;
|
||||
fn fragment(input: FragmentInput) -> FragmentOutput {
|
||||
var output: FragmentOutput;
|
||||
|
||||
output.color = input.color;
|
||||
|
||||
return output;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user