2024-06-20 17:18:36 -05:00
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<!DOCTYPE html>
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<html>
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<head>
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<title>Physics - Prototyping</title>
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<link rel="stylesheet" href="./main.css">
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<script src="./draw.js"></script>
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</head>
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<body>
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2024-06-21 15:20:13 -05:00
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<div id="d1"></div>
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<p>
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Some body text
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</p>
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<div id="d2"></div>
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<div id="d3"></div>
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<div id="d4"></div>
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<div id="d5"></div>
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2024-06-20 17:18:36 -05:00
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<script>
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2024-06-21 15:20:13 -05:00
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let d1, d2, d3, d4;
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{
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const d = new Drawing('d1');
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d1 = d;
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d.setTitle('Example Animation');
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d.setCaption('Lissajou figure (skewed)');
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d.addButtons();
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d.setStroke('black', 4);
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d.polyline([0, 100], [0, 0], [100, 0]);
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d.definePoint('p1', () => d.oscillatingPoint([25, 50], [100, 100], 5000));
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d.setStroke('red', 2);
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d.line([0, 0], 'p1');
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d.definePoint('p2', () => {
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const [x, y] = d.getPoint('p1');
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return [x, y - d.oscillatingValue(10, 40, 5000 / 3, Math.PI / 2)];
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});
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d.setFill('blue');
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d.square('p2', {trace: {age: 5000}});
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d.setFill('cyan');
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d.circle('p1');
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d.start();
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}
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{
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const d = new Drawing('d2');
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d2 = d;
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d.setTitle('Sine Wave');
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d.setCaption('y = sin(x)');
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d.setStroke('black', 4);
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d.line([0, 0], [2*Math.PI, 0]);
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d.line([0, -1], [0, 1]);
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d.setStroke('red', 2);
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d.setFrame([0, -1], [2*Math.PI, 1]);
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d.setScale(100 / Math.PI);
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d.func({step: 0.1}, (x) => Math.sin(x));
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d.render();
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}
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{
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const d = new Drawing('d3');
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d3 = d;
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d.setTitle('Oscillating Sine Wave');
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d.setCaption('y = sin(x) * sin(t)');
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d.setStroke('black', 4);
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d.line([0, 0], [2*Math.PI, 0]);
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d.line([0, -1], [0, 1]);
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d.setStroke('red', 2);
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d.setFrame([0, -1], [2*Math.PI, 1]);
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d.setScale(100 / Math.PI);
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d.func({step: 0.1}, (x) => Math.sin(x) * d.oscillatingValue(-1, 1, 500));
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d.start();
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}
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{
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const d = new Drawing('d4');
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d4 = d;
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d.setTitle('Travelling Sine Wave');
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d.setCaption('y = sin(x + t)');
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d.setStroke('black', 4);
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d.line([0, 0], [2*Math.PI, 0]);
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d.line([0, -1], [0, 1]);
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d.setStroke('red', 2);
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d.setFrame([0, -1], [2*Math.PI, 1]);
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d.setScale(100 / Math.PI);
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d.func({step: 0.1}, (x) => Math.sin(x + 2*Math.PI*d.t / 1000));
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d.start();
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}
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{
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const d = new Drawing('d5');
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d5 = d;
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d.setTitle('Projectile');
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d.setCaption('y = v0y * t - g * t^2<br>x = v0x * t');
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d.setFrame([0, 0], [300, 100]);
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d.setStroke('black', 4);
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d.polyline([0, 100], [0, 0], [300, 0]);
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const v0 = 80;
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const angle = Math.PI / 4;
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const v0x = v0 * Math.cos(angle);
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const v0y = v0 * Math.sin(angle);
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d.definePoint('p1', () => {
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const t = d.t / 1000;
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const x = v0x * t;
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const y = v0y * t - 9.81 * t**2;
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if (t > 0 && (y <= 0 || x >= d.frame[1][0])) {
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d.stop();
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d.t = 0;
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}
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return [x, y];
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})
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d.setStroke('green', 1);
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d.line([0, 0], [v0x, v0y]);
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d.setFill('blue');
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const projectile = d.circle('p1', {trace: {age: -1}})
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d.onStart(() => {
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if (d.t == 0) {
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projectile.reset();
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}
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})
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d.start();
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}
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2024-06-20 17:18:36 -05:00
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</script>
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2024-06-21 15:20:13 -05:00
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2024-06-20 17:18:36 -05:00
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</body>
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</html>
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