dyna3/engine-proto/ganja-test/ganja-test.html

63 lines
1.4 KiB
HTML
Raw Normal View History

<!DOCTYPE html>
<html>
<head>
<style>
body {
background-color: #ffe0f0;
}
/* needed to keep Ganja canvas from blowing up */
canvas {
min-width: 600px;
max-width: 600px;
min-height: 600px;
max-height: 600px;
}
</style>
<script src="https://unpkg.com/ganja.js"></script>
</head>
<body>
<p><button onclick="flipPoint()">Flip point</button></p>
<script>
// in the default view, e4 + e5 is the point at infinity
let CGA3 = Algebra(4, 1);
let v = [
CGA3.inline(() => 1e1 + 1e5)(),
CGA3.inline(() => 1e2 + 1e5)(),
CGA3.inline(() => 1e3 + 1e5)()
];
let w = [
CGA3.inline(() => 1e1 - Math.sqrt(0.2)*1e4 + Math.sqrt(1.2)*1e5)(),
CGA3.inline(() => 1e2 - Math.sqrt(0.2)*1e4 + Math.sqrt(1.2)*1e5)(),
CGA3.inline(() => 1e3 - Math.sqrt(0.2)*1e4 + Math.sqrt(1.2)*1e5)()
];
let s = CGA3.inline(() => -Math.sqrt(1.2)*1e4 + Math.sqrt(0.2)*1e5);
// create scene function
let scene = () => [
0xff00b0, v[0],
0x00ffb0, v[1],
0x00b0ff, v[2],
0x800040, w[0],
0x008040, w[1],
0x004080, w[2],
0xd0e0f0, s
];
// initialize graph
let gr = CGA3.graph(
scene,
{
conformal: true, gl: true, grid: true
}
)
document.body.appendChild(gr);
function flipPoint() {
v[0] = CGA3.Dual(CGA3.Mul(s, v[0]));
requestAnimationFrame(gr.update.bind(gr, scene));
}
</script>
</body>
</html>