robert/another-boids-in-rust
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First draft of page structure, basic styling

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I'll revise the text at some point, and the styling is *extremely*
basic, but it's a start.
This commit is contained in:
Robert Garrett
2025-10-29 16:33:11 -05:00
parent 71c095088c
commit 615bf79f30
1 changed files with 90 additions and 1 deletions
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91
www/index.html
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@@ -1,8 +1,97 @@
<!doctype html>
<html lang="en">
<head>
<style>
h1 {
text-align: center;
}
canvas {
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
}
main {
margin-left: auto;
margin-right: auto;
width: 70%;
}
table {
border-collapse: collapse;
}
th, td {
border: 1px solid;
padding: 2px 4px;
}
</style>
</head>
<body style="margin: 0px;">
<h1>
Another Boids in Rust
</h1>
<canvas id="boids-canvas" width="1280" height="720"></canvas>
<main>
<article>
<h2>Description</h2>
<p>
This is my implementation of the Boids flocking algorithm. It is written in Rust, built on the Bevy game engine, and compiled to WASM to run in the browser.
</p>
<p>
The algorithm consists of just 3 rules:
<ul>
<li><strong>Separation</strong> - Boids steer apart to avoid colliding.</li>
<li><strong>Alignment</strong> - Boids fly in the same direction as their neighbors.</li>
<li><strong>Cohesion</strong> - Boids clump together so as not to fly off alone.</li>
</ul>
From these rules, the flocking behavior emerges naturally.
</p>
<p>
My version of this program has some extra rules governing speed. In short: things below some threshold are sped
up, and things above are slowed down. This is to keep an appropriate amount of kinetic energy in the system.
Since the boids start in a circle with the same speed, the sum of all velocity vectors is <code>vec2(0, 0)</code>.
Technically, floating-point rounding errors would likely mean the system always has some energy, but never
enough for an interesting simulation.
</p>
</article>
<article>
<h3>Controls</h3>
<table>
<thead>
<tr>
<th scope="col">Input</th>
<th scope="col">Effect</th>
</tr>
</thead>
<tr>
<td>Mouse</td>
<td>The scanner circle is attached to the mouse cursor. Move it to scan boids within the radius.</td>
</tr>
<tr>
<td>Left mouse button</td>
<td>Put scanner into center-of-mass mode</td>
</tr>
<tr>
<td>Right mouse button</td>
<td>Put scanner into average velocity mode. (There's a window focus bug. This button doesn't work quite right!)</td>
</tr>
</table>
</article>
<article>
<h3>Misc</h3>
<table>
<tr>
<td>Source code</td>
<td><a href=https://github.com/DerVerrater/another-boids-in-rust>https://github.com/DerVerrater/another-boids-in-rust</a></td>
</tr>
<tr>
<td>Program Version</td>
<!-- This version text is completely unchecked. I'll need to do something about that. -->
<td><code>v0.3.0 (+patches)</code></td>
</tr>
</table>
</article>
</main>
<script type="module">
import init from './boids.js'