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README.md Normal file
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Visualization of Minetest biome points.
Voronoi implementation pulled from <https://github.com/gorhill/Javascript-Voronoi> (MIT License).

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minetest_biome_voronoi.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Minetest Biome Point Visualizer</title>
<style>
canvas {
border: 1px solid black;
}
</style>
<script src="./rhill-voronoi-core.js"></script>
</head>
<body>
<h1>Minetest Biome Point Visualizer</h1>
<!-- TODO: Add proper fallback by listing the voronoi points -->
<canvas id="voronoiCanvas" width="900" height="900">
A voronoi diagram is supposed to be here but for some reason it cannot be displayed.
</canvas>
<script>
"use strict";
let biomePoints = [
{ heat: 0, humidity: 0 },
{ heat: 50, humidity: 25 },
{ heat: -3, humidity: -59 },
{ heat: -100, humidity: -100 },
{ heat: 100, humidity: 100 },
{ heat: 100, humidity: 5 },
];
biomePoints = [];
for (let i=0; i<10; i++) {
biomePoints.push({
heat: Math.random()*200-100,
humidity: Math.random()*200-100,
});
}
function biomePointToVoronoiPoint(point) {
let newPoint = { x: point.heat, y: point.humidity }
return newPoint;
}
function voronoiPointToBiomePoint(point) {
let newPoint = { heat: point.x, humidity: point.y }
return newPoint;
}
function putPoint(context, point) {
context.moveTo(0, 0);
context.arc(point.heat, point.humidity, 2, 0, Math.PI * 2);
context.fill();
};
const LIMIT = 200
const GRID_STEP = 10
function putGrid(context) {
context.lineWidth = 0.5;
context.strokeStyle = "#00000040"
for (let x=-LIMIT; x<=LIMIT; x+=GRID_STEP) {
context.beginPath();
context.moveTo(x, -LIMIT);
context.lineTo(x, LIMIT);
context.stroke();
}
for (let y=-LIMIT; y<=LIMIT; y+=GRID_STEP) {
context.beginPath();
context.moveTo(-LIMIT, y);
context.lineTo(LIMIT, y);
context.stroke();
}
}
function putAxes(context) {
context.lineWidth = 0.75;
// heat axis (horizontal)
context.beginPath();
context.moveTo(-LIMIT,0)
context.lineTo(LIMIT,0)
context.stroke();
// humidity axis ()
context.beginPath();
context.moveTo(0,-LIMIT)
context.lineTo(0,LIMIT)
context.stroke();
}
function draw() {
let canvas = document.getElementById("voronoiCanvas");
// TODO: Check for getContext support of browser
let context = canvas.getContext("2d")
context.translate(voronoiCanvas.width/2, voronoiCanvas.height/2);
context.scale(voronoiCanvas.width/300, voronoiCanvas.height/300);
//putAxes(context);
//putGrid(context);
context.fillStyle = "#ef0000";
for (let p of biomePoints) {
putPoint(context, p)
}
let voronoi = new Voronoi();
let vbbox = {xl: -LIMIT, xr: LIMIT, yt: -LIMIT, yb: LIMIT};
let sites = []
for (let p of biomePoints) {
sites.push(biomePointToVoronoiPoint(p));
}
let diagram = voronoi.compute(sites, vbbox);
context.strokeStyle = "#009f00";
for (let e=0; e<diagram.edges.length; e++) {
let edge = diagram.edges[e];
context.beginPath();
context.moveTo(edge.va.x, edge.va.y);
context.lineTo(edge.vb.x, edge.vb.y);
context.stroke();
}
}
window.addEventListener("load", draw);
</script>
</body>
</html>

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rhill-voronoi-core.js Normal file
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