48 lines
1.1 KiB
TypeScript
48 lines
1.1 KiB
TypeScript
import { Alea, create_noise_2d } from "@paulaboks/rng";
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import { Dimension } from "./components/dimension.ts";
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export function generate(dimension: Dimension, width: number, height: number, seed = "seed") {
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const height_noise = create_noise_2d(new Alea(seed + "_height"));
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const tree_noise = create_noise_2d(new Alea(seed + "_trees"));
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const scale = 0.05;
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for (let y = 0; y < height; y++) {
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for (let x = 0; x < width; x++) {
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// multi-octave terrain
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const nx = x * scale;
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const ny = y * scale;
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let h = height_noise(nx, ny) * 1 + height_noise(nx * 2, ny * 2) * 0.5 + height_noise(nx * 4, ny * 4) * 0.25;
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h /= 1.75; // normalize
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let id = "bworld:grass";
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if (h < -0.25) {
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id = "bworld:water";
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} else if (h < -0.15) {
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id = "bworld:sand";
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} else {
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id = "bworld:grass";
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}
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dimension.tiles.push({ x, y, id });
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// tree placement
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if (id === "bworld:grass") {
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const t = tree_noise(x * 0.12, y * 0.12);
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if (t > 0.65) {
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dimension.tiles.push({
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x,
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y,
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id: "bworld:tree",
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});
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}
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}
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}
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}
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}
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