flo-bit.dev
[READ-ONLY] Mirror of https://github.com/flo-bit/tiny-planets. procedurally generated tiny planets in the browsers
flo-bit.dev/tiny-planets/
low-poly
planets
procedural-generation
threejs
add plane version
author
Florian
date
(Oct 6, 2024, 5:39 PM +0200)
commit
555180d1
555180d1b579186b39954d04eae561182dc331e0
parent
2800468d
2800468d1fbe0cd543a07bcc6fe9a7fdaa2520db
+157
-61
+7
-1
src/script.ts
+7
-1
src/script.ts
···
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let total = 0;
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let lastDelta = 0;
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+
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let rotate = true;
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renderer.setAnimationLoop((delta) => {
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renderer.render(scene, camera);
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planetMesh.rotation.y += 0.001;
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if (rotate) planetMesh.rotation.y += 0.001;
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if (lastDelta > 0) {
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total += delta - lastDelta;
···
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createPlanet("forest");
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} else if (event.key === "3") {
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createPlanet("snowForest");
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}
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if (event.key === " ") {
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rotate = !rotate;
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}
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});
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+1
-2
src/worlds/biome.ts
+1
-2
src/worlds/biome.ts
···
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import { UberNoise, type NoiseOptions } from "uber-noise";
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import { Color, ColorRepresentation, Vector3 } from "three";
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import { Color, type ColorRepresentation, Vector3 } from "three";
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import {
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ColorGradient,
···
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} from "./helper/colorgradient";
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import { biomePresets } from "./presets";
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import { Octree } from "./helper/octree";
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import { type VertexInfo } from "./types";
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export type VegetationItem = {
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name: string;
+6
-4
src/worlds/materials/OceanCausticsMaterial.ts
+6
-4
src/worlds/materials/OceanCausticsMaterial.ts
···
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import { noise } from "./noise";
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export class PlanetMaterialWithCaustics extends MeshStandardMaterial {
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constructor(parameters: MeshStandardMaterialParameters) {
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constructor(
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parameters: MeshStandardMaterialParameters & { shape: "sphere" | "plane" },
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) {
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super(parameters);
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this.onBeforeCompile = (shader) => {
···
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"#include <color_fragment>",
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`#include <color_fragment>
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vec3 pos = vPos * 3.0;
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float len = length(vPos);
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${parameters.shape == "plane" ? "float len = vPos.y;" : "float len = length(vPos) - 1.0;"}
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// Fade in
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float fadeIn = smoothstep(0.96, 0.985, len);
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float fadeIn = smoothstep(-0.04, -0.015, len);
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// Fade out
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float fadeOut = 1.0 - smoothstep(0.994, 0.999, len);
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float fadeOut = 1.0 - smoothstep(-0.006, -0.001, len);
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float causticIntensity = fadeIn * fadeOut * 0.7;
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diffuseColor.rgb = mix(diffuseColor.rgb, vec3(1.0), causticIntensity * smoothstep(0.0, 1.0, caustics(vec4(pos, time * 0.05))));
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`,
+20
-7
src/worlds/planet.ts
+20
-7
src/worlds/planet.ts
···
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material?: "normal" | "caustics";
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biome?: BiomeOptions;
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shape?: "sphere" | "plane";
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};
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export class Planet {
···
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vegetationPositions?: Record<string, Vector3[]>;
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shape: "sphere" | "plane" = "sphere";
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tempQuaternion = new Quaternion();
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constructor(options: PlanetOptions = {}) {
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this.shape = options.shape ?? this.shape;
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options.shape = this.shape;
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this.options = options;
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this.biome = new Biome(options.biome);
···
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const material =
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this.options.material === "caustics"
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? new PlanetMaterialWithCaustics(materialOptions)
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? new PlanetMaterialWithCaustics({
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...materialOptions,
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shape: this.shape,
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})
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: new MeshStandardMaterial(materialOptions);
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const planetMesh = new Mesh(geometry, material);
···
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updatePosition(item: Object3D, pos: Vector3) {
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item.position.copy(pos);
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const currentRotation = new Quaternion();
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const a = item.up.clone().normalize();
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const b = pos.clone().normalize();
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if (this.shape === "sphere") {
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const a = item.up.clone().normalize();
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const b = pos.clone().normalize();
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currentRotation.setFromUnitVectors(a, b);
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this.tempQuaternion.setFromUnitVectors(a, b);
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item.quaternion.copy(currentRotation);
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item.quaternion.copy(this.tempQuaternion);
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item.up = b;
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item.up = b;
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}
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}
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}
+1
-1
src/worlds/presets.ts
+1
-1
src/worlds/presets.ts
+122
-46
src/worlds/worker.ts
+122
-46
src/worlds/worker.ts
···
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BufferAttribute,
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Float32BufferAttribute,
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Color,
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PlaneGeometry,
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BufferGeometry,
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} from "three";
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import { Biome, type VegetationItem } from "./biome";
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import { Biome } from "./biome";
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import { type PlanetOptions } from "./planet";
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import UberNoise from "uber-noise";
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import { type VertexInfo } from "./types";
···
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function createGeometry(
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planetOptions: PlanetOptions,
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): [IcosahedronGeometry, IcosahedronGeometry, Record<string, Vector3[]>] {
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const sphere = new IcosahedronGeometry(1, planetOptions.detail ?? 50);
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const oceanSphere = new IcosahedronGeometry(1, planetOptions.detail ?? 50);
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): [BufferGeometry, BufferGeometry, Record<string, Vector3[]>] {
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const detail = planetOptions.detail ?? 50;
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const mainGeometry =
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planetOptions.shape == "plane"
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? new PlaneGeometry(3, 3, detail, detail).toNonIndexed()
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: new IcosahedronGeometry(1, detail);
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const oceanGeometry =
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planetOptions.shape == "plane"
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? new PlaneGeometry(3, 3, detail, detail).toNonIndexed()
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: new IcosahedronGeometry(1, detail);
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const biome = new Biome(planetOptions.biome);
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const vertices = sphere.getAttribute("position");
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const oceanVertices = oceanSphere.getAttribute("position");
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const vertices = mainGeometry.getAttribute("position");
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const oceanVertices = oceanGeometry.getAttribute("position");
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const faceCount = vertices.count / 3;
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const faceSize = (Math.PI * 4) / faceCount;
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console.log("faces:", faceCount);
···
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const colors = new Float32Array(vertices.count * 3);
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const oceanColors = new Float32Array(oceanVertices.count * 3);
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const normals = sphere.getAttribute("normal");
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const oceanNormals = oceanSphere.getAttribute("normal");
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const normals = mainGeometry.getAttribute("normal");
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const oceanNormals = oceanGeometry.getAttribute("normal");
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const planeUp = new Vector3(0, 1, 0);
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const a = new Vector3(),
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b = new Vector3(),
···
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seed: 0,
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});
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oceanSphere.morphAttributes.position = [];
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oceanSphere.morphAttributes.normal = [];
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oceanGeometry.morphAttributes.position = [];
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oceanGeometry.morphAttributes.normal = [];
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const oceanMorphPositions: number[] = [];
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const oceanMorphNormals: number[] = [];
···
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oceanB.fromBufferAttribute(oceanVertices, i + 1);
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oceanC.fromBufferAttribute(oceanVertices, i + 2);
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if (planetOptions.shape == "plane") {
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// switch y and z
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let temp = a.y;
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a.y = a.z;
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a.z = temp;
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temp = b.y;
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b.y = b.z;
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b.z = temp;
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temp = c.y;
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c.y = c.z;
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c.z = temp;
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temp = oceanA.y;
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oceanA.y = oceanA.z;
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oceanA.z = temp;
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temp = oceanB.y;
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oceanB.y = oceanB.z;
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oceanB.z = temp;
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temp = oceanC.y;
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oceanC.y = oceanC.z;
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oceanC.z = temp;
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// switch a and c
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let tempVector = a.clone();
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a.copy(c);
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c.copy(tempVector);
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tempVector = oceanA.clone();
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oceanA.copy(oceanC);
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oceanC.copy(tempVector);
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}
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mid.set(0, 0, 0);
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mid.addVectors(a, b).add(c).divideScalar(3);
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···
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// if not, calculate it
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if (!move) {
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// calculate height and scatter
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const height = biome.getHeight(v) + 1;
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const height = biome.getHeight(v);
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const scatterX = scatterNoise.get(v);
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const scatterY = scatterNoise.get(
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v.y + scatterScale * 100,
···
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v.y - scatterScale * 200,
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);
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// calculate sea height and sea morph height
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const seaHeight = biome.getSeaHeight(v) + 1;
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const secondSeaHeight = biome.getSeaHeight(v.addScalar(100)) + 1;
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const seaHeight = biome.getSeaHeight(v);
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const secondSeaHeight = biome.getSeaHeight(v.addScalar(100));
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v.subScalar(100);
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···
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calculatedVerticesArray[i + j] = move;
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// we add height here so we can calculate the average normalized height of the face later
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normalizedHeight += move.height - 1;
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normalizedHeight += move.height;
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// move vertex based on height and scatter
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v.add(move.scatter).normalize().multiplyScalar(move.height);
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v.add(move.scatter);
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if (planetOptions.shape == "plane") {
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v.y = move.height;
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} else {
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v.normalize().multiplyScalar(move.height + 1);
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}
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vertices.setXYZ(i + j, v.x, v.y, v.z);
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// move ocean vertex based on sea height and scatter
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// move ocean morph vertex based on sea morph height and scatter
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let oceanV = oceanA;
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if (j === 1) oceanV = oceanB;
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if (j === 2) oceanV = oceanC;
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oceanV.add(move.scatter).normalize().multiplyScalar(move.seaMorph);
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oceanV.add(move.scatter);
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+
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if (planetOptions.shape == "plane") {
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oceanV.y = move.seaMorph;
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} else {
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oceanV.normalize().multiplyScalar(move.seaMorph + 1);
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+
}
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oceanMorphPositions.push(oceanV.x, oceanV.y, oceanV.z);
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// move ocean morph vertex based on sea height and scatter
267
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// move ocean vertex based on sea height and scatter
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if (j === 0) {
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oceanD.copy(oceanV);
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oceanV = oceanD;
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} else if (j === 1) {
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oceanE.copy(oceanV);
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oceanV = oceanE;
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} else if (j === 2) {
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oceanF.copy(oceanV);
276
+
oceanV = oceanF;
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277
}
215
-
oceanV.normalize().multiplyScalar(move.seaHeight);
278
+
if (planetOptions.shape == "plane") {
279
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oceanV.y = move.seaHeight;
280
+
} else {
281
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oceanV.normalize().multiplyScalar(move.seaHeight + 1);
282
+
}
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oceanVertices.setXYZ(i + j, oceanV.x, oceanV.y, oceanV.z);
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}
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285
···
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300
234
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// calculate steepness (acos of dot product of normal and up vector)
235
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// (up vector = old mid point on sphere)
236
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const steepness = Math.acos(Math.abs(temp.dot(mid)));
303
+
const steepness = Math.acos(
304
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Math.abs(temp.dot(planetOptions.shape == "plane" ? planeUp : mid)),
305
+
);
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// steepness is between 0 and PI/2
238
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// this will be used for color calculation and vegetation placement
239
308
···
330
399
if (!placedVegetation[vegetation.name]) {
331
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placedVegetation[vegetation.name] = [];
332
401
}
333
-
let height = a.length();
334
-
placedVegetation[vegetation.name].push(
335
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a
336
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.clone()
337
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.normalize()
338
-
.multiplyScalar(height + 0.005),
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-
);
402
+
403
+
placedVegetation[vegetation.name].push(a.clone());
340
404
341
-
biome.addVegetation(
342
-
vegetation,
343
-
a.normalize(),
344
-
normalizedHeight,
345
-
steepness,
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-
);
405
+
if (planetOptions.shape == "plane") {
406
+
a.y = 0;
407
+
} else {
408
+
a.normalize();
409
+
}
410
+
411
+
biome.addVegetation(vegetation, a, normalizedHeight, steepness);
347
412
break;
348
413
}
349
414
}
350
415
}
351
416
352
-
const maxDist = 0.14;
353
-
354
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const color = new Color();
355
418
356
419
// go through all vertices again and update height and color based on vegetation
357
420
for (let i = 0; i < vertices.count; i += 3) {
358
421
a.fromBufferAttribute(vertices, i);
359
-
a.normalize();
360
422
b.fromBufferAttribute(vertices, i + 1);
361
-
b.normalize();
362
423
c.fromBufferAttribute(vertices, i + 2);
363
-
c.normalize();
424
+
425
+
if (planetOptions.shape == "plane") {
426
+
a.y = 0;
427
+
b.y = 0;
428
+
c.y = 0;
429
+
} else {
430
+
a.normalize();
431
+
b.normalize();
432
+
c.normalize();
433
+
}
364
434
365
435
color.setRGB(colors[i * 3], colors[i * 3 + 1], colors[i * 3 + 2]);
366
436
···
377
447
const moveDataC = calculatedVerticesArray[i + 2];
378
448
379
449
// update height based on vegetation
380
-
a.normalize().multiplyScalar(moveDataA.height + output.heightA);
381
-
b.normalize().multiplyScalar(moveDataB.height + output.heightB);
382
-
c.normalize().multiplyScalar(moveDataC.height + output.heightC);
450
+
if (planetOptions.shape == "plane") {
451
+
a.y = moveDataA.height + output.heightA;
452
+
b.y = moveDataB.height + output.heightB;
453
+
c.y = moveDataC.height + output.heightC;
454
+
} else {
455
+
a.normalize().multiplyScalar(moveDataA.height + output.heightA + 1);
456
+
b.normalize().multiplyScalar(moveDataB.height + output.heightB + 1);
457
+
c.normalize().multiplyScalar(moveDataC.height + output.heightC + 1);
458
+
}
383
459
384
460
vertices.setXYZ(i, a.x, a.y, a.z);
385
461
vertices.setXYZ(i + 1, b.x, b.y, b.z);
···
399
475
colors[i * 3 + 8] = output.color.b;
400
476
}
401
477
402
-
oceanSphere.morphAttributes.position[0] = new Float32BufferAttribute(
478
+
oceanGeometry.morphAttributes.position[0] = new Float32BufferAttribute(
403
479
oceanMorphPositions,
404
480
3,
405
481
);
406
-
oceanSphere.morphAttributes.normal[0] = new Float32BufferAttribute(
482
+
oceanGeometry.morphAttributes.normal[0] = new Float32BufferAttribute(
407
483
oceanMorphNormals,
408
484
3,
409
485
);
410
486
411
-
sphere.setAttribute("color", new BufferAttribute(colors, 3));
412
-
oceanSphere.setAttribute("color", new BufferAttribute(oceanColors, 3));
487
+
mainGeometry.setAttribute("color", new BufferAttribute(colors, 3));
488
+
oceanGeometry.setAttribute("color", new BufferAttribute(oceanColors, 3));
413
489
414
-
return [sphere, oceanSphere, placedVegetation];
490
+
return [mainGeometry, oceanGeometry, placedVegetation];
415
491
}