109 lines
3.2 KiB
JavaScript
109 lines
3.2 KiB
JavaScript
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import * as THREE from 'three';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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/**
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* Creates and returns the core Three.js scene objects: renderer, scene, camera, controls.
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* Tweak the defaults below or pass overrides to customize.
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*/
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const DEFAULTS = {
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// Renderer
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antialias: true,
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alpha: true, // transparent background (for OBS chroma key, etc.)
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shadowMap: true,
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// Camera
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fov: 30,
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near: 0.1,
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far: 50,
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cameraPosition: [0, 1, 0.9],
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controlsTarget: [0, 1.1, 0],
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// Scene
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background: null, // null = transparent, or set to a THREE.Color
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// Lighting
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lights: [
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{ type: 'directional', color: 0xffffff, intensity: 1, position: [3, 15, -5] },
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{ type: 'ambient', color: 0xffffff, intensity: 2.1 },
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],
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// Debug helpers (set to true to enable)
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gridHelper: false,
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axesHelper: false,
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};
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export function createScene(overrides = {}) {
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const opts = { ...DEFAULTS, ...overrides };
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// --- Renderer ---
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const renderer = new THREE.WebGLRenderer({
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antialias: opts.antialias,
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alpha: opts.alpha,
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});
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renderer.setSize(window.innerWidth, window.innerHeight);
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renderer.setPixelRatio(window.devicePixelRatio);
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if (opts.shadowMap) {
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renderer.shadowMap.enabled = true;
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renderer.shadowMap.type = THREE.PCFSoftShadowMap;
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}
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document.body.appendChild(renderer.domElement);
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// --- Scene ---
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const scene = new THREE.Scene();
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if (opts.background !== null) {
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scene.background = opts.background instanceof THREE.Color
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? opts.background
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: new THREE.Color(opts.background);
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}
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// --- Camera ---
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const camera = new THREE.PerspectiveCamera(
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opts.fov,
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window.innerWidth / window.innerHeight,
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opts.near,
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opts.far,
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);
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camera.position.set(...opts.cameraPosition);
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// --- Controls ---
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const controls = new OrbitControls(camera, renderer.domElement);
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controls.target.set(...opts.controlsTarget);
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controls.update();
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// --- Lighting ---
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for (const lightDef of opts.lights) {
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let light;
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if (lightDef.type === 'directional') {
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light = new THREE.DirectionalLight(lightDef.color, lightDef.intensity);
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if (lightDef.position) light.position.set(...lightDef.position);
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if (lightDef.castShadow) light.castShadow = true;
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} else if (lightDef.type === 'ambient') {
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light = new THREE.AmbientLight(lightDef.color, lightDef.intensity);
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} else if (lightDef.type === 'point') {
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light = new THREE.PointLight(lightDef.color, lightDef.intensity);
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if (lightDef.position) light.position.set(...lightDef.position);
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}
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if (light) scene.add(light);
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}
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// --- Debug helpers ---
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if (opts.gridHelper) {
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const size = typeof opts.gridHelper === 'number' ? opts.gridHelper : 50;
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scene.add(new THREE.GridHelper(size, size));
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}
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if (opts.axesHelper) {
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const size = typeof opts.axesHelper === 'number' ? opts.axesHelper : 5;
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scene.add(new THREE.AxesHelper(size));
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}
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// --- Resize handler ---
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window.addEventListener('resize', () => {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize(window.innerWidth, window.innerHeight);
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});
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return { renderer, scene, camera, controls };
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}
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