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280 lines
8.5 KiB
280 lines
8.5 KiB
3 years ago
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<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>Three.js - Load .GLTF - Animated Cars</title>
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<style>
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html, body {
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margin: 0;
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height: 100%;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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</body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../../build/three.module.js",
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"three/addons/": "../../examples/jsm/"
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}
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}
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</script>
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<script type="module">
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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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import {GLTFLoader} from 'three/addons/loaders/GLTFLoader.js';
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function main() {
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const canvas = document.querySelector('#c');
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const renderer = new THREE.WebGLRenderer({canvas});
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renderer.outputEncoding = THREE.sRGBEncoding;
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const fov = 45;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 100;
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const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
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camera.position.set(0, 10, 20);
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const controls = new OrbitControls(camera, canvas);
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controls.target.set(0, 5, 0);
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controls.update();
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const scene = new THREE.Scene();
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scene.background = new THREE.Color('black');
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{
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const planeSize = 40;
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const loader = new THREE.TextureLoader();
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const texture = loader.load('resources/images/checker.png');
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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texture.magFilter = THREE.NearestFilter;
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const repeats = planeSize / 2;
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texture.repeat.set(repeats, repeats);
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const planeGeo = new THREE.PlaneGeometry(planeSize, planeSize);
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const planeMat = new THREE.MeshPhongMaterial({
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map: texture,
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side: THREE.DoubleSide,
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});
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const mesh = new THREE.Mesh(planeGeo, planeMat);
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mesh.rotation.x = Math.PI * -.5;
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scene.add(mesh);
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}
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{
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const skyColor = 0xB1E1FF; // light blue
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const groundColor = 0xB97A20; // brownish orange
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const intensity = 0.6;
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const light = new THREE.HemisphereLight(skyColor, groundColor, intensity);
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scene.add(light);
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}
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{
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const color = 0xFFFFFF;
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const intensity = 0.8;
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const light = new THREE.DirectionalLight(color, intensity);
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light.position.set(5, 10, 2);
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scene.add(light);
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scene.add(light.target);
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}
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function frameArea(sizeToFitOnScreen, boxSize, boxCenter, camera) {
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const halfSizeToFitOnScreen = sizeToFitOnScreen * 0.5;
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const halfFovY = THREE.MathUtils.degToRad(camera.fov * .5);
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const distance = halfSizeToFitOnScreen / Math.tan(halfFovY);
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// compute a unit vector that points in the direction the camera is now
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// in the xz plane from the center of the box
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const direction = (new THREE.Vector3())
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.subVectors(camera.position, boxCenter)
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.multiply(new THREE.Vector3(1, 0, 1))
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.normalize();
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// move the camera to a position distance units way from the center
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// in whatever direction the camera was from the center already
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camera.position.copy(direction.multiplyScalar(distance).add(boxCenter));
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// pick some near and far values for the frustum that
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// will contain the box.
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camera.near = boxSize / 100;
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camera.far = boxSize * 100;
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camera.updateProjectionMatrix();
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// point the camera to look at the center of the box
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camera.lookAt(boxCenter.x, boxCenter.y, boxCenter.z);
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}
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let curve;
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let curveObject;
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{
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const controlPoints = [
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[1.118281, 5.115846, -3.681386],
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[3.948875, 5.115846, -3.641834],
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[3.960072, 5.115846, -0.240352],
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[3.985447, 5.115846, 4.585005],
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[-3.793631, 5.115846, 4.585006],
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[-3.826839, 5.115846, -14.736200],
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[-14.542292, 5.115846, -14.765865],
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[-14.520929, 5.115846, -3.627002],
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[-5.452815, 5.115846, -3.634418],
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[-5.467251, 5.115846, 4.549161],
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[-13.266233, 5.115846, 4.567083],
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[-13.250067, 5.115846, -13.499271],
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[4.081842, 5.115846, -13.435463],
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[4.125436, 5.115846, -5.334928],
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[-14.521364, 5.115846, -5.239871],
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[-14.510466, 5.115846, 5.486727],
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[5.745666, 5.115846, 5.510492],
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[5.787942, 5.115846, -14.728308],
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[-5.423720, 5.115846, -14.761919],
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[-5.373599, 5.115846, -3.704133],
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[1.004861, 5.115846, -3.641834],
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];
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const p0 = new THREE.Vector3();
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const p1 = new THREE.Vector3();
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curve = new THREE.CatmullRomCurve3(
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controlPoints.map((p, ndx) => {
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p0.set(...p);
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p1.set(...controlPoints[(ndx + 1) % controlPoints.length]);
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return [
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(new THREE.Vector3()).copy(p0),
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(new THREE.Vector3()).lerpVectors(p0, p1, 0.1),
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(new THREE.Vector3()).lerpVectors(p0, p1, 0.9),
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];
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}).flat(),
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true,
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);
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{
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const points = curve.getPoints(250);
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const geometry = new THREE.BufferGeometry().setFromPoints(points);
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const material = new THREE.LineBasicMaterial({color: 0xff0000});
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curveObject = new THREE.Line(geometry, material);
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curveObject.scale.set(100, 100, 100);
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curveObject.position.y = -621;
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curveObject.visible = false;
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material.depthTest = false;
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curveObject.renderOrder = 1;
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scene.add(curveObject);
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}
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}
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const cars = [];
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{
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const gltfLoader = new GLTFLoader();
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gltfLoader.load('resources/models/cartoon_lowpoly_small_city_free_pack/scene.gltf', (gltf) => {
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const root = gltf.scene;
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scene.add(root);
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const loadedCars = root.getObjectByName('Cars');
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const fixes = [
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{ prefix: 'Car_08', y: 0, rot: [Math.PI * .5, 0, Math.PI * .5], },
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{ prefix: 'CAR_03', y: 33, rot: [0, Math.PI, 0], },
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{ prefix: 'Car_04', y: 40, rot: [0, Math.PI, 0], },
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];
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root.updateMatrixWorld();
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for (const car of loadedCars.children.slice()) {
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const fix = fixes.find(fix => car.name.startsWith(fix.prefix));
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const obj = new THREE.Object3D();
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car.position.set(0, fix.y, 0);
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car.rotation.set(...fix.rot);
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obj.add(car);
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scene.add(obj);
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cars.push(obj);
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}
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// compute the box that contains all the stuff
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// from root and below
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const box = new THREE.Box3().setFromObject(root);
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const boxSize = box.getSize(new THREE.Vector3()).length();
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const boxCenter = box.getCenter(new THREE.Vector3());
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// set the camera to frame the box
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frameArea(boxSize * 0.5, boxSize, boxCenter, camera);
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// update the Trackball controls to handle the new size
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controls.maxDistance = boxSize * 10;
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controls.target.copy(boxCenter);
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controls.update();
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});
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}
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function resizeRendererToDisplaySize(renderer) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const needResize = canvas.width !== width || canvas.height !== height;
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if (needResize) {
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renderer.setSize(width, height, false);
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}
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return needResize;
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}
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// create 2 Vector3s we can use for path calculations
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const carPosition = new THREE.Vector3();
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const carTarget = new THREE.Vector3();
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function render(time) {
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time *= 0.001; // convert to seconds
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if (resizeRendererToDisplaySize(renderer)) {
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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{
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const pathTime = time * .01;
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const targetOffset = 0.01;
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cars.forEach((car, ndx) => {
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// a number between 0 and 1 to evenly space the cars
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const u = pathTime + ndx / cars.length;
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// get the first point
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curve.getPointAt(u % 1, carPosition);
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carPosition.applyMatrix4(curveObject.matrixWorld);
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// get a second point slightly further down the curve
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curve.getPointAt((u + targetOffset) % 1, carTarget);
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carTarget.applyMatrix4(curveObject.matrixWorld);
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// put the car at the first point (temporarily)
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car.position.copy(carPosition);
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// point the car the second point
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car.lookAt(carTarget);
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// put the car between the 2 points
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car.position.lerpVectors(carPosition, carTarget, 0.5);
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});
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}
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renderer.render(scene, camera);
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requestAnimationFrame(render);
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}
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requestAnimationFrame(render);
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}
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main();
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</script>
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</html>
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