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255 lines
6.2 KiB
HTML
255 lines
6.2 KiB
HTML
<!-- 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 - Fundamentals</title>
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<link href="resources/threejs-tutorials.css" rel="stylesheet" />
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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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canvas {
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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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<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( { antialias: true, canvas } );
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const scene = new THREE.Scene();
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const aspect = 2; // the canvas default
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const fov = 35;
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const near = 0.1;
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const far = 5000;
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const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
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camera.position.set( - 580, 55, 390 );
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const maxFovX = 40;
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const numBirds = 40;
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const minMax = 700;
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const birdSpeed = 100;
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const useFog = true;
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const useOrbitCamera = true;
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const showHelpers = false;
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if ( useOrbitCamera ) {
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const controls = new OrbitControls( camera, canvas );
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controls.target.set( 0, 0, 0 );
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controls.update();
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}
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renderer.shadowMap.enabled = true;
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const hemiLight = new THREE.HemisphereLight( 0xffffff, 0xffffff, 2 );
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hemiLight.color.setHSL( 0.6, 1, 0.5 );
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hemiLight.groundColor.setHSL( 0.095, 1, 0.5 );
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hemiLight.position.set( 0, 50, 0 );
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scene.add( hemiLight );
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if ( showHelpers ) {
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const hemiLightHelper = new THREE.HemisphereLightHelper( hemiLight, 10 );
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scene.add( hemiLightHelper );
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}
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const dirLight = new THREE.DirectionalLight( 0xffffff, 3 );
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dirLight.color.setHSL( 0.1, 1, 0.95 );
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dirLight.position.set( - 300, 220, 245 );
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scene.add( dirLight );
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dirLight.castShadow = true;
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dirLight.shadow.mapSize.width = 2048;
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dirLight.shadow.mapSize.height = 2048;
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const d = 350;
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dirLight.shadow.camera.left = - d;
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dirLight.shadow.camera.right = d;
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dirLight.shadow.camera.top = d;
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dirLight.shadow.camera.bottom = - d;
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dirLight.shadow.camera.near = 100;
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dirLight.shadow.camera.far = 950;
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dirLight.shadow.bias = - 0.005;
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if ( showHelpers ) {
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const dirLightHeper = new THREE.DirectionalLightHelper( dirLight, 10 );
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scene.add( dirLightHeper );
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}
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const birds = [];
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const loader = new GLTFLoader();
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const fogNear = 1350;
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const fogFar = 1500;
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function rand( min, max ) {
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if ( min === undefined ) {
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min = 0;
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max = 1;
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} else if ( max === undefined ) {
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max = min;
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min = 0;
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}
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return min + Math.random() * ( max - min );
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}
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loader.load( 'resources/models/flamingo/Flamingo.glb', ( gltf ) => {
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const orig = gltf.scene.children[ 0 ];
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orig.castShadow = true;
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orig.receiveShadow = true;
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for ( let i = 0; i < numBirds; ++ i ) {
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const u = i / ( numBirds - 1 );
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const mesh = orig.clone();
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mesh.position.set(
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rand( - 150, 150 ),
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( u * 2 - 1 ) * 200,
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( minMax * 2 * i * 1.7 ) % ( minMax * 2 ) - minMax / 2,
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);
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scene.add( mesh );
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mesh.material = mesh.material.clone();
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mesh.material.color.setHSL( rand(), 1, 0.8 );
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const mixer = new THREE.AnimationMixer( mesh );
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mixer.clipAction( gltf.animations[ 0 ] ).setDuration( 1 ).play();
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mixer.update( rand( 10 ) );
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mixer.timeScale = rand( 0.9, 1.1 );
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birds.push( {
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mixer,
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mesh,
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} );
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}
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} );
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window.s = scene;
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if ( useFog ) {
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const vertexShader = `
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varying vec3 vWorldPosition;
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void main() {
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vec4 worldPosition = modelMatrix * vec4( position, 1.0 );
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vWorldPosition = worldPosition.xyz;
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gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
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}
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`;
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const fragmentShader = `
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uniform vec3 topColor;
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uniform vec3 bottomColor;
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uniform float offset;
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uniform float exponent;
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varying vec3 vWorldPosition;
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void main() {
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float h = normalize( vWorldPosition + offset ).y;
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gl_FragColor = vec4( mix( bottomColor, topColor, max( pow( max( h , 0.0), exponent ), 0.0 ) ), 1.0 );
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}
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`;
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const uniforms = {
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topColor: { value: new THREE.Color( 0x88AABB ) },
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bottomColor: { value: new THREE.Color( 0xEFCB7F ) },
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offset: { value: 730 },
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exponent: { value: 0.3 },
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};
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uniforms.topColor.value.copy( hemiLight.color );
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scene.fog = new THREE.Fog( scene.background, fogNear, fogFar );
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scene.fog.color.copy( uniforms.bottomColor.value );
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const skyGeo = new THREE.SphereGeometry( 3000, 32, 15 );
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const skyMat = new THREE.ShaderMaterial( { vertexShader: vertexShader, fragmentShader: fragmentShader, uniforms: uniforms, side: THREE.BackSide } );
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const sky = new THREE.Mesh( skyGeo, skyMat );
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scene.add( sky );
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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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if ( width === canvas.width && height === canvas.height ) {
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return false;
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}
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renderer.setSize( width, height, false );
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return true;
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}
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let then = 0;
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function render( now ) {
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now *= 0.001;
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const deltaTime = now - then;
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then = now;
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if ( resizeRendererToDisplaySize( renderer ) ) {
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const aspect = canvas.clientWidth / canvas.clientHeight;
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const fovX = THREE.MathUtils.radToDeg( 2 * Math.atan( Math.tan( THREE.MathUtils.degToRad( fov ) * 0.5 ) * aspect ) );
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const newFovY = THREE.MathUtils.radToDeg( 2 * Math.atan( Math.tan( THREE.MathUtils.degToRad( maxFovX ) * .5 ) / aspect ) );
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camera.fov = fovX > maxFovX ? newFovY : fov;
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camera.aspect = aspect;
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camera.updateProjectionMatrix();
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}
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for ( const { mesh, mixer } of birds ) {
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mixer.update( deltaTime );
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mesh.position.z = ( mesh.position.z + minMax + mixer.timeScale * birdSpeed * deltaTime ) % ( minMax * 2 ) - minMax;
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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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