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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 - Fundamentals</title>
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+ <link type="text/css" 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 src="resources/threejs/r102/three.min.js"></script>
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+<script src="resources/threejs/r102/js/controls/OrbitControls.js"></script>
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+<script src="resources/threejs/r102/js/shaders/SSAOShader.js"></script>
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+<script src="resources/threejs/r102/js/shaders/CopyShader.js"></script>
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+<script src="resources/threejs/r102/js/postprocessing/EffectComposer.js"></script>
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+<script src="resources/threejs/r102/js/postprocessing/RenderPass.js"></script>
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+<script src="resources/threejs/r102/js/postprocessing/ShaderPass.js"></script>
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+<script src="resources/threejs/r102/js/postprocessing/MaskPass.js"></script>
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+<script src="resources/threejs/r102/js/postprocessing/SSAOPass.js"></script>
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+<script src="resources/threejs/r102/js/loaders/GLTFLoader.js"></script>
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+<script>
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+'use strict';
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+
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+/* global THREE */
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+
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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: canvas});
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+ const scene = new THREE.Scene();
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+
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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.x = -0.;
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+ camera.position.y = 350;
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+ camera.position.z = 40.;
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+
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+ const useFog = true;
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+ const useOrbitCamera = false;
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+ const showHelpers = false;
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+ const camSpeed = 0.2;
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+
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+ if (useOrbitCamera) {
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+ const controls = new THREE.OrbitControls(camera);
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+ controls.target.set(0, 100.01, 0.2);
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+ controls.update();
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+ }
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+
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+ renderer.gammaInput = true;
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+ renderer.gammaOutput = true;
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+ renderer.shadowMap.enabled = true;
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+
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+ const hemiLight = new THREE.HemisphereLight(0xffffff, 0xffffff, 0.6);
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+ hemiLight.color.setHSL(0.6, 1, 0.6);
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+ hemiLight.groundColor.setHSL(0.095, 1, 0.75);
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+ hemiLight.position.set(0, 50, 0);
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+ scene.add(hemiLight);
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+
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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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+
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+ const dirLight = new THREE.DirectionalLight(0xffffff, 1);
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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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+
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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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+
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+ const loader = new THREE.GLTFLoader();
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+ const camRadius = 600;
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+ const camHeight = 160;
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+ const camTarget = [0, 30, 0];
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+ const fogNear = 1350;
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+ const fogFar = 1500;
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+ loader.load('resources/models/mountain_landscape/scene.gltf', (gltf) => {
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+ gltf.scene.traverse((child) => {
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+ if ( child.isMesh ) {
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+ child.castShadow = true;
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+ child.receiveShadow = true;
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+ }
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+ });
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+ scene.add(gltf.scene);
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+ });
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+
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+ window.s = scene;
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+
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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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+
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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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+
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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.SphereBufferGeometry(4000, 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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+
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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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+
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+ renderer.setSize(width, height, false);
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+ return true;
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+ }
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+
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+ function render(time) {
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+ time *= 0.001;
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+ time += 80;
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+
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+ if (resizeRendererToDisplaySize(renderer)) {
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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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+ if (!useOrbitCamera) {
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+ const angle = Math.sin(time * camSpeed) + Math.PI * .75;
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+ camera.position.set(Math.cos(angle) * camRadius, camHeight, Math.sin(angle) * camRadius);
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+ camera.lookAt(...camTarget);
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+ }
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+
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+ renderer.render(scene, camera);
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+
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+ requestAnimationFrame(render);
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+ }
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+
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+ requestAnimationFrame(render);
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+}
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+
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+main();
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+</script>
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+</html>
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+
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Gregg Tavares