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Examples: Improve refraction demo. #21938

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merged 1 commit into from
Jun 2, 2021
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Examples: Improve refraction demo. #21938

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2 changes: 1 addition & 1 deletion examples/js/shaders/WaterRefractionShader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -62,7 +62,7 @@

void main() {

float waveStrength = 0.1;
float waveStrength = 0.5;
float waveSpeed = 0.03;

// simple distortion (ripple) via dudv map (see https://www.youtube.com/watch?v=6B7IF6GOu7s)
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2 changes: 1 addition & 1 deletion examples/jsm/shaders/WaterRefractionShader.js
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Expand Up @@ -65,7 +65,7 @@ const WaterRefractionShader = {

void main() {

float waveStrength = 0.1;
float waveStrength = 0.5;
float waveSpeed = 0.03;

// simple distortion (ripple) via dudv map (see https://www.youtube.com/watch?v=6B7IF6GOu7s)
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Binary file modified examples/screenshots/webgl_refraction.jpg
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138 changes: 91 additions & 47 deletions examples/webgl_refraction.html
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,14 @@
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
<style>
body {
color: #444;
}
a {
color: #08f;
}
</style>
</head>
<body>

Expand All @@ -21,37 +29,40 @@
import { Refractor } from './jsm/objects/Refractor.js';
import { WaterRefractionShader } from './jsm/shaders/WaterRefractionShader.js';

let scene, camera, clock, renderer, refractor;
let camera, scene, renderer, clock;

let refractor, smallSphere;

init();

function init() {

// scene

scene = new THREE.Scene();

// camera

camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 200 );
camera.position.set( - 10, 0, 15 );
camera.lookAt( scene.position );

// clock
const container = document.getElementById( 'container' );

clock = new THREE.Clock();

// mesh
// renderer
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );

const geometry = new THREE.TorusKnotGeometry( 3, 1, 256, 32 );
const material = new THREE.MeshStandardMaterial( { color: 0x6083c2 } );
// scene
scene = new THREE.Scene();

// camera
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 500 );
camera.position.set( 0, 75, 160 );

const mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
const controls = new OrbitControls( camera, renderer.domElement );
controls.target.set( 0, 40, 0 );
controls.maxDistance = 400;
controls.minDistance = 10;
controls.update();

// refractor

const refractorGeometry = new THREE.PlaneGeometry( 10, 10 );
const refractorGeometry = new THREE.PlaneGeometry( 90, 90 );

refractor = new Refractor( refractorGeometry, {
color: 0x999999,
Expand All @@ -60,7 +71,7 @@
shader: WaterRefractionShader
} );

refractor.position.set( 0, 0, 5 );
refractor.position.set( 0, 50, 0 );

scene.add( refractor );

Expand All @@ -73,32 +84,60 @@
} );

dudvMap.wrapS = dudvMap.wrapT = THREE.RepeatWrapping;
refractor.material.uniforms[ "tDudv" ].value = dudvMap;

// light

const ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
scene.add( ambientLight );

const pointLight = new THREE.PointLight( 0xffffff, 0.8 );
camera.add( pointLight );
scene.add( camera );

// renderer

renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setClearColor( 0x20252f );
renderer.setPixelRatio( window.devicePixelRatio );
document.body.appendChild( renderer.domElement );
refractor.material.uniforms.tDudv.value = dudvMap;

//

const controls = new OrbitControls( camera, renderer.domElement );
controls.minDistance = 10;
controls.maxDistance = 100;

//
const geometry = new THREE.IcosahedronGeometry( 5, 0 );
const material = new THREE.MeshPhongMaterial( { color: 0xffffff, emissive: 0x333333, flatShading: true } );
smallSphere = new THREE.Mesh( geometry, material );
scene.add( smallSphere );

// walls
const planeGeo = new THREE.PlaneGeometry( 100.1, 100.1 );

const planeTop = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0xffffff } ) );
planeTop.position.y = 100;
planeTop.rotateX( Math.PI / 2 );
scene.add( planeTop );

const planeBottom = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0xffffff } ) );
planeBottom.rotateX( - Math.PI / 2 );
scene.add( planeBottom );

const planeBack = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0x7f7fff } ) );
planeBack.position.z = - 50;
planeBack.position.y = 50;
scene.add( planeBack );

const planeRight = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0x00ff00 } ) );
planeRight.position.x = 50;
planeRight.position.y = 50;
planeRight.rotateY( - Math.PI / 2 );
scene.add( planeRight );

const planeLeft = new THREE.Mesh( planeGeo, new THREE.MeshPhongMaterial( { color: 0xff0000 } ) );
planeLeft.position.x = - 50;
planeLeft.position.y = 50;
planeLeft.rotateY( Math.PI / 2 );
scene.add( planeLeft );

// lights
const mainLight = new THREE.PointLight( 0xcccccc, 1.5, 250 );
mainLight.position.y = 60;
scene.add( mainLight );

const greenLight = new THREE.PointLight( 0x00ff00, 0.25, 1000 );
greenLight.position.set( 550, 50, 0 );
scene.add( greenLight );

const redLight = new THREE.PointLight( 0xff0000, 0.25, 1000 );
redLight.position.set( - 550, 50, 0 );
scene.add( redLight );

const blueLight = new THREE.PointLight( 0x7f7fff, 0.25, 1000 );
blueLight.position.set( 0, 50, 550 );
scene.add( blueLight );

window.addEventListener( 'resize', onWindowResize );

Expand All @@ -108,6 +147,7 @@

camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();

renderer.setSize( window.innerWidth, window.innerHeight );

}
Expand All @@ -116,13 +156,17 @@

requestAnimationFrame( animate );

render();

}
const time = clock.getElapsedTime();

function render() {
refractor.material.uniforms.time.value = time;

refractor.material.uniforms[ "time" ].value += clock.getDelta();
smallSphere.position.set(
Math.cos( time ) * 30,
Math.abs( Math.cos( time * 2 ) ) * 20 + 5,
Math.sin( time ) * 30
);
smallSphere.rotation.y = ( Math.PI / 2 ) - time;
smallSphere.rotation.z = time * 8;

renderer.render( scene, camera );

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