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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Shadertoy Basic</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- renderer.autoClearColor = false;
- const camera = new THREE.OrthographicCamera(
- - 1, // left
- 1, // right
- 1, // top
- - 1, // bottom
- - 1, // near,
- 1, // far
- );
- const scene = new THREE.Scene();
- const plane = new THREE.PlaneGeometry( 2, 2 );
- const fragmentShader = `
- #include <common>
- uniform vec3 iResolution;
- uniform float iTime;
- // By iq: https://www.shadertoy.com/user/iq
- // license: Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
- void mainImage( out vec4 fragColor, in vec2 fragCoord )
- {
- // Normalized pixel coordinates (from 0 to 1)
- vec2 uv = fragCoord/iResolution.xy;
- // Time varying pixel color
- vec3 col = 0.5 + 0.5*cos(iTime+uv.xyx+vec3(0,2,4));
- // Output to screen
- fragColor = vec4(col,1.0);
- }
- void main() {
- mainImage(gl_FragColor, gl_FragCoord.xy);
- }
- `;
- const uniforms = {
- iTime: { value: 0 },
- iResolution: { value: new THREE.Vector3() },
- };
- const material = new THREE.ShaderMaterial( {
- fragmentShader,
- uniforms,
- } );
- scene.add( new THREE.Mesh( plane, material ) );
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- function render( time ) {
- time *= 0.001; // convert to seconds
- resizeRendererToDisplaySize( renderer );
- const canvas = renderer.domElement;
- uniforms.iResolution.value.set( canvas.width, canvas.height, 1 );
- uniforms.iTime.value = time;
- renderer.render( scene, camera );
- requestAnimationFrame( render );
- }
- requestAnimationFrame( render );
- }
- main();
- </script>
- </html>
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