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March 27, 2023 00:45
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Minimal three.js shader example.
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| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0"> | |
| <style> | |
| body { | |
| margin: 0px; | |
| overflow: hidden; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="container"></div> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/three.js/r126/three.min.js"></script> | |
| <script id="vertexShader" type="x-shader/x-vertex"> | |
| uniform float time; | |
| uniform vec2 resolution; | |
| void main() { | |
| gl_Position = vec4( position, 1.0 ); | |
| } | |
| </script> | |
| <script id="fragmentShader" type="x-shader/x-fragment"> | |
| uniform float time; | |
| uniform vec2 resolution; | |
| void main() { | |
| float x = mod(time + gl_FragCoord.x, 20.) < 10. ? 1. : 0.; | |
| float y = mod(time + gl_FragCoord.y, 20.) < 10. ? 1. : 0.; | |
| gl_FragColor = vec4(vec3(min(x, y)), 1.); | |
| } | |
| </script> | |
| <script> | |
| var container; | |
| var camera, scene, renderer; | |
| var uniforms, material, mesh; | |
| var mouseX = 0, mouseY = 0, | |
| lat = 0, lon = 0, phy = 0, theta = 0; | |
| var windowHalfX = window.innerWidth / 2; | |
| var windowHalfY = window.innerHeight / 2; | |
| init(); | |
| var startTime = Date.now(); | |
| animate(); | |
| function init() { | |
| container = document.getElementById('container'); | |
| camera = new THREE.Camera(); | |
| camera.position.z = 1; | |
| scene = new THREE.Scene(); | |
| uniforms = { | |
| time: { type: "f", value: 1.0 }, | |
| resolution: { type: "v2", value: new THREE.Vector2() } | |
| }; | |
| material = new THREE.ShaderMaterial({ | |
| uniforms: uniforms, | |
| vertexShader: document.getElementById('vertexShader').textContent, | |
| fragmentShader: document.getElementById('fragmentShader').textContent | |
| }); | |
| mesh = new THREE.Mesh(new THREE.PlaneGeometry(2, 2), material); | |
| scene.add(mesh); | |
| renderer = new THREE.WebGLRenderer(); | |
| renderer.setPixelRatio(window.devicePixelRatio ? window.devicePixelRatio : 1); | |
| container.appendChild(renderer.domElement); | |
| uniforms.resolution.value.x = window.innerWidth; | |
| uniforms.resolution.value.y = window.innerHeight; | |
| renderer.setSize(window.innerWidth, window.innerHeight); | |
| } | |
| function animate() { | |
| requestAnimationFrame(animate); | |
| render(); | |
| } | |
| function render() { | |
| var elapsedMilliseconds = Date.now() - startTime; | |
| var elapsedSeconds = elapsedMilliseconds / 1000.; | |
| uniforms.time.value = 60. * elapsedSeconds; | |
| renderer.render(scene, camera); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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@kylemcdonald, what do you want to do with
uniforms.resolution? You set it up but never used it...