Skip to content

Instantly share code, notes, and snippets.

@davidbwaters
Created July 26, 2021 01:47
Show Gist options
  • Save davidbwaters/a9b87fb06819f8d5c44b78382ef0f7d6 to your computer and use it in GitHub Desktop.
Save davidbwaters/a9b87fb06819f8d5c44b78382ef0f7d6 to your computer and use it in GitHub Desktop.
rNmGwGp
<div class="p-summary">
<h1>Hello</h1>
</div>
<canvas class="p-canvas-webgl" id="canvas-webgl"></canvas>
class Plane {
constructor() {
this.uniforms = {
time: {
type: 'f',
value: 0 } };
this.mesh = this.createMesh();
this.time = 1;
}
createMesh() {
return new THREE.Mesh(
new THREE.PlaneGeometry(256, 256, 256, 256),
new THREE.RawShaderMaterial({
uniforms: this.uniforms,
vertexShader: "#define GLSLIFY 1\nattribute vec3 position;\n\nuniform mat4 projectionMatrix;\nuniform mat4 modelViewMatrix;\nuniform float time;\n\nvarying vec3 vPosition;\n\nmat4 rotateMatrixX(float radian) {\n return mat4(\n 1.0, 0.0, 0.0, 0.0,\n 0.0, cos(radian), -sin(radian), 0.0,\n 0.0, sin(radian), cos(radian), 0.0,\n 0.0, 0.0, 0.0, 1.0\n );\n}\n\n//\n// GLSL textureless classic 3D noise \"cnoise\",\n// with an RSL-style periodic variant \"pnoise\".\n//\n\nvec3 mod289(vec3 x)\n{\n return x - floor(x * (1.0 / 289.0)) * 289.0;\n}\n\nvec4 mod289(vec4 x)\n{\n return x - floor(x * (1.0 / 289.0)) * 289.0;\n}\n\nvec4 permute(vec4 x)\n{\n return mod289(((x*34.0)+1.0)*x);\n}\n\nvec4 taylorInvSqrt(vec4 r)\n{\n return 1.79284291400159 - 0.85373472095314 * r;\n}\n\nvec3 fade(vec3 t) {\n return t*t*t*(t*(t*6.0-15.0)+10.0);\n}\n\n// Classic Perlin noise\nfloat cnoise(vec3 P)\n{\n vec3 Pi0 = floor(P); // Integer part for indexing\n vec3 Pi1 = Pi0 + vec3(1.0); // Integer part + 1\n Pi0 = mod289(Pi0);\n Pi1 = mod289(Pi1);\n vec3 Pf0 = fract(P); // Fractional part for interpolation\n vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0\n vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);\n vec4 iy = vec4(Pi0.yy, Pi1.yy);\n vec4 iz0 = Pi0.zzzz;\n vec4 iz1 = Pi1.zzzz;\n\n vec4 ixy = permute(permute(ix) + iy);\n vec4 ixy0 = permute(ixy + iz0);\n vec4 ixy1 = permute(ixy + iz1);\n\n vec4 gx0 = ixy0 * (1.0 / 7.0);\n vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;\n gx0 = fract(gx0);\n vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);\n vec4 sz0 = step(gz0, vec4(0.0));\n gx0 -= sz0 * (step(0.0, gx0) - 0.5);\n gy0 -= sz0 * (step(0.0, gy0) - 0.5);\n\n vec4 gx1 = ixy1 * (1.0 / 7.0);\n vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;\n gx1 = fract(gx1);\n vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);\n vec4 sz1 = step(gz1, vec4(0.0));\n gx1 -= sz1 * (step(0.0, gx1) - 0.5);\n gy1 -= sz1 * (step(0.0, gy1) - 0.5);\n\n vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);\n vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);\n vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);\n vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);\n vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);\n vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);\n vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);\n vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);\n\n vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));\n g000 *= norm0.x;\n g010 *= norm0.y;\n g100 *= norm0.z;\n g110 *= norm0.w;\n vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));\n g001 *= norm1.x;\n g011 *= norm1.y;\n g101 *= norm1.z;\n g111 *= norm1.w;\n\n float n000 = dot(g000, Pf0);\n float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));\n float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));\n float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));\n float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));\n float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));\n float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));\n float n111 = dot(g111, Pf1);\n\n vec3 fade_xyz = fade(Pf0);\n vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);\n vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);\n float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x);\n return 2.2 * n_xyz;\n}\n\nvoid main(void) {\n vec3 updatePosition = (rotateMatrixX(radians(90.0)) * vec4(position, 1.0)).xyz;\n float sin1 = sin(radians(updatePosition.x / 128.0 * 90.0));\n vec3 noisePosition = updatePosition + vec3(0.0, 0.0, time * -30.0);\n float noise1 = cnoise(noisePosition * 0.08);\n float noise2 = cnoise(noisePosition * 0.06);\n float noise3 = cnoise(noisePosition * 0.4);\n vec3 lastPosition = updatePosition + vec3(0.0,\n noise1 * sin1 * 8.0\n + noise2 * sin1 * 8.0\n + noise3 * (abs(sin1) * 2.0 + 0.5)\n + pow(sin1, 2.0) * 40.0, 0.0);\n\n vPosition = lastPosition;\n gl_Position = projectionMatrix * modelViewMatrix * vec4(lastPosition, 1.0);\n}\n",
fragmentShader: "precision highp float;\n#define GLSLIFY 1\n\nvarying vec3 vPosition;\n\nvoid main(void) {\n float opacity = (96.0 - length(vPosition)) / 256.0 * 0.6;\n vec3 color = vec3(0.6);\n gl_FragColor = vec4(color, opacity);\n}\n",
transparent: true }));
}
render(time) {
this.uniforms.time.value += time * this.time;
}}
const canvas = document.getElementById('canvas-webgl');
const renderer = new THREE.WebGLRenderer({
antialias: false,
canvas: canvas });
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 10000);
const clock = new THREE.Clock();
const plane = new Plane();
const resizeWindow = () => {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
};
const on = () => {
$(window).on('resize', () => {
resizeWindow();
});
};
const render = () => {
plane.render(clock.getDelta());
renderer.render(scene, camera);
};
const renderLoop = () => {
render();
requestAnimationFrame(renderLoop);
};
const init = () => {
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(0xece5da, 1.0);
camera.position.set(0, 16, 128);
camera.lookAt(new THREE.Vector3(0, 28, 0));
scene.add(plane.mesh);
on();
resizeWindow();
renderLoop();
};
init();
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r79/three.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
@import url("https://fonts.googleapis.com/css?family=Ropa+Sans");
.p-summary {
position: absolute;
top: 50%;
left: 50%;
transform:translate(-50%, -50%);
text-align:center;
z-index: 2;
font-family: "Ropa Sans";
}
.p-summary h1 {
font-weight: 900;
letter-spacing: 0.2em;
color: #fff;
}
.p-summary p {
letter-spacing: 0.2em;
}
.p-summary a {
color: #333;
}
.p-canvas-webgl {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: 1;
}
html, body {
background:greenyellow;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment