Rocky
bf4492ee2f
Replace the custom liquid aurora shader with the MIT wave-gradient mesh animation, vendored locally and tinted for OSG brand colors.
342 lines
14 KiB
JavaScript
342 lines
14 KiB
JavaScript
/*! wave-gradient (MIT) https://github.com/sa3dany/wave-gradient — Copyright (c) 2022 Mohamed ElSaadany */
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"use strict";
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var WaveGradientModule = (() => {
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var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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// src/wave-gradient.js
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var wave_gradient_exports = {};
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__export(wave_gradient_exports, {
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WaveGradient: () => WaveGradient
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});
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// src/shaders.js
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var vert = `#version 300 es
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vec3 o(vec3 i,vec3 c,float r){return c*r+i*(1.-r);}vec3 o(vec3 n){return n-floor(n*(1./289.))*289.;}vec4 o(vec4 n){return n-floor(n*(1./289.))*289.;}vec4 e(vec4 n){return o((n*34.+1.)*n);}vec4 v(vec4 y){return 1.79284291400159-.85373472095314*y;}float t(vec3 l){const vec2 s=vec2(1./6.,1./3.);const vec4 u=vec4(0.,.5,1.,2.);vec3 a=floor(l+dot(l,s.yyy)),x=l-a+dot(a,s.xxx),d=step(x.yzx,x.xyz),f=1.-d,z=min(d.xyz,f.zxy),w=max(d.xyz,f.zxy),m=x-z+s.xxx,C=x-w+s.yyy,p=x-u.yyy;a=o(a);vec4 P=e(e(e(a.z+vec4(0.,z.z,w.z,1.))+a.y+vec4(0.,z.y,w.y,1.))+a.x+vec4(0.,z.x,w.x,1.));vec3 S=.142857142857*u.wyz-u.xzx;vec4 L=P-49.*floor(P*S.z*S.z),F=floor(L*S.z),R=floor(L-7.*F),n=F*S.x+S.yyyy,W=R*S.x+S.yyyy,b=1.-abs(n)-abs(W),G=vec4(n.xy,W.xy),q=vec4(n.zw,W.zw),h=floor(G)*2.+1.,g=floor(q)*2.+1.,O=-step(b,vec4(0.)),B=G.xzyw+h.xzyw*O.xxyy,A=q.xzyw+g.xzyw*O.zzww;vec3 E=vec3(B.xy,b.x),Z=vec3(B.zw,b.y),Y=vec3(A.xy,b.z),X=vec3(A.zw,b.w);vec4 V=v(vec4(dot(E,E),dot(Z,Z),dot(Y,Y),dot(X,X)));E*=V.x;Z*=V.y;Y*=V.z;X*=V.w;vec4 U=max(.6-vec4(dot(x,x),dot(m,m),dot(C,C),dot(p,p)),0.);U=U*U;return 42.*dot(U*U,vec4(dot(E,x),dot(Z,m),dot(Y,C),dot(X,p)));}uniform mediump vec2 u_Resolution;uniform float u_Amplitude,u_Realtime,u_Seed;uniform vec3 u_BaseColor;uniform int u_LayerCount;uniform struct WaveLayers{float noiseCeil;float noiseFloor;float noiseFlow;float noiseSeed;float noiseSpeed;vec2 noiseFreq;vec3 color;} u_WaveLayers[9];in vec3 a_Position;out vec3 v_Color;void main(){float T=u_Realtime*5e-6;vec2 Q=vec2(.00014,.00029),N=u_Resolution*a_Position.xy*Q;float M=u_Amplitude*(2./u_Resolution.y),K=t(vec3(N.x*3.+T*3.,N.y*4.,T*10.+u_Seed));K*=1.-pow(abs(a_Position.y),2.);K=max(0.,K);gl_Position=vec4(a_Position.x,a_Position.y+K*M,a_Position.z,1.);v_Color=u_BaseColor;for(int a=0;a<u_LayerCount;a++){WaveLayers J=u_WaveLayers[a];float K=t(vec3(N.x*J.noiseFreq.x+T*J.noiseFlow,N.y*J.noiseFreq.y,T*J.noiseSpeed+J.noiseSeed));K=K/2.+.5;K=smoothstep(J.noiseFloor,J.noiseCeil,K);v_Color=o(v_Color,J.color,pow(K,4.));}}
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`;
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var frag = `#version 300 es
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precision mediump float;uniform vec2 u_Resolution;uniform float u_ShadowPower;in vec3 v_Color;out vec4 color;void main(){vec2 I=gl_FragCoord.xy/u_Resolution.xy;color=vec4(v_Color,1.);color.y-=pow(I.y+sin(-12.)*I.x,u_ShadowPower)*.4;}
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`;
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// src/wave-gradient.js
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function parseRGB(hex) {
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const result = hex.match(/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i) || hex.match(/^#?([a-f\d])([a-f\d])([a-f\d])$/i);
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return result ? result.slice(1, 4).map((c) => {
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return parseInt(c.length < 2 ? c + c : c, 16) / 255;
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}) : null;
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}
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var ClipSpace = class {
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static createPlaneGeometry(widthSegments, depthSegments) {
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const gridX = Math.ceil(widthSegments);
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const gridZ = Math.ceil(depthSegments);
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const vertexCount = 3 * (gridX + 1) * (gridZ + 1);
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const indexCount = 3 * 2 * gridX * gridZ;
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const positions = new ArrayBuffer(4 * vertexCount);
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const indices = new ArrayBuffer(4 * indexCount);
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for (let z = gridZ, i = 0, view = new DataView(positions); z >= 0; z--) {
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const v = z / gridZ;
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const clipY = v * 2 - 1;
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for (let x = gridX; x >= 0; x--, i += 3) {
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const clipX = x / gridX * 2 - 1;
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view.setFloat32((i + 0) * 4, clipX, true);
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view.setFloat32((i + 1) * 4, clipY, true);
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view.setFloat32((i + 2) * 4, v, true);
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}
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}
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const verticesAcross = gridX + 1;
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for (let z = 0, i = 0, view = new DataView(indices); z < gridZ; z++) {
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for (let x = 0; x < gridX; x++, i += 6) {
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view.setUint32((i + 0) * 4, (z + 0) * verticesAcross + x, true);
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view.setUint32((i + 1) * 4, (z + 0) * verticesAcross + x + 1, true);
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view.setUint32((i + 2) * 4, (z + 1) * verticesAcross + x, true);
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view.setUint32((i + 3) * 4, (z + 0) * verticesAcross + x + 1, true);
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view.setUint32((i + 4) * 4, (z + 1) * verticesAcross + x + 1, true);
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view.setUint32((i + 5) * 4, (z + 1) * verticesAcross + x, true);
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}
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}
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return { positions, indices, count: indexCount };
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}
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static prefixName(name, prefix) {
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return `${prefix}${name[0].toUpperCase()}${name.slice(1)}`;
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}
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constructor(config) {
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this.gl = config.gl;
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this.program = this.createProgram(config.shaders);
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this._attributes = {};
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this.setupAttributes(config.attributes);
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this._elementBuffer;
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this.setElements(config.elements);
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this._uniforms = {};
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this.setupUniforms(config.uniforms);
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}
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compileShader(type, source) {
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const { gl } = this;
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let shader = gl.createShader(type);
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if (!shader)
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throw new Error("can't create shader");
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gl.shaderSource(shader, source);
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gl.compileShader(shader);
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return shader;
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}
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debugProgram(program) {
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const { gl } = this;
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const [vs, fs] = gl.getAttachedShaders(program) ?? [];
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if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
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throw new Error(
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`can't link WebGL program.
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${gl.getProgramInfoLog(program)}
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${gl.getShaderInfoLog(vs)}
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${gl.getShaderInfoLog(fs)}`
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);
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}
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}
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createProgram(shaders) {
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const { gl } = this;
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const [vs, fs] = [
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this.compileShader(gl.VERTEX_SHADER, shaders[0]),
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this.compileShader(gl.FRAGMENT_SHADER, shaders[1])
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];
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const program = gl.createProgram();
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if (!program)
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throw new Error("can't create WebGL program");
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gl.attachShader(program, vs);
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gl.attachShader(program, fs);
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try {
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gl.linkProgram(program);
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this.debugProgram(program);
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} catch (linkError) {
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gl.deleteProgram(program);
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throw linkError;
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} finally {
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gl.deleteShader(vs);
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gl.deleteShader(fs);
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}
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gl.useProgram(program);
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return program;
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}
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createBuffer() {
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const { gl } = this;
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const buffer = gl.createBuffer();
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if (!buffer)
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throw new Error("can't create buffer");
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return buffer;
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}
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setupAttributes(attributes) {
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const { gl, program } = this;
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for (const [name, dataBuffer] of Object.entries(attributes)) {
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const prefixedName = ClipSpace.prefixName(name, "a_");
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const buffer = this.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
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gl.bufferData(gl.ARRAY_BUFFER, dataBuffer, gl.STATIC_DRAW);
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const location = gl.getAttribLocation(program, prefixedName);
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gl.enableVertexAttribArray(location);
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gl.vertexAttribPointer(location, 3, gl.FLOAT, false, 0, 0);
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this._attributes[name] = { buffer, location };
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}
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}
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setAttribute(attributeName, dataBuffer) {
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const { gl } = this;
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gl.bufferData(gl.ARRAY_BUFFER, dataBuffer, gl.STATIC_DRAW);
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}
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setElements(elements) {
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const { gl } = this;
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if (!this._elementBuffer) {
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const buffer = this.createBuffer();
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gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, buffer);
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this._elementBuffer = buffer;
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}
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gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, elements, gl.STATIC_DRAW);
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}
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createUniformSetter(name, type, initialValue) {
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const { gl, program } = this;
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const uniformX = `uniform${type}`;
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const location = gl.getUniformLocation(program, name);
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const setter = (value) => {
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Array.isArray(value) ? gl[uniformX](location, ...value) : gl[uniformX](location, value);
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};
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if (initialValue)
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setter(initialValue);
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return setter;
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}
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setupUniforms(uniforms) {
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for (const [name, uniform] of Object.entries(uniforms)) {
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const prefixedName = ClipSpace.prefixName(name, "u_");
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switch (uniform.type) {
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case void 0:
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Array.isArray(uniform.value) && uniform.value.forEach(
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(member, i) => {
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const structName = name;
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const prefixedStructName = prefixedName;
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for (const [name2, uniform2] of Object.entries(member)) {
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const key = `${structName}[${i}].${name2}`;
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const prefixedKey = `${prefixedStructName}[${i}].${name2}`;
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this._uniforms[key] = this.createUniformSetter(
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prefixedKey,
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uniform2.type,
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uniform2.value
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);
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}
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}
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);
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break;
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default:
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this._uniforms[name] = this.createUniformSetter(
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prefixedName,
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uniform.type,
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uniform.value
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);
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}
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}
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}
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setUniform(uniformName, newValue) {
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this._uniforms[uniformName](newValue);
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}
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delete() {
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const { gl } = this;
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gl.deleteProgram(this.program);
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for (const [, attribute] of Object.entries(this._attributes)) {
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this.gl.deleteBuffer(attribute.buffer);
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}
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}
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};
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var WaveGradient = class {
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constructor(canvas, options) {
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const gl = canvas.getContext("webgl2", {
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antialias: true,
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depth: false,
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powerPreference: "low-power"
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});
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if (!gl)
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throw new Error("can't get WebGL2 context");
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const {
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amplitude = 320,
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colors = ["#ef008f", "#6ec3f4", "#7038ff", "#ffba27"],
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density = [0.06, 0.16],
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fps = 24,
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seed = 0,
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speed = 1.25,
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time = 0,
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wireframe = false
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} = options ?? {};
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const { clientWidth, clientHeight } = canvas;
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canvas.width = clientWidth;
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canvas.height = clientHeight;
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gl.viewport(0, 0, clientWidth, clientHeight);
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gl.enable(gl.CULL_FACE);
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gl.disable(gl.DITHER);
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gl.disable(gl.DEPTH_TEST);
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const geometry = ClipSpace.createPlaneGeometry(
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clientWidth * density[0],
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clientHeight * density[1]
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);
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const clipSpace = new ClipSpace({
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gl,
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shaders: [vert, frag],
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attributes: { position: geometry.positions },
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elements: geometry.indices,
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uniforms: {
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amplitude: { value: amplitude, type: "1f" },
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baseColor: { value: parseRGB(colors[0]), type: "3f" },
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realtime: { value: time, type: "1f" },
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resolution: { value: [clientWidth, clientHeight], type: "2f" },
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seed: { value: seed, type: "1f" },
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shadowPower: { value: 6, type: "1f" },
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layerCount: { value: colors.length - 1, type: "1i" },
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waveLayers: {
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value: colors.slice(1).map((color, i, array) => {
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const r = (i + 1) / array.length + 1;
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return {
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noiseCeil: { value: 0.63 + 0.07 * (i + 1), type: "1f" },
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noiseFloor: { value: 0.1, type: "1f" },
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noiseFlow: { value: 6.5 + 0.3 * (i + 1), type: "1f" },
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noiseSeed: { value: seed + 10 * (i + 1), type: "1f" },
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noiseSpeed: { value: 11 + 0.3 * (i + 1), type: "1f" },
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noiseFreq: { value: [2 + r, 3 + r], type: "2f" },
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color: { value: parseRGB(color), type: "3f" }
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};
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})
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}
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}
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});
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this.gl = gl;
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this.clipSpace = clipSpace;
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this.density = density;
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this.speed = speed;
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this.frameInterval = 1e3 / fps;
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this.lastFrameTime = 0;
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this.shouldRender = true;
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this.drawMode = wireframe ? this.gl.LINES : this.gl.TRIANGLES;
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this.drawCount = geometry.count;
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this.time = time;
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requestAnimationFrame((now) => {
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this.render(now);
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});
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}
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resize() {
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const { gl, gl: { canvas }, clipSpace } = this;
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const { width, clientWidth, height, clientHeight } = canvas;
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const resized = width !== clientWidth || height !== clientHeight;
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if (resized) {
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canvas.width = clientWidth;
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canvas.height = clientHeight;
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gl.viewport(0, 0, clientWidth, clientHeight);
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this.clipSpace.setUniform("resolution", [clientWidth, clientHeight]);
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const geometry = ClipSpace.createPlaneGeometry(
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clientWidth * this.density[0],
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clientHeight * this.density[1]
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);
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clipSpace.setAttribute("position", geometry.positions);
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clipSpace.setElements(geometry.indices);
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this.drawCount = geometry.count;
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}
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}
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render(now) {
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if (this.shouldRender) {
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requestAnimationFrame((now2) => {
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this.render(now2);
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});
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} else {
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return;
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}
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const delta = now - this.lastFrameTime;
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if (delta < this.frameInterval) {
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if (Math.random() > 0.75 === true)
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this.resize();
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return;
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}
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this.lastFrameTime = now - delta % this.frameInterval;
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this.time += Math.min(delta, this.frameInterval) * this.speed;
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this.clipSpace.setUniform("realtime", this.time);
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this.gl.drawElements(
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this.drawMode,
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this.drawCount,
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this.gl.UNSIGNED_INT,
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0
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);
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}
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destroy() {
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this.clipSpace.delete();
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delete this.gl;
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this.shouldRender = false;
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}
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};
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return __toCommonJS(wave_gradient_exports);
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})();
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window.WaveGradient = WaveGradientModule.WaveGradient;
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