Adding support for "resurrecting" volumetric code, which is rendered to a separate channel and can be given separate colors.

README.md

@@ -6,6 +6,7 @@
 
 - [Classic Matrix code](https://rezmason.github.io/matrix)
 - [3D mode](https://rezmason.github.io/matrix?volumetric=true)
+- [Matrix Resurrections code (WIP)](https://rezmason.github.io/matrix?version=resurrections)
 - [Operator Matrix code (with ripple effects)](https://rezmason.github.io/matrix?version=operator)
 - [Code of the "Nightmare Matrix"](https://rezmason.github.io/matrix?version=nightmare)
   - [(you know, this stuff).](http://matrix.wikia.com/wiki/Nightmare_Matrix)

js/bloomPass.js

@@ -42,18 +42,16 @@ export default (regl, config, inputs) => {
   // The high pass restricts the blur to bright things in our input texture.
   const highPass = regl({
     frag: `
-      #define lumaMag vec3(0.2126, 0.7152, 0.0722)
       precision mediump float;
       varying vec2 vUV;
       uniform sampler2D tex;
       uniform float highPassThreshold;
       void main() {
-        vec3 lumaColor = texture2D(tex, vUV).rgb * lumaMag;
-        float luma = lumaColor.r + lumaColor.g + lumaColor.b;
-        if (luma < highPassThreshold) {
-          luma = 0.;
-        }
-        gl_FragColor = vec4(vec3(luma), 1.0);
+        vec3 lumaColor = texture2D(tex, vUV).rgb;
+        if (lumaColor.r < highPassThreshold) lumaColor.r = 0.0;
+        if (lumaColor.g < highPassThreshold) lumaColor.g = 0.0;
+        if (lumaColor.b < highPassThreshold) lumaColor.b = 0.0;
+        gl_FragColor = vec4(lumaColor, 1.0);
       }
     `,
     uniforms: {

js/config.js

@@ -19,6 +19,7 @@ const fonts = {
 const defaults = {
   backgroundColor: [0, 0, 0],
   volumetric: false,
+  resurrectingCodeRatio: 0,
   animationSpeed: 1,
   forwardSpeed: 0.25,
   bloomStrength: 1,
@@ -44,10 +45,10 @@ const defaults = {
   numColumns: 80,
   density: 1,
   paletteEntries: [
-    { rgb: [0.0, 0.0, 0.0], at: 0.0 },
-    { rgb: [0.09, 0.33, 0.04], at: 0.25 },
-    { rgb: [0.39, 0.98, 0.38], at: 0.7 },
-    { rgb: [0.57, 0.97, 0.61], at: 1.0 }
+    { hsl: [0.3, 0.9, 0.0], at: 0.0 },
+    { hsl: [0.3, 0.9, 0.2], at: 0.2 },
+    { hsl: [0.3, 0.9, 0.7], at: 0.7 },
+    { hsl: [0.3, 0.9, 0.8], at: 0.8 }
   ],
   raindropLength: 1,
   slant: 0,
@@ -77,9 +78,9 @@ const versions = {
     rippleTypeName: "box",
     numColumns: 108,
     paletteEntries: [
-      { rgb: [0.0, 0.0, 0.0], at: 0.0 },
-      { rgb: [0.18, 0.9, 0.35], at: 0.6 },
-      { rgb: [0.9, 1.0, 0.9], at: 1.0 }
+      { hsl: [0.4, 0.8, 0.0], at: 0.0 },
+      { hsl: [0.4, 0.8, 0.5], at: 0.5 },
+      { hsl: [0.4, 0.8, 1.0], at: 1.0 }
     ],
     raindropLength: 1.5
   },
@@ -92,11 +93,11 @@ const versions = {
     hasThunder: true,
     numColumns: 60,
     paletteEntries: [
-      { rgb: [0.0, 0.0, 0.0], at: 0.0 },
-      { rgb: [0.32, 0.06, 0.0], at: 0.2 },
-      { rgb: [0.82, 0.06, 0.05], at: 0.4 },
-      { rgb: [1.0, 0.6, 0.3], at: 0.8 },
-      { rgb: [1.0, 1.0, 0.9], at: 1.0 }
+      { hsl: [0.0, 1.0, 0.0], at: 0.0 },
+      { hsl: [0.0, 1.0, 0.2], at: 0.2 },
+      { hsl: [0.0, 1.0, 0.4], at: 0.4 },
+      { hsl: [0.1, 1.0, 0.7], at: 0.7 },
+      { hsl: [0.2, 1.0, 1.0], at: 1.0 }
     ],
     raindropLength: 0.6,
     slant: (22.5 * Math.PI) / 180
@@ -115,13 +116,23 @@ const versions = {
     rippleSpeed: 0.1,
     numColumns: 30,
     paletteEntries: [
-      { rgb: [0.0, 0.0, 0.0], at: 0.0 },
-      { rgb: [0.52, 0.17, 0.05], at: 0.4 },
-      { rgb: [0.82, 0.37, 0.12], at: 0.7 },
-      { rgb: [1.0, 0.74, 0.29], at: 0.9 },
-      { rgb: [1.0, 0.9, 0.8], at: 1.0 }
+      { hsl: [0.0, 0.0, 0.0], at: 0.0 },
+      { hsl: [0.0, 0.8, 0.3], at: 0.3 },
+      { hsl: [0.1, 0.8, 0.5], at: 0.5 },
+      { hsl: [0.1, 1.0, 0.6], at: 0.6 },
+      { hsl: [0.1, 1.0, 0.9], at: 0.9 }
     ],
     raindropLength: 0.4
+  },
+  resurrections: {
+    ...defaults,
+    ...fonts.matrixcode,
+    resurrectingCodeRatio: 0.25,
+    effect:"resurrections",
+    width:100,
+    volumetric:true,
+    density:3,
+    fallSpeed:0.7
   }
 };
 versions.throwback = versions.operator;

js/main.js

@@ -5,6 +5,7 @@ import makeBloomPass from "./bloomPass.js";
 import makePalettePass from "./palettePass.js";
 import makeStripePass from "./stripePass.js";
 import makeImagePass from "./imagePass.js";
+import makeResurrectionPass from "./resurrectionPass.js";
 
 const canvas = document.createElement("canvas");
 document.body.appendChild(canvas);
@@ -29,7 +30,9 @@ const effects = {
   customStripes: makeStripePass,
   stripes: makeStripePass,
   pride: makeStripePass,
-  image: makeImagePass
+  image: makeImagePass,
+  resurrection: makeResurrectionPass,
+  resurrections: makeResurrectionPass
 };
 
 const config = makeConfig(window.location.search);

js/palettePass.js

@@ -1,5 +1,14 @@
 import { extractEntries, make1DTexture, makePassFBO, makePass } from "./utils.js";
 
+const colorToRGB = ([hue, saturation, lightness]) => {
+  const a = saturation * Math.min(lightness, 1 - lightness);
+  const f = (n) => {
+    const k = (n + hue * 12) % 12;
+    return lightness - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));
+  };
+  return [f(0), f(8), f(4)];
+};
+
 const makePalette = (regl, entries) => {
   const PALETTE_SIZE = 2048;
   const paletteColors = Array(PALETTE_SIZE);
@@ -7,7 +16,7 @@ const makePalette = (regl, entries) => {
     .slice()
     .sort((e1, e2) => e1.at - e2.at)
     .map(entry => ({
-      rgb: entry.rgb,
+      rgb: colorToRGB(entry.hsl),
       arrayIndex: Math.floor(
         Math.max(Math.min(1, entry.at), 0) * (PALETTE_SIZE - 1)
       )
@@ -73,7 +82,8 @@ export default (regl, config, inputs) => {
       }
 
       void main() {
-        float brightness = texture2D( tex, vUV ).r + texture2D( bloomTex, vUV ).r;
+        vec4 brightnessRGB = texture2D( tex, vUV ) + texture2D( bloomTex, vUV );
+        float brightness = brightnessRGB.r + brightnessRGB.g + brightnessRGB.b;
         float at = brightness - rand( gl_FragCoord.xy, time ) * ditherMagnitude;
         gl_FragColor = texture2D( palette, vec2(at, 0.0)) + vec4(backgroundColor, 0.0);
       }

js/renderer.js

@@ -65,6 +65,7 @@ export default (regl, config) => {
       "rippleScale",
       "rippleSpeed",
       "rippleThickness",
+      "resurrectingCodeRatio",
       // rain vertex
       "forwardSpeed",
       // rain render
@@ -293,6 +294,7 @@ export default (regl, config) => {
       }
     },
     vert: `
+      #define PI 3.14159265359
       precision lowp float;
       attribute vec2 aPosition, aCorner;
       uniform sampler2D lastState;
@@ -304,8 +306,17 @@ export default (regl, config) => {
       uniform float time, animationSpeed, forwardSpeed;
       uniform bool volumetric;
       uniform bool showComputationTexture;
+      uniform float resurrectingCodeRatio;
       varying vec2 vUV;
+      varying vec3 vChannel;
       varying vec4 vGlyph;
+
+      highp float rand( const in vec2 uv ) {
+        const highp float a = 12.9898, b = 78.233, c = 43758.5453;
+        highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
+        return fract(sin(sn) * c);
+      }
+
       void main() {
 
         vUV = (aPosition + aCorner) * quadSize;
@@ -319,8 +330,16 @@ export default (regl, config) => {
         vec2 position = (aPosition + aCorner * vec2(density, 1.)) * quadSize;
         vec4 pos = vec4((position - 0.5) * 2.0, quadDepth, 1.0);
 
+        vChannel = vec3(1.0, 0.0, 0.0);
+
         if (volumetric) {
+          if (rand(vec2(aPosition.x, 0)) < resurrectingCodeRatio) {
+            pos.y = -pos.y;
+            vChannel = vec3(0.0, 1.0, 0.0);
+          }
+
           pos.x /= glyphHeightToWidth;
+
           pos = camera * transform * pos;
         } else {
           pos.xy *= screenSize;
@@ -348,6 +367,7 @@ export default (regl, config) => {
       uniform bool volumetric;
 
       varying vec2 vUV;
+      varying vec3 vChannel;
       varying vec4 vGlyph;
 
       float median3(vec3 i) {
@@ -416,7 +436,7 @@ export default (regl, config) => {
         float sigDist = median3(dist) - 0.5;
         float alpha = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
 
-        gl_FragColor = vec4(vec3(brightness * alpha), 1.0);
+        gl_FragColor = vec4(vChannel * brightness * alpha, 1.0);
       }
     `,
 

js/resurrectionPass.js

@@ -0,0 +1,78 @@
+import { extractEntries, make1DTexture, makePassFBO, makePass } from "./utils.js";
+
+const colorToRGB = ([hue, saturation, lightness]) => {
+  const a = saturation * Math.min(lightness, 1 - lightness);
+  const f = (n) => {
+    const k = (n + hue * 12) % 12;
+    return lightness - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));
+  };
+  return [f(0), f(8), f(4)];
+};
+
+export default (regl, config, inputs) => {
+  const output = makePassFBO(regl, config.useHalfFloat);
+
+  return makePass(
+    {
+      primary: output
+    },
+    regl({
+      frag: `
+      precision mediump float;
+      #define PI 3.14159265359
+
+      uniform sampler2D tex;
+      uniform sampler2D bloomTex;
+      uniform float ditherMagnitude;
+      uniform float time;
+      uniform vec3 backgroundColor;
+      varying vec2 vUV;
+
+      highp float rand( const in vec2 uv, const in float t ) {
+        const highp float a = 12.9898, b = 78.233, c = 43758.5453;
+        highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );
+        return fract(sin(sn) * c + t);
+      }
+
+      float rgbComponent(float p, float q, float t) {
+        if (t < 0.0) t += 1.0;
+        if (t > 1.0) t -= 1.0;
+        if (t < 1.0 / 6.0) return p + (q - p) * 6.0 * t;
+        if (t < 1.0 / 2.0) return q;
+        if (t < 2.0 / 3.0) return p + (q - p) * (2.0 / 3.0 - t) * 6.0;
+        return p;
+      }
+
+      vec3 hslToRgb(float h, float s, float l){
+        float q = l < 0.5 ? l * (1. + s) : l + s - l * s;
+        float p = 2.0 * l - q;
+        return vec3(
+          rgbComponent(p, q, h + 1.0 / 3.0),
+          rgbComponent(p, q, h),
+          rgbComponent(p, q, h - 1.0 / 3.0)
+        );
+      }
+
+      void main() {
+
+        vec3 brightness = mix(texture2D( bloomTex, vUV ).rgb, texture2D( tex, vUV ).rgb, (0.7 - length(vUV - 0.5))) * 1.25 - rand( gl_FragCoord.xy, time ) * ditherMagnitude;
+
+        float hue = 0.35 + (length(vUV - vec2(0.5, 1.0)) * -0.4 + 0.2);
+        vec3 rgb = hslToRgb(hue, 0.8, max(0., brightness.r)) * vec3(0.8, 1.0, 0.7);
+        vec3 resurrectionRGB = hslToRgb(0.13, 1.0, max(0., brightness.g) * 0.5);
+        gl_FragColor = vec4(rgb + resurrectionRGB + backgroundColor, 1.0);
+      }
+    `,
+
+      uniforms: {
+        ...extractEntries(config, [
+          "backgroundColor",
+        ]),
+        tex: inputs.primary,
+        bloomTex: inputs.bloom,
+        ditherMagnitude: 0.05
+      },
+      framebuffer: output
+    })
+  );
+};