squint/examples/threejs/playground.html at main · squint-cljs/squint · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>Squint</title>
    <meta content="width=device-width, initial-scale=1" name="viewport">
    <meta content="text/html;charset=utf-8" http-equiv="Content-Type">
    <meta content="utf-8" http-equiv="encoding">
    <script src="https://unpkg.com/node-inspect-extracted/dist/inspect.js"></script>
    <script async src="https://ga.jspm.io/npm:es-module-shims@1.8.2/dist/es-module-shims.js" crossorigin="anonymous"></script>
    <script type="importmap">
      {
        "imports": {
          "squint-cljs": "https://unpkg.com/squint-cljs@0.4.67/index.js",
          "squint-cljs/core.js": "https://unpkg.com/squint-cljs@0.4.67/core.js",
          "squint-cljs/string.js": "https://unpkg.com/squint-cljs@0.4.67/string.js",
          "@codemirror/language": "https://ga.jspm.io/npm:@codemirror/language@6.9.2/dist/index.js",
          "@codemirror/state": "https://ga.jspm.io/npm:@codemirror/state@6.3.1/dist/index.js",
          "@codemirror/view": "https://ga.jspm.io/npm:@codemirror/view@6.21.4/dist/index.js",
          "@nextjournal/clojure-mode": "https://ga.jspm.io/npm:@nextjournal/clojure-mode@0.3.0/dist/nextjournal/clojure_mode.mjs",
          "@nextjournal/clojure-mode/extensions/eval-region": "https://ga.jspm.io/npm:@nextjournal/clojure-mode@0.3.0/dist/nextjournal/clojure_mode/extensions/eval_region.mjs",
          "three": "https://unpkg.com/three@0.158.0/build/three.module.js",
          "three/addons/": "https://unpkg.com/three@0.158.0/examples/jsm/",
          "easing": "https://ga.jspm.io/npm:easing@1.2.1/browser-easing.js",
          "bezier-easing": "https://unpkg.com/bezier-easing@2.1.0/dist/bezier-easing.js"
        },
        "scopes": {
          "https://ga.jspm.io/": {
            "@codemirror/commands": "https://ga.jspm.io/npm:@codemirror/commands@6.3.0/dist/index.js",
            "@lezer/common": "https://ga.jspm.io/npm:@lezer/common@1.1.0/dist/index.js",
            "@lezer/highlight": "https://ga.jspm.io/npm:@lezer/highlight@1.1.6/dist/index.js",
            "@lezer/lr": "https://ga.jspm.io/npm:@lezer/lr@1.3.13/dist/index.js",
            "@lezer/markdown": "https://ga.jspm.io/npm:@lezer/markdown@1.1.0/dist/index.js",
            "@nextjournal/lezer-clojure": "https://ga.jspm.io/npm:@nextjournal/lezer-clojure@1.0.0/dist/index.es.js",
            "style-mod": "https://ga.jspm.io/npm:style-mod@4.1.0/src/style-mod.js",
            "w3c-keyname": "https://ga.jspm.io/npm:w3c-keyname@2.2.8/index.js"
          }
        }
      }
    </script>
    <style>
      :root {
        --teal-color: #31afd0;
      }
    </style>

    <script type="module">
      import { default_extensions, complete_keymap } from '@nextjournal/clojure-mode';
      import * as eval_region from '@nextjournal/clojure-mode/extensions/eval-region';
      import { EditorView, drawSelection, keymap } from  '@codemirror/view';
      import { EditorState } from  '@codemirror/state';
      import { syntaxHighlighting, defaultHighlightStyle, foldGutter } from '@codemirror/language';
      let theme = EditorView.theme({
        ".cm-content": {whitespace: "pre-wrap",
                        passing: "10px 0",
                        flex: "1 1 0"},

        "&.cm-focused": {outline: "0 !important"},
        ".cm-line": {"padding": "0 9px",
                     "line-height": "1.6",
                     "font-size": "16px",
                     "font-family": "var(--code-font)"},
        ".cm-matchingBracket": {"border-bottom": "1px solid var(--teal-color)",
                                "color": "inherit"},
        ".cm-gutters": {background: "transparent",
                        border: "none"},
        ".cm-gutterElement": {"margin-left": "5px"},
        // only show cursor when focused
        ".cm-cursor": {visibility: "hidden"},
        "&.cm-focused .cm-cursor": {visibility: "visible"}
      });

      let squintExtension = ( opts ) => {
        return keymap.of([{key: "Alt-Enter", run: evalCell},
                          {key: opts.modifier + "-Enter",
                           run: evalAtCursor,
                           shift: evalToplevel
                          }])}

      let urlParams = new URLSearchParams(window.location.search);
      var repl = true;

      let evalCode = async (code) => {
        try {
        let js = compileString(`(do ${code}\n)`, {repl: repl, "elide-exports": repl, context: repl ? 'return' : 'statement'});
        if (dev) {
          js = js.replace('squint-cljs/core.js', 'http://' + window.location.host + '/core.js');
        }
        document.querySelector('#compiledCode').innerText = js;
        if (!repl) {
          const encodedJs = encodeURIComponent(js);
          const dataUri = 'data:text/javascript;charset=utf-8;eval=' + Date.now() + ',' + encodedJs;
          let result = await import(dataUri);
        } else {
          let result = await eval(`(async function() { ${js} })()`);
        document.querySelector('#result').innerText = util.inspect(result);
        if (docChanged) {
          let url = new URL(window.location.href);
          url.searchParams.delete("src");
          window.history.replaceState(null, null, url);
          localStorage.setItem("document", editor.state.doc.toString());
          docChanged = false;
        }

        }
        }
        catch (e) {
          document.querySelector('#result').innerText = util.inspect(e);
          console.error(e);
        }
      }

      let evalCell = (opts) => {
        let js = opts.state.doc.toString();
        evalCode(js);
        return true;
      }

      let evalAtCursor = (opts) => {
        if (!repl) return;
        let js = eval_region.cursor_node_string(opts.state).toString();
        evalCode(js);
        return true;
        }

      let docChanged = false;

      let evalToplevel = (js) => {
        if (!repl) return;
        return true;
      }
        let updateExt = EditorView.updateListener.of((update) => {
        if (update.docChanged) docChanged = true;
      });
      let extensions = [
        theme,
        foldGutter(),
        syntaxHighlighting(defaultHighlightStyle),
        drawSelection(),
        keymap.of(complete_keymap),
        squintExtension({modifier: "Meta"}),
        eval_region.extension({modifier: "Meta"}),
        updateExt,
        ...default_extensions
      ];

      let doc = `
(ns user
  (:require ["squint-cljs/core.js" :as squint]
   ["three" :as three]
   ["three/addons/postprocessing/EffectComposer.js" :refer [EffectComposer]]
   ["three/addons/postprocessing/RenderPass.js" :refer [RenderPass]]
   ["three/addons/postprocessing/UnrealBloomPass.js" :refer [UnrealBloomPass]]
   ["three/addons/postprocessing/FilmPass.js" :refer [FilmPass]]
   ["easing$default" :as easing]
   ["bezier-easing" :as BezierEasing]))

(def BezierEasing js/globalThis.BezierEasing)
(def Math js/globalThis.Math)

(defn ^:async eval-script [url]
  (let [resp (js-await (js/fetch url))
        script (js-await (.text resp))]
    (js/eval.call js/globalThis script)))

(js-await (eval-script "https://unpkg.com/dat.gui@0.7.9/build/dat.gui.js"))
(def dat js/globalThis.dat)

(js-await (eval-script "https://unpkg.com/stats.js@0.17.0/build/stats.min.js"))
(def Stats js/globalThis.Stats)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; controls

(def params
  {:magnitude 0.1
   :x-scale 1.0
   :y-scale 0.5
   :sin-x-scale 0.0
   :cos-y-scale 1.0})

(def gui
  (doto (dat/GUI.)
    (.add params "magnitude" 0.0 0.5)
    (.add params "x-scale" 0.0 2.0)
    (.add params "y-scale" 0.0 2.0)
    (.add params "sin-x-scale" 0.0 2.0)
    (.add params "cos-y-scale" 0.0 2.0)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; basic three.js setup

(def scene
  (three/Scene.))

(def origin (three/Vector3.))

(def height (/ (.-innerHeight js/window) 2))
(def width (min (* 2 height) (.-innerWidth js/window)))


(def camera
  (doto (three/PerspectiveCamera. 75 (/ width height) 0.1 1000)
    (-> :position ((fn [pos] (.set pos 0 0 70))))
    (.lookAt origin)))

(def renderer
  (doto (three/WebGLRenderer. (clj->js {:antialias true}))
    (.setPixelRatio (.-devicePixelRatio js/window))
    (.setSize width height)
    (-> (assoc! :toneMapping three/ReinhardToneMapping
                :toneMappingExposure (Math/pow 1.4 5.0))
      (-> :domElement js/document.body.prepend))))

;; effects composer for after effects
(def composer
  (let [w (get js/window :innerWidth)
        h (get js/window :innerHeight)]
    (doto (EffectComposer. renderer)
      (.addPass (RenderPass. scene camera))
      (.addPass (UnrealBloomPass. (three/Vector2. w h) ; viewport resolution
                                        0.3   ; strength
                                        0.2   ; radius
                                        0.8)) ; threshold
      (.addPass (assoc! (FilmPass. 0.25  ; noise intensity
                                   0.26  ; scanline intensity
                                   648   ; scanline count
                                   false); grayscale
                          :renderToScreen true)))))

;; animation helpers
(def current-frame (atom 0))

(def linear (easing 76 "linear" {:endToEnd true}))

(def bezier
  (mapv (BezierEasing. 0.74 -0.01 0.21 0.99)
        (range 0 1 (/ 1.0 76))))

(defn fix-zero [n]
  (if (zero? n) 1 n))

(def mesh
  (let [m (three/Points. (three/SphereGeometry. 11 64 64)
                         (three/PointsMaterial. {:vertexColors true
                                                 :size 0.7
                                                 :transparent true
                                                 :alphaTest 0.5
                                                 :blending three/AdditiveBlending}))]
    (.add scene m)
    m))

(defn render []
  (let [num-frames 76]
    (swap! current-frame #(mod (inc %) num-frames))
    (let [sphere (three/SphereGeometry. 11 64 64)
          sphere-verts (.getAttribute sphere "position")
          points (mapv #(let [sv (.fromBufferAttribute (three/Vector3.) sphere-verts %)]
                          (.addScaledVector sv sv (* (:magnitude params)
                                                     (fix-zero (* (:x-scale params) (.-x sv)))
                                                     (fix-zero (* (:y-scale params) (.-y sv)))
                                                     (fix-zero (* (:sin-x-scale params) (Math/sin (.-x sv))))
                                                     (fix-zero (* (:cos-y-scale params) (Math/cos (.-y sv))))
                                                     (nth linear @current-frame))))
                       (range (:count sphere-verts)))
          dists (mapv #(.distanceTo origin %) points)
          min-dist (apply min dists)
          max-dist (- (apply max dists) min-dist)]
      (doto (.-geometry mesh)
        (.setFromPoints points)
        (.setAttribute "color" (three/Float32BufferAttribute.
                                (mapcat #(let [c (three/Color.)]
                                           ;; mutate the color object and return the resulting RGB values
                                           (.setHSL c
                                                    (+ 0.3 (* 0.5 (max (min 1.0 (/ (- (get dists %) min-dist) max-dist)) 0)))
                                                    0.8
                                                    0.2)
                                           [(.-r c) (.-g c) (.-b c)])
                                        (range (:count sphere-verts)))
                                3))))
    (squint/assoc-in! mesh [:rotation :y] (* 1.5 Math/PI (nth bezier @current-frame))))
  (.render composer (nth bezier @current-frame))) ; render from the effects composer

(defn animate [s]
  (.begin s)
  (render)
  (.end s)
  (.requestAnimationFrame js/window #(animate s)))

(defn ^:async init []
  (let [s (Stats. [])]
    (js/document.body.prepend (:dom s))
    (animate s)))

(defonce doit (do (init) true))
`.trim();
      let boilerplate = urlParams.get('boilerplate');
      let boilerplateSrc;
      if (boilerplate) {
        boilerplateSrc = await fetch(boilerplate).then(p => p.text());
      }
      let src = urlParams.get('src');
      if (src) {
        if (/http(s)?:\/\/.*/.test(src)) {
          src = await fetch(src).then(p => p.text());
        }
        else {
          src = atob(src)
        };
        doc = src;
      } else {
        // doc = localStorage.getItem("document") || doc;
      }
      let state = EditorState.create({doc: doc,
        extensions: extensions });
      let editorElt = document.querySelector('#editor');
      let editor = new EditorView({state: state,
                                   parent: editorElt,
        extensions: extensions });
      globalThis.editor = editor;
      var dev = JSON.parse(urlParams.get('dev')) ?? location.hostname === 'localhost';

      var squintUrl;
      if (dev) {
        console.log('Loading development squint.js')
        squintUrl = '/index.js';
      } else {
        squintUrl = 'squint-cljs';
      }
      var squint = await(import(squintUrl));
      var compileString = squint.compileString;
      window.compile = () => {
        let code = editor.state.doc.toString();
        code = '' + boilerplateSrc + '\n\n' + code;
        evalCode(code);
      }
      window.share = () => {
        let code = editor.state.doc.toString().trim();
        code = btoa(code);
        let url = new URL(window.location);
        url.searchParams.set('src', code);
        window.location = url;
      }

      window.changeREPL = (target) => {
        document.getElementById('result').innerText = '';
        if (target.checked) {
          repl = true;
          compile();
        } else {
          repl = false;
          compile();
        }
        let url = new URL(window.location.href);
        if (repl) {
          url.searchParams.set("repl", repl);
        } else {
          url.searchParams.delete("repl");
        }
        window.history.replaceState(null, null, url);
      }
      if (repl) {
        document.getElementById('replCheckBox').checked = true;
      }
      compile();
    </script>
  </head>
  <body>
    <div style="display: flex; flex-direction: row; max-height: 90vh; overflow: auto;">
      <div style="position: absolute; right: 0px; top: 0px; margin: 2px">
      <a href="https://gitHub.com/squint-cljs/squint"><img src="https://img.shields.io/github/stars/squint-cljs/squint.svg?style=social&label=Star"></a></div>
      <div id="editor" style="max-height: 90vh; overflow: auto; width: 50%; border: 1px solid grey; border-radius: 10px; margin-bottom: 10px;">
      </div>
      <div style="width: 50%; max-height: 90vh; overflow: auto; border: 1px solid grey; border-radius: 10px; margin-left: 10px; padding: 10px; margin-bottom: 10px;">
              <button onClick="compile()">
        Compile!
              </button>
              <button onClick="share()">
                Share!
              </button>
              <br>
              <label>REPL-mode
                <input type="checkbox" id="replCheckBox" name="repl" onChange="changeREPL(this)" />
              </label>
              <br>
              In REPL-mode you can evaluate individual expression by using the ⌘ (macOS) or Windows key + Enter. The result will appear below.
              <pre><code style="white-space: pre-wrap;max-width:80%;" id="result"></code>
              </pre>
              Compiled code:
              <pre><code style="white-space: pre-wrap;max-width:80%;" id="compiledCode"></code>
              </pre>
      </div>
    </div>
  </body>
</html>