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This commit is contained in:
Michael Zhang 2022-01-03 17:14:54 -06:00
commit b089105102
Signed by: michael
GPG key ID: BDA47A31A3C8EE6B
19 changed files with 1306 additions and 0 deletions
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node_modules

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bundle.js

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{
useTabs: false,
tabWidth: 2,
singleQuote: false,
trailingComma: "all",
printWidth: 100,
}

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(() => {
// src/constants.ts
var PI = Math.PI;
var TAU = 2 * PI;
var DEFAULT_DOT_RADIUS = 0.08;
// src/mobject/geometry.ts
var Arc = class {
constructor(radius, startAngle, angle) {
this.radius = radius;
this.startAngle = startAngle;
this.angle = angle;
}
};
var Circle = class extends Arc {
constructor(radius) {
super(radius, 0, TAU);
}
};
var Dot = class extends Circle {
constructor(radius) {
super(radius != null ? radius : DEFAULT_DOT_RADIUS);
}
};
// src/renderer/index.ts
var Canvas2DRenderer = class {
constructor(context) {
this.context = context;
this.skipAnimations = false;
this.animationStartTime = new Date();
this.animationElapsedTime = 0;
}
init_scene(scene) {
}
render(scene) {
this.updateFrame(scene);
if (this.skipAnimations)
return;
for (let mobject of scene.mobjects) {
if (!mobject.shouldRender)
continue;
this.renderMobject(mobject);
}
}
renderMobject(mobject) {
}
updateFrame(scene) {
for (let mobject of scene.mobjects) {
if (!mobject.shouldRender)
continue;
this.renderMobject(mobject);
}
this.animationElapsedTime = +new Date() - +this.animationStartTime;
}
};
// src/scene/index.ts
var Scene = class {
constructor() {
this.animations = [];
this.mobjects = [];
}
construct() {
}
add(...mobjects) {
this.mobjects.push(...mobjects);
}
};
// src/utils/tex.ts
function texToSvg(expression) {
let el2 = MathJax.tex2svg(expression);
let child = el2.children[0];
return child.innerHTML;
}
// src/index.ts
function init(scene, el2) {
let canvasEl = document.createElement("canvas");
canvasEl.width = 640;
canvasEl.height = 480;
let contextOrNull = canvasEl.getContext("2d");
if (contextOrNull == null)
return;
let context = contextOrNull;
let renderer = new Canvas2DRenderer(context);
let lastTime;
let step = function(time) {
let timeDelta = time - (lastTime != null ? lastTime : 0);
renderer.render(scene);
requestAnimationFrame(step);
lastTime = time;
};
requestAnimationFrame(step);
el2.appendChild(canvasEl);
}
var ExampleScene = class extends Scene {
construct() {
let dot = new Dot([-2, -1, 0]);
let dot2 = new Dot([2, 1, 0]);
let line = new Line(dot.getCenter(), dot2.getCenter());
let b1 = new Brace(line);
this.add(line, dot, dot2);
}
};
texToSvg("x + 1");
var el = document.getElementById("manim");
if (el)
init(new ExampleScene(), el);
})();
//# sourceMappingURL=bundle.js.map

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{
"version": 3,
"sources": ["src/constants.ts", "src/mobject/geometry.ts", "src/renderer/index.ts", "src/scene/index.ts", "src/utils/tex.ts", "src/index.ts"],
"sourcesContent": ["export const PI = Math.PI;\nexport const TAU = 2 * PI;\n\nexport const DEFAULT_DOT_RADIUS = 0.08;\n", "import { DEFAULT_DOT_RADIUS, TAU } from \"../constants\";\n\nexport class Arc {\n constructor(public radius: number, public startAngle: number, public angle: number) {}\n}\n\nexport class Circle extends Arc {\n constructor(radius: number) {\n super(radius, 0, TAU);\n }\n}\n\nexport class Dot extends Circle {\n constructor(radius?: number) {\n super(radius ?? DEFAULT_DOT_RADIUS);\n }\n}\n", "import { Mobject } from \"../mobject\";\nimport { Scene } from \"../scene\";\n\nexport class Canvas2DRenderer {\n context: CanvasRenderingContext2D;\n\n skipAnimations: boolean;\n animationStartTime: Date;\n animationElapsedTime: number;\n\n constructor(context: CanvasRenderingContext2D) {\n this.context = context;\n\n this.skipAnimations = false;\n this.animationStartTime = new Date();\n this.animationElapsedTime = 0;\n }\n\n init_scene(scene: Scene) {}\n\n public render(scene: Scene) {\n this.updateFrame(scene);\n if (this.skipAnimations) return;\n\n for (let mobject of scene.mobjects) {\n if (!mobject.shouldRender) continue;\n this.renderMobject(mobject);\n }\n }\n\n renderMobject(mobject: Mobject) {\n // for (let shaderWrapper of mobject.getShaderWrapperList()) {\n // let mesh = new Mesh();\n // }\n }\n\n updateFrame(scene: Scene) {\n for (let mobject of scene.mobjects) {\n if (!mobject.shouldRender) continue;\n this.renderMobject(mobject);\n }\n\n this.animationElapsedTime = +new Date() - +this.animationStartTime;\n }\n}\n", "import { Animation } from \"../animation\";\nimport { Mobject } from \"../mobject\";\n\nexport class Scene {\n animations: Animation[];\n mobjects: Mobject[];\n\n constructor() {\n this.animations = [];\n this.mobjects = [];\n }\n\n public construct() {}\n\n /**\n * Add Mobjects to this scene, from background to foreground in the order\n * they're added.\n */\n public add(...mobjects: Mobject[]) {\n this.mobjects.push(...mobjects);\n }\n}\n", "declare namespace MathJax {\n function tex2svg(expression: string): HTMLElement;\n};\n\n/**\n * Convert TeX expression to an SVG string.\n */\nexport function texToSvg(expression: string): string {\n let el = <HTMLElement>MathJax.tex2svg(expression);\n let child = <SVGElement>el.children[0];\n return child.innerHTML;\n}\n", "import { Dot } from \"./mobject/geometry\";\nimport { Canvas2DRenderer } from \"./renderer\";\nimport { Scene } from \"./scene\";\nimport { texToSvg } from \"./utils/tex\";\n\nexport function init(scene: Scene, el: HTMLElement) {\n let canvasEl = document.createElement(\"canvas\");\n canvasEl.width = 640;\n canvasEl.height = 480;\n\n let contextOrNull = canvasEl.getContext(\"2d\");\n if (contextOrNull == null) return;\n let context = contextOrNull;\n\n let renderer = new Canvas2DRenderer(context);\n\n let lastTime: DOMHighResTimeStamp | null;\n let step = function (time: DOMHighResTimeStamp): void {\n let timeDelta = time - (lastTime ?? 0);\n renderer.render(scene);\n requestAnimationFrame(step);\n lastTime = time;\n };\n requestAnimationFrame(step);\n\n el.appendChild(canvasEl);\n}\n\nclass ExampleScene extends Scene {\n override construct() {\n let dot = new Dot([-2, -1, 0]);\n let dot2 = new Dot([2, 1, 0]);\n let line = new Line(dot.getCenter(), dot2.getCenter());\n let b1 = new Brace(line);\n this.add(line, dot, dot2);\n }\n}\n\ntexToSvg(\"x + 1\");\n\nlet el = document.getElementById(\"manim\");\nif (el) init(new ExampleScene(), el);\n"],
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
</head>
<body>
<div id="manim"></div>
<script
src="https://unpkg.com/mathjax@3.2.0/es5/tex-svg-full.js"
integrity="sha384-k13NcpPC0V9zRQ24+/m6CeP5t+OvYNPGQLGj5pY3t64DU6SutAI3bf3w6GLeS/Xv"
crossorigin="anonymous"
></script>
<script type="text/javascript" src="bundle.js"></script>
</body>
</html>

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17
package.json Normal file
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{
"scripts": {
"build": "esbuild src/index.ts --bundle --external:mathjax-full --sourcemap --outfile=bundle.js",
"pretty": "prettier --write --list-different ."
},
"dependencies": {
"mathjax-full": "^3.2.0",
"rollup": "^2.62.0"
},
"devDependencies": {
"@rollup/plugin-node-resolve": "^13.1.2",
"@rollup/plugin-typescript": "^8.3.0",
"esbuild": "^0.14.10",
"prettier": "^2.5.1",
"typescript": "^4.5.4"
}
}

3
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import { Animation } from ".";
export class DrawBorderThenFill extends Animation {}

14
src/animation/index.ts Normal file
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import { Mobject } from "../mobject";
export const DEFAULT_ANIMATION_RUN_TIME = 1.0;
export const DEFAULT_ANIMATION_LAG_RATIO = 0.0;
export class Animation {
mobject: Mobject | null;
runTime: number;
constructor(runTime: number = DEFAULT_ANIMATION_RUN_TIME) {
this.mobject = null;
this.runTime = runTime;
}
}

4
src/constants.ts Normal file
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export const PI = Math.PI;
export const TAU = 2 * PI;
export const DEFAULT_DOT_RADIUS = 0.08;

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import { Dot } from "./mobject/geometry";
import { Point } from "./point";
import { Canvas2DRenderer } from "./renderer";
import { Scene } from "./scene";
import { texToSvg } from "./utils/tex";
export function init(scene: Scene, el: HTMLElement) {
let canvasEl = document.createElement("canvas");
canvasEl.width = 640;
canvasEl.height = 480;
let contextOrNull = canvasEl.getContext("2d");
if (contextOrNull == null) return;
let context = contextOrNull;
let renderer = new Canvas2DRenderer(context);
let lastTime: DOMHighResTimeStamp | null;
let step = function (time: DOMHighResTimeStamp): void {
let timeDelta = time - (lastTime ?? 0);
renderer.render(scene);
requestAnimationFrame(step);
lastTime = time;
};
requestAnimationFrame(step);
el.appendChild(canvasEl);
}
class ExampleScene extends Scene {
override construct() {
let dot = new Dot(new Point(-2, -1));
let dot2 = new Dot(new Point(2, 1));
let line = new Line(dot.getCenter(), dot2.getCenter());
let b1 = new Brace(line);
this.add(line, dot, dot2);
}
}
let el = document.getElementById("manim");
if (el) init(new ExampleScene(), el);

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import { DEFAULT_DOT_RADIUS, TAU } from "../constants";
import { Point } from "./primitive";
export class Arc {
constructor(
public center: Point,
public radius: number,
public startAngle: number,
public angle: number,
) {}
}
export class Circle extends Arc {
constructor(center: Point, radius: number) {
super(center, radius, 0, TAU);
}
}
export class Dot extends Circle {
constructor(point: Point, radius?: number) {
super(point, radius ?? DEFAULT_DOT_RADIUS);
}
}
export class Line {
constructor(a: Point, b: Point) {
}
}

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src/mobject/index.ts Normal file
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import {Point} from "../point";
export class Path {
constructor(public points: Point[]) {}
}
export class Mobject {
submobjects: Mobject[];
shouldRender: boolean;
paths: Path[];
constructor(paths: Path[] = []) {
this.submobjects = [];
this.shouldRender = true;
this.paths = paths;
}
}

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src/mobject/primitive.ts Normal file
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export abstract class Primitive {}
export class Point extends Primitive {
constructor(public x: number, public y: number) { super(); }
}

46
src/renderer/index.ts Normal file
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import { Mobject } from "../mobject";
import { Scene } from "../scene";
export class Canvas2DRenderer {
context: CanvasRenderingContext2D;
skipAnimations: boolean;
animationStartTime: Date;
animationElapsedTime: number;
constructor(context: CanvasRenderingContext2D) {
this.context = context;
this.skipAnimations = false;
this.animationStartTime = new Date();
this.animationElapsedTime = 0;
}
init_scene(scene: Scene) {}
public render(scene: Scene) {
this.updateFrame(scene);
if (this.skipAnimations) return;
for (let mobject of scene.mobjects) {
if (!mobject.shouldRender) continue;
this.renderMobject(mobject);
}
}
renderMobject(mobject: Mobject) {
for (let path of mobject.paths) {
this.context.beginPath();
let first = true;
for (let point of path.points) {
if (first) this.context.moveTo(point.x, point.y);
else this.context.lineTo(point.x, point.y);
}
this.context.stroke();
}
}
updateFrame(scene: Scene) {
this.animationElapsedTime = +new Date() - +this.animationStartTime;
}
}

22
src/scene/index.ts Normal file
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import { Animation } from "../animation";
import { Mobject } from "../mobject";
export abstract class Scene {
animations: Animation[];
mobjects: Mobject[];
constructor() {
this.animations = [];
this.mobjects = [];
}
public abstract construct(): void;
/**
* Add Mobjects to this scene, from background to foreground in the order
* they're added.
*/
public add(...mobjects: Mobject[]) {
this.mobjects.push(...mobjects);
}
}

12
src/utils/tex.ts Normal file
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declare namespace MathJax {
function tex2svg(expression: string): HTMLElement;
}
/**
* Convert TeX expression to an SVG string.
*/
export function texToSvg(expression: string): string {
let el = <HTMLElement>MathJax.tex2svg(expression);
let child = <SVGElement>el.children[0];
return child.innerHTML;
}

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tsconfig.json Normal file
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@ -0,0 +1,14 @@
{
"compilerOptions": {
"target": "es2018",
"module": "esnext",
"moduleResolution": "node",
"noEmitOnError": true,
"lib": ["es2017", "dom"],
"strict": true,
"esModuleInterop": false,
"outDir": "out-tsc",
"rootDir": "./"
},
"include": ["./src/**/*.ts"]
}