bundle.js

/* oak build --web */
// module system
const __Oak_Modules = {};
let __Oak_Import_Aliases;
function __oak_modularize(name, fn) {
	__Oak_Modules[name] = fn;
}
function __oak_module_import(name) {
	if (typeof __Oak_Modules[name] === 'object') return __Oak_Modules[name];
	const module = __Oak_Modules[name] || __Oak_Modules[__Oak_Import_Aliases[name]];
	if (module) {
		__Oak_Modules[name] = {}; // break circular imports
		return __Oak_Modules[name] = module();
	} else {
		throw new Error(`Could not import Oak module "${name}" at runtime`);
	}
}

// language primitives
let __oak_empty_assgn_tgt;
function __oak_eq(a, b) {
	if (a === __Oak_Empty || b === __Oak_Empty) return true;

	// match either null or undefined to compare correctly against undefined ?s
	// appearing in places like optional arguments
	if (a == null && b == null) return true;
	if (a == null || b == null) return false;

	// match all other types that can be compared cheaply (without function
	// calls for type coercion or recursive descent)
	if (typeof a === 'boolean' || typeof a === 'number' ||
		typeof a === 'symbol' || typeof a === 'function') {
		return a === b;
	}

	// string equality check
	a = __as_oak_string(a);
	b = __as_oak_string(b);
	if (typeof a !== typeof b) return false;
	if (__is_oak_string(a) && __is_oak_string(b)) {
		return a.valueOf() === b.valueOf();
	}

	// deep equality check for composite values
	if (len(a) !== len(b)) return false;
	for (const key of keys(a)) {
		if (!__oak_eq(a[key], b[key])) return false;
	}
	return true;
}
function __oak_acc(tgt, prop) {
	return (__is_oak_string(tgt) ? __as_oak_string(tgt.valueOf()[prop]) : tgt[prop]) ?? null;
}
function __oak_obj_key(x) {
	return typeof x === 'symbol' ? Symbol.keyFor(x) : x;
}
function __oak_push(a, b) {
	a = __as_oak_string(a);
	a.push(b);
	return a;
}
function __oak_and(a, b) {
	if (typeof a === 'boolean' && typeof b === 'boolean') {
		return a && b;
	}
	if (__is_oak_string(a) && __is_oak_string(b)) {
		const max = Math.max(a.length, b.length);
		const get = (s, i) => s.valueOf().charCodeAt(i) || 0;

		let res = '';
		for (let i = 0; i < max; i ++) {
			res += String.fromCharCode(get(a, i) & get(b, i));
		}
		return res;
	}
	return a & b;
}
function __oak_or(a, b) {
	if (typeof a === 'boolean' && typeof b === 'boolean') {
		return a || b;
	}
	if (__is_oak_string(a) && __is_oak_string(b)) {
		const max = Math.max(a.length, b.length);
		const get = (s, i) => s.valueOf().charCodeAt(i) || 0;

		let res = '';
		for (let i = 0; i < max; i ++) {
			res += String.fromCharCode(get(a, i) | get(b, i));
		}
		return res;
	}
	return a | b;
}
function __oak_xor(a, b) {
	if (typeof a === 'boolean' && typeof b === 'boolean') {
		return (a && !b) || (!a && b);
	}
	if (__is_oak_string(a) && __is_oak_string(b)) {
		const max = Math.max(a.length, b.length);
		const get = (s, i) => s.valueOf().charCodeAt(i) || 0;

		let res = '';
		for (let i = 0; i < max; i ++) {
			res += String.fromCharCode(get(a, i) ^ get(b, i));
		}
		return res;
	}
	return a ^ b;
}
const __Oak_Empty = Symbol('__Oak_Empty');

// mutable string type
function __is_oak_string(x) {
	if (x == null) return false;
	return x.__mark_oak_string;
}
function __as_oak_string(x) {
	if (typeof x === 'string') return __Oak_String(x);
	return x;
}
const __Oak_String = s => {
	return {
		__mark_oak_string: true,
		assign(i, slice) {
			if (i === s.length) return s += slice;
			return s = s.substr(0, i) + slice + s.substr(i + slice.length);
		},
		push(slice) {
			s += slice;
		},
		toString() {
			return s;
		},
		valueOf() {
			return s;
		},
		get length() {
			return s.length;
		},
	}
}

// tail recursion trampoline helpers
function __oak_resolve_trampoline(fn, ...args) {
	let rv = fn(...args);
	while (rv && rv.__is_oak_trampoline) {
		rv = rv.fn(...rv.args);
	}
	return rv;
}
function __oak_trampoline(fn, ...args) {
	return {
		__is_oak_trampoline: true,
		fn: fn,
		args: args,
	}
}

// env (builtin) functions

// reflection and types
const __Is_Oak_Node = typeof process === 'object';
const __Oak_Int_RE = /^[+-]?\d+$/;
function int(x) {
	x = __as_oak_string(x);
	if (typeof x === 'number') {
		// JS rounds towards higher magnitude, Oak rounds towards higher value
		const rounded = Math.floor(x);
		const diff = x - rounded;
		if (x < 0 && diff === 0.5) return rounded + 1;
		return rounded;
	}
	if (__is_oak_string(x) && __Oak_Int_RE.test(x.valueOf())) {
		const i = Number(x.valueOf());
		if (isNaN(i)) return null;
		return i;
	}
	return null;
}
function float(x) {
	x = __as_oak_string(x);
	if (typeof x === 'number') return x;
	if (__is_oak_string(x)) {
		const f = parseFloat(x.valueOf());
		if (isNaN(f)) return null;
		return f;
	}
	return null;
}
function atom(x) {
	x = __as_oak_string(x);
	if (typeof x === 'symbol' && x !== __Oak_Empty) return x;
	if (__is_oak_string(x)) return Symbol.for(x.valueOf());
	return Symbol.for(string(x));
}
function string(x) {
	x = __as_oak_string(x);
	function display(x) {
		x = __as_oak_string(x);
		if (__is_oak_string(x)) {
			return '\'' + x.valueOf().replace('\\', '\\\\').replace('\'', '\\\'') + '\'';
		} else if (typeof x === 'symbol') {
			if (x === __Oak_Empty) return '_';
			return ':' + Symbol.keyFor(x);
		}
		return string(x);
	}
	if (x == null) {
		return '?';
	} else if (typeof x === 'number') {
		return x.toString();
	} else if (__is_oak_string(x)) {
		return x;
	} else if (typeof x === 'boolean') {
		return x.toString();
	} else if (typeof x === 'function') {
		return x.toString();
	} else if (typeof x === 'symbol') {
		if (x === __Oak_Empty) return '_';
		return Symbol.keyFor(x);
	} else if (Array.isArray(x)) {
		return '[' + x.map(display).join(', ') + ']';
	} else if (typeof x === 'object') {
		const entries = [];
		for (const key of keys(x).sort()) {
			entries.push(`${key}: ${display(x[key])}`);
		}
		return '{' + entries.join(', ') + '}';
	}
	throw new Error('string() called on unknown type ' + x.toString());
}
function codepoint(c) {
	c = __as_oak_string(c);
	return c.valueOf().charCodeAt(0);
}
function char(n) {
	return String.fromCharCode(n);
}
function type(x) {
	x = __as_oak_string(x);
	if (x == null) {
		return Symbol.for('null');
	} else if (typeof x === 'number') {
		// Many discrete APIs check for :int, so we consider all integer
		// numbers :int and fall back to :float. This is not an airtight
		// solution, but works well enough and the alternative (tagged number
		// values/types) have poor perf tradeoffs.
		if (Number.isInteger(x)) return Symbol.for('int');
		return Symbol.for('float');
	} else if (__is_oak_string(x)) {
		return Symbol.for('string');
	} else if (typeof x === 'boolean') {
		return Symbol.for('bool');
	} else if (typeof x === 'symbol') {
		if (x === __Oak_Empty) return Symbol.for('empty');
		return Symbol.for('atom');
	} else if (typeof x === 'function') {
		return Symbol.for('function');
	} else if (Array.isArray(x)) {
		return Symbol.for('list');
	} else if (typeof x === 'object') {
		return Symbol.for('object');
	}
	throw new Error('type() called on unknown type ' + x.toString());
}
function len(x) {
	if (typeof x === 'string' || __is_oak_string(x) || Array.isArray(x)) {
		return x.length;
	} else if (typeof x === 'object' && x !== null) {
		return Object.getOwnPropertyNames(x).length;
	}
	throw new Error('len() takes a string or composite value, but got ' + string(x));
}
function keys(x) {
	if (Array.isArray(x)) {
		const k = [];
		for (let i = 0; i < x.length; i ++) k.push(i);
		return k;
	} else if (typeof x === 'object' && x !== null) {
		return Object.getOwnPropertyNames(x).map(__as_oak_string);
	}
	throw new Error('keys() takes a composite value, but got ' + string(x).valueOf());
}

// OS interfaces
function args() {
	if (__Is_Oak_Node) return process.argv.map(__as_oak_string);
	return [window.location.href];
}
function env() {
	if (__Is_Oak_Node) {
		const e = Object.assign({}, process.env);
		for (const key in e) {
			e[key] = __as_oak_string(e[key]);
		}
		return e;
	}
	return {};
}
function time() {
	return Date.now() / 1000;
}
function nanotime() {
	return int(Date.now() * 1000000);
}
function rand() {
	return Math.random();
}
let randomBytes;
function srand(length) {
	if (__Is_Oak_Node) {
		// lazily import dependency
		if (!randomBytes) randomBytes = require('crypto').randomBytes;
		return randomBytes(length).toString('latin1');
	}

	const bytes = crypto.getRandomValues(new Uint8Array(length));
	return __as_oak_string(Array.from(bytes).map(b => String.fromCharCode(b)).join(''));
}
function wait(duration, cb) {
	setTimeout(cb, duration * 1000);
	return null;
}
function exit(code) {
	if (__Is_Oak_Node) process.exit(code);
	return null;
}
function exec() {
	throw new Error('exec() not implemented');
}

// I/O
function input() {
	throw new Error('input() not implemented');
}
function print(s) {
	s = __as_oak_string(s);
	if (__Is_Oak_Node) {
		process.stdout.write(string(s).toString());
	} else {
		console.log(string(s).toString());
	}
	return s.length;
}
function ls() {
	throw new Error('ls() not implemented');
}
function rm() {
	throw new Error('rm() not implemented');
}
function mkdir() {
	throw new Error('mkdir() not implemented');
}
function stat() {
	throw new Error('stat() not implemented');
}
function open() {
	throw new Error('open() not implemented');
}
function close() {
	throw new Error('close() not implemented');
}
function read() {
	throw new Error('read() not implemented');
}
function write() {
	throw new Error('write() not implemented');
}
function listen() {
	throw new Error('listen() not implemented');
}
function req() {
	throw new Error('req() not implemented');
}

// math
function sin(n) {
	return Math.sin(n);
}
function cos(n) {
	return Math.cos(n);
}
function tan(n) {
	return Math.tan(n);
}
function asin(n) {
	return Math.asin(n);
}
function acos(n) {
	return Math.acos(n);
}
function atan(n) {
	return Math.atan(n);
}
function pow(b, n) {
	return Math.pow(b, n);
}
function log(b, n) {
	return Math.log(n) / Math.log(b);
}

// runtime
function ___runtime_lib() {
	throw new Error('___runtime_lib() not implemented');
}
function ___runtime_lib__oak_qm() {
	throw new Error('___runtime_lib?() not implemented');
}
function ___runtime_gc() {
	throw new Error('___runtime_gc() not implemented');
}
function ___runtime_mem() {
	throw new Error('___runtime_mem() not implemented');
}

// JavaScript interop
function call(target, fn, ...args) {
	return target[Symbol.keyFor(fn)](...args);
}
function __oak_js_new(Constructor, ...args) {
	return new Constructor(...args);
}
function __oak_js_try(fn) {
	try {
		return {
			type: Symbol.for('ok'),
			ok: fn(),
		}
	} catch (e) {
		return {
			type: Symbol.for('error'),
			error: e,
		}
	}
}
(__oak_modularize(__Oak_String(``),function _(){return ((BurdPopulation,Burds,Canvas,Ctx,DPI,DrawHeight,DrawWidth,FootprintTrail,Footprints,JumpDistance,JumpDuration,JumpHeight,MaxScale,angle,append,arcBetween,__oak_js_default,draw,drawBurd,drawFootprint,drawShadow,each,ellipse,filter,handleResize,jumpRandomBurd,line,map,math,merge,midJumpBurd,normAngle,println,random,range,slice,sort,squish,startDrawing,startJumping)=>(({println,__oak_js_default,range,slice,map,each,merge,filter,append}=__oak_module_import(__Oak_String(`std`))),(math=__oak_module_import(__Oak_String(`math`))),(sort=__oak_module_import(__Oak_String(`sort`))),(random=__oak_module_import(__Oak_String(`random`))),(DPI=__oak_js_default((window.devicePixelRatio??null),1)),(MaxScale=5),(JumpDuration=0.25),(JumpHeight=0.5),(JumpDistance=12),(FootprintTrail=8),(DrawWidth=(window.innerWidth??null)),(DrawHeight=(window.innerHeight??null)),(Canvas=(document.querySelector)(__Oak_String(`canvas`))),(Ctx=(Canvas.getContext)(__Oak_String(`2d`))),angle=function angle(deg=null){return ((deg/180)*(math.Pi??null))},normAngle=function normAngle(t=null){return ((__as_oak_string(t+(2*(math.Pi??null))))%((2*(math.Pi??null))))},squish=function squish(point=null,center=null,t=null){return ((cx,cy,x,y)=>(([x=null,y=null]=point),([cx=null,cy=null]=center),[__as_oak_string(cx+(((x-cx))*cos(t))),__as_oak_string(cy+(((y-cy))*(__as_oak_string(1+(0.9*(math.abs)(sin(t)))))))]))()},line=function line(start=null,end=null){return ((Ctx.beginPath)(),(Ctx.moveTo)(__oak_acc(start,0),__oak_acc(start,1)),(Ctx.lineTo)(__oak_acc(end,0),__oak_acc(end,1)),(Ctx.stroke)())},ellipse=function ellipse(center=null,rx=null,ry=null){return ((Ctx.beginPath)(),(Ctx.ellipse)(__oak_acc(center,0),__oak_acc(center,1),rx,ry,0,0,(2*(math.Pi??null))),(Ctx.fill)())},arcBetween=function arcBetween(start=null,end=null,radius=null,dir=null,mode=null){return ((arcdist,cx,cy,dist,endAngle,epsilon,startAngle,u,v)=>((epsilon=((__oak_cond)=>__oak_eq(__oak_cond,Symbol.for('counterclock'))?1:__oak_eq(__oak_cond,Symbol.for('clock'))?-1:null)(dir)),(dist=(math.hypot)(__oak_acc(start,0),__oak_acc(start,1),__oak_acc(end,0),__oak_acc(end,1))),(arcdist=(math.sqrt)(((radius*radius)-((dist*dist)/4)))),(u=(((__oak_acc(end,0)-__oak_acc(start,0)))/dist)),(v=(((__oak_acc(end,1)-__oak_acc(start,1)))/dist)),(cx=(((__as_oak_string(__oak_acc(start,0)+__oak_acc(end,0)))/2)-((epsilon*arcdist)*v))),(cy=__as_oak_string(((__as_oak_string(__oak_acc(start,1)+__oak_acc(end,1)))/2)+((epsilon*arcdist)*u))),(startAngle=(math.orient)(cx,cy,__oak_acc(start,0),__oak_acc(start,1))),(endAngle=(math.orient)(cx,cy,__oak_acc(end,0),__oak_acc(end,1))),(Ctx.beginPath)(),((__oak_cond)=>__oak_eq(__oak_cond,Symbol.for('counterclock'))?(Ctx.arc)(cx,cy,radius,startAngle,endAngle):__oak_eq(__oak_cond,Symbol.for('clock'))?(Ctx.arc)(cx,cy,radius,endAngle,startAngle):null)(dir),((__oak_cond)=>__oak_eq(__oak_cond,Symbol.for('fill'))?(Ctx.fill)():__oak_eq(__oak_cond,Symbol.for('stroke'))?(Ctx.stroke)():null)(mode)))()},drawFootprint=function drawFootprint(fp=null){return ((FpRadius,Scale,legSpan)=>((Scale=(((fp.y??null)/DrawHeight)*MaxScale)),(FpRadius=(1*Scale)),(legSpan=(1.5*Scale)),ellipse([__as_oak_string((fp.x??null)+legSpan),(fp.y??null)],FpRadius,(FpRadius/2)),ellipse([((fp.x??null)-legSpan),(fp.y??null)],FpRadius,(FpRadius/2))))()},drawShadow=function drawShadow(burd=null){return ((Scale,dir,shadowRadiusX,shadowRadiusY,x,y,z)=>(({x,y,z,direction:dir=null}=burd),(Scale=((y/DrawHeight)*MaxScale)),(shadowRadiusX=((4*Scale)*(__as_oak_string(1+(0.5*(math.abs)(cos(dir))))))),(shadowRadiusY=(2*Scale)),ellipse([x,(y-z)],shadowRadiusX,shadowRadiusY)))()},drawBurd=function drawBurd(burd=null){return ((Scale,attitude,bodyCenter,bodyHalfLength,clockBodyRadius,color,counterclockBodyRadius,dir,facing,flatBellyRadius,headAtt,headEnd,headLength,headPoint,legLength,legSpan,midBellyRadius,roundBellyRadius,tailPoint,x,y,z)=>(({x,y,z,direction:dir=null,color}=burd),(Scale=((math.scale)(y,0,DrawHeight,0.1,1)*MaxScale)),(facing=((__oak_cond)=>__oak_eq(__oak_cond,(dir<angle(70)))?Symbol.for('east'):__oak_eq(__oak_cond,(dir>angle((360-70))))?Symbol.for('east'):__oak_eq(__oak_cond,(dir<angle((180-70))))?Symbol.for('north'):__oak_eq(__oak_cond,(dir<angle(__as_oak_string(180+70))))?Symbol.for('west'):Symbol.for('south'))(true)),(legSpan=(1.5*Scale)),(legLength=(6*Scale)),(bodyCenter=[__as_oak_string(x+((__oak_cond)=>__oak_eq(__oak_cond,Symbol.for('east'))?(-1*Scale):__oak_eq(__oak_cond,Symbol.for('west'))?(1*Scale):0)(facing)),(y-(11*Scale))]),(bodyHalfLength=(8*Scale)),(attitude=angle(30)),(headPoint=squish((math.bearing)(__oak_acc(bodyCenter,0),__oak_acc(bodyCenter,1),bodyHalfLength,-attitude),bodyCenter,dir)),(tailPoint=squish((math.bearing)(__oak_acc(bodyCenter,0),__oak_acc(bodyCenter,1),bodyHalfLength,__as_oak_string(-attitude+(math.Pi??null))),bodyCenter,dir)),(headLength=(8*Scale)),(headAtt=((__oak_cond)=>__oak_eq(__oak_cond,Symbol.for('east'))?angle(-30):__oak_eq(__oak_cond,Symbol.for('west'))?angle(__as_oak_string(180+30)):((__oak_cond)=>__oak_eq(__oak_cond,(dir<angle(90)))?angle(-10):__oak_eq(__oak_cond,(dir>angle(270)))?angle(-10):angle(__as_oak_string(180+10)))(true))(facing)),(headEnd=(math.bearing)(__oak_acc(headPoint,0),__oak_acc(headPoint,1),headLength,-headAtt)),(roundBellyRadius=(8.75*Scale)),(flatBellyRadius=(25*Scale)),(midBellyRadius=(10.5*Scale)),([clockBodyRadius=null,counterclockBodyRadius=null]=((__oak_cond)=>__oak_eq(__oak_cond,Symbol.for('east'))?[flatBellyRadius,roundBellyRadius]:__oak_eq(__oak_cond,Symbol.for('west'))?[roundBellyRadius,flatBellyRadius]:[midBellyRadius,midBellyRadius])(facing)),Symbol.for('legs'),(((__oak_assgn_tgt,__oak_assgn_val)=>(__is_oak_string(__oak_assgn_tgt)?__oak_assgn_tgt.assign(lineWidth,__oak_assgn_val):__oak_assgn_val===__Oak_Empty?delete (__oak_assgn_tgt.lineWidth):(__oak_assgn_tgt.lineWidth)=__oak_assgn_val,__oak_assgn_tgt))(__as_oak_string(Ctx),(Scale/2)),line([__as_oak_string(x+legSpan),y],[__as_oak_string(x+legSpan),(y-legLength)]),line([(x-legSpan),y],[(x-legSpan),(y-legLength)])),Symbol.for('body'),(((__oak_assgn_tgt,__oak_assgn_val)=>(__is_oak_string(__oak_assgn_tgt)?__oak_assgn_tgt.assign(fillStyle,__oak_assgn_val):__oak_assgn_val===__Oak_Empty?delete (__oak_assgn_tgt.fillStyle):(__oak_assgn_tgt.fillStyle)=__oak_assgn_val,__oak_assgn_tgt))(__as_oak_string(Ctx),color),arcBetween(headPoint,tailPoint,clockBodyRadius,Symbol.for('clock'),Symbol.for('fill')),arcBetween(headPoint,tailPoint,counterclockBodyRadius,Symbol.for('counterclock'),Symbol.for('fill')),arcBetween(headPoint,tailPoint,clockBodyRadius,Symbol.for('clock'),Symbol.for('stroke')),arcBetween(headPoint,tailPoint,counterclockBodyRadius,Symbol.for('counterclock'),Symbol.for('stroke'))),Symbol.for('head'),(line(headPoint,headEnd))))()},midJumpBurd=function midJumpBurd(burd=null){return ((Scale,c,color,destX,destY,dir,jumpY,jumped,movingX,movingY,t,x,y)=>(({x,y,direction:dir=null,jumped,color}=burd),(Scale=((y/DrawHeight)*MaxScale)),(t=(math.scale)(time(),jumped,__as_oak_string(jumped+JumpDuration))),([destX=null,destY=null]=(math.bearing)(x,y,(JumpDistance*Scale),-dir)),(c=((((4*JumpHeight)*Scale)/JumpDuration)/JumpDuration)),(jumpY=((c*t)*((t-1)))),(movingX=(math.scale)(t,0,1,x,destX)),(movingY=__as_oak_string((math.scale)(t,0,1,y,destY)+jumpY)),({x:movingX,y:movingY,z:jumpY,direction:dir,color})))()},draw=function draw(){return ((JumpedBurds)=>((Ctx.setTransform)(DPI,0,0,DPI,0,0),(Ctx.clearRect)(0,0,(Canvas.width??null),(Canvas.height??null)),((__oak_assgn_tgt,__oak_assgn_val)=>(__is_oak_string(__oak_assgn_tgt)?__oak_assgn_tgt.assign(lineCap,__oak_assgn_val):__oak_assgn_val===__Oak_Empty?delete (__oak_assgn_tgt.lineCap):(__oak_assgn_tgt.lineCap)=__oak_assgn_val,__oak_assgn_tgt))(__as_oak_string(Ctx),__Oak_String(`round`)),((__oak_assgn_tgt,__oak_assgn_val)=>(__is_oak_string(__oak_assgn_tgt)?__oak_assgn_tgt.assign(lineJoin,__oak_assgn_val):__oak_assgn_val===__Oak_Empty?delete (__oak_assgn_tgt.lineJoin):(__oak_assgn_tgt.lineJoin)=__oak_assgn_val,__oak_assgn_tgt))(__as_oak_string(Ctx),__Oak_String(`round`)),((__oak_assgn_tgt,__oak_assgn_val)=>(__is_oak_string(__oak_assgn_tgt)?__oak_assgn_tgt.assign(strokeStyle,__oak_assgn_val):__oak_assgn_val===__Oak_Empty?delete (__oak_assgn_tgt.strokeStyle):(__oak_assgn_tgt.strokeStyle)=__oak_assgn_val,__oak_assgn_tgt))(__as_oak_string(Ctx),__Oak_String(`#000000`)),((__oak_assgn_tgt,__oak_assgn_val)=>(__is_oak_string(__oak_assgn_tgt)?__oak_assgn_tgt.assign(fillStyle,__oak_assgn_val):__oak_assgn_val===__Oak_Empty?delete 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