atlas/web/_js/stats.js

/*
	========================================================================
	The 2022 r/place Atlas

	An Atlas of Reddit's 2022 r/place, with information to each
	artwork	of the canvas provided by the community.

	Copyright (c) 2017 Roland Rytz <roland@draemm.li>
	Copyright (c) 2022 Place Atlas contributors

	Licensed under the GNU Affero General Public License Version 3
	https://place-atlas.stefanocoding.me/license.txt
	========================================================================
*/

let areasSum = 0;
const areas = [];

for (let q = 0; q < atlas.length; q++) {

	const path = atlas[q].path;

	let area = 0,
		i,
		j,
		point1,
		point2;

	for (i = 0, j = path.length - 1; i < path.length; j = i, i++) {
		point1 = path[i];
		point2 = path[j];
		area += point1[0] * point2[1];
		area -= point1[1] * point2[0];
	}

	area = Math.abs(area / 2);

	areasSum += area;
	areas.push(area);

	atlas[q].area = area;

}

areas.sort(function (a, b) {
	if (a < b) {
		return -1;
	}
	if (a > b) {
		return 1;
	}
	// a must be equal to b
	return 0;
});

atlas.sort(function (a, b) {
	if (a.area < b.area) {
		return -1;
	}
	if (a.area > b.area) {
		return 1;
	}
	// a must be equal to b
	return 0;
});

const el = document.createElement("canvas");
el.style.position = "absolute";
el.style.top = "0px";
el.style.zIndex = "10000";
const ctx = el.getContext("2d");
el.width = 1600;
el.height = 500;
const steps = 150;
const max = 1500;

let largerThanMax = 0;

for (const i in areas) {
	if (areas[i] > max) {
		largerThanMax++;
	}
}

console.info("There are " + largerThanMax + " entries larger than " + max + ", accounting for " + (largerThanMax / areas.length * 100) + "% of all entries.");
console.info("The largest entry has an area of " + areas[areas.length - 1] + " pixels.");

const counts = [0];
const brackets = [max / steps];

let bracket = 0;

let mostCounts = 0;

for (const i in areas) {
	if (areas[i] > (bracket + 1) * (max / steps)) {
		mostCounts = Math.max(mostCounts, counts[bracket]);
		bracket++;
		if (bracket >= steps) {
			break;
		}
		counts[bracket] = 0;
		brackets[bracket] = (bracket + 1) * (max / steps);
	}
	counts[bracket]++;
}
//console.log(counts);
//console.log(brackets);
//console.log(mostCounts);

ctx.fillStyle = "#FFFFFF";
ctx.fillRect(0, 0, el.width, el.height);
ctx.strokeStyle = "#F5F5F5";

ctx.fillStyle = "#333333";
ctx.font = "15px sans";
ctx.textAlign = "right";
ctx.textBaseline = "middle";

let linesDistance = 1;

for (let i = 0; i <= Math.ceil((mostCounts / linesDistance) / 5) * 5; i++) {
	ctx.beginPath();
	ctx.moveTo(
		50
		, ~~(el.height - 50 - i * (linesDistance / mostCounts) * (el.height - 100)) + 0.5
	);
	ctx.lineTo(
		el.width - 25
		, ~~(el.height - 50 - i * (linesDistance / mostCounts) * (el.height - 100)) + 0.5
	);
	ctx.stroke();
}

ctx.strokeStyle = "#333333";
linesDistance = 5;

for (let i = 0; i <= Math.ceil(mostCounts / linesDistance); i++) {
	ctx.beginPath();
	ctx.moveTo(
		50
		, ~~(el.height - 50 - i * (linesDistance / mostCounts) * (el.height - 100)) + 0.5
	);
	ctx.lineTo(
		el.width - 25
		, ~~(el.height - 50 - i * (linesDistance / mostCounts) * (el.height - 100)) + 0.5
	);
	ctx.stroke();

	ctx.fillText(
		i * linesDistance
		, 40
		, ~~(el.height - 50 - i * (linesDistance / mostCounts) * (el.height - 100)) + 0.5
	);
}

const skip = 2;

ctx.textAlign = "center";
ctx.textBaseline = "hanging";
ctx.font = "10px sans";

let a = 0;
for (let i = 0; i <= counts.length; i++) {
	if (i % skip == 0) {
		let y = 0;
		if (a % 2 == 0) {
			y = ~~(el.height - 30) + 0.5;
		} else {
			y = ~~(el.height - 45) + 0.5;
		}
		a++;
		ctx.beginPath();
		ctx.moveTo(
			~~(((i) / steps) * (el.width - 125) + 75) + 0.5
			, ~~(el.height - 50) + 0.5
		);
		ctx.lineTo(
			~~(((i) / steps) * (el.width - 125) + 75) + 0.5
			, y
		);
		ctx.stroke();

		ctx.fillText(
			(i) * (max / steps)
			, ~~(((i) / steps) * (el.width - 125) + 75) - 0.5
			, y + 5
		);
	}
}

ctx.fillStyle = "#FF0000";
ctx.strokeStyle = "#CC0000";

for (let i = 0; i < counts.length; i++) {
	if (i % 2 == 0) {
		ctx.fillStyle = "#FF0000";
	} else {
		ctx.fillStyle = "#DD0000";
	}

	ctx.fillRect(
		~~((i / steps) * (el.width - 125) + 75)
		, el.height - 50
		, Math.ceil(1 / steps * (el.width - 125))
		, ~~(-(counts[i] / mostCounts) * (el.height - 100))
	);

	/*ctx.beginPath();
	ctx.moveTo(
		 ~~((i/steps)*(el.width-125)+75)+0.5
		,~~(el.height - 50)
	);
	ctx.lineTo(
		 ~~((i/steps)*(el.width-125)+75)+0.5
		,~~(el.height-(counts[i]/mostCounts)*(el.height-100))-50+0.5
	);
	ctx.lineTo(
		 ~~(((i+1)/steps)*(el.width-125)+75)+0.5
		,~~(el.height-(counts[i]/mostCounts)*(el.height-100))-50+0.5
	);
	ctx.lineTo(
		 ~~(((i+1)/steps)*(el.width-125)+75)+0.5
		,~~(el.height - 50)
	);
	ctx.stroke();*/
}

document.getElementById("wrapper").appendChild(el);

//console.log(areas);

console.info("Median area: " + areas[~~(areas.length / 2)]);

console.info("Average area: " + (areasSum / atlas.length));

const topCount = 50;
console.info("The " + topCount + " largest entries:");

let outstring = "";

for (let i = 0; i < topCount; i++) {
	outstring += ((i + 1) + "|[" + atlas[atlas.length - i - 1].name + "](http://place-atlas.stefanocoding.me/?id=" + atlas[atlas.length - i - 1].id + ")|" + ~~atlas[atlas.length - i - 1].area + "|" + Math.round(atlas[atlas.length - i - 1].area / 100) / 100 + "%\n");
}

console.info(outstring);

atlas.sort(function (a, b) {
	if (a.center[0] < b.center[0]) {
		return -1;
	}
	if (a.center[0] > b.center[0]) {
		return 1;
	}
	// a must be equal to b
	return 0;
});

console.info("Median x: " + atlas[~~(atlas.length / 2)].center[0]);

atlas.sort(function (a, b) {
	if (a.center[1] < b.center[1]) {
		return -1;
	}
	if (a.center[1] > b.center[1]) {
		return 1;
	}
	// a must be equal to b
	return 0;
});

console.info("Median y: " + atlas[~~(atlas.length / 2)].center[1]);