explain xkcd - User contributions [en]

1902: State Borders

2017-10-16T05:54:00Z

SJester: /* Explanation */ Corrected typo

{{comic
| number = 1902
| date = October 13, 2017
| title = State Borders
| image = state_borders.png
| titletext = A schism between the pro-panhandle and anti-panhandle factions eventually led to war, but both sides spent too much time working on their flag designs to actually do much fighting.
}}

==Explanation==

In this comic, graphic designers take control of the United States, but the only thing they do is to change the state and national borders, using primarily aesthetic criteria.

Despite the caption's rather blasé reaction to the graphic designers' master plan, the changes they propose could be rather tumultuous. Many U.S. residents will be made to live in new states, and thus be required to pay different taxes and obey different state laws, and even root for different sports teams. Some particularly unlucky U.S. citizens living in Arizona, New Mexico, Alaska, and Minnesota could be required to file for citizenship in Mexico or Canada if they wish to continue living in their current homes. And aside from the comic implying that the Trump administration has been ousted by the graphic designer regime, there would probably be no other upside to the ensuing international bureaucratic nightmare.

This comic hints at the fact that it is indeed Randall who wants to see these changes made.

{| class="wikitable"
|-
! Proposed change !! Explanation
|-
| Give to Canada || {{w|Minnesota}} has a small northern exclave (the {{w|Northwest Angle}}) which is accessible from the rest of the US only via the {{w| Lake of the Woods}} or by travelling through Canada. The new borders suggest giving this territory to Canada to simplify the state and national border.
|-
| This should be {{w|Wisconsin}} || {{w|Michigan}} is divided into two parts by {{w|Lake Michigan}}. The graphic designers suggest eliminating a boundary line by assigning the upper peninsula of Michigan to Wisconsin. The upper peninsula of Michigan was given to Michigan as part of a compromise to end the {{w|Toledo War}}.
|-
| Move Long Island to NJ or CT, or make it its own state || {{w|Connecticut}} and {{w|New Jersey}} are very close to each other but don't actually border, separated only a few miles by {{w|New York State}}. {{w|Long Island}} is part of New York State, which visibly juts out into the Atlantic (extending so far to the east that it gives New York a maritime border with Rhode Island) and apparently drives graphic designers crazy who see an association with New Jersey or Connecticut or even becoming its own state more logical than being a part of New York State. This would have some issues, not least of which is that Long Island contains two of {{w|New York City}}'s five boroughs ({{w|Brooklyn}} and {{w|Queens}}) and more than half the city's population.
|-
| Align to Grid || Most of the Western states are variations on "Let's have a large box", but there's something a bit irregular about them. Never fear, the Design Team has fixed!
|-
| Clean Up (Maryland/Pennsylvania/Virginia/West Virginia) || Maryland's western panhandle and both of West Virginia's to the east and north would be smoothed out to have nice, straight, shorter lines.
|-
|Enlarge Rhode Island & Delaware || {{w|Rhode Island}} and {{w|Delaware}}, the two {{w|https://en.wikipedia.org/wiki/List_of_U.S._states_and_territories_by_area#Area_by_state.2Fterritory|smallest U.S. states by area}}, are often difficult to make out on a map of the United States.
Expanding Delaware to occupy the entire {{w|Delmarva_Peninsula|Delmarva peninsula}} eliminates some boundary lines the designers apparently consider excessively fiddly, as well as solving another "Michigan" problem, as the "VA" of "Delmarva" refers to its {{w|Eastern Shore of Virginia|Eastern Shore}}, which is separated from the rest of Virginia by the mouth of the Chesapeake Bay.

Expanding Rhode Island eastward would reduce the number of land borders it has to two (one to its west with Connecticut and one to its north with Massachusetts) and make it easier to see on a map.
|-
| If we're going to have a panhandle, why not commit to it? || {{w|Oklahoma}} has a "panhandle" to its west, which is a kind of {{w|Salient (geography)|Salient}}. The obvious fix would be to give it to Texas. In a twist, the graphic designers suggest extending it even further, across the northern parts of {{w|Arizona}} and {{w|New Mexico}}. This would make the {{w|Four Corners Monument}} obsolete, since Arizona and New Mexico would no longer border {{w|Utah}} and {{w|Colorado}} respectively, let alone all four states sharing a corner.
|-
| Fix this thing || The border of {{w|Missouri}} cuts into {{w|Arkansas}}, in the so-called {{w|Missouri Bootheel}}. The Design Team has awarded that piece to {{w|Arkansas}}, straightening the border.
|-
| Unlabelled cleanup at the junction of {{w|Kentucky}}/{{w|Virginia}} || Virginia's western border is shifted east to align it with the borders to the north and south, forming a continuous line along the {{w|Appalachian_Mountains|Appalachians}}.
|-
| Unlabelled cleanup at the junction of {{w|Nevada}}/{{w|Arizona}} || Continue the line of Utah's western border and Arizona's far northwestern border south (replacing part of the {{w|Colorado River}} boundary), transferring part of Arizona's {{w|Mohave_County,_Arizona|Mohave county}} to Nevada.
|-
| Unlabelled cleanup at the junction of {{w|Texas}}/{{w|Oklahoma}}/{{w|Arkansas}}/{{w|Louisiana}} || Square off {{w|Southwest Arkansas}}, and move {{w|Lousiana's}} northwest border to meet up, presumably because square corners are better.
|-
| Clean up (Arizona/New Mexico/Texas) || One of {{w|New Mexico}}'s borders should be extended into a single line. This results in ceding some land to Mexico, having {{w|El Paso}} split across New Mexico and Texas, and Highway 62 alternating between two states.
|-
| Straighten to fix survey errors (Tennessee) || {{w|Tennessee}}'s southern border is supposed to be the 35th parallel north, but due to surveying errors made in the 19th Century the marked border is one mile south of that line. At many times since, Georgia has sought to fix this by various means (at least partly because doing so would net them some rights to the water from the Tennessee River) including bringing its case to the US Supreme Court - with the Design Team in charge, they wouldn't need those lawyers any more. Farther westward, Tennessee's actual southern border suddenly juts south at the Tennessee River between Alabama and Mississippi - again, the Design Team would rather see it smoothed out. Tennessee's northern border with Kentucky has similar hitches that prevent it from being a straight line that the Design Team wants to address.
|-
| Good Curve! Keep (Florida/Georgia/South Carolina) || The only thing the design team likes already about the shape of the US is the shape of the Atlantic coast in northern {{w|Florida}}, Georgia, and {{w|South Carolina}}, as it seems to bend into the US smoothly. Given the curve is the border between land and water, it's good they like it as changing it would be very difficult and expensive.{{Citation needed}}
|-
| Let's be honest, this should be Canada too || {{w|Southeast Alaska}} should be given to {{w|Canada}}, presumably because it more neatly fits with {{w|British Columbia}}. This is slightly problematic, as the state capital, {{w|Juneau}}, is within this section.
|-
| Why should Florida get Alabama's coastline? It has plenty. ||
The {{w|Florida Panhandle}} borders southern {{w|Alabama}} denying the state all but a sliver of coastline. Given that Florida already has an abundance of coast, the Graphic Designers consider the present arrangement unfair. Ceding the Florida counties west of the {{w|Apalachicola River}} has actually been {{w|Florida_Panhandle#Alabama_annexation_proposals|raised since the 19th century}}. This change would have the additional benefit of more neatly aligning Florida's western border with that of neighboring {{w|Georgia (U.S. state)|Georgia}}.
|}

In the title text, the graphic designers have a civil war between the ones that favor "panhandles" in the borders, such as the Oklahoma one which is enlarged in the map, the Florida one which is removed in the map, and maybe others such as the Texas region known as the "Texas panhandle". However, as graphic designers, they get too caught up in making the flag designs for their faction to actually fight. Randall has shown interest for vexillology (the study of flags) in the past.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[An outline map of the United States is shown, including state boundaries. The following edit marks are shown in red text:]
:[Minnesota's Northwest Angle is circled] Give to Canada
:[Border between Wisconsin and Michigan's Upper Peninsula is crossed out] This should be Wisconsin
:[New York's Long Island is circled, with arrows and question marks pointing to New Jersey and Connecticut] Move Long Island to NJ or CT or make it its own state
:[New York's eastern border has been straightened]
:[Wyoming's western border is moved to align with that of Colorado. The Montana/Idaho and Idaho/Utah borders are extended to reach the new border. Similarly, Colorado's eastern border is moved to align with that of Wyoming, and the Nebraska/Kansas border has been extended] Align to grid
:[West Virginia's northern panhandle has been given to Ohio and part of its eastern panhandle has been given to Maryland. In return, Western Maryland has been given to West Virginia. The altogether effect is that West Virginia and Maryland have more compact shapes] Clean Up
:[Rhode Island has been enlarged to encompass southeastern Massachusetts, and Delaware now takes up the entire Delmarva Peninsula] Enlarge Rhode Island & Delaware
:[The Oklahoma Panhandle has been extended west until it reaches Nevada, taking the northernmost parts of Arizona and New Mexico with it] If we're going to have a panhandle, why not commit to it?
:[The Missouri Bootheel has been given to Arkansas] Fix this thing
:[The part of Virginia west of the Appalachian Mountains has been given to Kentucky]
:[The southwestern and eastern borders of Nevada have been extended into Arizona until they meet a point. A part of California is slightly extended to reach the revised border]
:[Parts of Arizona and New Mexico have been ceded to Mexico, and part of Texas has been given to New Mexico, so that the southern borders of Arizona and New Mexico and the northern border of the Trans-Pecos area of Texas collectively form a straight line] Clean Up
:[Parts of northeastern Texas have been given to Arkansas and Louisiana]
:[The northern and southern borders of Tennessee have been straightened] Straighten to fix survey errors
:[A line has been traced along the coasts of South Carolina, Georgia, and northern Florida] Good curve! Keep.
:[Alaska's southeastern panhandle has been circled] Let's be honest - this should be Canada, too.
:[The Alabama/Florida border has been erased, and Alabama's eastern border has been extended south until it meets the Gulf of Mexico] Why should Florida get Alabama's coastline? It has plenty.

:[Caption below the panel:]
:It was scary when graphic designers seized control of the country, but it turned out they just wanted to fix some things about the state borders that had always bothered them. 

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Maps]]

1608: Hoverboard

2015-11-25T06:30:28Z

SJester:

{{comic
| number = 1608
| date = November 24, 2015
| title = Hoverboard
| image = hoverboard.png
| titletext = Return to the play area
}}

==Explanation==
{{incomplete|It's possible not all of the game's secrets have been unearthed yet.}}
The comic features a game made to celebrate the release of Randall's his new book, "Thing Explainer". The game was made by [http://chromakode.com Max Goodman] who has previously worked on [[1416: Pixels]]. The source code for the game (in a obfuscated form) can be found [https://xkcd.com/1608/tigl.min.js here]. The game features [[Cueball]] on a hover board in an arena filled with coins, initially it appears the aim of the game is to collect all the coins. However, a seemingly intentional bug in the game means that the player can jump and keep jumping forever without needing to land (As is usual for platform games like these). This allows the character to go out of bounds of the "Play Area" prompting multiple warnings insisting the player returns to said "Play Area". Exiting this area reveals a hidden world similar in style to the previous comic [[1110: Click and Drag]], which can be explored by navigating through various obstacles and hidden areas.

There are 17 coins in the "Play Area" and a grand total of 169 in the entire game.

Escaping from the starting area is quite simple, the character simply has to navigate through one of the multiple holes in the area and them simply jump over the wall on the left or the right of the starting area, this can be done by repeatedly tapping the jump key. The player can then explore. The game is physically bounded in the left and the right direction, but is technically unbounded upwards and downwards, however, past a certain point there appears to be nothing interesting in the up or down direction. It could be possible that some unexplored hole leads deeper into the map than has been found so far, it is also possible that jumping for a considerable amount of time would allow the player to reach some additional content above the map.

As previously noted, the comic bears considerable resembelance to [[1110: Click and Drag]]. The comic is made in much the same way, with 'drawn' images "glued" together to form a large "map", with the illusion of infinite bounds made possible through space saving techniques where blank tiles are not stored and are instead painted white. The boundary between blank squares and 'drawn' squares is made clear as any white space in the normal images has a very slight grey tint. Thus, seams between images and blank spaces can be discerned.

The tiles for the map are stored as simple PNG files in the naming scheme: X:Y+s.png. An example can be seen here: http://xkcd.com/1608/1013:-1096+s.png Each file is 513x513 pixels in size, one pixel is reserved as overlap to ensure seamless joining of images.
So far, through experimentation, tiles in the range 928 to 1108 X and -1112 to -928 Y have been discovered, internally, the position of the player is divided by 512 and rounded down to give the position of the tile.

===Areas===
There are many different areas beyond the initial starting area, exploration has found so far:

Notable features include a number of large ships in the sky, with various interiors which can be entered from several places. To find them, follow the strings which several characters are holding near the first ground area.

West:
Washington Monument -
Volcano -
Lava pools -
LOTR Eagles -
Elon Musk's Volcano Lair -
Landing re-entry capsule -
Giant spaceship / Floating rock island in the sky (x: 507163, y: -567537)
Hat underground
A hole which traps(?) the player unless noclip mode is used

East:
Wedding -
Giant bird nest -
Desert -
Ocean Yelper -
Graveyard -
Talking Rogue Wave -
People holding anchor lines to a Star Destroyer, among other ships.
Steven Universe and the Crystal Gems (inside ship, go down a shaft from the surface.)

[http://codepen.io/KyleDavidE/full/605dc87b614ff6b2bd716f4c6f640203/ Quickly hacked overview] - courtesy of [https://www.reddit.com/user/kyledavide kyledavide] on [https://www.reddit.com/r/xkcd/comments/3u4sy1/xkcd_1608_hoverboard/cxbyn86 reddit].

===Controls===
The controls are as follows:

* '''Go Left''' - Left arrow key, a or h
* '''Go Right''' - Right arrow key, d or l
* '''Go Up (jump or hover)''' - Up arrow key, w, or k

Through inspection of the game's source code, it can be derived that down, j and s are also accepted keystrokes, but it is unclear if the game actually uses these or not.

This control scheme covers the three commonly used directional key sets: WASD a set of keys commonly used by modern games; HJKL a set of movement keys used by vi and applications which attempt to mimic vi key controls (vim); and the arrow keys, the most generic set of keys which is usually accepted by most applications which take movement as input, these were commonly used in older games.

On a tablet (e.g. iPad) changing the orientation of the tablet will control the left and right motion, while tapping the image produced jumps.

===Cheats and Exploits===
Aside from the obvious ability to move out of bounds in the game, there are some more obscure hidden features which can't be enabled through normal gameplay, the ones found so far are as follows:

'''Modes''' are activated by opening the Javascript Console (F12 to open Developer Tools, then Console tab) and writing corresponding commands:

* '''Gandalf Mode: ''' ''window.i.am.gandalf = true'' - jumps and runs further
* '''Speedhack: ''' ''explorer.opts.speed= *Value*'' - Speed hacking, with 1 = normal speed
* '''Jump Hack: ''' '' explorer.opts.jumpForce= -*Value*'' - Jump hacking, with -1 = normal jump (positive values cause the hoverboard guy to move down when jumping)
* '''Mewtwo mode: ''' ''window.mewtwo = true'' - disables gravity
* '''Noclip mode: ''' ''window.noclip = true'' - player is able to move around the map without collision. Combine with Gandalf and Mewtwo modes for free easy map traversal.
* '''Goggles mode: ''' ''window.ze.goggles()'' - displays a small window showing area around the player in a pixelated manner
* '''Position Tracking: ''' ''window.explorer.pos'' - Returns the player location to the console. Can be used to track position and test to ensure you are still moving. Must be re-entered to compare positioning.
* '''Position Setting: ''' ''window.explorer.pos.x = *Value* or window.explorer.pos.y = *Value*'' - Can be used to manually set a position within the world. The start is at x: 512106, y: -549612. The left terrain bound is at x: 475210, y: -553711. The right terrain bound is at x: 567281, y: -549712. Mewtwo and Noclip modes are a must for exploring in this way.
* '''All the above: ''' ''window.explorer.opts'' - Contains all the game's parameters. You can directly mess with ''gravity'', collision (''disableCollision''), jump force (''jumpForce'') and speed (''maxSpeed''), among others. Run ''Object.keys(window.explorer.opts)'' to list all available parameters you can tweak.
* '''List all coins: ''' ''window.explorer.objects'' - Array containing the position of the 169 coins of the game.
* ""Disable tilt input:"" "getEventListeners(window)['deviceorientation'][0].remove()" - on Macs with motion sensor, disables tilt input which causes problems controlling the avatar

'''Getting All Coins: ''' To instantly get all coins, input the below into the console window. Does not use standard formatting of [i] to avoid conflicts with window.i.am.gandalf

for (var T = 0; T < explorer.objects.length; T++) {
explorer.objects[T].got = true
}

To teleport to the next coin every time you press the left or right arrow:

var T = 0;
document.onkeydown = function(event){
if (event.keyCode == 37) { T = T-1 }
else if (event.keyCode == 39) { T = T+1 }
else { return }
T = T % explorer.objects.length;
var coin = explorer.objects[T];
explorer.pos.x = coin.x1; explorer.pos.y = coin.y1;
}

For a quick tour of all the coins:

var delayInMilliseconds = 1000; // 1 second delay between each teleport. feel free to change this.
var index = 0;
explorer.objects.forEach(function(x){
setTimeout(function(){
explorer.pos.x = x.x1;
explorer.pos.y = x.y1;
x.got = true;
explorer.frame(); // forces a redraw
},
(index + 1) * delayInMilliseconds);
index++;
});

To see a list of coin coordinates you have not yet collected:

var L = 0;
for (var S = 0; S < explorer.objects.length; S++) {
var I = explorer.objects[S];
if (I.got) {
L++;
} else {
console.log(I.x1.toString() + ", " + I.y1.toString());
}
}
console.log("You've found " + L.toString() + " of 169 coins");

===Functionality===
By observing page code while playing, the game grabs and displays images based on location, and subsequently clears all non-visible images. The game uses what seems to be a position syntax to retrieve the intended images live, and returns an error if such an image does not exist, such as a blank area. This technically means things could be added to the world and updated live. If the player is moving sufficiently fast or if the internet connection is slow, this means that the player can get stuck in a black area that does not load in time.

This also means that the game does not have coded top or bottom limits, so any attempt to find the ''ceiling'' of the game will be futile unless the game is tweaked. The game does however have side limits.

When you deposit a certain number of coins, you will get one of the following messages:
* 0 coins : You got 0 coins in (n) seconds/ You successfully avoided all the coins.
* 1 coin : You got a single coin in (n) seconds/ It's a start.
* 2-4 coins : You got (n) coins in (n) seconds/ Not bad!
* 5-9 coins : You got (n) coins in (n) seconds/ Terrific!
* 17 coins : You got 17 coins in (n) seconds/ You found all the coins! Great job!
* 42 coins : You got 42 coins in (n) seconds/ No answers here.
* 169 coins : You got 169 coins in (n) seconds/ Are you Gandalf?
* All others: You got (n) coins in (n) seconds

Opening the console will display the text: what? hoverboard not enough for you!? in the log. Activating goggles mode will cause the text 'B-)' to appear in the log.

Leaving the play area will cause the red text 'RETURN TO THE PLAY AREA' to rapidly blink 3 times (150 msec duration), followed by a pause, and this will repeat 5 times for a total of 15 blinks. This will also reoccur if the player passes through the play area on their way back from exploring one side.

==Transcript==
{{incomplete|Something similar to 1110: [[Click and Drag]]}}
The game features Cueball on a hoverboard in a simple map. On the map are coins which Cueball has to collect.
It appears Cueball can jump multiple times without needing to land, this means that Cueball is able to escape the designated "Play Area".
This prompts a warning which soon disappears allowing Cueball to discover the world.

[THIS ONLY COVERS THE PERMANENT TEXT, NOT THE DIFFERENT WIN STATES] 
MY NEW BOOK 
''THE THINGS EXPLAINER'', 
COMES OUT TODAY! 

TO CELEBRATE, HERE'S 
A SMALL GAME. 

[TO THE SIDE, BELOW AN ARROW] 
DEPOSIT COINS HERE 
{{comic discussion}}

1324: Weather

2014-01-31T09:10:38Z

SJester: Store clerics should read store clerks, unless they're casting healing spells.

{{comic
| number = 1324
| date = January 31, 2014
| title = Weather
| image = weather.png
| titletext = At least if you're really into, like, Turkish archaeology, store clerks aren't like 'hey, how 'bout those Derinkuyu underground cities!' when they're trying to be polite.
}}

==Explanation==
[[Hairy]] makes a casual comment about the weather and [[Cueball]] responds with detailed information about the current weather system and forecasts, which Hairy probably wasn't interested in at all.

{{w|Jet stream|Jet streams}} are strong air currents high in the atmosphere which have a big influence on the weather. The [http://coolwx.com/cgi-bin/getptype.cgi?region=us&model=gfs&run=18&fhr=02&field=ptype 18Z GFS] computer model is part of the {{w|Global Forecast System}} used by the {{w|National Weather Service}} to predict the weather up to 16 days in advance. Part of this prediction is the {{w|atmospheric pressure}} expressed in mbar. 960 mbar is below the average sea level pressure of 1013 mbar, which is usually associated with bad weather.

Store clerks are known for small talk about the weather as part of their sales talk. The title text again emphasizes the problem that weather enthusiasts would have with this as opposed to people with different interests (like Turkish archaeology).

==Transcript==
:[Cueball and Hairy are talking.]
:Hairy: So, how 'bout this weather?
:Cueball: I ''know,'' right? The whole jet stream layer is ''nuts!''
:Hairy: Um, sure...
:Cueball: The 18z GFS forecasts 960mb by Tuesday. Think it'll verify?
:Hairy: What?
:Cueball: ...Right. Sorry. Uh, yeah! Weather sure has been crazy.
:Weather geeks have it tough.

{{comic discussion}}
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Hairy]]