Name: Node.jsで一緒にポケモンを遊ぶ - Samuel Agnew - JSConf US 2019 (Playing Pokemon Together With Node.js - Samuel Agnew - JSConf US 2019)
Uploaded: 2021-01-14T10:26:49.000Z
Duration: 29 min 15 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Playing Pokemon Together with Node.js - Samuel Agnew

Another fun fact about our next speaker: If you haven't seen his profile picture for the

It's actually him playing onstage at metal fest in Peru, when he did a South American

So next we have playing Pokémon with Samuel Agnew.

Is there any way I can get like something where I don't need to use my hands?

>> Unless I could, could, like, one-hand live code.

Dang, though, so this thing is not a thing.

OK, I don't need to be coding until a couple minutes into my talk so I might as well get

How's it going JSConf, a company called Twilio pays me to build goofy hacks and about them

and I flew in from New York City the other day, and speaking of JavaScript developers

from New York, I want to give a quick shout to by buddy speaking in the other track.

You should watch it on YouTube later because he also organization a meetup called Queens

JS which is one of my favorite ones and sometimes I convince my employer to give them money.

This talk is going to be more of a fun one than a serious.

It's the last session and I know towards the ends of conferences attention spans start

wane, so I figured what could be more fun than playing Pokémon with a bunch of JavaScript

I'm running Pokémon red version which is a game I played a ton as a kid.

And I have the Windows version of this emulator running, even though I'm on a Mac and the

reason for that is there are a lot of old game emulators where the Windows versions

of them have developer tools, because people still make real games for these old systems,

and for some reason or other, most of those developers use Windows, so one of the features

that this emulator has that I'm going to be using for my talk is scripting functionality

so we can run lui scripts and we can control the memory of the game and button input and

So what we're going to do is we're going to write a Lewis script that interacts with a

node.js express server sitting behind a Twilio phone number and I'm going to have you all

text a Twilio phone number to tell me what buttons to press in the game and the Node

app and the script are going to communicate with each other.

Sweet, awesome, so this might sound kind of familiar to to some of you.

If you about five years ago, there was a twitch.tv livestream but instead of a human being playing

it, it was everyone watching the stream typing in the chat which buttons would be pressed

and when you have 80,000 people playing the same game controlling it at the same time,

So when I found out that these emulators had scripting, I guess because I work for Twilio,

I was like, whoa, wouldn't it be cool if you could do that with text messages, too?

And I it turns the Lua scripting thing is really popular in the speed scripting community.

Where people try to write scripts to complete games in the most efficient way possible.

This documentation seems pretty bare boneses so I've actually been following this other

Turns out all these old game console emulate y they have the exact same Lua API I guess

because they're all open source and once one implemented it the other ones were like, cool,

You can do stuff like read and write bytes to the game's memory, like the RAM and ROM

I'm going to have this Twilio phone number set up so that I can programmatically control

T so whenever you send a text message to this phone number and it's a 760 phone number which

So whenever you send a text to that number Twilio is going to send a post address to

this address right here, which is basically a tunnel to a port on my local machine that

my Node express app is going to be listening on.

That app does not exist yet so we'll get to that later.

If you text this number right now, literally nothing will happen because it will be dropped

on the floor because the code doesn't exist.

I'll show it on the screen later so you don't have to copy it down right now.

Anyway, let's get into the basics of how to write code for this Game Boy emulator.

I'm going to do a Hello World thing, you might have seen on this, I have my Twitter handle

I'm going to say hello, JSConf with a smiley face, and I'm going to save that and I'm going

to stop this other script from happening.

And I'm going to go find this Lua script on my computer in my talks folder in the JSConf

folder and I'm going to run that and it says, hello, JSConf cool, we've run some Lua.

And the reason is it's only running once.

We can repeatedly print this on every frame if we want it to stay.

And for that we need to write an infinite loop.

Because this emulator, the whole environment in there is single threaded this will actually

So this emu object gives you a function where you can control the frames so you can advance

This way our infinite loop is pretty much taking over the run time of the game so that

each iteration of this loop is going to be one frame of the game.

So all this code will execute on each frame so I'm going to advance to the next frame

at the end of each loop and going to restart that and now the hello JSConf is going to

Now I'm going to write some useful stuff.

So what we want to do is this Lua script is going to communicate with our Node.js stuff.

I know this is JSConf and I'm writing Lua.

I don't know how many of you in this room consider yourselves Lua developers, but I'm

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Node.jsで一緒にポケモンを遊ぶ - Samuel Agnew - JSConf US 2019 (Playing Pokemon Together With Node.js - Samuel Agnew - JSConf US 2019)

stuff

critical

grab

tackle