Game Development

Ali.S

23:00

as you might know, I never actually grabbed any book, I just searched for whatever I needed and used the first thing I found

*I was 12 years old

user92578

wow that sounds really interesting

Hjorthenify

I've been programming since I was 12 and this year is the first year I've actually picked up a programming book

Ali.S

programming was always something magical to me, I loved playing games as a child, and I always imagined a day that I could actually develop games of my own

for that very reason, from the very first moment that I was introduced with programming, I just ran ahead of the class, and were always way ahead of it...

user92578

one of the coolest things I can remember from my child hood, is at when i was about 5 years old, i asked my dad what cool stuff he can do with a computer. a couple of minutes later he showed me a number guessing game he made for me

user92578

i loved to play it

user92578

23:03

and i was super impressed that my dad made something like that in such a short amount of time

user92578

now I of course know that from an experienced programmer it takes very little time

Ali.S

6 years form that time, when I was graduated from high school at age of 18, I had some programming experience, coupled with some concept of teaching programming

user92578

I bet most of the time he spent doing it was spent compiling :)

Ali.S

mostly because I attended programming classes. While having some different methods in my mind

The school I attended had a tradition, to invite it's newly graduated student to teach...

and me, as one of those gifted coders of my generated, started teaching there

user92578

thats really cool

user92578

23:05

wait how old are you now?

Ali.S

24

well, I'm gonna finish my 24th year of living in less than a month...

user92578

BTW (in no offense at all) my brother thinks that I'm helping Iranian terrorists to program bombs

Ali.S

he may think as he like... but I would love to talk to him, and convince him that he should not believe what the media says about us

user92578

yeah hes a smart kid, im sure hes just joking

Jon

I for one wonder how he would come to such a club conclusion

Ali.S

23:08

@Jon I guess you don't watch the news so often, do you?

user92578

He just likes to annoy me everytime I tell him something that I'm proud of

Ali.S

how old is he?

user92578

15

Ali.S

just a year younger than you?

user92578

two

Ali.S

23:10

then I guess it's just normal for brothers to have such quarrels :D

user92578

yeah :D

Ali.S

is he into programming as well?

user92578

no, not at all

Ali.S

lol

by the way, I'm the only one between my relatives who actually sits behind computer to produce something :D

if we exclude writing excel formulas that my father does from time to time, to ease his accounting :D

user92578

:D

user92578

23:15

user92578

Got the enemy parachute in place

user92578

still need to tweak the sprite a bit

Ali.S

@Tyyppi_77 you got the mail?

user92578

oh yeah

user92578

good that you mentioned, i normally only read my mail when i open the computer

user92578

23:22

I gotta make sure to read trough that one day

Ali.S

it's just a project that I started about 3 years ago... rewrote every aspects of it 3 times (except one single file), and never completed it

it's not something to read through... I actually gave you access with some evil intent: so that you help me finish it some day :D

user92578

ohhhh

user92578

super evil ali at it again :D

user92578

does it run at the state its at?

user92578

i might check it out tomorrow :)

Ali.S

23:25

yeah, it runs... you can even play it with your brother on lan

user92578

oh cool

Ali.S

well, you should reduce the number of AI players...

user92578

he wont even play gunhero with me tough, so i doubt that'll happen

Ali.S

there need to be at least 3 players in the game

and I'm not sure if I handled sending AI states over the net

user92578

WAIT IT HAS NETWORKING???

user92578

23:27

THATS AWESOME

Ali.S

but you can at least play that with current hoard of AIs (I think there are 63 of them right now)

with limit of at most 64 players in the game...

user92578

I so gotta check it out

Ali.S

@Tyyppi_77 serverless networking

user92578

doesn't matter

Jovito

0

Q: How to detect a collision between a isosceles trapezoid and a circle

I figured one approach would be to divide the trapezoid in three parts, two triangles and a rectangle in the middle. Then for the circle-rectangle case I would check collision like this: function testCircleRectCollision(circle, rect) { closestX = clamp(circle.x, rect.left, rect.right) ...

collision-detection

user92578

23:28

even clientless networking would have had me wowd :D

Ali.S

it's both server less, and people can join/disconnect at will at any time

server-less as in it's p2p

user92578

@Jovito I wonder if you could use the edges for this

user92578

111

Q: Circle line-segment collision detection algorithm?

I have a line from A to B and a circle positioned at C with the radius R. What is a good algorithm to use to check whether the line intersects the circle? And at what coordinate along the circles edge it occurred?

algorithm math line collision-detection circle

user92578

Doing that for every edge?

user92578

that's probably how I would do it

user92578

23:32

well

user92578

actually

user92578

I would just copy paste some one else's code

Hjorthenify

@Ali.S Who's keeping track of the IP's?

Ali.S

@Hjorthenify it's just on lan, remember? there is no need to keep track of ips

Hjorthenify

Ooh I missed that context :P

Ali.S

23:33

all players send broad cast whole game state (which is as tiny as 17 bytes) over the net

user92578

sounds simple

user92578

i doubt it is tough :D

Hjorthenify

Who's in control of the AI then?

Ali.S

@Hjorthenify actually there were plans to add a server which kept track of IPs, but it was postponed because lack of make files :P

user92578

oh man now i want to add lan multiplayer to gunhero...

user92578

23:35

but I know that way too hard

Ali.S

@Hjorthenify each game instance controls it's own set of AI players

user92578

specially this late in development

Ali.S

and the network system keeps track of data of which AIs should be sent over net and which should be updated with the incoming tarffic...

Hjorthenify

So each client decides for themselves what the AI does?

user92578

s.sin_addr.S_un.S_un_b.s_b1 now this looks like a fun struct :D

Ali.S

23:37

at least that was the design I was going to implement, I'm not sure if I actually did implement "multi-update" messages, which were required for a game to have both network and AI enabled at same time

@Hjorthenify each client introduces it's own set of AIs and only controls them

user92578

BTW the code looks super slick

user92578

really easy to follow and tell what's going on

user92578

anyways its almost 3AM

Hjorthenify

And each client could make up to 63 AIs?

user92578

so i'll head to bed now

Ali.S

23:40

@Tyyppi_77 fun note: there was a winsock library. at some point MS decided it needed to adopt berkley style socket headers (*nix) style and ended up with winsock2

that's how winsock2 looks like :D

user92578

oh lol :D

Hjorthenify

:P

user92578

thanks for the chat guys, i had a really pleasant night coding session

Hjorthenify

:)

Ali.S

@Hjorthenify there can be at most 64 players in a networked game playing on same field. it could be just a single client with 63 AIs, or two clients each having 31 AIs or 64 clients with none having any AI players

user92578

23:42

mum will be a bit pissed at 2PM tomorrow when I wake up, but that's something I'll worry about later :)

Ali.S

@Tyyppi_77 I gotta go get some sleep too... it's already passed 4am, and the class starts at 10:30am

@Hjorthenify if you were wondering, based on the original design, it didn't matter how many players each client brings into the game, as long as total players remains below 64

this meant, a client could have joined with just himself entering the game. another client could join with 4 players playing on same device, and a third client could join, only offering 10 AI players... and they could all play happily with each other

Hjorthenify

Ah nice

Why the limit of 64?

Ali.S

any convex shape has a collision with circle if one the following occurs:
1. one of it's line segments collides with circle.
2. one of it's vertices is inside circle.
3. circle's center is inside that shape

@Hjorthenify it was something forced mostly by packet size...

Hjorthenify

Ah

Ali.S

I didn't want my game update packets to be larger than 500B, so that the game could send 30 updated packets with as low as 15KBps bandwidth

Hjorthenify

23:48

Could be kinda cool if each client could design their own AI and then battle against each other

Well by todays standards you could probably up it

Ali.S

the game was originally designed to be played over the internet, but it didn't make it there sadly

@Hjorthenify not by Iran's standard... even 15Kb is way too high for most users :(

Hjorthenify

Whaat

Ali.S

yeah... that's the country I live in...

Hjorthenify

Its getting better, right?

Ali.S

not really, i was like this for the past 6 years...

my net is getting upgraded every year or two, but simply because I feel the need to pay more for the net...

currently I'm paying 30$/month for a 2Mb net with 40GB traffic...

Hjorthenify

23:53

I meant more the country overall

And damn that's kinda expensive.. :o

Ali.S

my net used to get to the pick rates of somewhere near 600KBps before, but now it's kinda limited to 400KBps

Hjorthenify

:/

Ali.S

it's a norm in Iran that you get more speeds that what you actually pay for, since the traffic is tightly limited

Hjorthenify

I used to get 700kbps, but now I get 12mbps :P

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