Game Development

John McDonald

00:02

@Jovito I have DOM displayed over Canvas here: skippyfish.jcpmcdonald.com

Chris

@Pip yay for stuff

Pip

:D

I just finished copying code from the unrefactored game to the playing state, now writing a paused state

the cool thing here is that the way the state manager works it updates and draws the last state on the stack, but my paused state takes a playing state in the ctor, and also draws (but not updates) it :D

Chris

sounds geeky

:D

Pip

:D

(sneaking suspicion that Chris's account has been hacked by wife/someone else)

XD

Chris

00:19

nahhh, just me

Pip

I wouldn't think you would say something like that since you happen to be a geek as well. I mean, it was a compliment, but still :)

Chris

;)

the kind of technical jargon that sounds confusing yet makes sense

Pip

:D

Deep

I have a question about the physics of my game. Is anyone around?

Chris

ask away

Deep

00:28

Thanks :D

Chris

someone might have an answer :)

Deep

My game is a platformer, and its composed of tiles that are a certain number of whole pixels high, dependent on the screen, stored in units. How can I ensure that my player behaves the same way on all screen sizes, using this value?

bazola

what graphics library are you using

Deep

I'm using HTML5 Canvas, and all my own code

Is that what you meant?

bazola

yeah. the size of the canvas is equal to the size of the window or is it a fixed size?

Deep

00:35

its based on the screen size:

width = window.innerWidth,
height = window.innerHeight,
tilesX = 40,
tilesY = 20,
units = Math.floor(width / tilesX),

then canvas.width = units*tilesX

and the same for height

Pip

Cool, flipping between paused and playing works. On to UI!

bazola

i would think that you could scale it in such a way that it is always the same number of units, and base the physics on the units

Pip

I might try to pull in an external library for that. Opinions @Chris?

Chris

I just use Unity, I don't know anything

Deep

player = {
        x: 0,
        y: 0,
        speed: Math.floor(units/8),
        velX: 0.02,
        velY: 0,
    },

friction = units/42.5,
gravity = player.speed/13.4,

Jumping:
player.velY = -player.speed * 2;

Movement:
player.velX+= units/8;

friction and gravity are then subtracted from the velX and velY properties, which are then added to the players x and y position

Pip

00:38

@Chris bleh. Unity makes everything so easy :(

Deep

the 42.5 and 13.4 are completely arbitrary, but they give the intended behaviour on my screen size

Pip

That's honestly both a good and bad thing

Deep

units is 34 on my screen

GnomeSlice

They said it couldn't be done... but I-I've made the perfect grappling hook!!! http://t.co/XB1fpsr2Ki

Tweeted by fromsmiling on May 27, 2015 at 6:48 PM in reply to fromsmiling

lmfao

Chris

@Pip the less frustration the better!

Pip

00:41

eh, true

I really like being able to manage my own framework

It makes me learn more

Deep

any ideas?

dyou need more info?

bazola

you need to scale the arbitrary values based on the screen size or number of total units?

Deep

i need player.speed, fraction and gravity to scale in proportion to one another at the moment

so if units doubles, the three values increase the correct amount

I'll come back in the morning and try to fix it

cheers guys

Pip

cya

Icy Defiance

00:57

someone kill me please. gist.github.com/IcyDefiance/f9ca71505da1b2adb376

javascript closures are crazy

Pip

lol

Icy Defiance

but check this shit out. try uploading like 4 images at once. test.veuwer.com

Pip

Nice!

I just uploaded all five being the same image btw

you might want to disallow that

test.veuwer.com/1a,19,1b,1c,1d

Oh man "Submit gallery to Voat"

very nice, very nice

Icy Defiance

oh no it's totally allowed, and the server detects it, so it doesn't actually save 5 images :D

Pip

Nice!

Oh wait, it seems to be not working

Icy Defiance

01:01

I need to use an MD5 hash for that instead of the slow sha-whatever, though. No idea why I did that.

Pip

they all have different urls

Icy Defiance

yeah they have different urls

just not duplicate data

Pip

oh nice

Whoa. I probably have said this before but I am really frickin' impressed that @ClassicThunder wrote Ruminate GUI

Icy Defiance

oh yeah lol he said I should contribute at one point

I was like nah got my own framework to work on

Pip

I needz the GUIz

Looked at Ruminate. Seems decent but I want something with CSS styling

This looks amazing but I can't find anyone mentioning where it came from

bazola

01:15

what are you using to draw to the screen @Pip?

Pip

Uh. The Monogame SpriteBatch?

I could expose OpenGL if I had to but that would be a lot of effort for something like this

bazola

yeah thats pretty low level

Pip

yeah it is

Alright, I'm heading to bed for right now. Night all!

Much progress has been made!

Chris

03:16

Blizzard's looking for a remote sysadmin: careers.stackoverflow.com/jobs/87284/…

have to send your resume to a Hotmail address, hah

Hjorthenify

04:45

@OMGtechy I can understand swedish, but I can't really speak it :P

Hjorthenify

05:17

@Pip Still seems like a WIP

The UI library that I've been working on finally starts to take form! Whohoo #MonoGame #GUI #gamedev http://t.co/kqlbxSl9Jc

Tweeted by PhilipStolpe on June 29, 2014 at 7:55 AM

SpartanDonut

Heyyyyyyyyyyyyy youuuuuuuuuuuuuuu guyyyyyyyyyyyyyysssssss

Hjorthenify

Hiiiiiiiiiiiiiiiiii Donut

Aidan Mueller

Donut.

Hjorthenify

How's Sparta these days?

SpartanDonut

It's madness

Aidan Mueller

05:20

@SpartanDonut What is this place?

Is this sparta?

@Hjorthenify It's funny that we are talking about this right now. I just listened to a song called thermopylae:

audiomachine - Thermopylae

►

Hjorthenify

Can't listen to it right now :P

Aidan Mueller

Por que no?

Hjorthenify

In class :P

SpartanDonut

Hjorthenify

Haha

Hey, wanna hear a joke? - Sure - Java

Tweeted by PhilipStolpe on August 1, 2014 at 10:10 AM

SpartanDonut

05:26

Should add in a left arm holding a half eaten donut and crumbs flying all about

Hjorthenify

I like this guy

No

Just add a pile of them to the tip of his sword :P

Oh "this guy" made the website for monogame O_o

user92578

06:03

Last exam in a couple

user92578

Vector math, probably the hardest and the most important one

Panda Pajama

I've always wondered

all these indie devs who have development blogs, or post making of videos

they have way too much time in their hands...

user92578

Yes.

Panda Pajama

I'm always running against the clock when making games

and end up not sleeping at all for the last week

I find it inconceivable to keep a blog, or make and edit a nice making-of video

makes me think "are these people actually the ones who make the games"

they also sometimes show their workspaces

and they're so clean

everybody I know who makes games has their desks full of specs, test devices, documents and stuff

Hjorthenify

06:38

@Tyyppi_77 Me too! Only this is in 20 min, lol

Chris

06:50

@PandaPajama I blog when I'm frustrated (aka I've hit a brick wall and need to rant)

but yeah, I'd largely rather either code, test, or maybe take a screenshot before writing up a big article. and talking in here is short and sweet

Panda Pajama

07:49

@Chris I'm talking more about when people make huge blog articles explaining something in the game, how it's made, or why something is the way it is. It would take a few days (if not weeks in some cases) to compile and edit the information necessary for such an article

aren't these people supposed to be making their games instead?

or making-of videos. Some are so well edited it's obvious it took at least a week worth of work to create

they have way too much time in their hands

user92578

08:26

Went okay

user92578

But that's all folks

user92578

Tomorrow is the day I fear, feedback day where we get our tests back...

user92578

But the actual work is done

MickLH

09:13

@Jon it's way too middle of the night for stack exchange dude

Jon

its 6am

MickLH

The sun isn't even up here. I take it you're on the east coast?

Jon

eh?

Jon

09:33

oh man it was too early to process that lol

ok -- so yeah i'm on the east coast

Pip

09:56

samesame

@Hjorthenify hahaha you found the guy who I was hunting for yesterday

what luck

Mutch95

Is it possible to make one of these programmatically?

because changing the color of a texture2D seems to be quite weird to do

Kevin van der Velden

One of what?

Mutch95

the "Image" in like ui

to change the color property

Pip

Yeah IIRC

Mutch95

link please?

Jon

10:10

eh?

renderer.color

Mutch95

for texture2d?

Jon

yeah, whatever renderer you are usin

what are you rendering it with?

Mutch95

GUI.DrawTexture

Jon

ah ok

Pip

myObject.renderer.material.color = new Color(whatever);

Jon

10:13

you know GUI is not suppose to be used anymore

Pip

should work

Jon

You should be using the new UI stuff

GUI is deprecated

William 'MindWorX' Mariager

I think I'm gonna download Unity

user92578

NOOOOOOOOOOOO

user92578

Don't do it!

William 'MindWorX' Mariager

10:17

It's doing it!

Blame Jon!

user92578

Another soul is lost

William 'MindWorX' Mariager

He's the one showing me that stuff can actually be done in Unity.

Pip

21 secs ago, by Tyyppi_77

Another soul is lost

William 'MindWorX' Mariager

And promises that it'll only be a pain in the ass the first year.

Pip

But. you are close to finishing your other thing. NOOOOOOOOOOOOO

Mindy has gone to the dark side

William 'MindWorX' Mariager

10:20

Speaking of finishing things, my cellular normal+specular mapping is almost working.

user92578

One reason why I can't use Unity is because the free version doesn't offer a dark theme

William 'MindWorX' Mariager

Still has some artifacts though

I don't use dark themes. They're a pain in my eyes.

user92578

Really?

user92578

I just can't eat dirt

William 'MindWorX' Mariager

I can ... :P

user92578

10:24

God I'm so funny :)

Jon

@William'MindWorX'Mariager sucks but yeah

Mutch95

apparently the Cursor has a different understand of what the center of the screen is compared to the ui element centered

William 'MindWorX' Mariager

@Tyyppi_77 The funniest :P

Jon

Everyone seems to be pushing Unity pretty hard -- I wish they would provide more source code for their engine though..

But their model really doesn't need to do this

So that won't happen

You can license their source code for a large chunk of money

William 'MindWorX' Mariager

The main reason I would use Unity is the easy crossplatform solution.

Jon

10:30

Shaders are open source -- thankfully. The property names are obfuscated in code -- so there is no way to programatically set the property values of shaders without having the source code -- unless you are lucky and can guess the property names

William 'MindWorX' Mariager

Seems there are a lot of other headaches with Unity that I avoid completely with monogame/xna.

Jon

like what?

user92578

Colors are place holders, but I'm making some progress. Not sure if I actually like the design, but this might also be just a process of getting familiar with how creating a whole boss fight happens.

user92578

William 'MindWorX' Mariager

@Jon Well, just the things I've witnessed. Things that should be simple which aren't. I can't name anything specific though.

Jon

10:31

@Tyyppi_77 looks awesome man -- can't wait to play this

@William'MindWorX'Mariager in most cases, it is the learning curve

If you are not used to the EF and all the Unity ways, yeah it can get pretty frustrating

William 'MindWorX' Mariager

Well, I managed to get into EVE. Unity shouldn't be a problem then :P

Jon

But I spent some time with both XNA/Monogame and Unity -- and there isn't really anything I can think of

Xna is a great framework and unity is a great engine

I can produce faster on Unity than XNA

I'm more on board since version 5 really.

I can use RenderTargets, and the profiler now

RENDERTARGETS!!! Can't believe that was locked out previously.

William 'MindWorX' Mariager

Seems like a huge thing to be missing out on :P

Jon

@Tyyppi_77 the shading looks really good on that robot man

user92578

Thanks

user92578

10:35

It's just something I've thrown together to make the pieces clear

William 'MindWorX' Mariager

@Jon, How would I go about make a very basic sprite which I can move around with the arrow keys?

I assume I need an object with some visual component and a position component?

Jon

create a gameobject, add a spriterenderer

link the image to the sprite renderer

add a script to the same gameobject

write in update() Input.GetKeyDown

Mutch95

UI Center doesn't center with cursor center

Jon

@William'MindWorX'Mariager your first month is going to suck.

William 'MindWorX' Mariager

:D

Mutch95

10:41

any ideas how to fix this?

Jon

@Mutch95 maybe you need to convert to world position?

screenshot?

William 'MindWorX' Mariager

When I import an image, does it create a reference or does it copy the asset locally?

Mutch95

when i screenshot it hides the mouse

Jon

it copies it locally

@Mutch95 not sure, but you may have to convert to screen position

William 'MindWorX' Mariager

Okay

Jon

10:44

docs.unity3d.com/ScriptReference/Camera.WorldToScreenPoint.html

Mutch95

the UI element?

William 'MindWorX' Mariager

How do I get a position component?

Translate or something?

Jon

No idea :)

position is in transform

Gameobject.transform

William 'MindWorX' Mariager

Hm

How would I do something like this: this.transform.position.y -= 10;

Jon

go.transform.position -= new vector2(0, 10)

William 'MindWorX' Mariager

10:47

Ah

Jon

the position is a property

its annoying as you cannot modify the x,y,z values seperately, but whatevs.

William 'MindWorX' Mariager

That doens't seem to work.

Jon

wut u mean?

William 'MindWorX' Mariager

> The call is ambiguous between the following methods or properties ...

Jon

oh

vector3

William 'MindWorX' Mariager

10:50

Ah

Jon

go.transform.position -= new vector3(0, 10, 0)

William 'MindWorX' Mariager

Works

Jon

yay, your first game!

William 'MindWorX' Mariager

Well, kinda :P Just how much is 10? :P

Jon

10 units

William 'MindWorX' Mariager

10:50

The instant I hit a key, it's gone :P

Jon

yeah, 10 by default is huge

0.01 is 1 pixel

10 == 1000 pixels

William 'MindWorX' Mariager

Ah

Hrm

Jon

you can set the unit size of your sprite

William 'MindWorX' Mariager

They camera is upside down compared to XNA :P

Jon

Yes... yes it is

William 'MindWorX' Mariager

10:52

That's so weird :P

Jon

Wait till you work with data

everything needs to be flipped

think about an array of data for example

0 starts at top left

in unity, it is actually bottom left

user92578

Progress spam:

user92578

Jon

oh man.. can you make it so the guy controlling the mech is hitler?

user92578

Not sure

William 'MindWorX' Mariager

10:53

Wolfenstein reference :D

user92578

Probably not :DD

user92578

That's actually "Count BlackCape"

Jon

actually it was a bionic commando ref

but that works too

user92578

It's kinda odd work on art with two screens, as the colors aren't perfectly balanced

user92578

But I always use one screen for drawing and the other for viewing it ingame

user92578

10:55

I've balanced the colors so that they look okay when I have multiple VS windows open on two monitors

user92578

And so that this chat looks good on the other monitor

Jon

Google should ban apps from requesting permissions it clearly doesn't need

Peggle Blast -- Requires permissions to know who you are, where you are, all your contacts, your photos, network, your browser history

user92578

lol

Jon

like, what the actual fuck?

user92578

yeah

Jon

10:56

browser history?

Mutch95

@Jon setting the UI position to world coords won't work because it moves to to world position

user92578

But yeah I can just have my game open, and when I want to see how the mech looks ingame, F10 reloads the graphics

William 'MindWorX' Mariager

Reminds me of the taxiapp our company uses. The sole purpose is to allow the customer to order a taxi easily.

Jon

@Mutch95 yeah i have no idea what the problem is really,

William 'MindWorX' Mariager

But for some reason it wants access to all files and images ...

People are a bit paranoid and not everyone will install it.

Jon

10:58

I wouldn't

if everyone didn't it would change

but everyone installs it anyways

Pip

yep

Jon

But I mean, clearly if an app is free -- and it is requesting personal information -- they are selling your information to someone

And they don't even need to have your permission to do this

Mutch95

The problem is that the mouse Centers in a different spot as the UI elements centers in its the actual center of the screen

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