Game Development - 2014-12-15 (page 1 of 3)

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oldmud0

00:06

?! SlimDX is really mature but doesn't have tutorials?!

user4704

No, it doesn't.

user4704

(Well it has a small handful.)

user4704

We saw very little to write tutorials because, as I said, everything is a mechanical transformation from native D3D.

oldmud0

How so? How do I simply adapt a native d3d tutorial to SlimDX without any knowledge of native D3D?

user4704

Well presumably the tutorial will give you some understanding.

user4704

00:11

But native D3D is basically the same as SlimDX, except slightly different names for things.

user4704

And a few bits of .NET-ification.

oldmud0

Sigh. I guess I will try out SharpDX and follow up later.

user4704

It's the same thing.

user4704

SharpDX's API is almost 100% identical to SlimDX's.

user4704

(this also means you can use most tutorials interchangeably)

user4704

00:19

And also, again, you asked about camera manipulation and D3D doesn't have a camera API.

user4704

Most of what you need to get that working is linear algebra (matrices, vectors, and/or quaternions if you are into that sort of thing)

user4704

Then you just send that matrix to D3D via the effect framework or the shader constant buffer APIs, depending on which version you are using, etc.

user4704

Oh dear, the hats are here.

user4704

IMITATION CRAB!

SpartanDonut

01:12

My cat likes apple fritters.... lol

Wait

You said hats

I don't know what we're talking about

Noctrine

01:42

So, how is everyone.

AttackingHobo

@Noctrine pretty good. Made some nice progress on Rad Stacking

Almo

@AttackingHobo hey

user image

AttackingHobo

@Almo 0_0

Nice!

Almo

thank :)

AttackingHobo

This version feel pretty good speed wise?

Almo

01:56

seems ok to me, though I think I'm ok with more speed than some others might. a little slower was ok with me as well

AttackingHobo

Camera angles feel good?

Almo

i think so

AttackingHobo

I was thinking about how hard it would be to add multiplayer

local and online.

local should be pretty easy

online shoulnd't be too hard as there really isn't any player interaction

Ready... Set... Stack!!!

Almo

heh

time for dinner talk later :)

AttackingHobo

Ok. TTL

@Noctrine you have a chance to check out the latest version?

Noctrine

02:00

I did not know this was a thing.

I've been away.

AttackingHobo

02:12

user image

Look how many nearly perfect ones in a row I got there!

AttackingHobo

02:29

user image

>:D

AttackingHobo

02:44

user image

Almo

02:58

@IcyDefiance you here?

Icy Defiance

aye

Almo

lol?

and it's embarassing how often flash gets patched

AttackingHobo

@Almo scroll up

Icy Defiance

I'm already logged in, but you're not D:

Almo

I did obo :)

user image

what happens if you try to buy a mount for the Tank, which doesn't allow mounts

it goes haywire

2 hours later…

AttackingHobo

05:13

user image

user image

3 hours later…

RhysW

08:09

@AttackingHobo nice, thats a good set!

2 hours later…

Almo

10:13

@AttackingHobo got 33 :)

Mutch95

Now why would nothing be called after this comment?

if (GetComponent<connectorEnable> ()){
			this.GetComponent<connectorEnable> ().isConnected = false;

			if (this.GetComponent<connectorEnable> ().connectorRef.GetComponent<connector> ()){
				this.GetComponent<connectorEnable> ().connectorRef.GetComponent<connector> ().isConnected = false;
			}
			//Nothing is called after here
			this.transform.parent = null;
		}

Lokkij

10:34

First of all, please cache the component. (connectorEnable conn = GetComponent<connectorEnable>(), and then use conn instead of constantly calling GetComponent)

Did you put a breakpoint on the line that doesn't get called?

Also, please capitalize the first letter of your class names.

Mutch95

umm when i put a break point down it goes down to the bottom of the if statement

Lokkij

So it skips this.transform.parent = null?

Mutch95

yep won't allow me to add a break point it

just goes down to the closing bracket of the first if statement

Lokkij

Hmm.

¯\(°_o)/¯

Mutch95

damn. I bypassed this crap just by putting this.transform.parent = null above the if statement

hm?

Lokkij

10:46

Ignore that. Friend being stupid.

Mutch95

lol alright

Serial

lol what did it say?

Mutch95

Alright so i fixed it

somehow

apparently if (this.GetComponent<connectorEnable> ().connectorRef.GetComponent<connector> ()){ broke it

i change it to if (this.GetComponent<connectorEnable> ().connectorRef){

I'd like to know why that broke it

Yeah it works now!

what

oh god

I need some reasoning behind this catastrophe

Jon

11:11

connetorEnable is a script?

Mutch95

yes @Jon

Jon

and connectorRef is a gameobject?

whatwas the error?

Mutch95

no error just the if statement stop the outer if statement running

as retarded as it sounds

1 hour later…

Jon

12:36

if you were not in debug mode, it might of been a null ref that was not noticed

Jon

12:58

Who has a win8 phone>

user92578

13:56

how would I map pixel-space texture positions into OpenGL texture coordinates?

user92578

like pixelPosition / textureWidth = OpenGL Float Position

user92578

But how do I convert from topleft texture coordinates to bottomleft texture coordinates

Serial

Added some particles!

user image

Jon

Wait,your not gonna make those chickens blow up?

Serial

colors look odd in gif, and frame-rate is low for some reason

That's a good idea hahah

user92578

14:05

Aight tile rendering works now with OpenGL

user92578

user image

user92578

this is with glVertex() and glTexCoord calls, so I need to switch into buffers and then implement shaders

Serial

nice

Hey Tyyppi that's the Python RPG I was talking about

user92578

Necrosomething?

user92578

for some reason I just couldn't get a python game running with enough FPS ever

user92578

14:08

but I glad I switched to C++

Serial

Yeah its running at 50

In the gif it says in the 20's not sure why

Yeah we gave up on it because a project of that size can't really be done with pygame, but I still use it as sort of a platform for testing stuff haha

1 hour later…

user92578

15:24

now with 100% more shader usage:

user92578

user image

user92578

next step is transition to VBOs, and then all I gotta do is implement the stuff I need for the shaders (like shading of textures) and then clean the code a bit (it's really hacky now)

Jon

looks good.. pixelly though

Joe

^pixelly is nice, if intentional?

user92578

pixel art!

user92578

15:27

(so intentional)

user92578

need to allow for many texture scale modes tough

Ibrahim Apachi

15:50

Since my question was too off topic for game dev, I will ask my question on here:

So my aim is obviously to program a game. Since I just wrote a simple Pac Man game in Java and it was nothing serious, I will call myself still a noob. I have many ideas how this game should look and how it should work.

There is so much stuff what I want to do, but I didn't really start the programming. How do you approach a gaming project ? Do you sketch your ideas or write them down and then start coding. Do you start coding and then keep coding depending on your changes about your ideas of the game ? Is it a good thing to include a mastermind group and make your game a group project ?

How do you select design patterns for your game ? These are my questions for approaching the simple start of developing a game since I am really not experienced and I hope that you are glad to spread your wisdom.

Almo

@IbrahimApachi If I have a problem when making a game, and a design pattern appears to solve that problem, I use it

that's as far as it goes

as for proceeding on a game, my game ideas tend to be small challenges: maniac-games.com

so I just start programming it

often I start with a prototype to get all the gameplay working, then fill in the rest of the game around that

Lokkij

@IbrahimApachi I usually write the general idea of my game down, and then start coding the core of the games. Then when the core is in place, I start expanding on it and adding stuff.

Ibrahim Apachi

So just write down the core, code the core and then let your ideas flow and expand the code ? :D

Lokkij

Basically, yeah. I might not be the best guy to take advice from though; I've never completed a gamedev project.

Joe

@IbrahimApachi in general I think most people will tell you planning before coding generally increases success rate of a project. I personally like to think about all of the different "objects / structures" I'll need to deal with in a project and try to describe their relationships

once I have all that in plain english on paper that generally helps me figure out what kind of code / design patterns I could utilize

Almo

16:00

how is Time Rifters casual?

(that's a popular tag for it)

Joe

also don't be afraid to try something 3 or 4 different ways... that is where you'll learn things

Lokkij

^

William 'MindWorX' Mariager

16:22

My google skills are failing me. I'm looking for an implementation of resolving collision between two spheres/circles by sliding along eachother. No bouncing or anything.

I've tried googling "circle circle sliding collision" and "sphere sphere sliding collision", but I'm not getting anything useful. Most sites deal with sliding along planes.

I could slide along the separating plane once they're touching, but I'm not sure that'd give the right effect.

I have a sort of idea how to solve it, simply by moving along the radii and pick the direction to move around depending on angle of approach, but I wanted to see if there were some more general solutions around first.

user92578

just finished the last swedish-essay of this year... :)

user92578

Would it make sense to hold a VBO in the renderer class? Can I batch stuff with different textures together?

Almo

16:39

@William'MindWorX'Mariager an interesting question

AttackingHobo

@William'MindWorX'Mariager Not quite sure what you are trying to do. could you sketch a diagram?

user4704

@IbrahimApachi I think you should start by simply starting. Don't try to "plan" too much (especially in the beginning) and don't try to get a group together.

7

Almo

if he's got two circles that are moving and come into contact, he wants them to slide on each other as they continue to move, remaining in contact the whole time

user92578

I just can't figure out the place to hold the vertex data... maybe hold a list of VBOs in the renderer, create a new one when an object with a different texture than the previous ones, and then just append data to the VBOs on render calls, and then finally make method call to the renderer to render all the VBOs created during the "rendering". Then the renderer would clear the VBOs and start all over again.

Almo

@JoshPetrie yeah, the group will fall apart unless it's led by someone who knows where they're going

user4704

16:42

When you are just starting out you need to build your own staple of experience and get familiar with your own work habits first and foremost, to find out what process works for your the best.

user4704

@IbrahimApachi As for "design patterns," I would advise more or less forgetting they exist, at least in the form you're talking about.

user4704

You shouldn't think "what design patterns do I want to use?"

William 'MindWorX' Mariager

@AttackingHobo Will do. :)

user4704

You should think "what problems do I want to solve?"

user4704

Design patterns are a way of codifying certain common techniques so that programmers can talk about them.

user4704

16:43

They are not to be viewed as a grab-bag of ready-made solutions.

user4704

@Tyyppi_77 I stuff the VBOs into a Geometry type.

user92578

BTW it seems like the hats have a smallish bug:

user92578

user image

user92578

@JoshPetrie And the geometry type does what? Is used by who?

AttackingHobo

@IbrahimApachi Yeah. Just start programming. Make some small personal original prototypes. Don't use any planning, or even art when you start. Use some cubes and make stuff happen. If you can make a fun game without any graphics to keep people interested then you are on the right track.

William 'MindWorX' Mariager

16:46

user image

Lasse

Oh no not the hats again

Almo

show him Rad Stacking. A prime example of a game with little in the graphics department being fun

user4704

@Tyyppi_77 Report it on meta? (I don't see what you see.)

user92578

the third one is too small

user4704

@Tyyppi_77 It contains the vertex and index buffer data, various associated meta data (vertex count, primitive type, instance information, etc)

William 'MindWorX' Mariager

16:47

Imagine a ball rolling down a hill, hitting a pole. It'll slowly slide along the pole until it can continue rolling down.

user4704

@Tyyppi_77 yes I see, but I'm saying it doesn't look that way to me

user92578

ah

AttackingHobo

@IbrahimApachi I made a prototype for this over a year ago. And finally picked it back up to finish and polish. pretentiousarts.com/RadStacking2

William 'MindWorX' Mariager

Sounds like a simple thing in my head, but I haven't found any straightforward tutorial on it. :)

user92578

@JoshPetrie And it's used by the renderer?

Anko

16:49

Here's an attempt at a canonical "Where can I ask open-ended questions instead?"-reference. Have I missed any big sites from the list?

AttackingHobo

@William'MindWorX'Mariager this might help archive.ncsa.illinois.edu/Classes/MATH198/townsend/math.html

Stack Exchange

2

Q: Where can I ask open-ended questions instead?

GDSE is not a discussion forum—we discourage questions that are primarily opinion-based or that aim to generate discussion, because they don't fit the Stack Exchange format. However, even if they don't fit here, they might still be good questions. Where could such questions go instead?

discussion off-topic

AttackingHobo

@William'MindWorX'Mariager look at things dealing with billiards physics as those tend to be very well done with rotation conservation and very accurate sphere collisions and reaction

Almo

strawpoll.me/3194831/r poll about your Rad Stacking habits

William 'MindWorX' Mariager

@AttackingHobo I'll take a look. :)

AttackingHobo

16:52

@Almo its possible to let it bump 0 times :)

Almo

hahah ooops!

AttackingHobo

also you linked the results page

Almo

user image

AttackingHobo

:0

Almo

"D

AttackingHobo

16:54

^ King of Rad Stacking

Jon

you know what they say about guys that get good at rad stacking

Almo

hahaha

AttackingHobo

@Almo didn't upload this yet(obviously) but what do you think?

user image

Almo

it looks cool, but it lacks clarity. So I'm not sure one way or the other

AttackingHobo

Yeah. prob gonna remove the DOF

Almo

16:55

DOF makes my eyes try to focus when it's a static scene like that

AttackingHobo

user image

Almo

looks like a city :)

I couldn't play 3D Dot Heroes because my eyes kept trying to focus the depth of field

user4704

The Winter Refactor for 2014 is on.

10

AttackingHobo

Good point. I will remove the DOF when I get home today

Almo

some people may like it though

this is also why I disable translucency on windows in Windows.

Stack Exchange

16:57

1

Q: The 2014 GDSE Winter Refactor

It's everybody's favorite time of year again. The celebration of hats, of course! Last year, we organized a community "refactoring" event aimed at bringing some much-needed attention to the old, unloved, neglected questions on the site. It was a lot of fun and produced some great results, so we'...

discussion winter-refactor-2014

Almo

@AttackingHobo you might want this: Screen.showCursor = false;

my wife was trying to put the mouse pointer where she wanted to drop the blocks

AttackingHobo

@Almo LOL that is one of the only things that people sometimes do.

I might have to put some instructions :(

Almo

yeah :)

user92578

how can I edit "my tags"?

AttackingHobo

Touch/Tap/Click anywhere

Almo

16:59

or get rid of the mouse pointer once they start

then they shouldn't be trying that :)

AttackingHobo

@Almo people do it on mobile as well

Almo

ooohh right

Anko

@Tyyppi_77 i.imgur.com/PtzpD47.png there's an edit link

Almo

optical illusion on the game over screen text looks crooked because of the slant of the "ground" (just an interesting observation)

AttackingHobo

@Almo hahahha it does!

Almo

17:00

:)

AttackingHobo

I might make some 3d game over text that is aligned to the game board

or maybe might put the score on the bottom of the stack. IDK

Or on top. little hvoering number

also a 3d high score line

so you can see when you are about to hit your hs

and if you go higher than it you bring it up

@Almo Looks like the right side is drooping

Almo

no no no the damned ticket thing put me in wheelchair

fuckfuck

AttackingHobo

?

Lokkij

??

Almo

sorry i fucking hate Evenko's site

Pip

17:45

I gots a free class period!

Also: @Serial is that progress on a game that I see? Perhaps Necromonster?

Joe

18:18

@AttackingHobo this picture just really reminds me of sea monkeys for some reason

Lokkij

user image

How would I do this in Unity?

AttackingHobo

@Joe Sea monkeys? Those micro shrimp things you grow?

@Lokkij 3d 2d?

Joe

yes lol

Lokkij

@AttackingHobo In 2D

Joe

i had a fish tank with those oddly colored fake "corals" and some sea monkeys and crazy color gravels

and thats exactly what that picture of your game reminds me of

Pip

18:20

lol

Lokkij

Note the collider could be more complex than a rectangle, so determining the edges with the size and position of the collider doesn't really work

AttackingHobo

@Lokkij break this problem down into smaller problems

Figure out how to isolate that one line you hit

Pip

hey @OliverSalzburg

sup

AttackingHobo

Figure out the intersection point

Oliver Salzburg

@Pip Nothing, just got home :)

AttackingHobo

18:23

Get the distance between the intersection point, and the top most point, and then do the same for the lower most point

Pip

:)

Lokkij

@AttackingHobo What do you mean with the intersection point? The coordinates of hit?

AttackingHobo

@OliverSalzburg you should check out this game I've been working on. pretentiousarts.com/RadStacking2 all the cool kids are playing it.

@Lokkij I Haven't worked to much with unity's collision system

Joe

@Lokkij I would start looking at that hit object but im not sure exactly if its going to contain everything you need

Lokkij

@Joe The information I have to work with is basically the point where the ray hit, and the normal of that point.

Joe

18:27

and you said your objects are irregular

not all rects?

Lokkij

Yep. Can be hexagons or other more interesting shapes, though it'll all be straight lines.

Joe

can you find the nearest two vertices to your hit ?

Lokkij

Would Vector3.Cross(hit.normal, Vector3.up) give me a vector parallel to the hit line?

@Joe I don't think so; this is all the information I have.

Joe

what i was thinking is you might need to build something to find those

because that should be what you are looking for

or if you can get the edge you hit, and then grab its verticies

Lokkij

Hmm.

Maybe send out a bunch of rays to determine the edges?

Joe

18:39

docs.unity3d.com/ScriptReference/NavMesh.FindClosestEdge.html

I dont know if this applies or is relevant, but something like that is what id want to use

AttackingHobo

@Lokkij take a step back and describe why you need to do this in gameplay terms.

Lokkij

@AttackingHobo I want to create circles bouncing off of the hit wall with the center hit, and those circles shouldn't go farther than the nearest edge of that wall.

@Joe That does look promising, though I don't think I'm working with NavMeshes.

AttackingHobo

Are the objects moving @Lokkij?

Lokkij

@AttackingHobo For the time being, no.

AttackingHobo

@Lokkij what kind of shapes do you have?

Lokkij

18:46

@AttackingHobo Mostly large polygons, though we might add spherical objects later.

AttackingHobo

@Lokkij use 2d coliders and use PolygonCollider2D.points to grab the points

its an array of vector 2s

Lokkij

Hmm, that's promising! Thanks!

Pip

whoo I got a hat for doing nothing except for what I always do: vote on interesting questions

Lokkij

Now your hat has a hat!

Pip

yep

hatception

I remember @Blue and I wearing top hats on our top hats last year

AttackingHobo

19:16

Figured out that I can view my own panoramas or spherical 360 photos in Gear VR

AttackingHobo

19:54

sup @AidanMueller

Pip

backs, at home this time

Pip

20:20

holy crap youtube why

these are all SFW :P

Lokkij

Damnit Pip.

Stop posting bad parodies.

Pip

:D

here, have something that isn't a parody:

:P

Lokkij

Are bagels popular in the USA?

Joe

i cant speak for the rest of the country... but on the east coast they are

and not so much as "popular" but maybe "common"?

Lokkij

Interesting. That explains the 'bagel' mode on this toaster.

Joe

20:29

when i eat breakfast... 75% of the time its a bagel and coffee

but thats because im always on the road always have no time to get real food

which i think is a pretty common feeling here

Lokkij

What do you consider 'real food'? Most people here either have a few slices of bread or some yoghurt for breakfast.

Jon

Soylent Greens

Joe

lol

a "healthy breakfast" is like eggs fruit/yogurt and juice

what i want is eggs bacon and coffee

Lokkij

Huh. That seems expensive.

Joe

healthy is more expensive here typically

Lokkij

20:34

I'm pretty sure that's true almost everywhere.

Or at least cheaper -> less healthy

Though I have heard horror stories of vegetables being very expensive in the US.

Pip

not really, no

Joe

i mean its weird im super lucky to have what ive got, i cant speak to them being "very expensive"

Pip

some of the less-common ones here, yes, but that's not evry many

yeah

Lokkij

Hm. Those people probably just visited the wrong shops then.

Joe

but there are plenty of people on welfare / unemployed whatever... and they just feed their kids off the dollar menu at mcdonalds 7 days a week

Lokkij

20:38

Ouch.

That's pretty terrible.

Joe

then we wonder why theirs such a large childhood obesity / health issues here

Pip

there's people like that everywhere though, to at least some extent

there will always be a part of the population considered "poor"

Joe

true, but i mean if you can get 3 hamburgers for 3 bucks and your strapped for cash... your not buying fresh veggies

Pip

yeah, that's true

Lokkij

Wait so all those kids have for dinner is a single $1 hamburger?

Joe

20:40

im not speaking literally

im just saying i have worked in fast food and i have friends who still do

Lokkij

Oh okay. phew :P

Pip

just a relevant article: businessinsider.com/…

Joe

and there are plenty of regulars

Lokkij

Ohh I love avocados.

Pip

Holy crap the poverty line in Hong Kong is a lot of food

that's like two or three meals

Lokkij

20:43

The link doesn't work for me. :(

This does though: thepovertyline.net/map

Pip

yeah, that works

Lokkij

Very cool.

Damn, I had no idea apples are so expensive.

Sadly it's not all that accurate.

A loaf of bread doesn't really cost $4.91 in the US, does it?

Pip

it can, depending on the bread

common off the shelf bread, no

some fancier stuff can

Lokkij

Well yeah, but if you're living on the poverty line you wouldn't buy that expensive bread.

Pip

true

Lokkij

20:51

Whatever. It's a pretty interesting project.

Pip

definitely!

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Transcript for

Dec '1415

Game Development

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