Game Development

Sie

20:07

@jgallant You mean back when you had to walk up the hill? Both ways? In the snow?

Stack Exchange

0

Q: What strategies are best for managing Game Center and off-line games in the same app?

I have an iOS app for which I want to use the Game Center API for saving games. But at the same time I want to have the option to save multiple games on the local file system using the familiar save-slots mechanism. I anticipate that a user may not wish to use the Game Center, or may wish to supp...

jgallant

yeah, during the day, they would displace all the dirt

so we would have to walk back uphill on the way home

then at night, they would reverse it back

They did this because of the bible.

that's why I went to night school

DukeZhou

20:29

fortune.com/2017/01/19/zuckerberg-compound-hawaii

(I do admire Zuckerberg's pluck. Jobs only had the one mansion in Palo Alto as far as I know, and to my recollection it was only medium sized.)

jgallant

20:47

Almo

looks pretty good

jgallant

its a start

Almo

yeah

if you can make it look interesting to drive a rectangle in an empty screen, you have something

jgallant

oh

Almo

supposedly Criterion tried to make sure it was fun to shoot the weapons in BLACK in an empty room

jgallant

20:48

I have a ridiculously good idea

Almo

I liked BLACK

no puzzles, no hunting for anything, no fucking jumping... just shooting stuff and trying not to get shot

jgallant

Well I'm first and foremost making this game for me and my son

Almo

good place to start man

jgallant

We are gonna coop drive this car together

Almo

hahah cool

yahoo5000

20:49

Whats the good way to determinate witch direction mouse are moving ?

Almo

keep the mouse location to the next frame and compare

jgallant

yeah, deltamouse

Almo

average it over a few frames if that latency won't hurt you

jgallant

a cool way to do it , is to keep track of a magnitude vector between the previous and current swipe positions

and directino vector

Speed and direciton

Almo

how important do you think it is in a game with a music mute button for the app to detect if the user is already playing their own music and mute it for them?

Sie

20:51

Man I strained my chest (core) like 3 days ago and it hurts like hell still. At first I was worried it was my heart but they did an ekg and blood pressure test and I was fine. So they just gave me some steroids and muscle relaxers.

jgallant

@Almo everyone is freaking out for this on PT

Sie

Problem is I can't really rest it since it's always in use basically.

Almo

PT?

jgallant

Its a Unity thing

Picross Touch on android

Almo

oh right

wait PT has music?

jgallant

20:52

no, it cuts off music when it starts

Almo

oh ok

ours leaves their music running, but keeps its own music running, too

so they're both playing

Stack Exchange

0

Q: Need help solving EventHandler issue

I have an issue with my EventHandler for Key events in my game. The specifics are in this forum thread: http://www.java-gaming.org/topics/problems-with-key-event-handling/37998/view.html Basically, the issue is that a KeyReleasedEvent is fired in a very inconvenient way. I recently switched fr...

java input events keyboard

0

Q: How can I easily render Box2D polygons with ShapeRenderer in LibGDX

In the PolygonShape object, there is the method setAsBox(); which allows for creating rectangles easily, but there is no getAsBox, in the case where you know a polygon is a box. I know Box2D comes with it's own renderer, but I need to make more custom renderings. Also, PolygonShape objects have...

java libgdx box2d jbox2d

jgallant

i don't know why mine cuts off

You have to go back into spotify or whatever, and hit play then switch back to the game

Almo

wow that sucks

yahoo5000

@Almo is this right ? pastebin.com/w4ceCWfg

Vei2 is typedef _Vec2<int> Vei2;

Almo

21:06

no looks like you're updating both in the same frame

yahoo5000

no i am updateing MousePos only if MouseMove is true so each second frame

Almo

but you're getting the mouse coords and putting them into mousemove THEN comparing mousemove to the current mouse coords

yahoo5000

or i am wrong ?

Almo

if m_lastMouse is a vector with the coordingates it's like

yahoo5000

ok to check if current cordinates are same ?

Almo

21:07

difference = currentmouse - m_lastMouse;
m_lastMouse = currentmouse;

yahoo5000

how to do this , now i see that i am capturing both at the same frame

Almo

like I said. compare current value to the stored value THEN update the stored value

yahoo5000

like this right pastebin.com/3pCBC6xq

Almo

pos is the difference between the last mouse position and the current one

it's not a position, so the variable is named wrong

yahoo5000

pos is position of camera so i am adding difference between them

Almo

21:17

ok I can't help there since I don't know how you've defined "camera" etc.

yahoo5000

i just start making camera

pos is position of camera

Almo

ok what you have might work

it could be backward, like the sign might be wrong, but I think you'll get something resembling camera movement from it

yahoo5000

doing last changes and wil ltest

Blue Bug

wooyeah. R u starting 3D programming? Vei2...? What is this? Never seen Vei2 on either XNA OpenGL DirectX libs...

Vei2... RectI...?

R u building these data types by yourself? @yahoo5000

Almo

it's a vector 2, looks like

yahoo5000

21:30

VeI2 is 2D vector type int

RectI is rect int

Almo

I don't recommend using your own vector types

yahoo5000

u mean vector class ?

Almo

you're going to get better support and features from whatever types are already in the lib you're using

Blue Bug

why r u using inted vector and inted rect?

yahoo5000

cuz its templated class based on type

float int double

Almo

21:32

but why

what's wrong with float or double

Blue Bug

Ok. Let me rephrase it... Why are you not using floating(or double as Almo said) type?

yahoo5000

in vectors ?

Almo

the vectors in Unity take non-integers as their arguments

Blue Bug

Why are you intentionally not using float/dobule? Is there a reason that you chose not to use / disregard decimal data type?

yahoo5000

when i need floats i am using floats when i need ints i am using ints , when i need vector int i using that and when i need vector float i am using float

i dont understand what you saing :D

Blue Bug

21:35

Almo

why do you need an int for working with the mouse?

yahoo5000

like vector int ?

Almo

yes

yahoo5000

instead of int x, int y ?

Sie

Wait Spongebob! We have technology!

►

Almo

21:36

no

Vector2 { float x; float y; }

why int

yahoo5000

why floats ? i dont need floats at this metter

cuz i am dont calculating half of pixels

Blue Bug

I made a robot to help me argue on the internet

►

yahoo5000

only full pixels i would use float if i would calculate player movement

Sie

Jesus.

Almo

you don't lose anything by using the built in float vector and just putting the float values in to your player position, and letting that truncate to int if it wants

yahoo5000

21:39

u mean build in standard library ?

Almo

yes

yahoo5000

i never heard of those kind vectors

Blue Bug

Just not use your own data type for now @yahoo5000 because there exists data types built for game for a reason and by good design.

yahoo5000

std::vector ?

nah

Blue Bug

First of all, are you using Unity? What is that you are building your stuff on?

yahoo5000

21:40

i dont

@almo

how to find those vectors

whats the call

not stl containers

Almo

I don't know what library you're using

yahoo5000

u said they in standard library

Almo

I don't know what you're working with

you got an engine or soemthing?

yahoo5000

custom framework

i replayed to you blue bug

Almo

fucking annoying C++ calls a List a Vector

yahoo5000

21:43

you just changed the text you was asking

Almo

makes it hard to search for info on actual mathematical vectors

Blue Bug

lmao

yahoo5000

@BlueBug as i said i am not using unity and using custom made framework

Almo

looks like in C++ you're not given 2d coordinate data type

so you get to write your own, or find one in a library

not even in std::

yahoo5000

yea thats what i did

Almo

21:44

well, don't do it with integers

:)

yahoo5000

ok tnx for help

Almo

sure

yahoo5000

@Almo

that mouse drag seems to be working

tnx for that one too

Blue Bug

Man this whole month had been totally gloomy outside. I would kill for one sunny day.

yahoo5000

are u from england ?

Blue Bug

21:49

#sunniest_day_of_this_month

Stack Exchange

0

Q: How does one calculate the surface normal, in 2D collisions?

I have been pulling my hair out trying to work out a generic normal-finding algorithm. In my game/sim, I have a ball, which should reflect away from any surface it collides with. Everything I can find on google has suggested to simply check for the walls orientation (hits left, handle left refl...

2d mathematics vector normals reflection

Almo

@yahoo5000 sure

DukeZhou

@BlueBug you gotta look into moving to Southern California!

Blue Bug

man I would love to

Almo

I didn't understand the song "here comes the sun" until I lived in the UK for a few years.

DukeZhou

21:55

Try the Pacific Northwest

if you like constant drizzle and little sun

(Never seems to rain very hard out there though, as opposed to the Atlantic coast where you get drenched to the bone in under a second)

Bálint

@BlueBug Man, this whole month had been totally icy outside, I would kill for one day I don't slip every 2 minutes

It snowed on 5 consecutive days, then it rained 5 times in a single day, each time having a short sunny break in the middle.

Then back to -10--15

Blue Bug

Ding! Ding! Ding!

Can I edit my edit?

gamedev.stackexchange.com/review/suggested-edits/65096

I realized that he was asking how to get normal out of what he has, my edit makes him as if he is just mindlessly throwing questions. I should add something like " I have these but I do not know how to compute normals based on the collision"

Bálint

I may be able to answer that

Blue Bug

I too!... but I am too lazy and I am too tired anyway...

so I will hand over this sweet fake internet points to you @Bálint

@DukeZhou I am not like super into sun but as Balint said, when it is gloomy outside for whole month, you really start to miss that warmness on your skin man. For now I would kill for even a drop of sunshine, and sell my soul for "drizzle of sunshine"

DukeZhou

I feel you Blue Bug. I feel you

Blue Bug

22:11

@Bálint its cuz global warming man. Global warming is such a bbbaaaatch. I am sure somewhere some other place folks are suffering from hellish rain of sunshine, praying for rain or one single cloudy windy weather.

@DukeZhou BlueBug not "Blue Bug". " " is a big difference of 0x20 VK_SPACE 32 ASCII.

DukeZhou

good point!

Blue Bug

There is also a very influential personality @blue on this chat

haven't seen him a while though.

DukeZhou

probably feeling a little blue

Hey, anyone have any thoughts on good places to promote an original game? We launching our Alpha in about a month, and want to restrict it to uber geeks, boardgamers, and the like for a while

(The game in question is very simple on the surface--think Chess or Othello--but the strategy is nuanced and interesting)

Probably going to reach out to computer game clubs at universities and such

boardgamegeek is another place I'm thining about (even though they seem to be mainly interested in physical games, as opposed to electronic, but our game requires a gameboard that can do simple processing)

Almo

you have any idea how annoying it is to have stuff like that sitting on the screen?

Blue Bug

post more info here with a link? Ping me when you do so because I might peace out for now.

DukeZhou

22:20

You guys will be the first to know when we go live

Blue Bug

sorry @Almo

um can we hide it or delete it? I tried to delete it but too late.

DukeZhou

it's actually kind of growing on me...

Almo

it's not against the rules, but use judgement in the future :)

Blue Bug

let me report this see if that works out

DukeZhou

Now I'm playing Rick Astley in the background as a score for the image

it's actually kind of groovy

Blue Bug

22:23

@Almo DONE!

<3<3 moderators ty!!

Madara Uchiha

You're welcome ❤️

Blue Bug

:D

Stack Exchange

22:36

0

Q: Texture filtering of look-up table in post process shader

I am doing post processing by drawing to an FBO and then applying a certain fragment shader when drawing the FBO's texture to the screen. I want to use a look-up table texture to apply color grading. Since I am targeting OpenGL ES 2.0 and possibly older PCs, I cannot use 3D textures. Instead I ca...

opengl glsl opengl-es2

Sie

23:23

What do you guys suppose would be the best way to control two vertices at once? Currently the way I have it setup is I shoot a ray, get the mesh, and find the vertice. However I'm not sure how I should go about controlling two at once. Should I like try to find the next closest vertice or store the first?

Code: pastebin.com/b8vtyse4

Stephane Hockenhull

23:36

In what context?

Sie

Real time (in-game) mesh manipulation.

Stephane Hockenhull

So, translate it along the surface of a plane made up of the vertex A -> vertex B vector normal with vertex A (or B) as the plane origin?

Can you find the closest edge?

Sie

Basically I want the player to be able to control the two vertices in yellow using that line or space in grey:

Since a mesh is made up of triangles though I'm not really sure if I can search along an "edge".

Stephane Hockenhull

You could build an edge table that tells you which edges of the triangle are "real" edges

Then raycast to the triangle, and find which of the one, two, or three valid edge is the closest.

Other option is to build a adjacency map/table and check adjacent triangle normals to figure out if the angle is large enough to count as an edge (dot product of triangle normals is < cos(angle) )

your map tells you for each triangle, who the neighbor triangles are for edge A, B, and C. You then take the normal of both triangles (cross product of two of the triangle's edges) and do the dot product

if both triangles face the exact same way, the dot product should be 1 (within rounding errors) which is equal to Cosine(0 degrees)

if both triangles face at 90 degrees the dot product will give you 0 (Cosine of 90 degrees)

at 45 the dot product will give 0.7something (again, same as Cosine of 45 degrees)

Watch out for degenerate triangles. That could give you divisions by zero or NaN when figuring out the normals.

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