Download "Unreal Engine C++ Persistence #3: "Create Unreal Engine Project"
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Video tags
Subtitles
Russian
00:00:00
in this video we're going to go ahead00:00:02
and create our project that we're going00:00:03
to use for our persistence00:00:05
and what i'm going to do is use a third00:00:06
person project called the template00:00:09
so i'm going to go to games next third00:00:12
person00:00:13
a plus plus and give this the name of00:00:16
persistence00:00:19
we'll do uh persistent for short00:00:22
and create the project alrighty00:00:25
everything is created00:00:27
and the project is syncing up inside of00:00:28
rider00:00:30
so what we're going to do now is i want00:00:31
to go ahead and turn off the vr plug-ins00:00:33
because i do not like this appearing00:00:35
every single time i launch the game so00:00:37
i'm going to go to settings00:00:38
plugins search for vr and uncheck00:00:41
oculus and steam i'm not too worried00:00:45
about it i'm going to go ahead and leave it just hit save all00:00:47
click this little doom digger down here00:00:51
like i can have that view for my content00:00:53
browser00:00:55
and close down the empic00:00:59
launcher we go to games00:01:02
source then the project name we have all00:01:05
of our code that we need00:01:08
and we are pretty much ready to go00:01:12
so we need to kind of try to take a step00:01:14
back and think about this00:01:16
so whenever the client loads into the00:01:19
game so we're going to be testing00:01:20
just strictly dedicated we want the00:01:24
post login function to fire00:01:27
so what post login is is let me actually00:01:30
create a blueprint game mode real quick00:01:32
so blueprint class gamemode base00:01:36
example gamemode00:01:40
load that on up and i want to set that00:01:42
as the00:01:43
default so this is just temporary00:01:47
where is it there it is example game00:01:49
mode00:01:50
and in the event graph i'm going to00:01:52
override00:01:54
some functions here so let's override00:01:57
post00:01:59
i guess it's called onpostlogin and00:02:00
blueprint and it takes in a player00:02:02
controller so i'm going to print string00:02:06
and show you kind of how it works so00:02:09
when i play as a listen server00:02:11
it goes through and it fires when i play00:02:15
wait no now i'm playing as listen server00:02:17
it fires when i play as a client for a00:02:19
dedicated server00:02:21
once i load in it should still fire00:02:25
i guess i have to select the default00:02:27
pawn real quick00:02:30
i guess it's i think it's you00:02:33
persistence tutorial00:02:34
character maybe no00:02:37
it's the third person character isn't it00:02:41
there we go so that creates it as well00:02:45
and if we have more than one client00:02:50
it happens twice so each time a client00:02:52
loads into the game00:02:54
well let me rephrase that on the server00:02:56
anytime a client makes a connection to00:02:57
the game00:02:58
post login is going to fire so that00:03:01
allows us to get00:03:02
information that we need from that00:03:04
client so when he loads in00:03:06
we can a check if there's an entry with00:03:10
his information already in it00:03:11
if there is not we create that entry in00:03:14
the database00:03:15
if there already is an entry with that00:03:18
information in it00:03:19
what we do is we retrieve that00:03:20
information and use it00:03:22
so for example let's say i've already00:03:24
been in the server00:03:27
and00:03:30
i logged out of the game up here so00:03:33
what's going to happen00:03:35
is i redrawn the server so i press play00:03:37
i rejoin00:03:38
post login runs goes out to our00:03:42
api goes to the database says hey this00:03:46
guy's been here before00:03:47
grabs our x y and z coordinates goes00:03:50
back to the api00:03:52
goes back to the game in which case it's00:03:55
going to00:03:56
spawn our character up here00:04:00
where we actually logged out and then we00:04:03
go00:04:04
from there all we do is we simply00:04:05
possess that character00:04:08
so that's pretty much the way that this00:04:09
is going to end up being handled so00:04:12
we have to figure out exactly00:04:16
what we want to do for this so first00:04:18
things first obviously we want to do00:04:20
location00:04:21
so we want to have we probably end up00:04:24
creating a custom let's actually go00:04:26
ahead and do that let's create our00:04:27
custom class00:04:29
this is just going to contain any00:04:31
information we need such as the00:04:33
structure we want to00:04:34
create actually for now let's think i'm00:04:37
trying to think about what the best00:04:38
route to do this would be00:04:41
so let's see we want to00:04:45
create struct with00:04:48
information to be passed00:04:52
to api00:04:55
trigger so if00:05:00
player not bound upon joining00:05:04
create new entry return00:05:10
nothing00:05:13
if player found upon joining00:05:18
read return00:05:21
all information apply all information00:05:25
to spawned on00:05:31
and then we possess it00:05:34
so that's kind of the gist of it00:05:38
so we're gonna have to go ahead and00:05:40
create the struct00:05:42
in which case i think it's probably best00:05:44
we actually use the default game mode00:05:46
that comes with it00:05:48
i'm gonna load up the game mode00:05:51
that came with the project and we're00:05:53
going to override post login so we're00:05:55
going to do virtual00:05:56
void post login00:06:00
takes in a player controller00:06:03
generate the implementation00:06:07
and we want to call super new player00:06:11
sorry super post login and pass in00:06:14
new player so we already have our00:06:17
default pawn00:06:18
set which in this case it's our third00:06:21
person character blueprint00:06:24
so from here we want to do our check so00:06:27
let's comment this out00:06:29
so let's do00:06:35
what was i thinking uh we're gonna do a00:06:38
post00:06:39
request no sorry do a get00:06:42
request through api00:06:46
passing in i00:06:50
player id00:06:57
i'm running the same thing so if00:07:00
no result bound construct00:07:04
new entry and database00:07:09
if result found return00:07:14
completed struct00:07:17
so we're gonna have to parse through00:07:21
our struct now there's something we have00:07:23
to grab00:07:24
or sorry include as well and i did this00:07:27
inside of the word of war tutorial i00:07:29
cannot remember exactly00:07:32
what all it was but it was so we want to00:07:35
add00:07:36
http json and json utilities00:07:41
to our build.cs so we've got the project00:07:45
name.build.cs00:07:47
and at the end we just add http00:07:50
json and json utilities and that'll00:07:52
allow us to make00:07:53
http hits as well or sorry requests00:07:57
as well as use json objects well just00:08:00
their provided json tools so pretty much00:08:02
we're going to be receiving00:08:04
the information that we get back from00:08:06
api as a string00:08:08
so if we look back here we're going to00:08:11
receive something00:08:12
that looks just like this00:08:17
and it's all going to be text so they00:08:19
provide00:08:20
functions that allow us to take00:08:23
this object here and convert that into00:08:26
an actual struct00:08:28
so i'm going to go ahead and create that00:08:30
struct00:08:32
it right up here so it's going to be a00:08:35
use dract00:08:36
i think it has to be blueprint type00:08:40
b struct f00:08:43
player data00:08:46
and we want to have the information that00:08:49
is stored inside of our00:08:51
uh whatchamacallit here so what we want00:08:54
to pass in well first off we do generated body00:08:57
and we also want to do x chord y chord00:09:01
and z chord so we have a float00:09:04
x chord set that00:09:08
to zero by default float y accord00:09:13
zero by default and float z chord00:09:17
and set that zero by default00:09:20
so when we pass and receive we're pretty00:09:23
much all we're going to be doing is00:09:24
passing in00:09:25
a string version or a json object00:09:28
version of the struct00:09:29
and same thing when we go to receive it00:09:31
we're receiving a json object that we're00:09:32
going to convert00:09:33
into this struct so really that's all00:09:36
we're going to be doing00:09:38
for now i'm going to print out the00:09:39
loggers to make sure this works so uv00:09:41
log00:09:42
log temp warning00:09:45
text post login running00:09:49
just to make sure so we can use00:09:53
everything there00:09:56
and in the next video we will actually00:09:58
start trying to make the http00:10:01
request so let me relaunch the project00:10:06
i'm gonna go through and set the game00:10:09
mode back00:10:11
so let's see it was persistent tutorial00:10:14
game mode00:10:16
check the output log00:10:20
and post login running so00:10:23
there we are00:10:26
so we know we are good to go we no00:10:29
longer need our little blueprint example00:10:30
game mode00:10:34
and we are now set up to begin so we can00:10:37
in the next video00:10:39
construct our json object make the http00:10:42
request00:10:44
and go from there but first what i want00:10:45
to do is simply do a get request00:10:48
i'm talking about the next video a get00:10:50
request just like this00:10:52
so when we send it and i just realized00:10:56
this is not running when we send it00:11:01
we receive just an array of json objects00:11:06
or better yet in the next video as well00:11:08
we're actually probably going to do a00:11:09
short one where we do a simple get00:11:11
that takes in a an id so that's going to00:11:14
be uh00:11:15
so instead of returning an array it just00:11:17
returns a single object00:11:19
like what i have highlighted here so00:11:22
that's gonna be it for this video if you00:11:24
like what i'm doing anyone help support00:11:25
me you can find a link to my patreon00:11:26
down in the description below00:11:28
and if you have any questions or00:11:29
anything like that feel free to join my00:11:31
discord that's also linked down in the00:11:32
description00:11:34
if you decide to join my patreon i have00:11:35
a team deathmatch series just for00:11:37
patreons00:11:38
where we create team deathmatch using c00:11:40
plus with unreal engine as well as00:11:41
create a bunch of other miscellaneous00:11:43
features00:11:44
such as custom or custom spawn points00:11:46
that allow you to spawn farthest away00:11:48
from the enemies to prevent spawn00:11:50
killing00:11:51
and a weapon customizer to allow you to00:11:53
add and remove attachments to your gun00:11:55
so i'll see in the next videoDescription:
Patreon: https://www.patreon.com/SneakyKittyGaming Discord: https://discord.com/invite/W5g6pZXfjh In this video we create our Unreal Engine project to use for testing along with some explanations on what we will be doing.
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