because it is far nicer to see for a developer
#help-development
quiet ice
drowsy helm
its more compact
quiet ice
You have no idea what the decimal value of 2^31 is, but you instantly know what 0x7F_FF_FF_FF is
drowsy helm
no
grim ice
i dont get it
drowsy helm
i'd suggest reading into different base number systems
grim ice
thats what im trying to do but i dont get it
quiet ice
0x7_16_16_16_16_16_16_16
Yep, you are fucking
drowsy helm
it's a bit hard to explain just in a few sentences
grim ice
why is it 7 and 7 16's
grim ice
yes
quiet ice
0xb means "everything after it is binary"
drowsy helm
7FFFFFFFF is the same as 34359738367
grim ice
what
quiet ice
so 0xFF is 0b1111_1111
grim ice
but thats past integer limit
tardy delta
🤔
drowsy helm
so every place in a hex digit is 16^n
grim ice
so its
quiet ice
converts hex into binary (rather easy), then binary into decimal (not so easy)
grim ice
16^16^16 etc
quiet ice
Meh
forest path
Hey, does anyone know why pushEntities is called when isCollidable is false? (For a LivingEntity)
It's a problem for big mob farms.
quiet ice
0xFF = 15 * 16^1 + 15 * 16^0 = 15 * 16 + 15 = 255
drowsy helm
if i want to convert for example F13FE to base 10 i would do
16^4|16^3|16^2|16^1|16^0
128 |64 |32 |16 |0
and times each value by the corresponding column
quiet ice
F is 15
grim ice
what
quiet ice
16 would be 0x10
drowsy helm
thats all the digits in hex
drowsy helm
no 10 isnt a digit
young knoll
10 is 2 digits
quiet ice
0 = 0x0
1 = 0x1
2 = 0x2
...
10 = 0xA
11 = 0xB
12 = 0xC
13 = 0xD
14 = 0xE
15 = 0xF
young knoll
Believe it or not
young knoll
In base 10, 10 is 10
grim ice
and 0x10
quiet ice
0x10 is 16
grim ice
my brain
young knoll
In base 16, 10 is 16
drowsy helm
dont think of A,B,C as letters
grim ice
how does it exist
drowsy helm
they are numbers aswell
grim ice
yes
quiet ice
Do you understand binary?
grim ice
not really
quiet ice
Bummer, if you did it would've been easier to convert hex into bin and back
drowsy helm
16^4 |16^3 |16^2|16^1|16^0
65536|4096 |256 |16 |1
F 1 3 F E
15 1 3 15 14
=
983040 + 4096 + 768 + 240 + 14
=
988159
Thus (hex)F13FE = (dec)988159
so you are multiplying each number's place by 16^n (n being it's place) and adding them together
quiet ice
^
grim ice
its read right to left?
quiet ice
Well, like dec and binary the symbol with the highest value is the leftmost
young knoll
```
16^4 |16^3 |16^2|16^1|16^0
65536|4096 |256 |16 |1
F 1 3 F E
1...
E is 5 now?
quiet ice
E would be 14
drowsy helm
14
young knoll
I saw that edit :p
drowsy helm
shh
grim ice
that makes sense
drowsy helm
its the same with binary
grim ice
but why is 10 not a 1 and a 0
drowsy helm
10 = A
grim ice
didnt 10 mean 16
drowsy helm
lemme write a table for 10
wet breach
converts hex into binary (rather easy), then binary into decimal (not so easy)
binary to decimal is easy
you just need to learn the trick to converting between bases
binary is base 2 decimal is base 10
drowsy helm
16^4 |16^3 |16^2|16^1|16^0
65536|4096 |256 |16 |1
1 0 (HEX DIGIT)
16 0 (DEC DIGIT)
=
16 + 0
=
16
and give me a minute
quiet ice
And what is this tick?
wet breach
and I will teach the easy method
drowsy helm
1x(16^1) + 0x(16^0) = 16
young knoll
Isn’t the easy method to use an online converter
quiet ice
Right now I only know that you can consecutively divide by 2, but that takes ages to do
drowsy helm
its the same method for binary except you use base 2
so each digit in hex is 16^n-1, binary is 2^n-1
quiet ice
Oh no, bin -> dec would be multiplying
wet breach
First, divide the number by the base to get the remainder. This remainder is the first, ie least significant, digit of the new number in the other base
Then repeat the process by dividing the quotient of step 1, by the new base. This time, the remainder is the second digit, ie the second least significant.
Repeat this process until your quotient becomes less than the base. This quotient is the last digit, ie the most significant digit.
n being the place
wet breach
It is that simple 🙂
quiet ice
That is how it works with dec -> bin/hex, but not bin -> dec iirc
At least, that is not how I have done it
drowsy helm
yeah the base^n-1 rule is only for decimal
drowsy helm
yes
quiet ice
But eh, bin -> dec is just a lot of addition, not complicated just takes a lot of time
wet breach
so lets say we want to convert 1208 to base 26
quiet ice
no, decimal
drowsy helm
once you get the initial concept its the same for all bases
wet breach
this is the math for it
grim ice
whats a demical
quiet ice
0-9
drowsy helm
decimal is referring to our base 10 system
young knoll
Because it's base 16
grim ice
so for base 64
grim ice
its 64*
quiet ice
Let's use regex:
bin = [01]+
oct = [0-7]+
dec = [0-9]+
hex = [0-9A-F]+
grim ice
or am i dumb
sage dragon
if (!(plugin instanceof org.bukkit.plugin.Plugin) || !(plugin instanceof net.md_5.bungee.api.plugin.Plugin))
return false;
Will this throw any exceptions, or will it work just fine?
grim ice
hex allows anything from 0 to 16
bin from 0 to 1
oct from 0 to 7
dec from 0 to 9
?
drowsy helm
yeah
quiet ice
hex allows anything from 0 to 15 (both inclusive)
quiet ice
it's A
drowsy helm
10 isnt a digit
grim ice
then how do u say 16
young knoll
10
quiet ice
0x10 (hex) = 16 (dec)
grim ice
f is 15
grim ice
0x10 (hex) = 16 (dec)
then
drowsy helm
sorry im wrong lol
young knoll
10 isn't a single digit though
It's 2, just like in decimal
0-F are all single digits
quiet ice
in hex that is
grim ice
hex allows anything from 0 to 15 (both inclusive)
hex allows anything from 0 to 15 (both inclusive)
0x10 (hex) = 16 (dec)
how
what
quiet ice
Well, per character
grim ice
so 10 is an exception
grim ice
its 2 characters
quiet ice
1 would still be between 0 and 15 and 0 would be still between 0 and 15
so still valid
grim ice
1*(16^1) = 16
0*(16^0) = 0
but then u can get rid of 0
quiet ice
no you cannot
drowsy helm
thats like saying you can remove the zeros from 100 because its the same
quiet ice
For example 100 (dec) is not 1 (dec)
quaint mantle
does anyone know a certain particle thats white-ish that doesnt move
just falls down
grim ice
is there a 0 in hex
drowsy helm
yeah 0
drowsy helm
if you're talking hex 10 will always = 16
if you want decimal 10 in hex it would be A
drowsy helm
no the digit placement matters a lot
drowsy helm
= 1
drowsy helm
1x(16^1) = 16
1x(16^0) = 1
16+1 = 17
drowsy helm
the table method helps a lot
drowsy helm
yeah
quiet ice
it's pretty much your standard decimal but with other symbols
quaint mantle
does anyone know any particle that doesnt move
grim ice
we couldve added 1 or 2 or anything but then it would make it a second placement but also add a number
so we dont want that
so we add 0
drowsy helm
yeah exactly
quiet ice
I never really understood how people don't understand it, but then I also learned hex/bin really early in my life
grim ice
how old
quiet ice
8-ish I belive
drowsy helm
i only learnt this stuff last year
grim ice
i gotta learn oct and other stuff when i come back ig
drowsy helm
my uni teacher taught it super well
all the other base systems are the exact same concept
https://www.rapidtables.com/convert/number/hex-to-decimal.html?x=10 check out the conversion table at the middle of this page
quiet ice
to be honest, it makes more sense to just learn binary and then only learn the conversion between binary and hexadecimal/octal
drowsy helm
Converting non dec to non dec can get confusing sometimes
wet breach
223 base 10 to base 5 = 1343
first we figure out the powers
125 25 5 1
5^3 5^2 5^1 5^0
(1) (3) (4) (3)
223/125 = 1 R 98
98/25 = 3 R 23
23/5 = 4 R 3
1/3 = 3
Yes, but usually you'd only work with powers of two
wet breach
hope this illustrates better
drowsy helm
Yeah thats true
wet breach
Now there is something about converting, you will notice that when I converted to base 5
I have 4 digits
this is because by default bases are base number minus 1 because of the sign
if you don't care about the sign and want only positives, then you have to do a bit extra math for that to ensure nothing ever is negative 🙂
give me some more time to find some of my formulas
because I have it written on another trick for converting too
what I illustrated is the so called proper method
there is another method that isn't considered proper but it is generally faster XD
obtuse ferry
Does unsafeenchant "overwrite" old enchants
wet breach
it shouldn't, unsafe just lets you use a higher value for the level of the enchant then what is natively supported
obtuse ferry
For example if I have my custom enchant ABC level 1 and then i apply level 2 is level 2 now there or are there both and i need to remove the old one
wet breach
oh, it automatically changes the level
obtuse ferry
👍
drowsy helm
Dont think it’s possible to have multiple of the same enchant on an item anyway
wet breach
and that ^
obtuse ferry
kk, its just visual then because of how I add my lore
Should I be using
item.getItemMeta().hasEnchant()
or
item.containsEnchantment()
quiet ice
I'd use latter unless it is deprecated
quiet ice
As #getItemMeta clones itemmeta
alpine barn
how do I trigger a sound?
quiet ice
public boolean containsEnchantment(@NotNull Enchantment ench) {
return meta == null ? false : meta.hasEnchant(ench);
}
Oh, and it is good if the item is air
ivory sleet
LoD
A good principle, but if one follows it, one must be aware of the cons such as that you will have to write (a lot of) adapters, proxys and other ways to delegate and propagate.
quiet ice
(that being said, that is the paper impl, I'd not be suprised if cb uses return getItemMeta() == null ? false : getItemMeta().hasEnchant(ench) which would be even worse)
mortal hare
so i finally managed to setup my project through gradle (it was pain in the ass, especially from the maven user's perspective.) and i've hit another bummer. io.netty classes missing in 1.18
do i need to include it inside as seperate dependency?
quiet ice
?stash
undone axleBOT
smoky oak
is there an equivalent for PlayerAttackEvent or do i have to use EntityDamageByEntityEvent?
hardy swan
latter
mortal hare
so i finally managed to setup my project through gradle (it was pain in the ass,...
anyone?
quiet ice
https://hub.spigotmc.org/stash/projects/SPIGOT/repos/bukkit/browse/src/main/java/org/bukkit/inventory/ItemStack.java#333 okay, the cb ppl aren't that dum
You probably need to include them manually
hardy swan
<https://hub.spigotmc.org/stash/projects/SPIGOT/repos/bukkit/browse/src/main/jav...
no the cb people are actually dumb sometimes
take a look at their CraftBlockData
quiet ice
which is why I used not that
mortal hare
i have spigot jar inside my maven repo installed
and spigot-api too
how tf does server uses netty if the maven repo jar file doesnt include one
spiral light
is there an equivalent for PlayerAttackEvent or do i have to use EntityDamageByE...
PlayerAttackEvent would be redundant useless ... you need EntityDBEEvent
hardy swan
Say player A fire an arrow at C, then player B hits C, then the arrow hits C.
How do we get A from EntityDBEEvent?
quaint mantle
how tf does server uses netty if the maven repo jar file doesnt include one
the minecraft jar include netty
mortal hare
i dont get it
how can i include netty
it was so simple back in the days
now everything's so fragmented
since 1.18
spiral light
How do we get A from EntityDBEEvent?
check if damage instanceof Projectile
get ProjectileSource (check if not null)
check if ProjectileSource instanceof Player
hardy swan
check if damage instanceof Projectile
get ProjectileSource (check if not null)
c...
oh damn i forgot there is projectilesource
well thanks
quaint mantle
check if damage instanceof Projectile
get ProjectileSource (check if not null)
c...
actually if you check instanceof i dont think you need to check not null?
spiral light
actually if you check instanceof i dont think you need to check not null?
hmmm well you can check B instanceof A where A is the projectile source
maybe ^^
but you cant "null instanceof Player"
projectilesource can be null
hardy swan
but you cant "null instanceof Player"
you can
it will just return false
it includes nullity check
spiral light
hmm ... yeah dont know if you can check null ^^
quaint mantle
using tryit editor because i still havent figured out how to use that same feature in intellij
vocal cloud
Create junit tests lul
hardy swan
easy game
hardy swan
Create junit tests lul
guilty of doing that
grim ice
now that i know hexademical, how does Unicode and binary and ASCII work
hardy swan
you wanna learn some C?
grim ice
im not learning C these are just topics I do not understand
trim creek
For a runTaskLater Bukkit izé a simple public JavaPlugin plugin; is not enough?!
smoky oak
is there a temporary (until restart) variation of the PDC? I need to store for some entities a timer
grim ice
For a runTaskLater Bukkit izé a simple `public JavaPlugin plugin;` is not enough...
it isnt
its not initialized
tardy delta
is there a temporary (until restart) variation of the PDC? I need to store for *...
some kind of meta?
grim ice
and dont use JavaPlugin use ur main class i think its better
so private final Main plugin then initialize it in ur constructor
trim creek
and dont use JavaPlugin use ur main class i think its better
You think using the main class is better, but the reality is something else.
tardy delta
no no no
smoky oak
isnt metadata persistent?
hardy swan
im not learning C these are just topics I do not understand
what do you mean by not knowing how they work?
grim ice
what do you mean by not knowing how they work?
I want to understand them more
trim creek
First of all: the main class just inits the whole plugin. Second of all: the plugin has more server types in it, so I cannot use the loader.
grim ice
First of all: the main class just inits the whole plugin. Second of all: the plu...
what
ur main class is a java plugin
trim creek
Yes
tardy delta
public Class MyPlugin extends JavaPlugin {
private static MyPlugin instance;
@Override void onEnable() { instance = this; }
public MyPlugin getInstance() { return instance; }
}```
Or dependency injection
```java
public class ClassThatNeedsPluginInstance {
private final MyPlugin plugin;
public ClassThatNeedsPluginInstance(MyPlugin plugin) { this.plugin = plugin; }
void doSomething() {
Bukkit.getScheduler().runTaskLater(plugin, () -> System.out.println("MOOOOOO"), 20);
}
}```But it won't have any respawn events in it
tardy delta
use MyPlugin.getInstance() to access it
grim ice
I don't think I understan what you're talking about
hardy swan
I want to understand them more
they are just conventions/ways of representing data, I guess what you want to know is how data types make use of these representations?
undone axleBOT
Guide to dependency injection: https://www.spigotmc.org/wiki/using-dependency-injection/
tardy delta
which is usually better
trim creek
I don't think I understan what you're talking about
I can set different server types inside the config. If it is KITPVP, then the server will be a KitPvP, or if it is a LOBBY, then the server will be a Main Lobby.
hardy swan
ok you know binaries? strings of bits? 01000101
grim ice
for example, Hexademical
0xAB
is A = 10
10*(16^1)
hardy swan
ahh
grim ice
B is 11
11*(16^0)
thats what i meant
and other information that you think is useful
hardy swan
ok so for binaries it is just base 2 decimals
grim ice
Yes it is a base 2 is what i heard
hardy swan
so 101 is 1x2^0 + 1x2^2
grim ice
I can set different server types inside the config. If it is KITPVP, then the se...
read them on startup
hardy swan
once you know what base is it shouldn't be hard to understand other bases too
grim ice
set to variables then access variables
grim ice
so 101 is 1x2^0 + 1x2^2
o
hardy swan
so 101 is 1x2^0 + 1x2^2
this is basic concept of binary
not getting into data representations and signs
hardy swan
yes
hardy swan
you can search up on 2-complement representation of integers
grim ice
wait i think that exists in my todolist 1s
hardy swan
that's a bit more complex
grim ice
u mean
"- learn about twos complement numbers - 0%"
yep it is
I have this in my todolist
- learn about bits and bytes - 15%
- learn about IEEE-754 numbers - 0%
- learn about twos complement numbers - 0%
so i guess ill learn it
hardy swan
I have this in my todolist
- learn about bits and bytes - 15%
- learn about IEE...
bytes are just 8 bits
grim ice
yeah ive figured that out
hardy swan
ok task one completed
grim ice
lol
i wanna get into details tho
the extreme details if possible
idk if i can but i want to
tardy delta
I can set different server types inside the config. If it is KITPVP, then the se...
i dont think the point of your plugin is to change the world to f.e. a lobby? but only to set the world where you spawn in?
wet breach
the extreme details if possible
When I move this is the kind of stuff I will be making videos for 😄
trim creek
i dont think the point of your plugin is to change the world to f.e. a lobby? bu...
wat
grim ice
When I move this is the kind of stuff I will be making videos for 😄
giv youtube channel
trim creek
There are no multiple worlds...
wet breach
the extreme details if possible
Reason I am waiting on my move is because I will have an office and I don't have a channel yet
wet breach
But there is things like this
I want to talk more in depth and teach people
where its hard to find the clarifications
grim ice
maybe u can make forums until u move
then u can just read ur forums in ur videos
and u will alr gain some fame in the meanwhile
wet breach
I gave up my Dedi a couple of months ago so don't have a place for a site
grim ice
use spigot kek
wet breach
will be getting it back though 🙂
grim ice
or do tha
wet breach
but, I love to teach though and math is one of my favorite things and people tell me I do so well in explaining it easily for people to understand
hardy swan
the extreme details if possible
so basically all data is represented in units of bytes, not bit. This explains why a boolean is a byte and not a bit, cause using bit for it has some overhead on computation. integers are most of the time 32 bits, long long (or java's long) is 64 bits, char and boolean is 8 bits etc.
wet breach
because I don't believe things need to be hard
grim ice
SolarRabbit seems to be writing a ton, ty rabbit :)
wet breach
and most of the time it isn't hard just needs to be better explained to be better understood 😄
trim creek
Guide to dependency injection: <https://www.spigotmc.org/wiki/using-dependency-i...
Using this shit just makes the plugin event do nothing.
grim ice
so basically all data is represented in units of bytes, not bit. This explains w...
oh thats what i know
grim ice
Using this shit just makes the plugin event do nothing.
its not shit
u just dont know how to use it
show me ur code
hardy swan
then I think you are kind of set to go, next learn bit operations
grim ice
then I think you are kind of set to go, next learn bit operations
okay
what are bit operations now
i should google it
but live chat is much more fun
hardy swan
it is a manual way of manipulating bits
with vast applications
and computational advantages
grim ice
can u give me an example
trim creek
its not shit
Oh sooo good.... -.-
I need a fucking respawn system because of a fucking bug that makes me always teleport to the fucking top of the fucking buildment, but I cannot, because the fucking plugin doesn't do anything without waiting a fucking tick (it doesn't teleports the player), and now even code share?!
quaint mantle
?learnjava
undone axleBOT
Here are some links to get you started on learning Java:
- https://www.codecademy.com/learn/learn-java
- https://www.sololearn.com/learning/1068
- https://www.learnjavaonline.org/
- https://programmingbydoing.com/
- https://docs.oracle.com/javase/tutorial/java/index.html
The last one is the only official one, however some of those concepts assume that you already know a bit about programming.
grim ice
Oh sooo good.... -.-
I need a fucking respawn system because of a fucking bug th...
sir
if u dont want help u can take ur leave
quaint mantle
you're the one who want to get help, not us
grim ice
^
quaint mantle
dont be so hostile
grim ice
like i am rn, i cannot just scream at solar
hardy swan
can u give me an example
For example, there is this operation called left shift (<<). It basically shift all bits of the data structure to the left. 0001 -> 0010. As you might realise this is equivalent to multiplying the number by powers of two, which is faster if you do bit shifts for large powers
grim ice
cuz first thats not nice and second hes helping me
wet breach
what are bit operations now
technical term to learn this is called bitwise operators
hardy swan
oh yes, bitwise operations, my bad
grim ice
For example, there is this operation called left shift (`<<`). It basically shif...
oh sso 0100 will be 1000
how can this help me in code tho
hardy swan
it depends, you can look at java random for one such application
quaint mantle
like i am rn, i cannot just scream at solar
yeah, but dont try to scream at them after you done it lol
grim ice
yeah, but dont try to scream at them after you done it lol
yeah
why would u even scream at anyone here
anyways
grim ice
it depends, you can look at java random for one such application
is that how they generate stuff
do they make a random of 0 or 1
trim creek
if u dont want help u can take ur leave
And how could you help, if even the world is a bugged shit?
grim ice
and make an array of 0s and 1s
trim creek
Read #help-server
grim ice
then they turn it into numbers or something
trim creek
You will know why I need all this crap
Even executing a fucking spawn command doesn't do aynthing
vocal cloud
Being upset isn't going to help so maybe calm down first
trim creek
IT ALL IS USELESS AS FUCK
quaint mantle
thats the server problem then
grim ice
IT ALL IS USELESS AS FUCK
sorry but you're useless ok that was mean sorry
trim creek
thats the server problem then
Sure?
quaint mantle
cold tiger
How do i share large code
quaint mantle
How do i share large code
?paste
undone axleBOT
hardy swan
is that how they generate stuff
no, it is a long story but it is how nextInt() works for extracting only the first 32 bits from 48 bits
wet breach
how can this help me in code tho
an easy example is if you wanted to do exponents of 10, you only need to shift the bit over instead of doing actual math. This skips the CPU doing any processing to figure out the result and instead you are saying this is actually the result
cold tiger
wet breach
in Minecraft, when you convert from chunk coords to block coords you can do bitshifting 🙂
grim ice
how to assign that to a variable and stuff
wet breach
bounding boxes can use bitshifting too
grim ice
bounding boxes can use bitshifting too
idk how's that done or whats that
cold tiger
https://paste.md-5.net/onepuzeviz.cs
player.getWorld().getEntities().stream().forEach(e -> {
System.out.println("Running");
if (e.getType().name().equalsIgnoreCase(args[0].toUpperCase())) {
System.out.println("World: " + player.getWorld().getName() + " Entity Name: " + e.getType().name() + " Location: " + e.getLocation().getX() + " " + e.getLocation().getY() + " " + e.getLocation().getZ());
player.sendMessage("World: " + player.getWorld().getName() + " Entity Name: " + e.getType().name() + " Location: " + e.getLocation().getX() + " " + e.getLocation().getY() + " " + e.getLocation().getZ());
}
else {
//me.fanisus.tutorial.Main.getPlugin(Main.class).getLogger().log()
System.out.println("Cannot find entity with given name");
player.sendMessage("Cannot find entity with given name");
}
});
}```
This throws me an error
ErrOr:```[18:38:20 INFO]: Fanisus issued server command: /tutorial:entity-location Boat
[18:38:20 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'tutorial:entity-location' in plugin Tutorial v1.0-SNAPSHOT
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_18_R1.CraftServer.dispatchCommand(CraftServer.java:897) ~[paper-1.18.1.jar:git-Paper-175]```for example chunks are 16x16
nvm bad example i was thinking of
wet breach
Int A = 100;
//this shifts the int's bits to the right by 1.
Int B = 100 >> 1;
o
so it will become 010
grim ice
for example chunks are 16x16
nvm bad example i was thinking of
its okay xd
wet breach
<< and >> are arithmetic shifts
>>> is a logical right shift
frostalf is using decimals
grim ice
is there a way not to use them
wet breach
unfortunate with bitshifting in java you have to use int or long
you can't use byte to do it
hardy swan
but you can represent them with suffix b
wet breach
^
hardy swan
i think
wet breach
I will show you an example project where I use bitshifting
hardy swan
Int A = 100b;
Int B = 100b >> 1b;
100b >> 1 will do
grim ice
so ur not shifting it by a bit, ur shifting it by a number?
hardy swan
you are shifting by one position
grim ice
ive heard B is byte and b is bit is that true
grim ice
you are shifting by one position
Alright
hardy swan
ive heard B is byte and b is bit is that true
yes, in most context
wet breach
hardy swan
oh yea, colors are good examples
wet breach
I created that project because someone wanted me to compress colors into 8bit
smoky oak
how do you check if MetadataValue.getOwningPlugin() returned your plugin? Doesn't the main class extend JavaPlugin?
tardy delta
how do you check if `MetadataValue.getOwningPlugin()` returned your plugin? Does...
that plugin will extends javaplugin iirc, use instanceof?
wet breach
But bitshifting makes a lot of the math super efficient 🙂
since technically there is none XD
grim ice
public static String getHexValue(int num) throws IllegalArgumentException {
ColorChecker.checkColorCode(num);
int red = (num & 0x0ff) << 16;
int green = (num & 0x0ff) << 8;
int blue = (num & 0x0ff);
int red2 = (red / 8) * 256;
int green2 = (green / 8) * 256;
int blue2 = (blue / 8) * 256;
int hexvalue = (red2 >> 5) | (green2 >> 2) | blue2;
return Integer.toHexString(hexvalue);
}
sorry for flooding but
will
red return what
if num is uh
idk
what is num supposed to be
smoky oak
that plugin will extends javaplugin iirc, use instanceof?
do you mean if(n.getOwningPlugin() instanceof MainPluginClass)?
tardy delta
i think that will work
hardy swan
what is num supposed to be
that is a bit masking, where you mask certain bits in your favor
grim ice
whats masking
hardy swan
you have ffffff as color white
grim ice
yes
hardy swan
r value of ff, b value of ff, and g value of ff
wet breach
so because RGB is technically base 3 and hex is base 6, I have to use offsets to fill the gaps 🙂
grim ice
its in decimals now
wet breach
yes
grim ice
wat
wet breach
wet breach
it will append
grim ice
okay
cold tiger
if ((args.length > 0) && (args[1].equalsIgnoreCase("chunk"))) {}
This line throws an the error how do i fix
hardy swan
Error: https://paste.md-5.net/iholumapup.bash
you got the error message you need, array out of bound 1 for length 1
hardy swan
you are trying to access position 1 of array with only 1 slot
vocal cloud
You need to learn java.
hardy swan
positions are however 0-based
cold tiger
you are trying to access position 1 of array with only 1 slot
Ok, Then i can't do args[1] if it is not present?
vocal cloud
No because arrays start at 0
hardy swan
yes this is not c
grim ice
uh
vocal cloud
hardy swan
-.-
vocal cloud
Then you need to > 2
cold tiger
so had no problems with it
vocal cloud
You really need to learn java. Sigh
wet breach
so, using the & 0x0FF is essentially bitmasking. This will make the integer in binary representation have 0's all to the left except the lowest 8bits
@grim ice
cold tiger
You really need to learn java. Sigh
I spent 12 hours on it
vague nexus
hey, how can i get player skulls wothout loading time?
mortal hare
does anyone have problems with 1.18 dependencies
cold tiger
minimum
mortal hare
i can't find netty classes anymore
cold tiger
Ate this whole guide https://www.programiz.com/java-programming
vocal cloud
I spent 12 hours on it
Which goes to show you need to learn java because this issue is such a basic issue that's 100% avoidable
wet breach
this is necessary for the bitshifting because remember, I am going from hex to rgb, one is greater then the other, thus I need the padding on the left to be appropriate so I can do the bitshifting
grim ice
how do you access it as an integer
mortal hare
does anyone have problems with 1.18 dependencies
anyone??
wet breach
is not an integer
no but it has an integer in there 🙂
that is why I have the escapesecquence method
the reason I didn't automatically do that in the other methods is because then you couldn't use this color conversion code in other projects 😛
grim ice
o
wet breach
you would constantly have to keep filtering the result XD
vague nexus
hey, how can i get player skulls wothout loading time?
can anyone help?
wet breach
The project doesn't use any API's 😛
its universal
can be used in anything if you want 🙂
wet breach
its not a plugin, its designed to be depended on and shaded in or built as jar that resides in a directory with your main jar
grim ice
its in awt so
e
anyways
int hex = 0x123456;
int r = (hex & 0xFF0000) >> 16;
int g = (hex & 0xFF00) >> 8;
int b = (hex & 0xFF);
i found this in google
this is essentially what ur doing
right
wet breach
essentially yes
wet breach
think about it in exponents
remember how we demonstrated how to convert bases? and showed exponent representations?
well bitshifting is an exponent operation
grim ice
remember how we demonstrated how to convert bases? and showed exponent represent...
did we do that tho
wet breach
yes like a while back XD
well I did anyways
but remember bases in code still is binary though
maiden briar
Anyone can help me with MySQL?
I am working with a points system. If a players wins a game he will get a point, losing will remove a point, etc. I also want to check what place the player is (For example, player Tvhee has 10 points, player Fool has 5 points. If I want to get the first placed player I want to get Tvhee)
How can I sort the table?
wet breach
so because I am down converting to base 3 or from 16bits to 8bits, I have to pad with 0's to the left
grim ice
how do u even convert binary to hex and vice versa
mortal hare
i can't find netty classes anymore
anyone????
grim ice
int hex = 0x123456;
int r = (hex & 0xFF0000) >> 16;
int g = (hex & 0xFF0...
thats why i dont understand this
idk how to convert binary to hex and vice versa
hardy swan
you don't convert
it is just a matter of representation
moreover, bitwise operators operate on bits
so you should do the conversion yourself
grim ice
how do i know what is the result of
0xFF0000 >> 16
mortal hare
that should be 0x0 iirc (edit wrong)
visual tide
what does Permission#getPrimaryGroup in vault get? the group with the highest priority or what
hardy swan
bit right shift by 4*4 is equivalent to right shifting hex 4 times
grim ice
whats bit right shift by 4*4
hardy swan
1 hexadecimal digit is 4 bits
grim ice
oh ok that makes sense
hardy swan
hence 0xabcdef >> 16 = 0xab (shift by 4 positions in hexadecimal sense)
hardy swan
depends on the data structure
grim ice
wha
wet breach
thats why i dont understand this
alright, so in RGB, each color code, has a range from 0 to 255, which is an unsigned byte. however RGB in code isn't represented with 3 bytes, instead it is represented with an integer number instead. So how do we know where RGB is at? Well in 8bit colors, Red has 3bits, Green has 3bits and then Blue has the remainding 2bits
mortal hare
anyone from here code plugins for 1.18?
wet breach
so if we want to know the bits for red, we can shift 5bits out of the way
to get the left 3 bits
and doing this, I didn't need to know any math what the red color is
because I need to know the values of the colors themselves before I can do any converting
hence the additional math that does get done but on each bit color 🙂
and then at the end if we are converting to hex, we need to shift the bits to pad because hex is larger then 8bits
if we didn't shift the bits with logical right shift, all the bits on the left would be F's
instead of 0's
FFFFFFF8 is not the same as 00000008
and remember these values are being held in an int
grim ice
o
wet breach
so, while although I am working with 8 and 16bits, there is more bits being represented then what is being messed with XD
opal juniper
anyone from here code plugins for 1.18?
yes
wet breach
anyone from here code plugins for 1.18?
I mean lets not mind the talks about coding going on and assume we are not developers 😛
mortal hare
i can't seem to find netty packages anymore
wet breach
?bootstrap
undone axleBOT
Bootstrap Jar
The main spigot-1.18.jar is now a bootstrap jar which contains all libraries. You cannot directly depend on this jar. You should depend on Spigot/Spigot-API/target/spigot-api-1.18-R0.1-SNAPSHOT-shaded.jar, or the entire contents of the bundler directory from your server, or use a dependency manager such as Maven or Gradle to handle this automatically.
Please read the release notes for further information: https://www.spigotmc.org/threads/9-years-of-spigotmc-spigot-bungeecord-1-18-1-18-1-release.534760/#post-4305163
opal juniper
i can't seem to find netty packages anymore
are you depending on spigot or spigot-api
mortal hare
the thing is, i'm using paper
visual lichen
Hi, how I can import classes from manager package? I have GameManager class here and it's critical for the minigame plugin I work on. But when I try to refer to such class by code:
getServer().getPluginManager().registerEvents(new GameManager(this), this);
- it's throwing an error
'registerEvents(org.bukkit.event.Listener, org.bukkit.plugin.Plugin)' in 'org.bukkit.plugin.PluginManager' cannot be applied to '(xyz.slavistapl.plugins.instagib.manager.GameManager, xyz.slavistapl.plugins.instagib.Instagib)'. How I can refer to theGameManagerclass frommanagerpackage otherwise?
Any help would be appreciated.
wet breach
Hi, how I can import classes from `manager` package? I have `GameManager` class ...
?DI
?dependencyinjection
?di
undone axleBOT
Guide to dependency injection: https://www.spigotmc.org/wiki/using-dependency-injection/
wet breach
there we go
opal juniper
the thing is, i'm using paper
so
paper-api or paper
wait actually you are using the userdev i assume
wet breach
well their build system is different too
grim ice
hm
wet breach
but I mean, this is the wrong discord to come to, and asking how to properly depend XD
opal juniper
yeah ok so go to paper
brave goblet
Is anyone willing to help me make a custom world gen plugin? from a datapack.
grim ice
@wet breach @hardy swan
you two
are better
than all the teachers ive met in my 15 years of life
wet breach
lol
spiral light
Is anyone willing to help me make a custom world gen plugin? from a datapack.
an plugin that can generate custom worlds like datapacks can but api not ?
brave goblet
Well only because the datapacks make use of functions
brave goblet
https://www.spigotmc.org/resources/advancedworldcreatorapi.89100/
this is not what i am looking for
spiral light
this is not what i am looking for
hmmm then i dont understand what you want to do else ...
brave goblet
hmmm then i dont understand what you want to do else ...
I have a datapack that I would like to reproduce as a plugin
wet breach
whats |=
// | is bitwise or |= is the same as += or works in the same way, just used in bitwise operation instead.
public static final int DEFAULT_SOUND = 1;
public static final int DEFAULT_VIBRATE = 2; // is the same than 1<<1 or 10 in binary
public static final int DEFAULT_LIGHTS = 4; // is the same than 1<<2 or 100 in binary
int myFlags = DEFAULT_SOUND | DEFAULT_VIBRATE; // same as 001 | 010, producing 011
spiral light
I have a datapack that I would like to reproduce as a plugin
yes .... but the API i linked can exactly do that ....
brave goblet
yes .... but the API i linked can exactly do that ....
oh oki
spiral light
or do you want to let the plugin read your datapack ?
brave goblet
I would just like to have custom world generation without lag ;-;
grim ice
```java
// | is bitwise or |= is the same as += or works in the same way, ju...
shouldnt that be 100 | 10
spiral light
https://www.spigotmc.org/resources/advancedworldcreatorapi.89100/
this can generate an custom world like an datapack can ... mostly ...
grim ice
how is it 001 | 010
brave goblet
if there isn't you can usually find a dev anywhere thats willing to make a plugin to replace it. datapacks are generally fairly simple by nature, so recreating as a plugin is usually a 5 minute job for most plugin devs
This is what some one said if i can't find a world gen plugin similar to the datapack
spiral light
I would just like to have custom world generation without lag ;-;
lag ? if the datapack creates lag its not optimized
wet breach
remember I said |= is the same as += but you can't use += in bitwise operations
so you have |=
brave goblet
lag ? if the datapack creates lag its not optimized
the only thing that i have heard issue about are datapacks using functions
wet breach
010 + 001 = 011
grim ice
OH MY BAD I THOUGHT U MEANT DEFAULT VIBRATE
brave goblet
if it's pure world gen it should be less laggy
spiral light
> if there isn't you can usually find a dev anywhere thats willing to make a plu...
its not 5min of work since datapacks "not just simple" interact with the server ... recreating worldgen datapack stuff was a hard work of weeks and days to figure out
quaint mantle
if it's pure world gen it should be less laggy
wait, so you want someone to do that for you?
grim ice
010 + 001 = 011
so it adds them as binary
quaint mantle
or you want to learn to do that yourself
brave goblet
its not 5min of work since datapacks "not just simple" interact with the server ...
oki well that came from a developer of purpur
brave goblet
wait, so you want someone to do that for you?
well both?
quaint mantle
if you want someone to do that for you then
quaint mantle
?services
undone axleBOT
If you wish to request or offer development/art/building/administration services, please do so at https://www.spigotmc.org/forums/services-recruitment-v2.54/
grim ice
ayyy that feels so good understaanding it
quaint mantle
well both?
?learnjava first if you want to do it yourself
undone axleBOT
Here are some links to get you started on learning Java:
- https://www.codecademy.com/learn/learn-java
- https://www.sololearn.com/learning/1068
- https://www.learnjavaonline.org/
- https://programmingbydoing.com/
- https://docs.oracle.com/javase/tutorial/java/index.html
The last one is the only official one, however some of those concepts assume that you already know a bit about programming.
grim ice
i remember having a mental breakdown over it (exaggeration)
wet breach
lol
brave goblet
?learnjava first if you want to do it yourself
ik how to do java,,,
wet breach
well now everything becomes clearer for you hopefully 😄
wet breach
yeah once you get the hang of bitshifting you probably will never go back to just regular math 😛
because its so much more optimal in some cases
and faster
grim ice
:o
quaint mantle
its not 5min of work since datapacks "not just simple" interact with the server ...
yeah, i feel like the support for datapacks are from nms, which means you have to use nms now
hardy swan
yeah once you get the hang of bitshifting you probably will never go back to jus...
totally relate
must write cool code that normies cant understand
quiet ice
remember I said |= is the same as += but you can't use += in bitwise operations
That may be worded a bit confusingly
hardy swan
no you just ascended
spiral light
yeah, i feel like the support for datapacks are from nms, which means you have t...
and sadly the bukkit api for WorldCreation will not expand in the future to support more configuration details of worlds .... thats why i needed to create the API which is not nice
grim ice
ayyy
quiet ice
101 | 110 is 111, not 1011
wet breach
ayyy
so while we are on topic of bitwise stuff, that recent example I showed?
well those are technically bit flags
those are all 3 bits and if we added them all together we know all 3 flags are being set
111
grim ice
yes
wet breach
so this is where bitshifting and bitwise operators start to come in handy because once you start learning to make these bit masking stuff
it is so much easy then just using booleans everywhere 😛
brave goblet
yeah, i feel like the support for datapacks are from nms, which means you have t...
:')
quiet ice
this is because it is not an addition
quiet ice
Good
hardy swan
what do you not understand exactly
quiet ice
The AND or XOR?
grim ice
ye
wet breach
https://stackoverflow.com/questions/10493411/what-is-bit-masking
a bitmask defines which bits you care about
or the bits you really want
grim ice
so & only removes
hardy swan
i dun think you should think that way
quiet ice
Well,
0 & 0 = 0
0 & 1 = 0
1 & 0 = 0
1 & 1 = 1
quiet ice
Repeat that with every digit, and you have the result
grim ice
Well,
0 & 0 = 0
0 & 1 = 0
1 & 0 = 0
1 & 1 = 1
yes so 0 only applies to 1 and removes it but 1 cant add
wet breach
basically your mask is equal in size to the amount of bits you want, the mask is either 0 or 1. 0 means we don't care about it, 1 means we do and get us the value
grim ice
there is only removing and the only one capable of removing 1s is 0
quiet ice
It's booleanic algebra iirc. (which is why booleans are named booleans)
grim ice
think of &&, where `true` is 1 and `false` is 0
OHHH
right cuz false and false is false but false and true is false and true and true is true false and true is false
grim ice
basically your mask is equal in size to the amount of bits you want, the mask is...
yea
i see
what is XORing tho
hardy swan
think of &&, where `true` is 1 and `false` is 0
similarly, || can be an analogy for | in the same way
quiet ice
And for xor
0 ^ 0 = 0
0 ^ 1 = 1
1 ^ 0 = 1
1 ^ 1 = 0
wet breach
geol is on top of it 🙂
quiet ice
Basically like OR, but results 0 for a bit if both input bits are set
quiet ice
Or better said, returns 0 if both input bits are the same, 1 otherwise
hardy swan
exclusive or
quiet ice
So technically a reverse AND
wet breach
yeah that is better put
hardy swan
So technically a reverse AND
not really, not true for reverse of 0&0
grim ice
And for xor
0 ^ 0 = 0
0 ^ 1 = 1
1 ^ 0 = 1
1 ^ 1 = 0
basically reverse anding but 1 on 1 is 0
spiral light
Basically like OR, but results 0 for a bit if both input bits are set
isnt this then XOR ?
oh wait you wrote that
quiet ice
not really, not true for reverse of 0&0
ah yeah, forgot that
Reverse equals then
but bitwise
grim ice
in xor a 1 is stronger than 0
so 0 cannot remove something stronger
but a 1 and a 1 are equal strength so they kill each other
thats how to explain it to a 4 yrs old
lol
ill understand it that way ig
hardy swan
i recommend to understand it as it is named, exclusive or, this or that but not both cuz im being exclusive
hardy swan
nothing is stronger than anything
grim ice
ik
its like an analogy or smth
idk
its like saying 0 is a black hole so anything u multiply with it dies
wet breach
its like saying 0 is a black hole so anything u multiply with it dies
guess this is one way to put it sometimes
quiet ice
Unicode is basically a giant map
value -> some symbol
grim ice
oh
quiet ice
The bigger question is how UTF-8 works
quiet ice
Not always :)
quiet ice
UTF-16 can also be bigger than 16 bits
quiet ice
yeah, minimum size per codepoint
hardy swan
nothing is represented under 8 bits
smoky oak
isn't a char 4 bits
quiet ice
16 bits
grim ice
utf 16 is useful for arabic characters too right
hardy swan
or am I C++ing
quiet ice
correct
grim ice
cuz one arabic character can have 2
hardy swan
oh fk
smoky oak
on a different topic
grim ice
for example ba in arabic is one letter, and you add a line above it
smoky oak
can i store persistent data in a block somehow without utilizing the chunk it's in?
quiet ice
if it is a tile entitiy, yes I think, otherwise no
quiet ice
but less wastefull than UTF-8 for more obscure texts
grim ice
4 terabyte would be 1 terabyte in utf 8
smoky oak
what's the best way to run a check on every block when it unloads? I need to place a temporary block that gets removed when the server shuts down
grim ice
4 terabyte would be 1 terabyte in utf 8
or am i bsing
wet breach
imagine utf 32
there is advantages to using UTF-32 like data transmission for instance. The reason is because UTF-32 is fixed encoding, meaning you can assume 32bits all the time. However when you start using UTF-16 or UTF-8 they are both variable encoding meaning their sizes are not fixed.
grim ice
oh right
smoky oak
ah.
Just flag the chunk if there's that kind of block in it and dont run the check unless that flag's there
grim ice
btw
u can use utf 16 characters with utf 8 encoding
right
itll just take 2 bytes instead of 1
smoky oak
oh are you shitting me
quiet ice
UTF-8 encodes larger codepoints like
0b1111DDDD
0b111DDDDD
0b11DDDDDD
0b1DDDDDDD
where as D are data bits
(So UTF-8 has some waste)
smoky oak
block doesnt have PDC and chucnk doesnt have metadata
quiet ice
chunk has PDC nowadays though
grim ice
what are data bits
tardy delta
chunk and block with tilestate have pdc
quiet ice
well bits used to encode the codepoint
smoky oak
not metadata
wet breach
itll just take 2 bytes instead of 1
in unidcode the first 128 characters use 1 byte, the next 1,400 some odd characters use 2 bytes, the next set of characters after that take 4bytes
smoky oak
i need a temporary flag in a chunk
tardy delta
why not just in memory objects instead of metadata?
grim ice
o
grim ice
so if u loop through all unicode characters
wet breach
in UTF-32 you could represent a 4byte character easily, but in UTF-8 you would need 2 codepoints for it
grim ice
and check if they take more than 1 byte
and only take the ones that are 1 byte
i wanna try that
is it possible
zinc spire
I want to have my old building in 1.15 back to 1.8 does anyone know how to do that?
wet breach
well there is a limit to each UTF size
quiet ice
then you would obtain the ascii table
tardy delta
what would be the point of storing something in metadata instead of like a collection of things in the plugin?
wet breach
in how many characters can be represented
tardy delta
metadata isnt persistent iirc
smoky oak
thats the intention
i want a temporary block
and to prevent having to loop through every block in every chunk when its unloaded
i want to flag the chunks with those blocks in it
quiet ice
Then why not use an external HashMap?
smoky oak
because i dont know when the chunk gets unloaded
quiet ice
Map<Long, List<Integer>>
Where as Long is the X/Z coords of the chunk and Integer the X/Y/Z coords of the block in the chunk
smoky oak
do you know the O(n) for HashMap.hasKey by chance?
quiet ice
O(k/n)
grim ice
WAIITTT
quiet ice
k is capacity, n is the number of keys
wet breach
oh no, they just had a moment of clarity
smoky oak
uh
tardy delta
is that binary?
grim ice
the weird stuff in boxes are ASCII Chars under 32
smoky oak
a hash map has a really big capacity
quiet ice
Then go with a small load factor to keep it relatively near the actual size
smoky oak
wait
quiet ice
Just means you have a lot of lag spikes when the hashes need to be recomputed
tardy delta
what is the load factor of a hashmap?
wet breach
the weird stuff in boxes are ASCII Chars under 32
this is just the text editor trying to convert the binary data into text when the data isn't text but numbers that represent color related things 😛
grim ice
is that binary?
thats binary from an image opened as a text
grim ice
this is just the text editor trying to convert the binary data into text when th...
yeah i realized hat
smoky oak
wdym recomputing?
quiet ice
what is the load factor of a hashmap?
The amount that the hashmap grows when it hits the capacity
tardy delta
ah what would you expect
smoky oak
when the map gets changed?
grim ice
this is just the text editor trying to convert the binary data into text when th...
is there a way i can do the opposite
the text that i found
quiet ice
the hashes need to be recomputed when the capacity is increased
smoky oak
ah then its not an issue
grim ice
then use binary to make the image
wet breach
yeah i realized hat
what characters are displayed is dependent on the encoding of the text editor uses when opening said file. Most of the time this is ASCII however some editors default to UTF-8
quiet ice
therefore if you know the expectable capacity beforehand the hashmap performs the best
smoky oak
considering it's got a maximum number of entries at around 250 if you're really trying hard to push it
also how do i tell a hash map to have 'this much' capacity?
smoky oak
Geol?
quiet ice
you cannot really
smoky oak
you just said it performs best if you know the capacity beforehand
if you cant tell the hashmap that
then why would that help?
grim ice
im gonna use a website
to make it into binary
then ill make the binary into an image
will that work
tardy delta
🥉
wet breach
also how do i tell a hash map to have 'this much' capacity?
HashMap<String, String>(size);
Because the hashmap would not need to rehash as often
wet breach
even if you don't know the exact size
quiet ice
Oh I misunderstood
wet breach
if you know approximately how large it will need to be initially it is better to set the size first
quiet ice
I thought you meant how to get capacity of the hashmap at a certain point
tardy delta
.size()?
smoky oak
huh. can i tell a hashmap what size to rehash to if it exceeds capacity?
quiet ice
That returns the amount of actually used elements
Not the actual capacity. The same applies to arraylists
tardy delta
ah not the actual size