room232

Shiro

1:25 AM

hey

The User

hi again. I was implementing the collision and had trouble using the last Vector

Shiro

the B ?

The User

The vel. I call it C

public void update()
{
A.setPos(x, y);

if(Keyboard.isKeyDown(Keyboard.KEY_D))
x+=2;
if(Keyboard.isKeyDown(Keyboard.KEY_A))
x-=2;
if(Keyboard.isKeyDown(Keyboard.KEY_W))
y-=2;
if(Keyboard.isKeyDown(Keyboard.KEY_S))
y+=2;

B.setPos(x, y);

C.setPos(B.getX() - A.getX(), B.getY() - A.getY());
if(IntersectsX(P, E))
if(C.getX() > 0){x = E.getX() - width; System.out.println("col");}

}

public boolean IntersectsX(Rectangle A, Rectangle B)
{
return (B.getX() < A.getX() + A.getWidth()) &&
(A.getX() < (B.getX() + B.getWidth()));

I was checking the x position only because y in opengl is a little odd

it starts from the top and I wwanted to make sure i was using it right

Shiro

this seems right to me

with a couple of small things wrong

The User

when im pressing the right key i get thrown to the left of the platform

Shiro

1:31 AM

the right key is supposed to move the player to the right correct ?

E is supposed to be the wall ?

The User

yes, should I actually show more code? It's about 100 lines

no E isnt

Shiro

ok whats E

The User

public class AABBDemo {

ShapeRenderer batch = new ShapeRenderer();

int x = 100;
int y = 100;
int width = 50, height = 50;

Vec2 A = new Vec2(x, y);//pos of player before movements...
Vec2 B = new Vec2(x, y);//pos of player after movements
Vec2 C = new Vec2(x, y);//B - A

Rectangle P = new Rectangle(100, 100, 50, 50);//player
Rectangle E = new Rectangle(100, 300, 90, 20);//enemy

public AABBDemo() {
try {
Display.setDisplayMode(new DisplayMode(640, 480));
Display.setTitle("Testy cles");
Display.create();

Shiro

is the format of this text how you normally write ?

or this chat changes it ?

The User

i just pasted it

I think it's normal text

Shiro

1:34 AM

you should use "tab" more

and format the code better

its so hard to understand what you are writting

but

what is E ?

The User

P is the player rectangle and E is the enemy or wall

Shiro

and what is the problem and what you wanted the result to be

The User

when you press the right key, when your x < the enemy/wall's X you get pushed to the enemy/wall's x

I want to only get pushed to that x when I'm close enough

Shiro

when you press the right key

you player increases its x by 2 pixels

if the player and the enemy/wall intersect

then you set players x to walls.X - player.width

and thats what we do with this code, as far i as can tell without running the code myself

let me just re-format this code a little bit

cause the way you have it write now, is impossible to read :p

and has all kinds of mistakes

The User

Oh that's because I pasted it into chat heh

Shiro

1:43 AM

you should have

a class

entity

The User

hastebin.com/izeqofegoz.avrasm

why?

Shiro

with properties, position(vector2) and bounds(rectangle)

and then have something like

Entity player = new Entity(...);
Entity enemy = new Entity(...);

cause thats how you program in java, an object oriented language

you just have a bunch of variables thrown in a class

named X Y A B C D E

none understands what you are doing

The User

oh, I wanted to keep this in one class so it could be more readable for anyone who can help me. But I guess that's a bad idea

Shiro

its a very bad idea, not to be hard, but yea

im gonna go to bed in a bit but

i ll try and change this code a little bit

without trying it

so it might have errors, but i ll show you how to write this a bit better at least

The User

okay. Here's the code without some of the random variables i left hastebin.com/ayemalujad.avrasm . heh, sorry about that

Shiro

1:47 AM

can i see the vector 2 class ?

The User

hastebin.com/kupexaxune.pl

Shiro

you wrote this ?

The User

yeah

Shiro

do you have the rectangle code ?

The User

this? Rectangle P = new Rectangle(100, 100, 50, 50);//player rectangle
Rectangle E = new Rectangle(100, 300, 90, 20);//enemy or the actual class?

Shiro

1:50 AM

the rectangle class

The User

github.com/LWJGL/lwjgl/blob/master/src/java/org/lwjgl/util/…

Shiro

why do you have

a rectangle and a vec2 for the player

when the rectangle.x and rectangle.y is basically the vec2.x and vec2.y ?

The User

The rectangle so I can render it and the Vec2 so It could look more readable in the update loop

Shiro

man java sucks

:D

still fixing the code a little bit

the format

The User

haha, I'm actually looking into learning c++ or something. Getting bored of Java

Shiro

2:04 AM

this whole get and set thing

is so much easier in C#

you need to stick with 1 bracket format

either void() {
}

or void()
{
}

The User

whoops

Shiro

anyway just check the format in the code i ll send you soon

you have major mistakes :p

format-wise

The User

that explains why i dont usually get answers for my code

Shiro

hastebin.com/hogesiforu.axapta

i saw 1 mistake

The User

That is a lot neater :o . what was the mistake though?

Shiro

2:15 AM

hastebin.com/puzafemiya.axapta

i have no idea

this seems fine to me

i wrote this in notepad

does it compile ?

check the second link i sent

The User

i get a syntaz error: The operator - is undefined for the argument type(s) Vec2

on the line with Vec2 PlayerVelocity = new Vec2(Player.getX(), Player.getY()) - PreviousPlayerPosition;

ah, my vector class isnt handling that

Shiro

you cant substract vectors ? holy java :D

aight then just do it the other way

The User

I made my own vector class, I don't know about theirs

Shiro

Vec2 PlayerVelocity = new Vec2(Player.getX() - PreviousPlayerPosition.getX(), Player.getY() - PreviousPlayerPosition.getY());

now i remember why i am using C#

The User

It sounds cleaner

Shiro

2:19 AM

public int X { get; set; }

this is how you define get set in C#

1 line

and this is how you use it

Y = X;

(thats the get)

X = Y;

(and thats the set)

you arent calling any function, you just write X

just like X was public

The User

woah. So when you do that you have x with a null value until you set; it?

Shiro

thats should be a property of a class

for example

The User

also the code compiles and works :D

Shiro

class Rectangle
{
public int X { get; set; }
public int Y { get; set; }
public int Width { get; set; }
public int Height { get; set; }
}

done, rectangle class in C#

The User

really? That's amazing small

Shiro

2:22 AM

well, needs a constructor

and functionalities, but you get the idea

The User

what if you want to get the x + 5?

Shiro

Rectangle asd = new Rectangle(1,1,1,1);
int asd111 = asd.X+ 5;

my code works as you wanted it to ?

The User

The syntax is beautiful. But yeah, it works perfectly fine. I just haven't done the other sides yet

Shiro

one thing

if(Keyboard.isKeyDown(Keyboard.KEY_D)) Player.setX(Player.getX() + 2);

this logic

will make your object move slower

if you have an fps spike

so if you run this on a ancient pc

and you press D

the movement will be slow fast fast slow fast fast etc

this is not how you move objects i ngame

you need to calculate the delta time between each update call

The User

Delta was a pain

Shiro

2:28 AM

0

A: Help on transition from one position to another

position += velocity * DeltaTime * speed; This is a better way of calculating the position. this way your movement wont slow down on framerate drops, because you take into account the time elapsed between the last Update call, if it was longer than usual (low fps) you move more distance. The c...

check both answers in this question

the other answer is probably better than mine

this is how you move objects in games

always

basically you should have

if(Keyboard.isKeyDown(Keyboard.KEY_D)) Player.setX(Player.getX() + DeltaTime.Milliseconds * speed);

The User

c# handles vector normalization for you?

Shiro

its just a calculation

normalizedVector = (x/vectorLength, y/vectorLength)

vectorLength = Sqrt(x^2 + y^2);

its not about C#

its the Vector2 class implementation

The User

oh

Shiro

Vector2.Normalize(...)

thats how you call a static method

from class Vector2

The User

I see

Shiro

2:35 AM

so you actually are using lwjgl

not just openGL

so thats good

The User

yeah, it comes with a lot of classes you probably saw in the repository

Shiro

yea i see it now

you should tag your questions lwjgl then also

and learn how to properly write java as well

The User

The horrible formatting or bad naming conventions?

Shiro

you didnt need to define the A B C vector inside class AABBDemo

you can just use a "temp" variable

inside the Update() method

the only thing you need is Rectangle Player and enemy

the other stuff, can be calculated

inside Update()

you need to put the variables

in the proper scope

the code you showed me

would be impossible to read, on a real game

you wouldn't understand what variable does what

The User

I pretty much threw together what worked for the demo. Didn't think it was that harsh to read for others

Shiro

2:41 AM

even for you

its impossible, trust me

this is how my game hierarchy looks on a simple breakout game

its about 6k lines of code

The User

With reusable classes?

Shiro

and its just a simple game

The User

It does look nice

Shiro

i mean

you can "reuse" it

in monogame

its just a bunch of variables

and functions and classes, everything is reusable.. yea

hastebin.com/dotafuxeju.vala

this is how i made a trail for example

for the ball

this is how the trail looks like, its a flame

The User

woah

Shiro

2:46 AM

public Trail Trail { get; set; }, thats a Trail variable

named "Trail"

inside the ball class

Trail = new Trail(25);

initialize a trail of 25 "small flame balls"

call Trail.Update(Position);//Update trail

to update the trail based on the balls "Position"

and

ball.Trail.Draw(spriteBatch);

draw the ball's trail

thats it

3 lines, makes a trail

The User

But don't you loose time making code that organized?

Shiro

this is how you are supposed to write code, by law

its like saying

you waste time writting words in lines

thats how you write, to read it the next day

when you have 6k lines of code, for an unfinished game

with no levels

you can only imagine, that you would take FOREVER to debug the code

The User

true

Shiro

without proper syntax, naming, format

The User

one sec

Shiro

2:52 AM

take a look

how my Update method looks

my main game update method, and compare its size to your game

hastebin.com/yarutayoya.avrasm

i even write comments in english

when i am greek :P

so just think that, on a "game" 500 times more complex than yours, my main Update method is 25 lines long

and your update is 17 lines

The User

hah wow

Shiro

if (InputHandler.Released) ExplosionHandler.CreateExplosion(InputHandler.Position, Explosion.ExplosionType.Default, 15);

this line

is not nesseceray

i am just testing a particle engine

when the ball hits the wall

there is an explosion

same when it hits the paddle

The User

I have to go to bed at the moment, but I'll stay logged in in case you say anything else.

Shiro

me too, good luck with you coding ! :D

The User

Thanks again.

Shiro

2:57 AM

check the update method i have

and organize it like this too

you should have a class entity

with properties

Rectangle Bounds; for example

and have a method Update inside that class

So you would make

Entity player = new Entity(100,100,50,90);

and then call player.Update();

inside the "main" update

good luck with your game

The User

you too!

Shiro

you entity class, should also have methods "initialize" and "draw"

and "load" to load a texture to the entity object

just think, how would you add a second player to your game

if you had to add more than 2-5 lines, to add a player to your game

you are doing it wrong

:)

The User

11:01 AM

my mouse is messed up. eh

The User

8:19 PM

So are you doing Ludum Dare?

Shiro

11:26 PM

i haven't heard that game

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