yes, bro u are true I failed more than a 1000 times in programming but i feel like i know most of the things than an IT Professional, because i am just 15 year old kids, the guys who came from the college was struggling to code as a fresher in companies, but i would write faster than them

Truth has been said. Thanks!

isnt that what he is saying, that the velecoity is so large it overflowed to a negative so it couldn't be recovered even with spam space?

@@gregcruz6517 It's been two years so I apologize for any inaccuracy in advance. I guess what I meant to say two years ago was that he spam space and cause the bird to fly offscreen. Since we don't know its actual height at the time, we can assume it has reached quite a long distance from the original screen, giving it the illusion that the bird might not be falling at all. But it did fall. The gravity he implemented cause the bird to accelerate downward very fast without a limit. So if it reach 3 times the height of the screen it will fall 3 times as fast (Take this with a grain of salt, it depends on the code). On whether or not the velocity actually overflowed, Lua usually uses 64-bit (depending on how the program is compiled, it also can be 32 to 8 bit which is still a very large number) for integers so I find it quite hard to achieve that within a short time frame.

@@imie-nazwisko funny to see that u came back after 2 years :0

can you please help me with fixing this bug?

@@user-uh7lr6bo7w Just like in Pong, you use math.max(0, self.y + self.dy * dt) to prevent flappy bird from going over the top

@@nazarkhan1491 thanks))

haha i just commented almost the same thing! Howdy from the future :)

ok nevermind i have made it later in the lecture now, ever since the guy came up to play the game - they answer his questions - great job colton i wouldnt have been able to win them over

@@joesilva3519 lol I had the same reaction. It seems like people got more and more comfortable with asking questions as the lecture went on.

To be fair, I just did the previous lecture the day before, and already forgot the exact answer to some of the questions. When people don't know the *exact* answer, they're less likely to risk being wrong by answering at all.

you can, but i think the goal by flipping the image is to save memory by only loading in one image

The fundamental idea is that, because the background is the same image twice, you can simply shift the background back to the right once it goes left far enough and make it appear like it is still in the same place. This allows us to create the visual illusion that the background scrolls forever. This works because the game actually updates a lot faster than our eyes can process, so we never see the transition. As for using the modulo operator, it is basically a short cut. You could just check to see if your image has scrolled past half of the image width and then subtract that amount to move it back, to do the exact same effect. Modulo returns the remainder of a long division. In this case, since we are dividing it by that half-way point, that remainder will be the amount we want to scroll the image anyway. Right up until it passes that half-way point which will then snap it back. Same outcome, but less code. I would say feel free to write the code in the way that makes the most sense for you now and worry about optimizations and brevity later when you feel more comfortable.

Line by line: - assert(self.states[stateName]) - all this is doing is checking if the state exists in the list of possible states - self.current:exit() - calls the exit function of the current state being updated/rendered - self.current = self.state[stateName]() - creates a new instance of the state being switched to (and changes the current state to it so that the StateMachine's update/draw functions will update/render the correct state) - self.current:enter(enterParams) - calls the enter function of the new state The enter() and exit() functions here aren't used and don't do anything - they are there in case the programmer has implemented some kind of transition (e.g an animation that should be played) between states. Here, the exit() and enter() calls don't do anything - all the function is doing is setting the current state to the new state so that the new state is the one being updated and rendered. Hope that helped!

tal vez no esta el .lua "Class" en la carpeta del bird 2, por eso dice que es de valor nil, que significa vacio, o ninguno, a mi interpretacion

@@joaquinhernandez9995 buenas! Ya lo solucione, había escrito Bird pero la clase se llamaba "bird"

U have to add a class module and name it class.lua u can search class module in GitHub and paste it in ur code

Shreyash, that solution works fine for a small game like this, but if you have a larger code base with hundreds of different things that may potentially react to user input, putting them in `love.keypressed` is not sustainable, so the approach I offer here would be better! But sure, for a game like this that's totally fine!

Understood. My thanks, sir

Had the same question, thanks Colton for replying

local variables actually mean that the variable is limited to use only in that file. we define it as local because lua automatically sets all variables to global, but if we have a very generic variable which we know will be unique to this file, we can define it as local to reduce our chances of accidentally calling a different variable in another file the same name. this would also be helpful when working with other programmers on a project, so different variables dont link to each other because they have the same name

try to visualize what he's saying.

You create a gameState='paused'. If gameState is not paused, you tell update to perform all of its functions.

A gamestate and keypressed function is all that it takes

lua

For coding purposes using Microsoft visual studio code. and if you are looking for three dots with the red green and yellow colour it's the it's the Mac OS

@@Goyal_Sahabb sir for Windows which application I have to download

Microsoft VisualStudio Code. Also watch videos on how to Install extension of Love-2d In Visual Code. After installing the Vs Code

You'll need to be more specific!

the things are that this is being shown on screen after a run on screen Error lib/push.lua:101: attempt to call field 'getPixelScale' (a nil value) Traceback lib/push.lua:101: in function 'initValues' lib/push.lua:48: in function 'setupScreen' main.lua:74: in function 'load' [C]: in function 'xpcall' [C]: in function 'xpcall' sir this is in all files for love2d

@@RS_Gaming_0000 getPixelScale has been replaced with getDPIScale in the current version of LOVE2D In push.lua you'll want to replace any love.window.getPixelScale() with love.window.getDPIScale() That should fix the errors

@@roflc0pterable Thank you

@@roflc0pterable thank you for the code.

yea me too, i didnt find the source code for the pong game

@@badihaboulhosn8178 for what it's worth I never found the source code that worked. I keep thinking that puzzling through everything helped me learn but 5 months later I'm still really clueless and my flappybird clone barely works.

hello, you have no problems starting the game? I can not because it tells me that the push does not exist or something like that. please helppp

Yeah me too =((

This code is just shifting the new pair's vertical position from the last pair's position by a random number between (-20,20) while restricting the new pair's vertical position within the virtual height of screen.

1) lua lets you omit () if the only argument of a function is one table 2) he doesn't invoke any function, he is defining one (lua lets you define function almost everywhere)

Thank you man, so this is just working like a block of code. ['title'] is itself a function. Now i get it. Thanks.

You are right! But later the collition logic should be changed because the upper pipe object (not the render) is still actually overlapping the lower one

Have you changed getPixelScale() to getDPIScale()?

@@capnjon6835 hey, i'm still in the beginning of the video and i'm having the same problem. is that fix like later on in the video or is that something i could do now?

@@xbananaheadx Do it now and changed it at push.lua. it will be right there in the middle of the code

*change

Löve enables you to start up 2D projects very easily. Unity can be used for 2D as well but it's primarily a 3D development environment so doing simple 2D projects would not be as simple as doing them with löve. Unity also has an extensive and complex IDE which löve lacks so Colten can focus just on the code and basic logic (rather than explaining each of the buttons)

Unity is bloat, think about the users that doesn't have a good device to run your application, Unity will make it wayyy heavier while Lua will make it lightweight and fast.

Probably because you named the file 'bird.lua', the original github file is named 'Bird.lua', try changing it and see if it works?

@@skysong8140 Ha ha what's funny is that I orginially named it "Bird.lua" but it didn't work and when i changed it to "bird.lua" the code worked. Idk why. Thanks for the reply though

Lua

@@RahulMishra-np7fw What is this "Lua"?

@@techbarikcom its a programming language

9/10 of the trick of getting into this is installing lua, löve2d, and some kind of editor or ide (“integrated development environment“) to make all this work. I just did all this myself a couple days ago & I completely forget all the ins and outs, it’s so convoluted.

Copy what's here in a file named "push.lua", and put it in your game folder: github.com/Ulydev/push/blob/master/push.lua

@Tahmid so u use a folder for the game put the push file in the same folder. If you are using VS code it has to appear in the same workspace.

that isn't necessary since the dy will increase every frame because of the calculation above it and increasing it further is redundant and hard to manage as well.

@@iconic410 is necessary to make velocity frame rate independent

the velocity is always changing when the game is running and that's good enough

@@iconic410 only if you don't care to make it correct 👍

Ok

First of all the value of PIPE_HEIGHT in main hasn't been declared. That really got thinking about it over and over

I don't get any of it either. Wtf is for k and tables

@@jacoblu51 I got it finally, you just need to understand the variables and loops in lua... Pipepairs is one class and pipe comes within the pipe class which defines how the pipe will be in the pipepair. The rendering part of pipe is explained by love2d website

Ah

:o

he has a limited time, realise that before stating something. also if you don’t understand anything, you most likely haven’t done the cs50x version of pong. live coding takes time and results in many errors

dude you got recked

Jacob Lu what? he didn’t even reply to me, and I am most likely right. sure for stuff like web development and cs50x, they can live code because there is hardly anything. but for game development you can’t assume that he is going to live code, considering you get like 10 errors if you mess something up

rekt

This course is the one meant for those who have had at least one year of prior programming experience, or maybe less if you've already used LOVE2D or Lua. That might be your problem. Also, in the introduction (0:35), he placed a couple of email addresses. There's a chance he might answer. If not now, he might when schools reopen. No guarantee.

Ok, thanks

pretty sure you can do it on raspberry pi. So dont worry, as long as it runs a text editor and a command line you can do a ton.

a wooden laptop

To be able to run Love, any laptop which supports OpenGL2.0. If you have an older machine that doesn't support OpenlGL 2.0, you may use an OpenGL software emulator, like Mesa3D.

asus preditor 21x