Lua Programming Help Thread

You have to edit this part

Code:

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("myfile.txt","r")

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myfile.txt - name of file
r - r means it will read the file

Code:

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*n - reads a number and returns it. ex: file.read("*n")
*a - reads the entire file from the current position. ex: file.read("*a")
*l - (default) - reads the next line, returns nil on End of File (EOF). ex: file.read("*l")
number - returns a string with up to that many characters in it, or nil on EOF. ex: file.read(5)

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Heres a quick copy and paste from evilmana.com
http://evilmana.com/tutorials/lua_tutorial_09.php

i used that but it said a ')' was neaded near 'collides'
that really doesnt make sense?

You should honestly read some lua tuts before starting. Not knowing collision or file io tells me you either didn't read them, or only read to printing text. :/

what do you mean? i read all the evilmana tuts, but just had questions because they werent very in depth. Besides
i have a fully functional game with 2 images and one player the guy jumps over the 2 mines and if he touches them he returns to the beggining. i get collision i just asked for a tut on how to open a file when a collsion occurs.
forget i asked this isnt helping, but thanks to everyone foor helping me

Zitat:

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Zitat von %chrono trigger%

what do you mean? i read all the evilmana tuts, but just had questions because they werent very in depth. Besides
i have a fully functional game with 2 images and one player the guy jumps over the 2 mines and if he touches them he returns to the beggining. i get collision i just asked for a tut on how to open a file when a collsion occurs.
forget i asked this isnt helping, but thanks to everyone foor helping me

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Well, if you read the evilmana tut on collisions, then you shouldn't have had the need to ask this question.

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Zitat von %chrono trigger%

ok can you tell me what the lines of code with the arrows mean?
and what would I put in here -----> (player collides)? the 2 images?

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it says nothing about the function to open a file from a collision
i was assuming it was this part: (object,object2) but wasnt sure so i asked to be sure before i add my own code to my game

You cant expect it to show you, You just have to put 2 and 2 together.

Zitat:

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Zitat von %chrono trigger%

but wasnt sure so i asked to be sure before i add my own code to my game

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The best way to learn (and really understand) is to experiment. Look at the apps that come with luaplayer for reference (Snake is really good). Ask for help when you've exhausted every idea you've had and mulled over your problem for a while.
My advice, anyway.

yes, expirementing is the best way to understand!

:ROFL: my game is shizy and pointless:ROFL:
hey Aphonia how long did it take you to be a decent coder?

it depends on how long do you spend with coding per day/week etc
but it takes few months to be good :)

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Zitat von pspaquaforce

:ROFL: my game is shizy and pointless:ROFL:
hey Aphonia how long did it take you to be a decent coder?

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A decent coder? About 6 months. That's if you spend about an hour a day coding. A good coder? About a year.

i spend about 2hrs to 3hrs a day :PC: it's hard i hate how its case sensitive looks like i have to tri and speelllll bettteerrr. lol

The apps that come with luaplayer aren't that great to learn and expand on, the best are applications that do something similar to what you want to do, maybe having other featurews too, then see how its all integrated

i have a good base code with really good notes and i use the lua cheat sheet some what helpfull. If only I had someone at my school that actally codes.
Thier all retards some off the kids with psp's don't even know what firware is or even a umd. The computer guy sits on his @$$ all day and plays call of duty and other games and gets paid for it i would love that job:Jump:

Yeah, it's hard finding a person near you who codes. One of my friends went to college and learned C, but forgot all of it. I know way more than him.

that must of been a big waste of money
-= Double Post =-
Does anyone have that stuiped Study Island thing in school and if so is their any cheats or hacks for it

Zitat:

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Zitat von pspaquaforce

If only I had someone at my school that actally codes.
Thier all retards some off the kids with psp's don't even know what firware is or even a umd. The computer guy sits on his @$$ all day and plays call of duty and other games and gets paid for it i would love that job:Jump:

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Theres about 30 devs at the moment. And thats around the world.
And all the people at my school who know even an ounce of coding for the computer just play OmG cOuNtStRiKe!!!!111 all day. Pathetic.

Hey everyone- just a quick pregunta. When I eventually attempt to make an English-Spanish dictionary for Todo Espanol, what would be the most effective way to do that? I'd have to type up a document w/ all of the words, wouldn't I? I couldn't imagine any alternatives- that'll take a long time!

why would you turn your psp into a English-Spanish dictionary why not just buy 1 .
My spanish classes are fun last time a nice fight broke out it was sweet the kid jumped on him and started punching the living ***** out of the other kid

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Zitat von Access_Denied

A decent coder? About 6 months. That's if you spend about an hour a day coding. A good coder? About a year.

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I disagree with that (although it depends on how you define decent and good coders). For industry level, I would say at least 2 years developing a wide range of projects both individually and in groups of various sizes. For me, its taken 3 years to be good enough for the industry and another to really know my material in terms of the programming concepts and development practises in additional to my C++ skills. Even then, I am still learning every day.

i think he means just for lua

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Zitat von pspaquaforce

i think he means just for lua

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The language doesn't matter, I was referring to actually being a good programmer in general. Once you grasp the concepts of the a paradigm, you could pick up most high level languages in the same or similar paradigm ( Lua, Python, C#, Java ) quite easily in a month. The lower level languages ( C, C++, ASM ) will take longer due to the nature of the languages (Some would argue C++ would take years if not longer to fully master).

Can someone help me with my animation I have made my animation sprite which it is just rain i just need to add it in my script but it has to load when i get to the third bg, so would i do "if background3.x = true then
animation()
or something like that

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Zitat von yaustar

I disagree with that (although it depends on how you define decent and good coders). For industry level, I would say at least 2 years developing a wide range of projects both individually and in groups of various sizes. For me, its taken 3 years to be good enough for the industry and another to really know my material in terms of the programming concepts and development practises in additional to my C++ skills. Even then, I am still learning every day.

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When I said 'good', I didn't mean that he could run out and get a programming job. I meant that he'd be able to create some good homebrew games.
-= Double Post =-

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Zitat von pspaquaforce

i think he means just for lua

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yaustar pretty much answered your question, but it doesn't matter about the language. The important thing is to be able to understand and have a good knowledge of the Game Programming Theory. Once you understand that, you can easily move to any other language. I suggest that you read up on the Game Programming Theory, as it will help you code.

what exactly is this Game Programming Theory?

any help on my anamation

Any ideas for the translator? Thanks.

Zitat:

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Zitat von pspaquaforce

so would i do "if background3.x = true then
animation()
or something like that

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if Background3.x <= 480 and background3.x >= -480 then
animation()
end

That will call animation() as long as background3 is anywhere onscreen. You can tweak the numbers if you want animation() called only if background3 is mostly onscreen (try <= 240 and >= -240 for a good example).

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hey Aphonia how long did it take you to be a decent coder?

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It hasn't happened yet. I've never made anything worth releasing.

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Zitat von emericaska8r

what exactly is this Game Programming Theory?

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John Nash could be involved. That's all I know. Its useless.

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Zitat von Access_Denied

The important thing is to be able to understand and have a good knowledge of the Game Programming Theory.

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Zitat:

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Zitat von emericaska8r

what exactly is this Game Programming Theory?

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I agree "(Game) Programming Theory" is a bit of a buzzword. Game programming is no different to normal programming.

Read "Coding Complete" or "Pragmatic Programmer" at least to get an idea of common programming practises and 'thoery'.

ok thanks

aphonia thanks but i don't have any animation code at all if you code show a animation code as a function or explan it to me that would be great.
here's my animation http://img403.imageshack.us/img403/2179/frame1uu3.png

Zitat:

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Zitat von pspaquaforce

aphonia thanks but i don't have any animation code at all if you code show a animation code as a function or explan it to me that would be great.
here's my animation http://img403.imageshack.us/img403/2179/frame1uu3.png

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use animlib. search on it on dl.qj.net

(its actually called Lua Animation Lib)

download the latest version (v4 i think), cause i supports sprite sheets.

thats what i used to make this but i don't know how to use it in my script do i say dofile("animation.lua") or do i copy and paste some stuff. Because It didn't really have a good readme.

You dofile it at the begging of your code.
Then use the now functions code you can use.
Download and read the read me

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Zitat von pspaquaforce

thats what i used to make this but i don't know how to use it in my script do i say dofile("animation.lua") or do i copy and paste some stuff. Because It didn't really have a good readme.

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heh, my bad about the readme. once you have dofiled the lib, you can use its functions. call them just like any other function you would use in lua, with the correct parameters. here is a quick tut. it covers loading. blitting is much simpler, and you should be able to figure it out on your own.

http://forums.qj.net/f-psp-developme...tly-83149.html

thanks for your help

I have a problem with my code. The whole code is too long, so i'll post the snippet.

Code:

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--function for complete compounding process
functionCompound()
        --start compounding interest
        while gt - gtd > 1 do
                functionCompoundStart()
        end
        --finish compounding interest
        if gt - gtd == 1 then
                functionCompoundFinish()
        end
end

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The error I get is '<eof>' expected near 'end'. What does this mean?

Lord_Artorius, I can't tell for sure because you didn't post the whole code, but I don't think you're defining your functions right, because this works:

Spoiler for code:

Code:

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gt=70
gtd=1

function CS () --Made all this stuff up just to check it
if gt - gtd > 1 then
gtd = gtd-1
end
end

function CF()
gt=70
gtd=1
end

function Compound()
        --start compounding interest
        while gt - gtd > 1 do
                CS()
        end
        --finish compounding interest
        if gt - gtd == 1 then
                CF()
        end
end


 while true do
screen:clear()

Compound()


screen.waitVblankStart()
screen.flip()
end

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Put a space between 'function' and what you want the function to be called, and call the function with just the name, not 'function name' or 'functionname'.

Also, <eof> stands for 'end of file.'

is there a way to unincode my code if i used lua compiler?