Lua Programming Help Thread

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Zitat von c5cha7

Please could someone help?
Sorry on such short notice but i have a small problem....
Well i have made my Sprite's and character's and done all the code for my game BUT, Know my character cant jump properly?
Oh and how can i make barrier's?
Like on mario when you can jump on the ledge above.
I just really need to know how to make barrier's so my player can
hit thing's and stand on them lol.

Thank's in return.

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I would like to know the same

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Zitat von XteticX

I think I understand what you mean by ARCing down. Make the bullet fall on the ground after a while right? Anyway, here's a cheap way you could do it.

I'm assuming the bullet's Y is "bulletY", so here goes.

Code:

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function bulletGravity()
local CurrentY=bulletY
local time=0
time=time+1
 if time>=50 then --WHEN THE BULLET START'S DROPPING DOWN
  for y=CurrentY,272 do --FROM TRAJECTORY TO BOTTOM OF SCREEN
    bulletY=bulletY-0.5
  end
 end
end

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That would be like I said a cheap trick. But then again, I never saw your code and this might not be the best idea. :neutral: On top of that, it might freeze the game and make the bullet stop going forward if its used as a single function. Your best bet would be to create one big function and have the bullet's velocity ,arcing effect and what not into one function.

Anyway good luck.

(sorry for the double post.)

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Thanks and you were right on thats what i wanted!

anyway, i have just figured out the resizer function and it works! its sweet!

Well, now all ineed is to know how to make a sidescroll type of thing, but its not really a sidescrolling thing, its more ofa one picture backround flying horizontly past the screen over and over again so can someone please help me with this?

Thats called sidescrolling :D ....

Umm, Help SG57 and I make a sidescrolling BG, because i need the same

somebody answered me awhile back buttt...

they just said something about a bgXy + 479 and stuff like that heres the post:

"I have a number, bgX, that is default 0
now think about this, i said that if its < 0, then blit the image at bgX and bgX+479
if its after 0, then make it bgX-480
if its less than -(480-480) then make it -480

if you push left or right, make bgX + or -"

can someone explain this alittle better or give me an example of a sidescrolling game?

also, like in the lua windows shell, how do you make it so if you go over a thing, in my case its a menu, it lights up a bit or if you push X on that certain thing/pixel, it does my own file, i know how to do the:

dofile("script.lua)

type thing, anyone can help? thanks alot if yu can!

Hmm.
I Would actually like to know how to make a sidescrolling background.
That would be a nice addition to my game lol.
But barrier's would still be nice :icon_bigg

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Zitat von SG57

also, like in the lua windows shell, how do you make it so if you go over a thing, in my case its a menu, it lights up a bit or if you push X on that certain thing/pixel, it does my own file, i know how to do the:

dofile("script.lua)

type thing, anyone can help? thanks alot if yu can!

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Hmm..
I Could help you with that
Here \/

Code:

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screen:blit(18, 18, image)
        if x0 < 50 then
                if x0 > 15 then
                        if y0 < 60 then
                                if y0 > 15 then
                                screen:blit(18, 18, highlighted)
                                          if pad:cross() then
                                dofile("script.lua)
                                end
                        end
                end
        end

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Or something like that.
If it's not a mouse then change these \/

Code:

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        if x0 < 50 then
                if x0 > 15 then
                        if y0 < 60 then
                                if y0 > 15 then

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That's all i can do for know lol.

would putting numbers in the () for "if pad:start(###) then" mean if start is held for ### time then, or how eles could this be done?

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Zitat von sofa king dumb

would putting numbers in the () for "if pad:start(###) then" mean if start is held for ### time then, or how eles could this be done?

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I dont think pad:start() can hold any arguments. Just create a simple loop. Someting like:

Code:

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while pad:start() do
time=time+1
  if time>=50 then
    time=0
    "execute and action here"
  end
end

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I never tested if "while pad:start() do" would work. It should. lol :icon_bigg

THAN

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Zitat von c5cha7

Hmm..
I Could help you with that
Here \/

Code:

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screen:blit(18, 18, image)
        if x0 < 50 then
                if x0 > 15 then
                        if y0 < 60 then
                                if y0 > 15 then
                                screen:blit(18, 18, highlighted)
                                          if pad:cross() then
                                dofile("script.lua)
                                end
                        end
                end
        end

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That's all i can do for know lol.

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THANKS, and ya its with a mouse and i just tried it and it said line 26: trying to compare nil value, so that means at the start of the if statements is where the error is so

, now if iwanted to changed where the cursor would go over, say pixel (232, 131) but not that specific pixel, but its a rectangle area, so the area between pixels (232, 142), (249, 142) ,(232, 131) and (249, 131), then what would i do? and its with a cursor.

EDIT

o forgot one major question for my game...how do i rotate an image not 90* like in the function in the developers dungeon, but say like 10* if i press up and down 10*... thank you alot if you can help at all