Lua Programming Help Thread

Zitat:

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Zitat von Sousanator

can you have functions within functions?

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yes you can.

Zitat:

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Zitat von Greenskull

Code:

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frame_1 = Image.load("frame_1.png")
frame_2 = Image.load("frame_2.png")
frame_3 = Image.load("frame_3.png")
screen:clear()

while (true) do
--Put image to memory and flip it to screen
        screen:blit(0, 0, frame_1)
        screen.flip()
--Keep frame showing for 8 milliseconds
        screen.WaitVblankStart(8) 
--Clear screen to start over
        screen:clear()

        screen:blit(0, 0, frame_2)
        screen.flip()
        screen.WaitVblankStart(8) 
        screen:clear()

        screen:blit(0, 0, frame_3)
        screen.flip()
        screen.WaitVblankStart(8) 
        screen:clear()
end

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I was told to do this buit it says the waitVblank thibg is wrong. help please

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yeah. It says something like "attempt to call WaitVblankStart (nil value) help please!

EDIT: aha! The "w" was capitalized. im good now:D but how do I make my animation loop over and over until I press X again?

Zitat:

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Zitat von Greenskull

yeah. It says something like "attempt to call WaitVblankStart (nil value) help please!

EDIT: aha! The "w" was capitalized. im good now:D but how do I make my animation loop over and over until I press X again?

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try this:

Code:

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white = Color.new(255, 255, 255)
frame_1 = Image.load("frame_1.png")
frame_2 = Image.load("frame_2.png")
frame_3 = Image.load("frame_3.png")

showAnimation = true
timer = Timer.new()

while true do
        pad = Controls.read()
        timer:start()
        screen:clear()

        if showAnimation then
                if timer:time() >= 0 and timer:time() <= 135 then
                        screen:blit(0, 0, frame_1)
                elseif timer:time() > 135 and timer:time() <= 270 then
                        screen:blit(0, 0, frame_2)
                elseif timer:time() > 270 and timer:time() <= 405 then
                        screen:blit(0, 0, frame_3)
                elseif timer:time() > 405 then
                        timer:stop()
                        timer:reset()
                end
        else
                screen:print(0, 0, "Paused!", white)
        end

        if pad:cross() and pad ~= oldpad then
                if showAnimation then showAnimation = false else showAnimation = true end
        end

        oldpad = pad
        screen.flip()
        screen.waitVblankStart(6)
end

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Zitat:

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Zitat von Grimfate126

EDIT: how can i make it so that the maht.random(26) doesnt take the same value twice??

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here's the updated version of your deal or no deal script.it should work... it only takes each prize value once. from $0 to $1,000,000. The reason you had so many repeats is you had a couple prize values the same. This also displays the prize value in $0.00 format.

Code:

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      pad = Controls.read()
      oldpad = Controls.read()
     
      if pad:right() and pad ~= oldpad then
        x = x + 10
        oldpad = pad
      elseif pad:left() and pad ~= oldpad then
            x = x - 10
            oldpad = pad
      end
      if pad:start() then
        break
      end

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Ok, the blipping stopped, but the highlighter doesn't move at all now. Which is fairly logic, because if right() is pressed, both pad and oldpad would be right(), so the if value would not be true.

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Zitat von cools

Sorry, I forgot to mention it...

Well whenever i try to play that along the with the game, it only plays the music and doesnt let you play the game.

It will play along side game if i only tell it to playback one of the music files.

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Ah yeah thats what i thought. Its because you pause the loop by using the waitVblanck's. So what you have to do is make a timer and if the timer is at a specific value (the length of your music) then you play the other musicfile.

@SjaakRake

I dont know why people use that code, but i know this works:

Code:

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pad = Controls.read()

      if pad:right() and pad ~= oldpad then
        x = x + 10
        oldpad = pad
      elseif pad:left() and pad ~= oldpad then
            x = x - 10
            oldpad = pad
      end
      if pad:start() then
        break
      end

oldpad=pad

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With this it puts the value of pad in oldpad after everything is done, so when it does a new loop then it has the value of the last loop and that is what you want.

Haha, thanks, I'm so damn stupid, pretty logic.
PS. As you might have guessed, I'm dutch too, if you're interested in contacting me. PM me.

Zitat:

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Zitat von Altair

Ah yeah thats what i thought. Its because you pause the loop by using the waitVblanck's. So what you have to do is make a timer and if the timer is at a specific value (the length of your music) then you play the other musicfile.

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Ok, so it was the screen.waitVblank's that were messing up the code and I only need to change it to a timer. Thanks Altair!

no problem at all. Im looking forward to playing monopoly on my PSP!