Lua Programming Help Thread

Zitat:

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Zitat von Grimfate126

hi all, i need help. i want to load many images with one command.i tried this:

Code:

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ct = {}

for a = 1, 300 do

ct[a] = Image.load("ct..a...png")

end

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the images are: ct1.png, ct2.png... all the way to 300. BUT when i start it, luaplayer says it had an error loading this image. :(

pls help me!

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how about taking out two of the periods.
like:

Code:

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ct[a] = Image.load("ct..a.png")

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...unless the names of your images have two periods after the numbers, then I dont know.

no you need two periods to concatenate.

Zitat:

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Zitat von EminentJonFrost

how about taking out two of the periods.
like:

Code:

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ct[a] = Image.load("ct..a.png")

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...unless the names of your images have two periods after the numbers, then I dont know.

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nope, ur and altairs method dont work. i think there was another guy who asked this, and pspmillionaire side you had to use a "tostring" function to get it to work. i cant find that page tho. :(

Code:

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ct = {}

for a = 1, 300 do

ct[a] = Image.load("ct"..a..".png")

end

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doesn't work? Do you have the pics in the same folder as the lua file?

Zitat:

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Zitat von Altair

Code:

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ct = {}

for a = 1, 300 do

ct[a] = Image.load("ct"..a..".png")

end

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doesn't work? Do you have the pics in the same folder as the lua file?

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wow, now that works.. weird. thx!

not weird at all. And no prob! What was it? the quotations or the place of the pics? If you want i can explain it.

Zitat:

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Zitat von Altair

not weird at all. And no prob! What was it? the quotations or the place of the pics? If you want i can explain it.

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i havent the sligest idea. first it didnt work i copied your code. and bam, it worked. YOUR MAGIC. :Jump: :Jump:

abracadabra!
hehe, nice to hear

oh...i get it now.
i didnt know that worked with images too...
Does it pretty much work wherever qoutation marks are used?

Okay this is getting on my last nerve.... ive tried a MILLION things and it wont do what i want it to do... i need to have it so when I press triangle it plays it back. But currently i have to hold it. also whenever i playback once it wont work again, ill have to restart the app to make it playback again... oh and it only plays 3 frames not 6

Code:

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System.usbDiskModeActivate()

oldpad = Controls.read()

red = Color.new(255,0,0)
black = Color.new(0,0,0)
white = Color.new(255,255,255)

f = {}
f[1] = Image.load("frame#1.png")
f[2] = Image.load("frame#2.png")
f[3] = Image.load("frame#3.png")
f[4] = Image.load("frame#4.png")
f[5] = Image.load("frame#5.png")
f[6] = Image.load("frame#6.png")

canvas = Image.createEmpty(480, 272)
canvas:clear(white)
 
x0 = 200
y0 = 200
x1 = 100
y1 = 100

frame = 0
speed = 1
counter = 0

function playback()
counter = counter + speed
 if counter == 1 then
  screen:blit(0,0, f[1])
  screen.flip()
  screen.waitVblankStart(5)
 elseif counter == 2 then
  screen:blit(0,0,f[2])
  screen.flip()
  screen.waitVblankStart(5)
 elseif counter == 3 then
  screen:blit(0,0, f[3])
  screen.flip()
  screen.waitVblankStart(5)
 elseif counter == 4 then
  screen:blit(0,0,f[4])
  screen.flip()
  screen.waitVblankStart(5)
 elseif counter == 5 then
  screen:blit(0,0, f[5])
  screen.flip()
  screen.waitVblankStart(5)
 elseif counter == 6 then
  screen:blit(0,0, f[6])
  screen.flip()
  screen.waitVblankStart(5)
 end
end

while true do  --MAIN LOOP

canvas:print(2, 20, "Frame: " .. frame, black)

pad = Controls.read()
dx = pad:analogX()

if math.abs(dx) > 32 then
  x0 = x0 + dx / 64
end

dy = pad:analogY()

if math.abs(dy) > 32 then
  y0 = y0 + dy / 64
end

if pad:cross() then
  canvas:drawLine(x0, y0, x1, y1, black)
end

if pad:r() and oldpad:r() ~= pad:r() then
  frame = frame + 1
  screen:save("frame#" .. frame.. ".png")
  canvas:clear(white)
end

if pad:triangle() then
  playback()
end

if pad:square() then
  canvas:clear(white)
end

if pad:start() then
  break
end
 
  x1 = x0
  y1 = y0
  screen:blit(0, 0, canvas, 0, 0, canvas:width(), canvas:height(), false)
  screen:drawLine(x1 - 5, y1, x1 + 5, y1, red)
  screen:drawLine(x1, y1 - 5, x1, y1 + 5, red)
  screen.waitVblankStart()
  screen.flip()
  oldpad = pad
end

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