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function arguments?

 
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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Fri Dec 09, 2005 5:16 am    Post subject: function arguments? Reply with quote
Code:

function  blitCursor()
cursorscreen:clear
cursorscreen:blit(x,y,cursor)
screen:blit(0,0,cursorscreen)
screen.flip()
end

D:\pspstuff\devel\LuaIDE\luac.exe: D:\pspstuff\devel\luaplayeremu\gfxtest2.lua:46: function arguments expected near `cursorscreen'

It looks like the debugger thinks that 'cursorscreen' is a function. How can I get this to work? The code works if I place it outside function blitCursor()
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JEK



Joined: 03 Sep 2005
Posts: 12
Location: Norway
PostPosted: Fri Dec 09, 2005 5:47 am    Post subject: Reply with quote
Change:
Code:

cursorscreen:clear


to something like this:
Code:

black = Color.new(0, 0, 0)
cursorscreen:clear(black)

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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Fri Dec 09, 2005 11:45 pm    Post subject: Reply with quote
Line 46 is the line below that one, with the blit function, so I don't think there's anything wrong with the :clear line. I'll try it though
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cancan



Joined: 18 Nov 2005
Posts: 30
Location: France
PostPosted: Sat Dec 10, 2005 12:18 am    Post subject: Reply with quote
I think that
Code:
cursorscreen:clear()

should be enough.
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JoshDB



Joined: 05 Oct 2005
Posts: 87
PostPosted: Sat Dec 10, 2005 1:05 am    Post subject: Reply with quote
^^^^^^^^^

That's correct. Same thing for pad:sqaure(), etc. I'm pretty sure it's because they're bools.
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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Mon Dec 12, 2005 3:04 am    Post subject: Reply with quote
excuses too all. JEK was right. Works now.

It's strange though, when I call this func:
Code:
function  blitCursor()
System.sleep(100)
cursorscreen:clear()
cursorscreen:blit(x,y,cursor)
screen:blit(0,0,cursorscreen)
screen.waitVblankStart()
screen.flip()
end


Lowser briefly flashes through the screen and then my programme comes up
again. Anyone knows why? At the fifth line of my app I called screen:clear(black). And lowser is rendered to screen, so it should be wiped clean, right?

-edit- This doesn't happen if I call cursorscreen:clear(black), but all is wiped from the screen :-( sigh
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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Sat Dec 17, 2005 6:43 am    Post subject: Reply with quote
I hope someone can give me a solution. it's a real pain! Another example: two functions: one for blitting a list of Directory contents and the other for blitting the cursor. both blitted to screen. I call screen:clear(black) and then both functions. The sript waits for imput and on down, edits y value of cursor, screem:clear(black) again and both functions etc. etc.

What happens? I get a screen filled with vertical stacked cursors! And I told it to clear the screen! That's weird, isn't it?
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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Sun Dec 18, 2005 8:03 am    Post subject: Reply with quote
I think i'm not making things clear. the full code:
Code:

--System.usbDiskModeActivate()
white = Color.new( 255, 255, 255)
black = Color.new(0,0,0)
screen:clear(black)
icon = { dir = Image.load("dir.png"), txt = Image.load("txt.png") }
--browser = Image.createEmpty(480,272)
--cursorscreen = Image.createEmpty(20,272)
cursor = Image.load("cursor.png")
CurrentDir = "ms0:/psp/music"
contents = System.listDirectory("ms0:/psp/music")
DimC = table.getn(contents)
-- first, all functions are defined. Program execution starts later.

function cleandir()
   i = 3
   while i <= DimC do --delete unsupported entries from contents
      --print(i,contents[i].name)
      dot = string.find (contents[i].name, "%.")
      --print(i,dot)
         if dot == nil then -- if it is a dir
         
         else
            prevdot = 0
            init = 1
             while dot ~= nil do
               prevdot = dot
               init = dot + 1
               dot = string.find (contents[i].name, "%.",init)
            end
         ext = string.sub (contents[i].name, prevdot + 1)-- read last 3 chars from filename
         --print(ext)
         
         if  ext ~= "TXT"  then -- WARNING case sensitive
            table.remove (contents, i)
            --print("removed")
            i = i - 1
            DimC = table.getn(contents)
            --print(DimC,i)
         end
         
      end
   i = i + 1
   end
end

function  blitCursor()
--screen:clear(black)
screen:blit(u-25,v,cursor)
--screen:blit(80,0,cursorscreen)
screen.waitVblankStart()
screen.flip()
end

--print(y)
-- output contents
function OutputContents()
i = 1
x = 100
y = 10
screen:clear(black)
DimC = table.getn(contents)
--print(DimC)
while i <= DimC do
dot = string.find (contents[i].name, "%.")

   if contents[i].directory == 1 then
      screen:blit(x,y,icon.dir)
      screen:print(x+25,y,contents[i].name,white)
      y = y + 14
   
   else
      screen:print(x+25,y,contents[i].name,white)
      screen:blit(x,y,icon.txt)
      y = y +14
   end
i = i +1
end
screen.flip()
end


--x = 100 unneeded?
--y = 10
--i = 1

function ButtonResponse()
n = 1
u = 100
v = 10
confirm = 0
DirDepth = 0
while confirm == 0 do
pad = Controls.read()
 
   if pad:down() then
    if v+14<=10+DimC*14 then
       n = n+1
       v = v + 14
       --screen.flip()
       screen:clear(black)
       OutputContents()
       blitCursor()
       System.sleep(100)
    end
   
    elseif pad:up() then
    if v>10 then
       n = n - 1
       v = v - 14
       --screen.flip()
       OutputContents()
       blitCursor()
       System.sleep(100)
    end
   
   elseif pad:cross() then
      print(i)
      if contents[i].directory == 1 then
         if DirDepth > 0 then
            -- nothing
         else
            CurrentDir, PrevDir = CurrentDir..contents[i].name, CurrentDir
            contents = System.listDirectory(CurrentDir)
            DirDepth = DirDepth + 1
            CleanDir()
            OutputContents()
         end
      else
       File = CurrentDir..contents[i].name
       confirm = 1
      end
   end

end
end
--end

-- execute code
cleandir()
OutputContents()
n = 1
u = 100
v = 10
ButtonResponse()

-- draw result
screen.flip()
System.sleep(3000)
--while true do
--screen.waitVblankStart()
--end

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