Lua Programming Help Thread

Zitat:

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Thanks EminentJonFrost, but it still creates a stackdump file. I spaced out everything that was cramped on the equal sign; the new code:

Code:

---

red = Color.new(255,0,0)
green = Color.new(0,255,0)
blue = Color.new(0,0,255)
white = Color.new(255,255,255)

duh = Image.load("duh.png")
counter = Timer.new()
counter:start()
screen:blit(50,50,duh)
while true do
pad = Controls.read()

if pad:up() then
duh.y = duh.y + 2
end

if pad:down() then
duh.y = duh.y - 2
end

if pad:right() then
duh.x = duh.x + 2
end

if pad:left() then
duh.x = duh.x - 2
end

currentTime = counter:time()
screen:clear(blue)
screen:print(10,10,"Counter Time: " .. currentTime, white)

if currentTime > 2500 and currentTime < 5000 then
screen:clear(red)
end

if currentTime > 5001 then
counter:reset(0)
counter:start()
end

---

And the stackdump file: (not sure if it changed)

Code:

---

Stack trace:
Frame    Function  Args
7C8107FD  7C81084D  (32000000, 907C83AB, 90909090, FC489D39)
 322869 [sig] luaplayer 2956 handle_threadlist_excepti  on: handle_threadlist_excepti  on called with threadlist_ix -1
 339374 [sig] luaplayer 2956 handle_exceptions: Exception: STATUS_ACCESS_VIOLATION
Exception: STATUS_ACCESS_VIOLATION at eip=61015E82
eax=00FFFFFF ebx=610E7ECC ecx=00000000 edx=FF001CC6 esi=00000001 edi=00000001
ebp=00A2E6E8 esp=00A2E6E4 program=C:\Documents and Settings\FattyMcFat\Deskt  op\luaplayerwindows\luapl  ayer.exe, pid 2956, thread sig
cs=001B ds=0023 es=0023 fs=003B gs=0000 ss=0023
Stack trace:
Frame    Function  Args
00A2E6E8  61015E82  (610E7ECC, 6110BA74, FC489D39, 00000000)
00A2E708  61015FAC  (00000001, 00A2E760, 00000000, 00000000)
00A2EA58  610179AB  (000006F4, 00A2EED0, 000000A4, 00A2EE9C)
00A2EF98  6108A497  (610E6D18, 00000000, 00000F84, 00000000)
00A2EFC8  6100327F  (610E6D18, 00A2F000, 61003160, 00000000)
00A2EFF8  61003E94  (00000000, 00000000, 00000000, 00000000)
00A2FF98  61003EDA  (00000000, 00000000, 00000000, 00000000)
End of stack trace

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Thanks in advance!

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hmm..I'm not sure. But my guess is that you change this:

Code:

---

screen:print(10,10,"Counter Time: " .. currentTime, white)

---

To This:

Code:

---

screen:print(10, 10, currentTime, white)

---

see if that works.

It'll only print the word currentTime.

Zitat:

---

Zitat von PopcOrn DeVil

It'll only print the word currentTime.

---

here: try this:

Code:

---


red = Color.new(255,0,0)
green = Color.new(0,255,0)
blue = Color.new(0,0,255)
white = Color.new(255,255,255)

duhx = 50
duhy = 50

duh = Image.load("duh.png")
counter = Timer.new()

while true do

screen:clear(blue)

pad = Controls.read()

screen:blit(duhx,duhy,duh)

if pad:up() then
duhy = duhy - 2
end

if pad:down() then
duhy = duhy + 2
end

if pad:right() then
duhx = duhx + 2
end

if pad:left() then
duhx = duhx - 2
end

currentTime = counter:time()
screen:print(10,10,"Counter Time: " .. currentTime, white)

if currentTime > 2500 and currentTime < 5000 then
screen:clear(red)
end

if currentTime > 5001 then
counter:reset()
counter:start()
end

screen.waitVblankStart()
screen.flip()
end

---

problems in your original code:

1.whenever you print OR blit something to the screen: it MUST be done inside a function, or a loop. you blitted "duh" in neither, so it appeared for only a bit, and then cleared.

2. at the end of your loop, you stated screen:clear(blue), and then printed the time. when you cleared, you ALSO cleared the picture, so it only showed you the time.

3. you did not give duhx and duhy a value. how is luaplayer supposed to know?

4. you did not end your loop.

5. there were more, but im too lazy right now.

bb! and good luck!

EDIT: @ EminentJonFrost, you DO NOT need spaces between your ='s, <'s, or >',s. although they do make your code easier to read.

that wont work, but only for one simple reason. the screen:clear(red) near the bottom of the loop will clear the whole screen on top of the print command and the duh image, leaving a blank red screen until it goes back to blue.

Doing ALL your screen clearing at the top is a better approach, try this one.

Code:

---

red = Color.new(255,0,0)
green = Color.new(0,255,0)
blue = Color.new(0,0,255)
white = Color.new(255,255,255)

duhx = 50
duhy = 50

duh = Image.load("duh.png")
counter = Timer.new()

while true do

currentTime = counter:time()

if currentTime > 2500 and currentTime < 5000 then
screen:clear(red)
else
screen:clear(blue)
end

pad = Controls.read()

screen:blit(duhx,duhy,duh  )

if pad:up() then
duhy = duhy - 2
end

if pad:down() then
duhy = duhy + 2
end

if pad:right() then
duhx = duhx + 2
end

if pad:left() then
duhx = duhx - 2
end


screen:print(10,10,"Counter Time: " .. currentTime, white)



if currentTime > 5001 then
counter:reset()
counter:start()
end

screen.waitVblankStart()
screen.flip()
end

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I have an question: how can i make trigger R to do multiple, Triple Things like an example below

Code:

---

if pad:r() and screen:blit(3,0, color) then screen:blit(3,50, color)
end

---

But i get error =/

Zitat:

---

Zitat von natan333

I have an question: how can i make trigger R to do multiple, Triple Things like an example below

Code:

---

if pad:r() and screen:blit(3,0, color) then screen:blit(3,50, color)
end

---

But i get error =/

---

try this

Code:

---

if pad:r() then
screen:blit(3,0, color) and screen:blit(3,50, color)
end
end

---

Zitat:

---

Zitat von natan333

I have an question: how can i make trigger R to do multiple, Triple Things like an example below

Code:

---

if pad:r() and screen:blit(3,0, color) then screen:blit(3,50, color)
end

---

But i get error =/

---

Yeah, that definitely would cause an error ;)
What exactly do you want it to do?

If you want to blit 2 images at once in one if statement then do this:

Code:

---

if pad:r() then
screen:blit(3,0, color)
screen:blit(3,50,color)
end

---

There is not limit how many lines you can put in there.

thx so much.
Now there is only one thing that i really need to learn for further releases and etc's
The code bellow is part of the script

Code:

---

if pad:cross() then
                canvas:drawLine(letterPosx, letterPosy, x1, y1, black)
        end
        x1 = letterPosx
        y1 = letterPosy
        screen:blit(0, 0, canvas, 0, 0, canvas:width(), canvas:height(), false)




screen:blit(letterPosx,letterPosy, arrow)
---------------------------------------------------
if pad:r() then screen:blit(3,0, color) end
if pad:r() and pad:square() then
if letterPosx >= 4 and letterPosx <= 16 and letterPosy >= 19 and letterPosy <= 30 then
canvas:drawLine(letterPosx, letterPosy, x1, y1, red)
end
end

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I dont know if you really going to get it.

You can see that Holding Cross and moving the arrows will have black pixels.
The Code above the ----- line is the default color of the paint (Black).
The code bellow the ---- line is what i m trying to change the black pixel to become red. The thing i want to make it work is to hold R trigger to pop up an image of a bunch of colors then select the color and press square button to activate it to change black to the color that is selected.
The code bellow

Code:

---

letterPosx >= 4 and letterPosx <= 16 and letterPosy >= 19 and letterPosy <= 30

---

is showing the red color position. so when i press square in that place, it will change black pixels to red so then i can unhold R trigger and square and press Cross and move arround with red color .

Can anyone help me with this one ?

Thanks everybody for helping me! What I did to fix the code was I used the Image.createEmpty instead of loading the image. Then I put the 0 in counter:reset(0). Now it works like I want it to. Thanks!

Zitat:

---

Zitat von Grimfate126

here: try this:

Code:

---


red = Color.new(255,0,0)
green = Color.new(0,255,0)
blue = Color.new(0,0,255)
white = Color.new(255,255,255)

duhx = 50
duhy = 50

duh = Image.load("duh.png")
counter = Timer.new()

while true do

screen:clear(blue)

pad = Controls.read()

screen:blit(duhx,duhy,duh)

if pad:up() then
duhy = duhy - 2
end

if pad:down() then
duhy = duhy + 2
end

if pad:right() then
duhx = duhx + 2
end

if pad:left() then
duhx = duhx - 2
end

currentTime = counter:time()
screen:print(10,10,"Counter Time: " .. currentTime, white)

if currentTime > 2500 and currentTime < 5000 then
screen:clear(red)
end

if currentTime > 5001 then
counter:reset()
counter:start()
end

screen.waitVblankStart()
screen.flip()
end

---

problems in your original code:

1.whenever you print OR blit something to the screen: it MUST be done inside a function, or a loop. you blitted "duh" in neither, so it appeared for only a bit, and then cleared.

2. at the end of your loop, you stated screen:clear(blue), and then printed the time. when you cleared, you ALSO cleared the picture, so it only showed you the time.

3. you did not give duhx and duhy a value. how is luaplayer supposed to know?

4. you did not end your loop.

5. there were more, but im too lazy right now.

bb! and good luck!

EDIT: @ EminentJonFrost, you DO NOT need spaces between your ='s, <'s, or >',s. although they do make your code easier to read.

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Uhm it wasn't me who needed help. I was just saying that what he wrote will just display currentTime.