Lua Programming Help Thread

[matriculated]

player:width

Do you really mean player.width?

That for b loop is kind of useless.

You're blitting the screen and then clearing it. You're essentially doing nothing to the screen. ???

[Mast3r_Shak3]

Im not sure. I based that part off of PSPMillionaire's tutorials. I'll try it later though. (Doing homework right now, or at least im supposed to ;) )

[soadnation]

Altair, i get the error on line 314 whidch is thise line

	if write==1 then
		loadHighscore()
		if high<score then
			high=score
			saveHighscore()
			write=2
		end
	end

also I'm pretty sure the error is only in the loadhighscore function because earlier I had called the function at the start and then had it print the highscore(so you knew what u had to beat) and it gave me the error that it cant display nil.

[Jeremy1026]

	if write==1 then
		loadHighscore()
		if high<score then
			high == score
			saveHighscore()
			write=2
		end
	end

[Mast3r_Shak3]

Can anyone recommend (and link if possible) a good text editor?

[soadnation]

	if write==1 then
		loadHighscore()
		if high<score then
			high == score
			saveHighscore()
			write=2
		end
	end

that wotn work because im not comparing the high variable and score variable right there. im assigning the high variable the value of the score variable because the save function saves the high variables

[Mast3r_Shak3]

Yeah, but with that. You are reassigning the high variable. Even though thats not how you would do it normally, I would give it a try

[PSPMillionaire]

Im not sure. I based that part off of PSPMillionaire's tutorials. I'll try it later though. (Doing homework right now, or at least im supposed to ;) )

player:width()

will get the width of the image "player"

of course normally i would do something like

player.width = player:width()

[Mast3r_Shak3]

Hmm... But can anyone help me out with that error? My code is on the page before this. (And the reason that segment of code is there is to prevent the character from going offscreen when I move him)

[PSPHax0r9]

Can anyone recommend (and link if possible) a good text editor?

Check the first PSPMillionaire tutorial. It has a great highlighter for Context programmer's editor. I love it.

[PSPMillionaire]

Hmm... But can anyone help me out with that error? My code is on the page before this. (And the reason that segment of code is there is to prevent the character from going offscreen when I move him)

player:width should be player:width() :P

[Greenskull]

hey guys! How do you make a picture overlap another picture? I have a normal picture and when you press a button the old picture is supposed to dissapear and a new one come. help please!

[PSPHax0r9]

black=Color.new(0, 0, 0)

player={}
player[1]={x=240, y=250}

screenwidth=480 - player:width()

while true do

screen:blit(0, 0, background, false)
screen:blit(player[1].x,player[1].y,player)

for a=0,10 do
screen:blit(45*a, 45*b, spike)
end
for b=0,0 do
screen:blit(45*a, 45*b, spike)
end

pad = Controls.read()
screen:clear()

if pad:left() then
player[1].x = player.x - 2
end
if pad:right() then
player[1].x = player.x + 2
end

screen.waitVblankStart()
screen.flip()
end

Try that.

[PSPMillionaire]

make some variables at the beginning of your program to store the images.

myImage = Image.load("yeahyeah.png" )
newImage = Image.load("newimage.png" )

in your code for your x button use something like

if pad:cross() then myImage = newImage end

make sure your blitting command is outside of the pad:cross() statement

ex... screen:blit(100,100,myIma ge)

[PSPHax0r9]

I think he did in his loading screen scipt, otherwise where would "player" come from in the second screen:blit? Either that or there is some made up image loading names going around here.

[Greenskull]

make some variables at the beginning of your program to store the images.

myImage = Image.load("yeahyeah.png" )
newImage = Image.load("newimage.png" )

in your code for your x button use something like

if pad:cross() then myImage = newImage end

make sure your blitting command is outside of the pad:cross() statement

ex... screen:blit(100,100,myIma ge)

thanks but I ran into a problem. When I run it and press the button, the top of the old image flickers at the top of the new image. Help please! Oh and how do you make it so the old image reappears when you let go of the button?

[PSPMillionaire]

to make it reappear put your blit command inside your pad:cross statement
could make these variables at the top of your code, or use the last, i forgot them lol..

imageOne = Image.load("whatever.png" )
imageTwo = Image.load("whatever.png" )

then your pad:cross() could look like so..

if pad:cross() then
screen:blit(100,100,image One)
else
screen:blit(100,100,image Two)
end

make sure you use screen:clear() in your while true do loop, right after it starts is a good place.

[Greenskull]

to make it reappear put your blit command inside your pad:cross statement
could make these variables at the top of your code, or use the last, i forgot them lol..

imageOne = Image.load("whatever.png" )
imageTwo = Image.load("whatever.png" )

then your pad:cross() could look like so..

if pad:cross() then
screen:blit(100,100,image One)
else
screen:blit(100,100,image Two)
end

make sure you use screen:clear() in your while true do loop, right after it starts is a good place.

sorry I'm just learning to code. I need to put a while true statement? Can you show me waht you mean please?

[PSPMillionaire]

however your programming is looping, put the screen:clear() in the loop.
paste your code if you want, and still dont understand

[Greenskull]

however your programming is looping, put the screen:clear() in the loop.
paste your code if you want, and still dont understand

mind if I PM it to you? I don't want anyone stealing my idea...

[soadnation]

Yeah, but with that. You are reassigning the high variable. Even though thats not how you would do it normally, I would give it a try

I know but thats what i want it to do. in my save funtion it saves the variable high. so if i didnt assign high the value of score to it it would save the same score as before. also you cant use == when its not part of a condition. so when i put that in it gives me an error telling me it wanted a = instead of a ==

[Mast3r_Shak3]

Hmm... I successfully got the error to go away! Now I get the error "Attempt to call method "width" a nil value. Do I need to assign a direct value to "screen:width" intead of "480-player:width"?

[PSPHax0r9]

player:width should be player:width() :P

^^^^^

[Mast3r_Shak3]

NEVERMIND

and errors are evil

[slicer4ever]

i have a question=-)

when using luaplayerwindows how do i get it to read images?

[Greenskull]

i have a question=-)

when using luaplayerwindows how do i get it to read images?

what do you mean "Read"?

[Mast3r_Shak3]

In ConTEXT editor, how do you use the lua.chl?

EDIT: agh, nevermind I found out how... This coding stuff makes me all confused lol

[slicer4ever]

every time i use a script it always say: Image.load: Error loading image.

so how do i get it to load the image?

[Mast3r_Shak3]

Post your script

[slicer4ever]

i just want it to read my pics thats all but if what i have in mind doesn't work then i well post it