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didtent think of that lol good pointbut im not shure what to start with? any ideas on something easy but cool :P lol becuse i thought pool would be easy but i was wrongZitat:
Zitat von TacticalPenguin
-= Double Post =-
ok ive got an idea what if i made a driveing game for the background say i had a track or something but how would i make it so if the car goes off track you lost per say?
How would I use the analog stick to move? I've tried looking at other examples, but I couldn't figure it out.
Ok, i just got done with my first lua thing ever, but it wont work......
*cries*
Could somebody take a look at the script for me and see whats wrong?
Its attached.
Edit: nvm, heres the code:
And the 7 extra kb is the picture that it loads, which is 480x272 in resolution and is named background.jpgCode:blue = Color.new(0, 0, 255)
screen:print(0, 0, "Loading: 30%", blue)
screen.flip()
screen.waitVblankStart(120)
screen:clear
screen:print(0, 0, "Loading: 70%", blue)
screen.flip()
screen.waitVblankStart(120)
screen:clear
screen:print(0,0, "Loading Complete", blue)
screen.flip
screen.waitVblankStart(120)
screen:clear
background = Image.load("background.jpg")
screen:print(0, 0, "Tux says hello!", blue)
screen.flip()
screen.waitVblankStart(240)
screen:clear
background = Image.load("background.jpg")
screen:print(0, 0, "Tux says goodbye!", blue)
screen.flip()
screen.waitVblankStart(180)
while true do
screen.waitVblankStart()
end
thats what i have so far not much it works on the computer but not on my psp :S andi dont know how to set bounderies so it cant just drive off the track. and i need to create an ecceleration button insted of just useing the d-pad. and a brake button but for now i need to know hoto do too things bounderies and make it work on my psp???
Code:track = Image.load("track.png")
car = Image.load("car.png")
screenwidth = 480 - player:width()
screenheight = 272 - player:width()
car = { }
car[1] = { x = 200, y = 50 }
while true do
pad = Controls.read()
screen:clear()
for a = 0, 14 do
for b = 0,8 do
screen:blit(0,0,track)
end
end
screen:blit(car[1].x,car[1].y,car)
if pad:left() and car[1].x > 0 then
Player[1].x = car[1].x - 2
end
if pad:right() and car[1].x < screenwidth then
car[1].x = car[1].x + 2
end
if pad:up() and car[1].y > 0 then
car[1].y = car[1].y - 2
end
if pad:down() and car[1].y < screenheight then
car[1].y = car[1].y + 2
end
screen.waitVblankStart()
screen.flip()
end
It's pretty nice because since it returns an integer, you don't have to do an if statement (in the simplest case, at least).Zitat:
Zitat von ARza
You'll have to mess with the signs a bit to get it right, but that takes care of movement in almost all directions.Code:player.x=player.x+math.floor(pad:analogX()/32)
player.y=player.y-math.floor(pad:analogY()/32)
@ Tactical Penguin and iamcanadian:
Post errors.
Post error? I can see my post fine......
post error?? whats that and how do i fix it
Zitat:
Zitat von TacticalPenguin
ROFL!!! :ROFL: :ROFL: he means, post what error you get when you run the script.
-= Double Post =-
same as above.Zitat:
Zitat von iamcanadian
Oh, ok. It says:
Error: index.lua :6: function arguments expected near 'scree'
Press start to restart
oh haha i feel dumb now :( lol
heres the error:
Error: DRIVEING.LUA:4: Image.load Error loading image. lmao i think i can fix it now :P i read it before but i dident read the whole thing now i feel dumber :P
I wonder if your image load portion needs fixed! Anyways, anyone ko whats wrong with my script?
Zitat:
Zitat von TacticalPenguin
you write screen clear like this:
it SHOULD be:Code:screen:clear
Code:screen:clear()
OH I FORGOT THE LITTLE PARENTHESES THINGIES!!!!!!!!!!!!!!!!! !!!!!!
Do I also need to do that on screen.flip?
Yep.Zitat:
Zitat von TacticalPenguin
It's nice that these problems are working themselves out. :) The error descriptions are quite good, aren't they?
lol now i feel more dumb i cant fix my image problem and it works fine on my computer so im confused
-= Double Post =-
never mind i figured it out
Ok, it shows the text up to where it should display the background pic then it shows this:
Error: index.lua:14: Image.load: Error loading image.
Press start to restart
My code now is:
The pic is named background.jpg and is in the same directory as index.luaCode:blue = Color.new(0, 0, 255)
screen:print(0, 0, "Loading: 30%", blue)
screen.flip()
screen.waitVblankStart(120)
screen:clear()
screen:print(0, 0, "Loading: 70%", blue)
screen.flip()
screen.waitVblankStart(120)
screen:clear()
screen:print(0,0, "Loading Complete", blue)
screen.flip()
screen.waitVblankStart(120)
screen:clear()
background = Image.load("background.jpg")
screen:print(0, 0, "Tux says hello!", blue)
screen.flip()
screen.waitVblankStart(240)
screen:clear()
background = Image.load("background.jpg")
screen:print(0, 0, "Tux says goodbye!", blue)
screen.flip()
screen.waitVblankStart(180)
while true do
screen.waitVblankStart()
end
ok i have 2 new problems now
1. how do i make the car move faster and smoother (if you need to look at my code its in the last page
2.how do i make a button to return to the lua player
how can i do this:
if timerD > 120 and < 140 then characterL = Run_L[7] end
where "and" is writin i dont know what to put to do:
if timer D is > then 120 but < then 140
My part of code:
Code:if timerL == 140 then timerL = 0 end
if timerL >= 120 < 140 then characterL = Run_L[7] end
if timerL >= 100 < 120 then characterL = Run_L[6] end
if timerL >= 80 < 100 then characterL = Run_L[5] end
if timerL >= 60 < 80 then characterL = Run_L[4] end
if timerL >= 40 < 60 then characterL = Run_L[3] end
if timerL >= 20 < 40 then characterL = Run_L[2] end
if timerL >= 0 < 20 then characterL = Run_L[1] end
ZeroX, you must do:
But for all of them...Code:if timerL >= 0 and timerL < 20 then characterL = Run_L[1] end
Tkz SG57 tomorow when im done jumping and shooting and maybe a part of the level collision il send you a demo.TKZ i whas to tired to find it out TKZ
@ Tactical Penguin
I never use jpegs, always pngs, and I've never had a problem. How big in pixels is background.jpg? Make sure the capitalization and spelling is correct. Also, you load it twice, which you obviously don't need to do.
@ iamcanadian
1. These kinds of problems are ones where you have to do trial and error, because there's hardly ever just one way to do things. Faster is easy, just make it move more pixels per loop. However, it generally makes the movement seem less smooth when you make it faster.
2. When the interpreter reaches the end of the code, it goes back to luaplayer. So all you have to do is "break" out of the main loop.
@ ZereoX
It is far more efficient to use elseif's when you are testing the same variable, because it only runs through the if statements until it finds a satisfied condition.
SG57 posted the easiest way since I started, so I'll post another way, which is probably less efficient time-wise, but it does condense the two conditions into one (I suppose that makes it more efficient space-wise):
and to use elseif's:Code:if math.abs(timerL-9.5) < 10 then characterL = Run_L[1] end
Code:if math.abs(timerL-9.5) < 10 then
characterL = Run_L[1]
elseif math.abs(timerL-29.5) < 10 then
characterL = Run_L[2]
end
Ok guys, I got mine all fixed! Thanks for the help!
ok i got the break code to work but my whole script is slow for some reason
My works perfect thanks guys.
PS.Im participating in the Dream coding compo sponsor by DCemu also Zion's compo sponsor by him hope you vote for me when im done.
Cheers,ZereoX
I did try that, but I keep getting some error that has nothing to do with those two lines. I put this in:Zitat:
Zitat von LMelior
But I get some stupid error. Could somone maybe post a working example?Code:mx=mx+math.floor(pad:analogX()/32)
my=my+math.floor(pad:analogY()/32)
This is from one of my projects; you should be able to tell what it does and why I did it this way. It works for me and it's not that different from what you posted, so I don't know what's wrong with your code.Zitat:
Zitat von ARza
Code:-- Allow player to change map offset with analog
if pad:analogX()<0 then
mapoffset.x=mapoffset.x-math.floor(pad:analogX()^2/2500)
elseif pad:analogX()>0 then
mapoffset.x=mapoffset.x+math.floor(pad:analogX()^2/2500)
end
if pad:analogY()<0 then
mapoffset.y=mapoffset.y-math.floor(pad:analogY()^2/2500)
elseif pad:analogY()>0 then
mapoffset.y=mapoffset.y+math.floor(pad:analogY()^2/2500)
end
Zitat:
Zitat von LMelior
sry for the n00bish question, but what DOES math.floor do??
Surely a pro in 2D Lua would know to check the Lua Reference Manual. ;) I'll give you a hint, you don't need a separate rounding function because math.floor(x + 0.5) does the exact same thing.
Zitat:
Zitat von LMelior
i got burned... so let me guess, it removes the decimal off of any number?
and the reference is just too boring for me. sad how i know metatables, but not this..:Cry:
Yeah. It rounds down (or, returns the largest integer <= a specific number), and is antonymous with math.ceiling.Zitat:
it removes the decimal off of any number?
I usually don't check for things I don't know exist, either. It's just too bad you had to learn something so important on the streets.
i get it! floor - down, ceiling - up! corny, but it works!Zitat:
Zitat von Aphonia
-= Double Post =-
Zitat:
Zitat von ARza
here is some code that *should* work. havent tested it, but it should.
Code:sentivity = 32 -- the higher you put this, the slower it will move--
mx = mx + (pad:analogX()/sentivity)
my = my + (pad:analogX()/sentivity)
hello i have 3 questions:
1. i found this timer on evilmana.com site:
its really good BUT...its TOO FAST! ... its moving maybe 50-100 numbers/second...Code:white = Color.new(255,255,255)
counter = Timer.new()
counter:start()
while true do
screen:clear()
currentTime = counter:time()
screen:print(10,10,"Counter Time: " .. currentTime,white)
if currentTime < 1000 then
screen:print(100,100,"Less than 1000",white)
end
if currentTime > 1000 and currentTime < 2000 then
screen:print(100,100,"Greater than 1000",white)
end
if currentTime > 2000 then
counter:reset(0)
counter:start()
end
screen.waitVblankStart()
screen.flip()
end
so HOW do i set it to 1 number in 1 sec???
2. Question:
this is simple code for info...i want it so when i press X it throw me back in Main Menu...it works but only sometimes...normally a i have to tap the button and then it randomly close and im back in menu...sometimes i pres X once...sometimes 20 times... i dont know whats the problem :/Code:--biela
white = Color.new(255,255,255)
while true do
screen:clear()
pad = Controls.read()
screen:print(190,100,"Autor: myschoo",white)
screen:print(110,110,"Podakovanie: QJ forum a EvilMana.com",white)
screen:print(140,120,"Stlac X pre navrat do menu",white)
if pad:cross() then
break
end
screen.waitVblankStart()
screen.flip()
end
3. question is similar to 1st question:
when i use this code i can hear only maybe 0.5 sec from music then it plays from start..again and again and again...how to STOP this???Code:Music.playFile("music.xm", true)
THX 4 answers!
1. The timer is in milliseconds which is why it seems so fast. If you want seconds then simply divide it by 1000.
(You may want to floor it to get a whole number)Code:currentTimeInSecs = currentTime / 1000
2. You need to store the state of the button in the previous frame so you can tell the difference between a button press and a when you hold down the button.
head_54us:
thx mate 1st. thing sorted...i will try the second one
edit. sorted :)
so my last question again:
"Music.playFile("music.xm ", true)"
when i use this code, i dont know what to add so the music plays correctly... :(
Well atleast someone sorted your problem out :D
yeeh well good thread!! :D
im just trying to ad collisions what am i doing wrong here?Code:System.usbDiskModeActivate()
line = Image.load("line.png")
player = Image.load("player.png")
linee = Image.load("line1.png")
--Colisions
function collisionCheck(object)
if (Player.x + playerWidth > object.x) and (Player.x < object.x + object.width) and (Player.y + playerHeight > object.y) and (Player.y < object.y + object.height) then
Player.x = oldx
Player.y = oldy
end
end
screenwidth = 480 - player:width()
screenheight = 272 - player:width()
Player = { }
Player[1] = { x = 10, y = 75 }
playerHeight = 60
playerWidth = 66
oldx = Player.x
oldy = Player.y
line = { }
line[1] = { x = 0, y = 150 }
while true do
pad = Controls.read()
screen:clear()
screen:blit(0,50,linee)
screen:blit(0,150,line)
--check collision for line
collisionCheck(line[1])
screen:blit(Player[1].x,Player[1].y,player)
if pad:left() and Player[1].x > 0 then
Player[1].x = Player[1].x - 4
end
if pad:right() and Player[1].x < screenwidth then
Player[1].x = Player[1].x + 4
end
if pad:up() and Player[1].y > 0 then
Player[1].y = Player[1].y - 4
end
if pad:down() and Player[1].y < screenheight then
Player[1].y = Player[1].y + 4
end
if pad:start() then break end
screen.waitVblankStart()
screen.flip()
end
whats your error?Zitat:
Zitat von iamcanadian
bad argument #2 'blit' (image expected, got table) but that dosent make sence beacuse it never had problems eith any blit's intill i added the collision script???
its because you created a table named line after you had already created line for an image.
Change the name of one of the two.