C/C++ Programming Help Thread

[Moca]

wait so in C you cannot define where text goes like LUA???

you have to skip lines??

pspDebugScreenSetXY(x, y);

[joseph10444]

pspDebugScreenSetXY(x, y);

so is it like this?? (do they have to be in capitals)

"
pspDebugScreenSetXY (126,110);
printf ("Hi guys.");
"

then its set to 126 110

[Moca]

so is it like this?? (do they have to be in capitals)

"
pspDebugScreenSetXY (126,110);
printf ("Hi guys.");
"

then its set to 126 110

Yeah. If you are constantly changing the x,y values to custom ones each time you call printf, I'd make a function to do that >_>

int pspDebugScreenPrintfXY(int x, int y, char* string, ...);

Of course you would need to learn about variable arguments, but would make things easier if you needed a function similar to the one above

And to answer your second question.
Variables, function names, types, etc... are all case sensitive so case does matter. If everything is declared in all caps, then use it as it was declared.

Anyway, your code looks fine.

[SG57]

I believe the debug console uses a character place x and y value, not pixel x and y values (so (4,10) will move over 4 characters spots and down 10 (from the top left))

[joseph10444]

oh...
now thats kinda CHEAP!!!
..

but thats another problem Moca
in my code...
OH LOL NVM..
i seemed to have forgot the ";" at the end of my SetXY
..

[joseph10444]

how can you set text on colour?
im sorry im so new to this...
i have to read more tutorials on calling functions

[Sullivan]

I am a new learning developer, but I think its like this:

pspDebugScreenPrint (X, Y, Text, Color);

Just try popping in some hex values for a color, try that.

[Archaemic]

No, wrong, false.

pspDebugScreenSetTextColor(u32 color)

[Sullivan]

No, wrong, false.

pspDebugScreenSetTextColor(u32 color)

So it couldn't be all in one line with the coordinates at all? Sorry, I am really new.

[joseph10444]

wow i have to put in a lot of these pspDebugScreenSetxxxxxxxx xxxx

do i replace u32 or colour?

[Archaemic]

Both. The u32 just signifies that what you're putting in there is of type u32--that is, unsigned 32-bit integer.

[joseph10444]

can i replace colour with any colour lke blue

[Archaemic]

You need the hexcode for the color. You can't just put in "blue".

[Sullivan]

So like this:

pspDebugScreenSetTextColor(u32 FFFFFF)

[Archaemic]

So like this:

pspDebugScreenSetTextColor(0xFFFFFF)

Fixed.

(This is the hexcode for pure white, by the way)

[Sullivan]

Ok, cool, thanks man, even though I didn't need this, I know now for the future.

[MiKeY188]

in c++ i use

#define blue 0x0000ff

pspDebugScreenSetTextColo r(blue);
printf("Helloworld");

prints helloworld in blue text color! But in C it may be different.

[Moose]

Nope, C would be the same.

[MiKeY188]

also i dont know why the r is taken a space when i edit it it doesn't appear like that ( pspDebugScreenSetTextColo ur(Blue); )

-=Double Post=-

Ok cool

[Moose]

The space appears to prevent exploits, which exploits I'm not sure.

Also, when you post any code, place it in the [CODE] tags, please. :)

[MiKeY188]

Ok will do

[Predricted]

Hey all,
Can someone explain me how I make a scrolling map in C.
I've made a map like this:
int main() {
Image* texture1Img;
Image* texture2Img;
Image* tree1Img;
Image* wall1Img;

pspDebugScreenInit();
SetupCallbacks();
initGraphics();

texture1Img = loadImage("texture1.png") ;
texture2Img = loadImage("texture2.png") ;
tree1Img = loadImage("tree1.png");
wall1Img = loadImage("wall1.png");

int x = 0;
int y = 0;
sceDisplayWaitVblankStart ();
while (x < 2000) {
while (y < 2000) {
blitAlphaImageToScreen(0 ,0 ,32 , 32, texture1Img, x, y);
y += 32;
}
x += 32;
y = 0;
}
blitAlphaImageToScreen(0 ,0 ,32 , 32, tree1Img, 50, 50);
flipScreen();
}


Thats all now I've drawn an texture as a background from 2000 x and 2000 y.
All I want now is that it must scroll when playerx and playery gets at some kind of distance from the screen 480, 272.
I think I must make a 2 variables that got the value of the screen height and width, then when player gets at 400 or 200 the screen moves.
But I don't really know how to do that in C, can someone explain me? I would really apreciate that!

[coolguy5678]

Have two variables that keeps track of what point in the world the top-left corner of the screen represents. Move that around when the player is near the edge of the screen. Then subtract these co-ordinates from the co-ordinates of the object you're drawing to get the position on the screen where you have to draw it.

[Predricted]

Have two variables that keeps track of what point in the world the top-left corner of the screen represents. Move that around when the player is near the edge of the screen. Then subtract these co-ordinates from the co-ordinates of the object you're drawing to get the position on the screen where you have to draw it.

So you mean:
top-left corner is at begin x=0 y=0
screenx=0
screeny=0
when player=screenx+480-100
screenx=screenx+playerxsp eed

okay lets say now
screenx=200
screeny=0

This is till where I understand it..
You say subtract these coördinates from the object your drawing to get the position on the screen where you have to draw it.
I don't understand that, the problem is not that I don't know where to draw the (player-)object.
I don't know how to move the screen to another position, the (player-)object got already the right position.
Or do you mean something else with object.

[thecobra]

maybe you can try something like this
-----------------------------------------------------------------code--------------
screenx = 0 //screen x
screeny = 0 //and y

playerx =0 //player x
playery =0 //player y

mapW = 512 //map width
mapH = 512 //map hight

blitAlphaImageToScreen(0 ,0 ,480, 272, mapImg, screenx,screeny); //blit the map from screen x and screen y
blitAlphaImageToScreen(0 ,0 ,32, 32, playerImg, playerx,playery);//blit player

if (player x>480) {
playerx = 0; //reset the player x like what Zelda does
screenx = screenx + 480; //move screenx in map to the left
if (screenx > mapW) {
screenx = mapW; //make sure that screen x does not pass the map wight if so the set it to map wight
}
}
...
---------------------------------------------------------------------end of code-----
so on and so on
do you understand now?
:)

[joseph10444]

how can i find Hex values of colours??
all i know is RGB-ing lol

[Insert_Witty_Name]

The PSP takes colour values in 0xAABBGGRR format.

Which you can create using the GU_RGBA macro.

unsigned int color = GU_RGBA(255, 255, 255, 255);

Is white, fuly opaque (0xFFFFFFFF).

0xFF0000FF is red.

0xFF00FF00 is green.

0xFFFF0000 is blue.

255 is 0xFF in hex.

Google is good for decimal to hex convertors.

[joseph10444]

okay ty..
not really understood it but okay ill have to search google

[joseph10444]

okay so this is my code

 pspDebugScreenSetXY(4,13);
printf("hello");

pspDebugScreenSetTextColor(green);
pspDebugScreenSetXY(6,15);
printf("hello hello");

pspDebugScreenSetXY(4,17);
printf("hello hello hello");

so the "hello" would appear in white

then the "hello hello" would appear in green because it was defined earlier

but i want the "hello hello hello" to appear back in white...

do i have to set the colour to white all over again??

[yaustar]

okay ty..
not really understood it but okay ill have to search google

Read up on the HEX number system: http://www.danbbs.dk/~erikoest/hex.htm