C/C++ Programming Help Thread

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Zitat von SG57

TMNT - I had a 18000x272 image for my 'world'. I divided it into 39 parts and rendered via

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for(int x=0; x<NUM_WORLD_PARTS;x++) {
    screen:blit(x*512,0,World[x]);
}

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Ok, rather than having 5 different images, i really think that i shoud just have one big one. I still can't find how to work your code. I tried this:

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for (int x=0; x<4.75;x++) {
    blitAlphaImageToScreen(0, 0, 480, 222, Background, x*512, 0);
}

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After using that, i got an error:

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error: 'for' loop initial declaration used outside C99 mode

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Also, i found out that loading an image bigger than 512 x 512 is ok unless you try to blit an image bigger than that. However, when i take part of the image with this code, my psp freezes:

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blitAlphaImageToScreen(0, 0, 480, 222, Background, 0, 0);

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There, i am only blitting part of an image bigger than 512 x 512, so why is it freezing? Also, since this isn't working, and i can't figure out how to cut image (even using your code), how would i cut an image using code?

You can't create a variable in a for command in C99. Only in C++.

So is there any way i can divide my image into parts using code (C, not C++)? That is the main problem i am having. I am still eagerly trying to find a strategy to load my huge background and allow it to scroll. Any suggestions?

Just change,

Code:

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for(int x=0; x<NUM_WORLD_PARTS;x++) {
    screen:blit(x*512,0,World[x]);
}

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to

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int x;
for(x=0; x<NUM_WORLD_PARTS;x++) {
    screen:blit(x*512,0,World[x]);
}

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....
-= Double Post =-
Oh my lord, did you even look at "TileSys.c" and "TileSys.h" I showed a while back? You only need to change a few lines and it would be perfect...

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Zitat von PSPJunkie_

Just change,

Code:

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for(int x=0; x<NUM_WORLD_PARTS;x++) {
    screen:blit(x*512,0,World[x]);
}

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to

Code:

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int x;
for(x=0; x<NUM_WORLD_PARTS;x++) {
    screen:blit(x*512,0,World[x]);
}

---

....
-= Double Post =-
Oh my lord, did you even look at "TileSys.c" and "TileSys.h" I showed a while back? You only need to change a few lines and it would be perfect...

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Could you please please show me again?

Edit: It compiles without errors, but i still get the horizontal bluriness....:Argh:

You do realize that the system is set to render images 16x16. It does need some editing. I would never just give you code. If you are referring to it being blurry when you move, tough luck. That's what you get for using "graphics.c".

TMNT use the oslib WAY better than graphics

google: old school lib for psp or something like that

note: this should be used when u understand some of the more basic programming principals

slice - I think he should first get the hang of using good ol' graphics.c library before moving onto something more advanced such as Oslib.

agreed

don't know what i was thinking

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Zitat von SG57

slice - I think he should first get the hang of using good ol' graphics.c library before moving onto something more advanced such as Oslib.

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Agreed as well. I saw the Oslib....way too compicated. Also, by blurry, i mean simple blitting. I don't know what i should do then for my background. I could just make one of those type of 2d games when you move right of screen, you go onto another image...so everytime you move right or left, different background (maybe same level). I could do that at first, and work on my character movement, then AI, and other features. Then i should use OSlib. Also, does OSlib support bigger images than graphics.c, and what are the differences? Thanks.

Umm, no. You should make your own loader and blitter.
-= Double Post =-
Super, go online please.

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Zitat von PSPJunkie_

Super, go online please.

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Huh? Already online...J/k. Btw, if no one knows what i am working on:

http://superbatxs.biaklan.com/level1.png

Hopefully, that should be obvious.

Online, as in AIM.

Sorry, i only have msn now. :(
I just logged on on msn.

sorry nope never seen it also how do i return the current psp time and the psp's username?

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Zitat von slicer4ever

how do i return the current psp time

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http://rafb.net/p/3Pq52839.html

Make sure you include -lpsprtc in makefile

thanks tmnt

I need help about something. I am using c++ and i am trying to create my first psp program using a tutorial on psp-programming.com. I am currently on that page: http://www.psp-programming.com/tutor...lesson02-3.htm , more precisely at "And that's it for the program! Now we just have to tell the compiler how we want this project compiled by creating a Makefile. So create a new file called "Makefile" with no extention (ie, no .txt). Once you've done this, open it up in your text editor" and that is where i'm stuck. What is a makefile and how do i create it? Please help me.

a makefile is a file named makefile without any extension just when saving go to save as any type and don't add an extension

also a makefile tells the compiler how to build your program(what libs to add, any images,etc,etc

It can have an extension, you just need to tell the compiler what it is. Say you make file is "Makefile.psp".

In cygwin you would type,

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make -f Makefile.psp

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also how do i call a multi-arrayed string?

like if i use pspDebugScreenPrintf("%s" ,stirng(multi ...how?)

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Zitat von slicer4ever

a makefile is a file named makefile without any extension just when saving go to save as any type and don't add an extension

also a makefile tells the compiler how to build your program(what libs to add, any images,etc,etc

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I just don't understand. Ive got all the following stuff in my c++ project:



/* This program was created by Jonathan on 2007-05-11
It is a simple "Hello World" Application
*/

#include <pspkernel.h>
#include <pspdebug.h>

PSP_MODULE_INFO("Hello World", 0, 1, 1):

#define printf pspDebugScreenPrintf

/* Exit callback */
int exit_callback(int arg1, int arg2, void *common) {
sceKernelExitGame();
return 0;
}

/* Callback thread */
int CallbackThread(SceSize args, void *argp) {
int cbid;

cbid = sceKernelCreateCallback(" Exit Callback", exit_callback, NULL);
sceKernelRegisterExitCall back(cbid);

sceKernelSleepThreadCB();

return 0;
}

/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void) {
int thid = 0;

thid = sceKernelCreateThread("up date_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
if(thid >= 0) {
sceKernelStartThread(thid , 0, 0);
}

return thid;
}

int main() {

pspDebugScreenInit();
SetupCallbacks();

printf("Hello World");

sceKernelSleepThread();

return 0; }


Exactly like it says on the tutorial of psp-programming. Where must i write what i have to write to create that "makefile" and how do i write it? Or if it is done by another procedure, what is it? It is my first time on c++ and i know very little, sorry!

u need to make an entirely new file named makefile

the makefile is what is read by the compiler first

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Zitat von slicer4ever

u need to make an entirely new file named makefile

the makefile is what is read by the compiler first

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Ok and how do i create it? Is it done on Windows by right-clicking on yourmouse and select the option that create a new folder, or is it done on c++ by another procedure?

open up notepad and save it as makefile then write all the info the tut tells u to write into the makefile
-= Double Post =-
also still need an answer on how to call a multi-arrayed string

Code:

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#include <stdio.h>

int main ()
{
   
        char string[3][30] = { "I", "am", "PSPJunkie" };
       
        printf("%s ", string[0]);
        printf("%s ", string[1]);
        printf("%s", string[2]);
       
    return 0;
}

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This will print "I am PSPJunkie".

o i see i tried it the other way around:

int string[30][3]={"I", "am", "slicer4ever"};
..etc

i kept getting
warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[100]'

thanks junkie
-= Double Post =-
um... i see what i did wrong i kept adding it to the wrong string

Well first off, you used an integer instead of an array of characters... @[email protected]

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Zitat von PSPJunkie_

Well first off, you used an integer instead of an array of characters... @[email protected]

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Haha :)

is there a documentation of how to use the dual boot with the modchip?

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Zitat von hallo007

is there a documentation of how to use the dual boot with the modchip?

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I dunno exactly what do you mean, but here's something about accessing PSP NAND when running from U.P flash.: http://forums.maxconsole.net/showpos...14&postcount=8

that was what I needed;) , Thanx:)
-= Double Post =-
if you call pspDebugScreenClear in a thread , will it clean the screen in another thread too?

if YES
how to you delete the text of one therad without touching the text of another thread

anyone know know where i can learn more on how to use the psp's ir functions

/usr/local/pspdev/psp/sdk/samples/ir/
and
/usr/local/pspdev/psp/sdk/include/pspsircs.h

i did but they only go so far also not to much of a description of how it is used so i was looking for a better tut on how to use the ir commands

The sdk has great documentation. You should be able to work it out with those two references.

Guys, I got a question that it a little hard for me to word, but I'll try.

If I try to make a program that gives you a list of the images on your memory stick, how would i give it a code so that it will display the .png? (I mean, no matter what the name of the png, it will load. [ I know how to load images to the screen, this is a little different ] ).

Kinda like loading a random image, how would I do that? (If I can at all)

You worded it fine.

You need to get a list of the file names in a directory, parse these names for files that end in .png and then pick one.

Check out dirent.h, and Google for opendir, readdir, closedir etc. for how to use the functions.

I used this exact same method to get a random song from the PSP/MUSIC directory in 48 Hour Pong.

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Zitat von Insert_Witty_Name

You worded it fine.

You need to get a list of the file names in a directory, parse these names for files that end in .png and then pick one.

Check out dirent.h, and Google for opendir, readdir, closedir etc. for how to use the functions.

I used this exact same method to get a random song from the PSP/MUSIC directory in 48 Hour Pong.

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Ok. Thank you.

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Zitat von hallo007

if you call pspDebugScreenClear in a thread , will it clean the screen in another thread too?

if YES
how to you delete the text of one therad without touching the text of another thread

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The screen is the screen. If you clear it, it's cleared and stays so until you change it again. The screen doesn't care for threads or multiple processors working with it. If you consult your brain, it will give you the same answer.