C/C++ Programming Help Thread

[Moonchild]

does anyone now a good tut for making games on a windows PC

someone??

Why did you post this in a PSP C/C++ thread? If I were you I'd go to a C/C++ game programming forum and ask there.

[Grimfate126]

i need help. i tried a new lib, and it screwed up my makefile. now im trying to revert back to my original lib. and im there except for one thing. when i complie, it gives this error:

/tmp/pspdev/pspsdk/src/gum/pspgum.c:463: undefined reference to 'cosf'
/tmp/pspdev/pspsdk/src/gum/pspgum.c:463: undefined reference to 'sinf'

this is weird cause its referring to the ACTUAL library. and ive been using it for all this time with no errors. heres my makefile:

TARGET = aso
OBJS = main.o 

CFLAGS = -O2 -G0 -Wall
CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
ASFLAGS = $(CFLAGS)

PSPBIN = $(PSPSDK)/../bin
LIBS += -lm -lc -lpsputility -lpspdebug -lpspgu -lpspgum -lmad -lpspaudiolib -lpspaudio -lpspdisplay -lpspctrl -lpspsdk -lpspvfpu -lpsplibc -lpspuser -lpspkernel -lpsprtc -lpsppower -lstdc++


EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE =Test

PSPSDK=$(shell psp-config --pspsdk-path)
include $(PSPSDK)/lib/build.mak

HELP!

[Moonchild]

Did you include <math.h>?

[yaustar]

Looks more of a linker problem with the libs.

Shouldn't "LIBS +=" in the makefile be "LIBS =" ?

[Grimfate126]

Did you include <math.h>?

i did.

[SG57]

head_54us - I think you can do LIBS+= if you already have LIBS declared (stated or w/e) with LIBS =, than again, I know nothing of makefiles compared to others.

And ya, you might wnat to check your ordering, its improtant. Try putting -lm in the middle, if that doesnt work, try the end, etc.

[Grimfate126]

head_54us - I think you can do LIBS+= if you already have LIBS declared (stated or w/e) with LIBS =, than again, I know nothing of makefiles compared to others.

And ya, you might wnat to check your ordering, its improtant. Try putting -lm in the middle, if that doesnt work, try the end, etc.

taht worked! i put it after pspgum, and it worked! thx!!

[yaustar]

head_54us - I think you can do LIBS+= if you already have LIBS declared (stated or w/e) with LIBS =, than again, I know nothing of makefiles compared to others.

So you can: http://www.netbsd.org/Documentation/.../makefile.html
Whoops.

[Moonchild]

head_54us - I think you can do LIBS+= if you already have LIBS declared (stated or w/e) with LIBS =, than again, I know nothing of makefiles compared to others.

And ya, you might wnat to check your ordering, its improtant. Try putting -lm in the middle, if that doesnt work, try the end, etc.

I always keep -lm and -lc at the end.

[Lukeson]

Transparent Text and Images

Hi,
is there a way to specify an alpha-value for displaying text and/or images?

Thanks in advance
Luke

[hallo007]

i am porting my calculator to psp and started with the menu

#include <math.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspdisplay.h>
#include <pspctrl.h>
#include <math.h>
PSP_MODULE_INFO("Hello World", 250, 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);
          sceKernelRegisterExitCallback(cbid);

          sceKernelSleepThreadCB();

          return 0;
}

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

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

          return thid;
}


double sqrt (double x);

void vermenigvuldigen ();
void optellen  ();
void aftrekken () ;
void delen ();
void kwadrateren ();
void vierkantswortel ();
void credits ();

void sluiten();



int main (void) 
{
pspDebugScreenInit();
SetupCallbacks();

    
printf( " ______   _______   _        ______      \n");  
printf( "|  ____| |  ___  | | |      |  ____|  \n");
printf( "| |      |  | |  | | |      | |      \n");
printf( "| |____  |  ---  | | |____  | |____ \n");
printf( "|______| |__| |__| |______| |______| v0.04 Beta \n");
    int input;
     
   printf("1. Vermenigvuldig\n");
    printf("2. delen\n");
    printf("3. optellen\n");
    printf("4. aftrekken\n");
    printf("5. kwadrateren\n");
    printf("6. Vierkantswortel\n");
    printf("7. Credits , historie en To-Do\n");
    printf("8. sluiten\n");
    
    printf("selecteer:", input);
    
    switch (input) {
           case 1:
               system("cls"); 
            
           
                
           case 2 : 
           system("cls");          
           
           case 3 :
            system("cls");    
            
           case 4 :
              system("cls"); 
                
           case 5 :
           system("cls"); 
                
         case 6 :
          system("cls");
                 
          case 7 :
          system("cls");
              
                     
           case 8 :
          system("cls"); 
                
                break;     
           default:
                system("cls");    
                printf("error , slechte selectie , probeer opnieuw\n");
                main();
sceKernelSleepThread();
return 0;

}   
}

and i get this error

$ make
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o main.o mai
n.c
main.c: In function 'main':
main.c:77: warning: too many arguments for format
main.c:81: warning: implicit declaration of function 'system'
main.c:77: warning: 'input' is used uninitialized in this function
main.c:116: warning: control reaches end of non-void function
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall  -L. -L/usr/local/
pspdev/psp/sdk/lib   main.o -lpspgu -lpng -lz -lm -lpspdebug -lpspdisplay -lpspg
e -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver
 -lpsputility -lpspuser -lpspkernel -o cpu
psp-fixup-imports cpu
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall  -L. -L/usr/local/
pspdev/psp/sdk/lib   main.o -lpspgu -lpng -lz -lm -lpspdebug -lpspdisplay -lpspg
e -lpspctrl -lpspsdk -lc -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver
 -lpsputility -lpspuser -lpspkernel -o tester.elf
psp-fixup-imports tester.elf
mksfo 'Image Example' PARAM.SFO
psp-strip cpu tester.elf -o cpu tester_strip.elf
Usage: psp-strip <option(s)> in-file(s)
 Removes symbols and sections from files
 The options are:
  -I --input-target=<bfdname>      Assume input file is in format <bfdname>
  -O --output-target=<bfdname>     Create an output file in format <bfdname>
  -F --target=<bfdname>            Set both input and output format to <bfdname>

  -p --preserve-dates              Copy modified/access timestamps to the output

  -R --remove-section=<name>       Remove section <name> from the output
  -s --strip-all                   Remove all symbol and relocation information
  -g -S -d --strip-debug           Remove all debugging symbols & sections
     --strip-unneeded              Remove all symbols not needed by relocations
     --only-keep-debug             Strip everything but the debug information
  -N --strip-symbol=<name>         Do not copy symbol <name>
  -K --keep-symbol=<name>          Only copy symbol <name>
  -w --wildcard                    Permit wildcard in symbol comparison
  -x --discard-all                 Remove all non-global symbols
  -X --discard-locals              Remove any compiler-generated symbols
  -v --verbose                     List all object files modified
  -V --version                     Display this program's version number
  -h --help                        Display this output
     --info                        List object formats & architectures supported

  -o <file>                        Place stripped output into <file>
psp-strip: supported targets: elf32-littlemips elf32-bigmips elf64-bigmips elf64
-littlemips elf64-little elf64-big elf32-little elf32-big srec symbolsrec tekhex
 binary ihex
make: *** [EBOOT.PBP] Error 1

[yaustar]

Not related to your problem but using "cls" command in the system function is pretty much DOS specific and should not be used at all.

[Lukeson]

Sorry for the doublepost, but I think that old post won't be found by anyone

Transparent Text and Images

Hi,
is there a way to specify an alpha-value for displaying text and/or images?

Thanks in advance
Luke

[Moonchild]

Well, I use this to set the alpha value of images:

void SetAlphaImage(Image * image, unsigned int alpha)
{
	int size;
	Color *databuf;

	if(!image->data)
		return;
		
	if(alpha>255) alpha = 255;
	if(alpha<0) alpha = 0;

	size = image->textureWidth * image->textureHeight;
	databuf = image->data;

	for(i = 0; i <= size; i++)
	{
		*databuf = (*databuf & 0x00ffffff) | ((A(*databuf)-(A(*databuf)-alpha))<<24);
		databuf++;
	}
}

[hallo007]

#include <math.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspdisplay.h>
#include <pspctrl.h>
#include <math.h>
PSP_MODULE_INFO("Hello World", 250, 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);
          sceKernelRegisterExitCallback(cbid);

          sceKernelSleepThreadCB();

          return 0;
}

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

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

          return thid;
}


double sqrt (double x);

void vermenigvuldigen ();
void optellen  ();
void aftrekken () ;
void delen ();
void kwadrateren ();
void vierkantswortel ();
void credits ();

void sluiten();



int main (void) 
{
pspDebugScreenInit();
SetupCallbacks();

    
printf( " ______   _______   _        ______      \n");  
printf( "|  ____| |  ___  | | |      |  ____|  \n");
printf( "| |      |  | |  | | |      | |      \n");
printf( "| |____  |  ---  | | |____  | |____ \n");
printf( "|______| |__| |__| |______| |______| v0.04 Beta \n");
    int input;
     
   printf("1. Vermenigvuldig\n");
    printf("2. delen\n");
    printf("3. optellen\n");
    printf("4. aftrekken\n");
    printf("5. kwadrateren\n");
    printf("6. Vierkantswortel\n");
    printf("7. Credits , historie en To-Do\n");
    printf("8. sluiten\n");
    
    printf("selecteer:", input);
    
    switch (input) {
           case 1:
           printf("test");          
                
           case 2 : 
           printf("test");         
           
           case 3 :
           printf("test");  
            
           case 4 :
          printf("test"); 
                
           case 5 :
          printf("test"); 
                
         case 6 :
         printf("test");
                 
          case 7 :
         printf("test");
              
                     
           case 8 :
         printf("test"); 
                
                break;     
           default:
                printf("test\n");   
                printf("error , slechte selectie , probeer opnieuw\n");
                main();
sceKernelSleepThread();
return 0;

}   
}

no errors , but when i start it on psp it's shows the text for 1/10 sec and then i get black screen
when i want to go back to xmb my psp crashes, why?
-= Double Post =-
and where can i found a sample keyboard in c/c++ , i only found them in LUA

[Waterbottle]

I have this code:

int *CarPointerPos = (int*) 0x08b5e114;
short *CurCarCol;
char *CurCarType;

*CurCarCol = (short*) CarPointerPos+0x1f0;
*CurCarType = (char*) CarPointerPos+0x58;
                     if(*CurCarCol == 0x746F && *CurCarType == 133) {
                                   //some code
                                   }

and get these warnings,
main.c:126: warning: assignment makes integer from pointer without a cast
main.c:127: warning: assignment makes integer from pointer without a cast
main.c:128: warning: comparison is always false due to limited range of data type
main.c:126: warning: 'CurCarCol' is used uninitialized in this function
main.c:127: warning: 'CurCarType' is used uninitialized in this function

what am I doing wrong? :/

[hallo007]

int curcartype;
int curcarcol;

i think
-= Double Post =-
but normal warnings arent problems , you can make the eboot perfectly
but mayby when in game it will give some bugs

[Waterbottle]

int curcartype;
int curcarcol;

i think
-= Double Post =-
but normal warnings arent problems , you can make the eboot perfectly
but mayby when in game it will give some bugs

if I remove the * it won't be a pointer any more And they are supposed to be a short and a char, that's what they are in memory.
and the warning 'main.c:128: warning: comparison is always false due to limited range of data type' I think means that the if statement never returns true so the code inside it will never be ran..

and it's a prx btw.

[hallo007]

o prx , i know nothing about that;)
-= Double Post =-
where can i find a exemple for a keyboard?
-= Double Post =-
but did you try it like this

int *CarPointerPos = (int*) 0x08b5e114;
short *CurCarCol;
char *CurCarType;

int *CurCarCol = (short*) CarPointerPos+0x1f0;
int *CurCarType = (char*) CarPointerPos+0x58;
if(*CurCarCol == 0x746F && *CurCarType == 133) {
//some code
}



then are it still pointers

[yaustar]

I suggest going back and read up on pointers since from that code, you don't fully understand the use of *.

I can't even tell what you are trying to do. Are you trying to point to a specific memory address? Or are you trying to pass actual values? Are the hex values (0xXXXXX) represent values or memory addresses?

[Frenchb0ygenius]

Ok, so im a complete n00b to c++ programming, and I just installed visual c++ express edition. I made a new source file, which is a simple hello world program. I was trying to add the iostream header file to the header folder, and when I compile it, it tells me that there is no such thing as this header file.

[Waterbottle]

I suggest going back and read up on pointers since from that code, you don't fully understand the use of *.

I can't even tell what you are trying to do. Are you trying to point to a specific memory address? Or are you trying to pass actual values?

I'll try and explain what I'm trying to do.

first I want to get the value of the memory address 0x08b5e114

so I do

int *CarPointerPos = (int*) 0x08b5e114;

then 0x08b5e114 is a pointer (so the value it contains is another memory address).

and I want edit 2 memory addresses according to what 0x08b5e114 is.
so if forexample 0x08b5e114 stores the value 0x08e41210 then I would want to read the value of 0x08e41200 and 0x08e41268.

Hope that's understandable (I'm not very good at explaining :/ ).
Any help would be appriciated.

[yaustar]

// If 0x08b5e114 is a memory address then this is all you need to do.
int *CarPointerPos = 0x08b5e114;

// Always NULL pointers if they are not given a value on creation
// This saves ALOT of trouble during debugging
short *CurCarCol = NULL;
char *CurCarType = NULL;

// I have no clue what the hell you are trying to do from this point on.
/*  
 What is 0x1F0? What is 0x58? A value? A memory address? 
 Are you trying to jump memory addresses?
 Why are you trying to jump memory addresses? 
 What is so special about the value/memory address of 0x1f0 or 0x58? 
 How many bits/bytes do you want to jump? 
 Do you understand pointer arithmetic?
*/
*CurCarCol = (short*) CarPointerPos+0x1f0;
*CurCarType = (char*) CarPointerPos+0x58;
if(*CurCarCol == 0x746F && *CurCarType == 133) 
{
	//some code
}

skfhaklsfhaklsfhsafashfls af
-= Double Post =-

Ok, so im a complete n00b to c++ programming, and I just installed visual c++ express edition. I made a new source file, which is a simple hello world program. I was trying to add the iostream header file to the header folder, and when I compile it, it tells me that there is no such thing as this header file.

Did you install the compiler? http://msdn.microsoft.com/vstudio/ex...alc/usingpsdk/

If you just want to get an easy to use IDE and compiler, I recommend DevCpp

[Waterbottle]

// If 0x08b5e114 is a memory address then this is all you need to do.
int *CarPointerPos = 0x08b5e114;

// Always NULL pointers if they are not given a value on creation
// This saves ALOT of trouble during debugging
short *CurCarCol = NULL;
char *CurCarType = NULL;

// I have no clue what the hell you are trying to do from this point on.
/*  
 What is 0x1F0? What is 0x58? A value? A memory address? 
 Are you trying to jump memory addresses?
 Why are you trying to jump memory addresses? 
 What is so special about the value/memory address of 0x1f0 or 0x58? 
 How many bits/bytes do you want to jump? 
 Do you understand pointer arithmetic?
*/
*CurCarCol = (short*) CarPointerPos+0x1f0;
*CurCarType = (char*) CarPointerPos+0x58;
if(*CurCarCol == 0x746F && *CurCarType == 133) 
{
	//some code
}

skfhaklsfhaklsfhsafashfls af

ok, I'm trying to create a simple custom mission for gta.
the value that CarPointerPos gets points to the start of the memory for the car you are in.
and I want to read some info about the car which is located in memory at CarPointerPos+0x1f0 and CarPointerPos+0x58. so 0x58 and 0x1f0 are how far into the car memory the info is located. so I want to read from the memory address the value of CarPointerPos is +0x58.

[SG57]

FrenchOyenious - iostream is the standard in/out library for windows, meaning the psptoolchain shouldnt have it in there unless it was ported (?)

hallo007 - Making a PRX has nothing to do with whether or not his pointer's are being un-initalized, or anything on that matter...

[Waterbottle]

I'll try and make my question simlper. (disregard the code I posted)

I first make CarPointerPos point to 0x08b5e114 so I can read it's value.
int *CarPointerPos = (int*) 0x08b5e114;

Now the int that is stored in 0x08b5e114 is a memory address. How could I get a pointer to point to the memory address that value of 0x08b5e114 is?

here's an example picture of what the memory might look like.


there you can see that 0x08b5e114 = 0x0998B580 (reversed order of the hex).

so then I want the second pointer to point to the memory address 0x0998B580. How would I do that?

I don't think I'll be able to explain it any better than this. hoping for an answer.

[Grimfate126]

i need help. how can i save a image in C?? (like screen:save in lua) i know the function, but it wont work since im using the GU/GUM. any other way?

[Raphael]

I'll try and make my question simlper. (disregard the code I posted)

I first make CarPointerPos point to 0x08b5e114 so I can read it's value.
int *CarPointerPos = (int*) 0x08b5e114;

Now the int that is stored in 0x08b5e114 is a memory address. How could I get a pointer to point to the memory address that value of 0x08b5e114 is?

int *CarPointer = (int*)((int)*CarPointerPo s);

should work (inner cast probably is unneccesary).

Also, regarding something like
*CurCarCol = (short*) CarPointerPos+0x1f0;
*CurCarType = (char*) CarPointerPos+0x58;
Read up on pointer arithmetic unless you already know, since (short*)x + 1 != (char*)x + 1.

[Twin891]

Grimfate I used the saveImage(); function in graphics.h it works great for my pong game. Im not sure how it will turn out when you are using GU.

[Grimfate126]

Grimfate I used the saveImage(); function in graphics.h it works great for my pong game. Im not sure how it will turn out when you are using GU.

tahts why it wont work. :)