C/C++ Programming Help Thread

[GmDude66]

Ok, I need some help.

I have been trying to compile this remote example that I found, but I keep getting a parse error:




Below I will post the code:

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

PSP_MODULE_INFO("Remote Code Display", 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();

u32 remoteButtons;

printf("Please Press The Pause Key");

while(1) {

sceHprmPeekCurrentKey(&re moteButtons);

if(remoteButtons & PSP_HPRM_PLAYPAUSE){
break;
}
}

printf("Pause Key Pressed");


sceKernelSleepThread();

return 0;
}

Can anyone help me?

[Waterbottle]

How about acos?

thanks, that's what I wanted.

However I thought I knew how I would do what I wanted. but then i realised that was no where near close to working

Basically what I want is:
I Have the X and Y position of the player. and I have the X and Y position of a mummy. And I want the mummy to be rotated so that it's always looking towards the player.
As I said I tried do figure out how to do it with cos, sin and tan. But I just can't figure out how to do it (I'll be the first to admit that cosine etc isn't my strongest point though). I just want to get the amount of degrees it should be rotated. Anyone got any tips on how to do it?

[minsin]

Sorry for hijacking but I was wondering fi there was any way to install the toolchain on a mac and sucessfully compile a file?

[SG57]

xart actually made a small 'compilable' envirorment out of Xcode for TIFF games...

[SENTINEL5000]

Um.. a small question here. How come something that is capable of running in 333MHz can't emulate another thing that only needs about 7 MHz for playing and about 4 Mhz for sound??

[LMelior]

thanks, that's what I wanted.

However I thought I knew how I would do what I wanted. but then i realised that was no where near close to working

Basically what I want is:
I Have the X and Y position of the player. and I have the X and Y position of a mummy. And I want the mummy to be rotated so that it's always looking towards the player.
As I said I tried do figure out how to do it with cos, sin and tan. But I just can't figure out how to do it (I'll be the first to admit that cosine etc isn't my strongest point though). I just want to get the amount of degrees it should be rotated. Anyone got any tips on how to do it?

That would be arctangent. I'm pleasantly surprised that C has the MATLAB function "atan2" (although I shouldn't have been, since it's really the other way around) which is exactly what you need. The regular atan only accepts one argument, y/x, but since it can't distinguish if and when the variables are negative or not, it will only return an angle in the correct quadrant about half of the time. atan2 accepts 2 arguments, atan2(y,x), and uses the signs to determine the correct quadrant.

Sorry for the long-winded explanation, I was just excited. :ROFL:

[SG57]

SETINEL - Link?

[Waterbottle]

That would be arctangent. I'm pleasantly surprised that C has the MATLAB function "atan2" (although I shouldn't have been, since it's really the other way around) which is exactly what you need. The regular atan only accepts one argument, y/x, but since it can't distinguish if and when the variables are negative or not, it will only return an angle in the correct quadrant about half of the time. atan2 accepts 2 arguments, atan2(y,x), and uses the signs to determine the correct quadrant.

Sorry for the long-winded explanation, I was just excited. :ROFL:

thanks.

but when I try to compile I get the error:

/usr/local/pspdev/lib/gcc/psp/4.0.2/../../../../psp/lib/libm.a(w_atan2.o): In fu
nction `atan2':
../../../../../newlib/libm/math/w_atan2.c:110: undefined reference to `__errno'
../../../../../newlib/libm/math/w_atan2.c:107: undefined reference to `__errno'
collect2: ld returned 1 exit status

I took a look in 'w_atan2.c' and it seems like errno is a variable that hasn't been defined. Should I just define it? (if I should what should it be defined as? double?).

[Access_Denied]

Ok, I need some help.

I have been trying to compile this remote example that I found, but I keep getting a parse error:




Below I will post the code:



Can anyone help me?

You know you can copy and paste code from the bash shell right?
1. Right click on the top of the bash shell window
2. Go down to Edit -> Mark
3. Select you Text
4. Press Enter

Congradulations, you just copied text

[cloudpjff7]

Yesterday I was trying to set up my psp dev environment, after learning a bit of C++ of course. So when I type in "./toolchain.sh" I get a message something like "make sure you have gnu make installed". What should I do, is there like a packaged cygin pack with all the right files you need. If not how can I install gnu make.
Thx!

[Insert_Witty_Name]

Yesterday I was trying to set up my psp dev environment, after learning a bit of C++ of course. So when I type in "./toolchain.sh" I get a message something like "make sure you have gnu make installed". What should I do, is there like a packaged cygin pack with all the right files you need. If not how can I install gnu make.
Thx!

You need to install all of the 'devel' category in cygwin.

Run the setup.exe again and select to install all the 'devel' category.

(You don't actually need all of the 'devel' category, but you need most so you might as well select them all)

See my tutorial here if you need a walkthrough: http://insomniac.0x89.org/index.php?id=56

[Waterbottle]

That would be arctangent. I'm pleasantly surprised that C has the MATLAB function "atan2" (although I shouldn't have been, since it's really the other way around) which is exactly what you need. The regular atan only accepts one argument, y/x, but since it can't distinguish if and when the variables are negative or not, it will only return an angle in the correct quadrant about half of the time. atan2 accepts 2 arguments, atan2(y,x), and uses the signs to determine the correct quadrant.

Sorry for the long-winded explanation, I was just excited. :ROFL:

thanks.

but when I try to compile I get the error:

/usr/local/pspdev/lib/gcc/psp/4.0.2/../../../../psp/lib/libm.a(w_atan2.o): In fu
nction `atan2':
../../../../../newlib/libm/math/w_atan2.c:110: undefined reference to `__errno'
../../../../../newlib/libm/math/w_atan2.c:107: undefined reference to `__errno'
collect2: ld returned 1 exit status

I took a look in 'w_atan2.c' and it seems like errno is a variable that hasn't been defined. Should I just define it? (if I should what should it be defined as? double?).

looking a bit further I also found errno.c (in C:\cygwin\home\MyName\psp toolchain\newlib-1.13.0\newlib-1.13.0\newlib\libc\errno)

The errno variable is stored in the reentrancy structure. This
function returns its address for use by the macro errno defined in
errno.h.

I tried just adding an include for errno.h, but that didn't help any.
Anyone know how to include errno so it gets defined?

[Moonchild]

Just for the record, the undefined reference is __errno, not errno.
I think it might have something to do with the std though. You could try to change it to c99.

[Waterbottle]

Just for the record, the undefined reference is __errno, not errno.
I think it might have something to do with the std though. You could try to change it to c99.

hmm, how should I do that?

[Moonchild]

In the makefile, add -std=c99 to the CFLAGS.

[Waterbottle]

In the makefile, add -std=c99 to the CFLAGS.

didn't help :/

Does it make a difference that it's a prx?

[hallo007]

some problems
when i press the Up or down button it doesnt do anything(it dont do x++ or x--)
(i want that x only one goes up by press or holding the up button)

$ make kxploit
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o main.o mai
n.c
main.c: In function 'vermenigvuldigen':
main.c:48: warning: initialization makes integer from pointer without a cast
main.c:49: warning: initialization makes integer from pointer without a cast
main.c:53: warning: comparison between pointer and integer
main.c:58: warning: assignment makes integer from pointer without a cast
main.c:61: warning: assignment makes integer from pointer without a cast
main.c:65: warning: comparison between pointer and integer
main.c:69: warning: assignment makes integer from pointer without a cast
main.c:72: warning: assignment makes integer from pointer without a cast
main.c:94: warning: implicit declaration of function 'menu'
main.c: At top level:
main.c:106: warning: conflicting types for 'menu'
main.c:94: warning: 'menu' declared inline after being called
main.c:94: warning: previous implicit declaration of 'menu' was here

de source

#include <math.h>//rekenmachine
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspctrl.h>//controls


#define printf pspDebugScreenPrintf
PSP_MODULE_INFO("calculator",0,0,1);
/* 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;
}

int y = 0;
int x =0;

SceCtrlData pad;
inline void vermenigvuldigen()
{

printf("Druk op pijltje naar boven/beneden om de waarde van het eerste getal te veranderen :%i\n",x);
printf("Druk op pijltje naar links/rechts om de waarde van het tweede getal te veranderen :%i\n",y);
char upPressed = "false"; // This initializes "upPressed" //
char downPressed = "false";
while(1) {
         sceCtrlReadBufferPositive(&pad, 1);//start controls
         if(pad.Buttons & PSP_CTRL_UP) {
                      if (upPressed == "false") { 
                        x++;
                        pspDebugScreenClear();
                        vermenigvuldigen(); 
                        }
                       upPressed = "true";
                       }
                       else {
                       upPressed = "false";
                       }
           
        if(pad.Buttons & PSP_CTRL_DOWN) {
                      if (downPressed == "false") { 
                        x--;
                        pspDebugScreenClear();
                        vermenigvuldigen(); 
                        downPressed = "true";
                       }
                       else {
                       downPressed = "false";
                       }
                       }
 

         if(pad.Buttons & PSP_CTRL_RIGHT) {
                        y++;
                                               
                        pspDebugScreenClear();
                        printf("Druk op pijltje naar boven/beneden om de waarde van het tweede getal te veranderen :%i\n",y);                   
                                
                        } 
                   if(pad.Buttons & PSP_CTRL_LEFT) {
                        y--;
                                               
                        pspDebugScreenClear();
                        printf("Druk op pijltje naar boven/beneden om de waarde van het tweede getal te veranderen :%i\n",y);                    
                                
                        } 
                  if(pad.Buttons & PSP_CTRL_CROSS) {
                        pspDebugScreenClear();
                        printf("het product is: %i\n",x*y); 
                        menu();                
                        }            
                 if(pad.Buttons & PSP_CTRL_TRIANGLE) {
                 printf(" deze functie is nog niet af");        
                    vermenigvuldigen(); 
                    } 
              
      
}
}  

inline void menu()
{ 

       
       printf( "   ______   _______   _        ______     \n");  
       printf(  "  |  ____| |  ___  | | |      |  ____|      v0.01 Beta test   \n");
       printf(  "  | |      |  | |  | | |      | |               by roel      \n");
       printf(  "  | |____  |  ---  | | |____  | |____         (HALLO007)\n");
       printf(  "  |______| |__| |__| |______| |______|  -=[RP]=- Productions  \n\n\n");
       printf("welkom bij de beta release van calculator als je van bewerking wilt veranderen moet je driehoekje induwen\n\n\n");
vermenigvuldigen();       
}



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

[Grimfate126]

some problems
when i press the Up or down button it doesnt do anything(it dont do x++ or x--)
(i want that x only one goes up by press or holding the up button)

$ make kxploit
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall   -c -o main.o mai
n.c
main.c: In function 'vermenigvuldigen':
main.c:48: warning: initialization makes integer from pointer without a cast
main.c:49: warning: initialization makes integer from pointer without a cast
main.c:53: warning: comparison between pointer and integer
main.c:58: warning: assignment makes integer from pointer without a cast
main.c:61: warning: assignment makes integer from pointer without a cast
main.c:65: warning: comparison between pointer and integer
main.c:69: warning: assignment makes integer from pointer without a cast
main.c:72: warning: assignment makes integer from pointer without a cast
main.c:94: warning: implicit declaration of function 'menu'
main.c: At top level:
main.c:106: warning: conflicting types for 'menu'
main.c:94: warning: 'menu' declared inline after being called
main.c:94: warning: previous implicit declaration of 'menu' was here

de source

#include <math.h>//rekenmachine
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspctrl.h>//controls


#define printf pspDebugScreenPrintf
PSP_MODULE_INFO("calculator",0,0,1);
/* 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;
}

int y = 0;
int x =0;

SceCtrlData pad;
inline void vermenigvuldigen()
{

printf("Druk op pijltje naar boven/beneden om de waarde van het eerste getal te veranderen :%i\n",x);
printf("Druk op pijltje naar links/rechts om de waarde van het tweede getal te veranderen :%i\n",y);
char upPressed = "false"; // This initializes "upPressed" //
char downPressed = "false";
while(1) {
         sceCtrlReadBufferPositive(&pad, 1);//start controls
         if(pad.Buttons & PSP_CTRL_UP) {
                      if (upPressed == "false") { 
                        x++;
                        pspDebugScreenClear();
                        vermenigvuldigen(); 
                        }
                       upPressed = "true";
                       }
                       else {
                       upPressed = "false";
                       }
           
        if(pad.Buttons & PSP_CTRL_DOWN) {
                      if (downPressed == "false") { 
                        x--;
                        pspDebugScreenClear();
                        vermenigvuldigen(); 
                        downPressed = "true";
                       }
                       else {
                       downPressed = "false";
                       }
                       }
 

         if(pad.Buttons & PSP_CTRL_RIGHT) {
                        y++;
                                               
                        pspDebugScreenClear();
                        printf("Druk op pijltje naar boven/beneden om de waarde van het tweede getal te veranderen :%i\n",y);                   
                                
                        } 
                   if(pad.Buttons & PSP_CTRL_LEFT) {
                        y--;
                                               
                        pspDebugScreenClear();
                        printf("Druk op pijltje naar boven/beneden om de waarde van het tweede getal te veranderen :%i\n",y);                    
                                
                        } 
                  if(pad.Buttons & PSP_CTRL_CROSS) {
                        pspDebugScreenClear();
                        printf("het product is: %i\n",x*y); 
                        menu();                
                        }            
                 if(pad.Buttons & PSP_CTRL_TRIANGLE) {
                 printf(" deze functie is nog niet af");        
                    vermenigvuldigen(); 
                    } 
              
      
}
}  

inline void menu()
{ 

       
       printf( "   ______   _______   _        ______     \n");  
       printf(  "  |  ____| |  ___  | | |      |  ____|      v0.01 Beta test   \n");
       printf(  "  | |      |  | |  | | |      | |               by roel      \n");
       printf(  "  | |____  |  ---  | | |____  | |____         (HALLO007)\n");
       printf(  "  |______| |__| |__| |______| |______|  -=[RP]=- Productions  \n\n\n");
       printf("welkom bij de beta release van calculator als je van bewerking wilt veranderen moet je driehoekje induwen\n\n\n");
vermenigvuldigen();       
}



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

#include <math.h>//rekenmachine
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspctrl.h>//controls


#define printf pspDebugScreenPrintf
PSP_MODULE_INFO("calculator",0,0,1);
/* 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;
}

int y = 0;
int x =0;

char upPressed = "false"; // This initializes "upPressed" //
char downPressed = "false";

SceCtrlData pad;
inline void vermenigvuldigen()
{

printf("Druk op pijltje naar boven/beneden om de waarde van het eerste getal te veranderen :%i\n",x);
printf("Druk op pijltje naar links/rechts om de waarde van het tweede getal te veranderen :%i\n",y);

         sceCtrlReadBufferPositive(&pad, 1);//start controls
         if(pad.Buttons & PSP_CTRL_UP) {
                      if (upPressed == "false") { 
                        pspDebugScreenClear();
                        x++;
                        }
                       upPressed = "true";
                       }
                       else {
                       upPressed = "false";
                       }
           
        if(pad.Buttons & PSP_CTRL_DOWN) {
                      if (downPressed == "false") { 
                        pspDebugScreenClear();
	          x--;
                        downPressed = "true";
                       }
                       else {
                       downPressed = "false";
                       }
                       }
 

         if(pad.Buttons & PSP_CTRL_RIGHT) {
                        y++;
                                               
                        pspDebugScreenClear();
                        printf("Druk op pijltje naar boven/beneden om de waarde van het tweede getal te veranderen :%i\n",y);                   
                                
                        } 
                   if(pad.Buttons & PSP_CTRL_LEFT) {
                        y--;
                                               
                        pspDebugScreenClear();
                        printf("Druk op pijltje naar boven/beneden om de waarde van het tweede getal te veranderen :%i\n",y);                    
                                
                        } 
                  if(pad.Buttons & PSP_CTRL_CROSS) {
                        pspDebugScreenClear();
                        printf("het product is: %i\n",x*y); 
                        menu();                
                        }            
                 if(pad.Buttons & PSP_CTRL_TRIANGLE) {
                 printf(" deze functie is nog niet af");        
                    vermenigvuldigen(); 
                    } 
              
}  

inline void menu()
{ 

       
       printf( "   ______   _______   _        ______     \n");  
       printf(  "  |  ____| |  ___  | | |      |  ____|      v0.01 Beta test   \n");
       printf(  "  | |      |  | |  | | |      | |               by roel      \n");
       printf(  "  | |____  |  ---  | | |____  | |____         (HALLO007)\n");
       printf(  "  |______| |__| |__| |______| |______|  -=[RP]=- Productions  \n\n\n");
       printf("welkom bij de beta release van calculator als je van bewerking wilt veranderen moet je driehoekje induwen\n\n\n");
vermenigvuldigen();       
}



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

while (1) {
menu();
flipScreen();
sceDisplayWaitVblankStart();
}
     
}

try that. couple of errors in your original code:

1. use a main loop in your main function. (easier as well as faster)
2. youre not flipping anything...
3.why are you calling the function everytime you press a button??? once is enough.

[cloudpjff7]

You need to install all of the 'devel' category in cygwin.

Run the setup.exe again and select to install all the 'devel' category.

(You don't actually need all of the 'devel' category, but you need most so you might as well select them all)

See my tutorial here if you need a walkthrough: http://insomniac.0x89.org/index.php?id=56

Thanks man seems to be working installing toolchain as we speak!!! :Jump:

Damn This is taking forever to install toolchain

[LMelior]

I tried just adding an include for errno.h, but that didn't help any.
Anyone know how to include errno so it gets defined?

Sorry, I'm not very good at C but I would like to know if you get it worked out. To show my noobness, errno sounds like some error checking, so I would just try to comment it out. :)

But actually you could always try a workaround...see if just plain old "atan" compiles okay. If it does, you could check for the correct quadrant yourself, e.g. if x is negative then angle = angle + 180 degrees. Or however you are supposed to fix the angle (I don't remember offhand).

[Fanjita]

hallo007: your problem is that you're using 'char' for upPressed and downPressed, and then assigning the address of a string literal ("false") to it. You should be getting lots of compiler warnings about that, and it's always best to try to investigate those to avoid this sort of problem.

To make what you're trying to do work, use 'char*' for those variables instead, which would work.

But what you're doing is somewhat strange. Better yet, is to make these variables truly boolean, since that's what you really want to do. There is no boolean type in C, so you'd need to use int, e.g.:

#define TRUE 1
#define FALSE 0

int upPressed = FALSE;

...

        if(pad.Buttons & PSP_CTRL_UP) {
                      if (!upPressed) { 
                        x++;
                        pspDebugScreenClear();
                        vermenigvuldigen(); 
                        }
                       upPressed = TRUE;
                       }
                       else {
                       upPressed = FALSE;
                       }

...

[hallo007]

dam it's still doing x+1,2,3,4,5,6,.... when you hold the up button

inline void vermenigvuldigen()
{
int upPressed = FALSE; // This initializes "upPressed" //
int downPressed = FALSE;
printf("Druk op pijltje naar boven/beneden om de waarde van het eerste getal te veranderen :%i\n",x);
printf("Druk op pijltje naar links/rechts om de waarde van het tweede getal te veranderen :%i\n",y);
while(1) {
sceCtrlReadBufferPositive (&pad, 1);//start controls
if(pad.Buttons & PSP_CTRL_UP) {
if (!upPressed) {
x++;
pspDebugScreenClear();
vermenigvuldigen();
}
upPressed = TRUE;
}
else {
upPressed = FALSE;
}


if(pad.Buttons & PSP_CTRL_DOWN) {
if (!downPressed) {
x--;
pspDebugScreenClear();
vermenigvuldigen();
}
downPressed = TRUE;
}
else {
downPressed = FALSE;
}




if(pad.Buttons & PSP_CTRL_RIGHT) {
y++;

pspDebugScreenClear();
vermenigvuldigen();

}
if(pad.Buttons & PSP_CTRL_LEFT) {
y--;

pspDebugScreenClear();
vermenigvuldigen();

}
if(pad.Buttons & PSP_CTRL_CROSS) {
pspDebugScreenClear();
printf("het product is: %i\n",x*y);
menu();
}
if(pad.Buttons & PSP_CTRL_TRIANGLE) {
printf(" deze functie is nog niet af");
vermenigvuldigen();
}

}
}

the compille warnings

main.c: In function 'vermenigvuldigen':
main.c:100: warning: implicit declaration of function 'menu'
main.c: At top level:
main.c:112: warning: conflicting types for 'menu'
main.c:100: warning: 'menu' declared inline after being called
main.c:100: warning: previous implicit declaration of 'menu' was here

[Moonchild]

Pretty sure this would work:

 inline void vermenigvuldigen()
{
int upPressed = FALSE; // This initializes "upPressed" //
int downPressed = FALSE;
printf("Druk op pijltje naar boven/beneden om de waarde van het eerste getal te veranderen :%i\n",x);
printf("Druk op pijltje naar links/rechts om de waarde van het tweede getal te veranderen :%i\n",y);
while(1) {
sceCtrlReadBufferPositive (&pad, 1);//start controls
if(pad.Buttons & PSP_CTRL_UP) {
if (!upPressed) {
x++;
pspDebugScreenClear();
vermenigvuldigen();
upPressed = TRUE;
}
}
else {
upPressed = FALSE;
}


if(pad.Buttons & PSP_CTRL_DOWN) {
if (!downPressed) {
x--;
pspDebugScreenClear();
vermenigvuldigen();
downPressed = TRUE;
}
}
else {
downPressed = FALSE;
}




if(pad.Buttons & PSP_CTRL_RIGHT) {
y++;

pspDebugScreenClear();
vermenigvuldigen();

}
if(pad.Buttons & PSP_CTRL_LEFT) {
y--;

pspDebugScreenClear();
vermenigvuldigen();

}
if(pad.Buttons & PSP_CTRL_CROSS) {
pspDebugScreenClear();
printf("het product is: %i\n",x*y);
menu();
}
if(pad.Buttons & PSP_CTRL_TRIANGLE) {
printf(" deze functie is nog niet af");
vermenigvuldigen();
}

}
}

EDIT: Just tested it, worked fine.

[Waterbottle]

Sorry, I'm not very good at C but I would like to know if you get it worked out. To show my noobness, errno sounds like some error checking, so I would just try to comment it out. :)

But actually you could always try a workaround...see if just plain old "atan" compiles okay. If it does, you could check for the correct quadrant yourself, e.g. if x is negative then angle = angle + 180 degrees. Or however you are supposed to fix the angle (I don't remember offhand).

got it to work using atan instead of atan2,
mummyrot = atan(((mummyy-*pposy)/(mummyx-*pposx))*-1);
if(mummyx-*pposx<0) mummyrot += 180.0f*(3.1415/180);

thanks for all the help :)

[hallo007]

thnx homer;)

[cloudpjff7]

yes......got my pspdev environment all set up. Well now I am having trouble with including, I don't know what to include its a little different for coding for a pc or mac. I am learning C++ do you reccomend me switching to C or am I good. Any help or tutorials on that kind of stuff:Cry: :Cry:

[SG57]

A few extra includes are necessary, as well as some restrictions to what is able to be included... All basic general libraries are there (math, std*) but anything like MP3 playing, OGG playing , SDL_*, etc. requires you to install them from the svn. (svn co svn://svn.ps2dev.org/psp/trunk/__________).

[LMelior]

got it to work using atan instead of atan2,
mummyrot = atan(((mummyy-*pposy)/(mummyx-*pposx))*-1);
if(mummyx-*pposx<0) mummyrot += 180.0f*(3.1415/180);

thanks for all the help :)

Ah, so my memory serves me correctly! Excellent! Just wondering...not that it matters, but did you notice that you multiply pi by 180 and then divide by 180? Strange that you had to multiply by -1 in atan, too. Oh well, I'm glad it works. :)

[Cheater]

Is there an easy way to get the icon/background of a homebrew game (What you see on the xmb)? Is there a function in C that can accomplish this?

P.S. I just realized that it is possible (irshell does it), but now I need to find out how to do it in c.

[SG57]

Yes. You can extract all of it from either the % folder eboot, or a 'true' 1.0 BEOOT. Not qite sure how, may just want to test my taking a small blan eboot, add an image to it, open the image up in a hex editor and find its start and last hex, search through the eboot for hte start hex, mark it, search for hte end hex, mark it. Now you should be able to copy and paste all in between into a text document and rename it to .png and have it still work meaning you can do the same on the PSP...

P.S. I actually havent any evidecne or proof that works, just an idea I had, so if it doesnt work, sorry.