C/C++ Programming Help Thread

Zitat:

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Zitat von hibbyware

I've still not had any problems with hidden folders.

The only problems I had was for files which I managed to sort out by using sceIoChstat.

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Thanks freeplay... I mean, hibbyware

hey so does anyone have a sample code for getting a variable from a text file off the internet, like get a string from blackbelttcon.com/test.txt

I need some help, I have a float

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float CustardScroll = 2.50;

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but when I try and display it with the code:

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printf("Custard Scrolls cost: %f", CustardScroll);

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Instead of it saying "Custard Scrolls cost: 2.50" it says "Custard Scrolls cost: 2.50000"

Anybody know why :confused:

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Zitat von BigSanFrey

I need some help, I have a float but when I try and display it with the code: Instead of it saying "Custard Scrolls cost: 2.50" it says "Custard Scrolls cost: 2.50000"

Anybody know why :confused:

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You haven't set the precision to be printed.
http://www.cplusplus.com/reference/c...io/printf.html

I want to draw a rectangle on the screen with an alpha layer... umm can't think of any examples, I was just wondering where to look for the GU functions as its been a while since I used any, and if there were any basic tutorials or source codes out there showing that idea, all I've really seen was the ones on PSP-Programming which didn't really interest me and so I didn't do much work with them.

Thanks.
-Aura

Code:

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void pgeGfxDrawRect(float x, float y, float width, float height, unsigned int color)
{
        pgeGfxStartDrawing();

        pgeVertCV* vertices = (pgeVertCV*)sceGuGetMemory((sizeof(pgeVertCV)<<1));

        vertices[0].color = color;
        vertices[0].x = x;
        vertices[0].y = y;
        vertices[0].z = 0.0f;

        vertices[1].color = color;
        vertices[1].x = x + width;
        vertices[1].y = y + height;
        vertices[1].z = 0.0f;

        sceGuDisable(GU_TEXTURE_2D);
        sceGuShadeModel(GU_FLAT);
        sceGuDrawArray(GU_SPRITES, GU_COLOR_8888|GU_VERTEX_32BITF|GU_TRANSFORM_2D, 2, 0, vertices);
        sceGuShadeModel(GU_SMOOTH);
        sceGuEnable(GU_TEXTURE_2D);
}

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Easy enough to follow. pgeGfxStartDrawing() just checks to make sure the display list has been started.

What's the best way of determining whether someone is using the 1.5 kernel, or the 3.xx kernel?

Should I just use,

Code:

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if (sceKernelDevkitVersion() == 0x01050001)
{
// 1.5
}
else
{
//3.xx
}

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?
or is there some other way?

If you mean what has been set in recovery then you could check the config.se

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Zitat von Slasher

What's the best way of determining whether someone is using the 1.5 kernel, or the 3.xx kernel?

Should I just use,

Code:

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if (sceKernelDevkitVersion() == 0x01050001)
{
// 1.5
}
else
{
//3.xx
}

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?
or is there some other way?

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I think that that would just check the firmware version, not the kernel being used. Also, checking config.se wouldn't work, as that just sets the kernel for GAME folder homebrew, when something can still be run from GAME150 or GAME3XX.

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Zitat von Judas

I think that that would just check the firmware version, not the kernel being used. Also, checking config.se wouldn't work, as that just sets the kernel for GAME folder homebrew, when something can still be run from GAME150 or GAME3XX.

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Yeah but checking what the current working directory is and also checking what kernel the GAME folder is set to should tell you what kernel is running,

I'm sure there is a better way to check it but I'm sure it would work,

That would work, but would be a long way of doing so, I believe in one of the old OE/M33 firmwares contained a library in the SDK folder that had a function for checking the mode it was booted in, but I can't be sure.

I'm trying to get mp3s streaming... again... I got a hacky version earlier and somehow messed it up, I don't even know where I got the old code from that loaded the entire file into memory, but I want to learn to write my own music functions from scratch. I don't have much knowledge on the music front, but I assume streaming music requires 2 buffers, and for parts of a file to be read into each buffer, one of those buffers to be played while the other is read, but beyond that I don't know much, some heavily comment code or a guide or something would be highly apprechiated if anyone can point me in the right direction (I did look at this but it confused me :o

Thanks.
-Aura

Are there eboot compilers that you can use on the PSP that will compile c++ source files?

That could really help me out if there is something like that. :twisted: :confused:

maybe try uclinux

i just checked that out, would I have to use a secondary application within uclinux to compile? Or does uclinux have a set-up for packing?

thanks

not sure, never used it

Hmmm. I did a search off files.qj.net using keywords "pack" and others along those lines but it didn't turn up anything. I only found a pbp-pack on google, but that only packs on a computer the .sfo, .psp, and other assorted files after unpacking an eboot...

I'll search some more, but if anyone knows anything, the help would be appreciated ^ ^

Here's the deal, I really want to learn to code for the psp. In order to do so, I have ordered myself a book on basic C. Also I have read a fair amount of tutorials and lots of posts here and on ps2dev.
This already resulted in a working toolchain and my first "Hello World" app. Nothing big really, but you gotta start somewhere right ?

While I am awaiting my ordered book I'm trying to figure some simple stuff out, like button input. That's where my question comes in.
I'll post the my code, makefile and toolchain error. I've been searching my a** off on this issue, but can't figure it out yet. I hope someone here can help me out. (And yes I know, I will need to learn proper coding skills before starting on the psp, but I'm hoping I can combine the two).

My code:

Code:

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//This is a simple 'Hello World' type app.
//It will display text and can be exited with a button press
//This app is created by FRanatic on 01-03-2008

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

#define VERS 1
#define REVS 1
#define printf pspDebugScreenPrintf

PSP_MODULE_INFO("Hello World", 0, VERS, REVS);
PSP_HEAP_SIZE_MAX();

/* 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 main()
{
        pspDebugScreenInit();
        SetupCallbacks();
        sceCtrlData pad;
       
        printf("Hello FRanatic \n");
        printf("Hit O to continue...\n");
       
        while(1)
        {
        sceCtrlReadBufferPositive(&pad,1);
        if(pad.Buttons & PSP_CTRL_CIRCLE){
                break;}
        }       

        pspDebugScreenClear();
        printf("Press X to exit to the XMB\n");
       
        while(1)
        {
        sceCtrlReadBufferPositive(&pad, 1);
        if(pad.buttons & PSP_CTRL_CROSS){
                sceKernelExitGame();}
        }
       
        sceKernelSleepThread();
       
        return 0;
}

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My make file:

Code:

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TARGET = hello2
OBJS = main.o

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

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = Hello World 1.1

BUILD_PRX = 1
PSP_FW_VERSION = 371

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

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And the errors I get when running the makefile:

Code:

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main.c: In function 'main':
main.c:55: error: 'sceCtrlData' undeclared (first use in this function)
main.c:55: error: (Each undeclared identifier is reported only once
main.c:55: error: for each function it appears in.)
main.c:55: error: expected ';' before 'pad'
main.c:62: error: 'pad' undeclared (first use in this function)
make: *** [main.o] Error 1

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Thanks in advance.

I presume you have read this?

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Zitat von BigSanFrey

I presume you have read this?

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Yes, I did.
Did I implement it the wrong way ?

Try making it for 1.50 kernel first, then see if your code works on 3.XX kernel :)

AFAIK, I only need to adjust my makefile (deleting prx and version lines) and remove the heap_size_max line from the code.

However my first hello world, did work with that makefile and heap_size line.

I've got a long road ahead of me...But I'll get there someday !

@JoyforPSP - Go through your code and check that you have enough { and } in your code as to me it looks like your missing some of these } ,

Not sure if this still applies, but sceCtrlData is not actually a struct, its SceCtrlData for some odd reason which I've never understood, unlike all other sce functions this one requires a capital S instead of a low case s...

-Aura

your error is with

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sceCtrlData pad;

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it should be

Code:

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SceCtrlData pad;

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needed a captial S ;)
-= Double Post =-
lol, beat me to it Aura

lol I looked at the error message then forgot about that,

Ignore me saying your missing some of these { and } as you do have them but they are put in a wierd place so I never noticed them, lol

Thanks everybody for the replies.
I got it running now and works like it should.
Indeed it a capital 'S' was needed.

thanks to hotrocker, I am now able to compile some eboots with his help. So this morning, he compiled my game, but it came up with these errors that I don't understand:

http://i181.photobucket.com/albums/x...ard/errror.jpg

And some of the errors are for "for" loops, I can't seem to figure out why these errors have occurred, does anyone know what I should change?

Also let me know if you want me to post the "main.cpp."

Post up the code. Also, you are attempting to compile main.c not main.cpp. If you are using C++, then rename the file to main.cpp.

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Zitat von yaustar

Post up the code. Also, you are attempting to compile main.c not main.cpp. If you are using C++, then rename the file to main.cpp.

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Ok, I will tell hotrocker that, because I forgot to say that I was wanting c++ compiled...

Here is main.cpp:

Spoiler for code:

main.cpp #include <oslib/oslib.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include <time.h> extern "C" { #include "logo.h" } PSP_MODULE_INFO("Physics Game (by sg57)", 0, 1, 1); /* Define the main thread's attribute value (optional) */ PSP_MAIN_THREAD_ATTR(THRE AD_ATTR_USER | THREAD_ATTR_VFPU); const int NUM_ENEMIES = 10; const int dmg = 5; const int NUM_OF_OBS = 400; const float G = -0.32f; // gravity const int FORCE = 10; // the force given to the object when launched // change these consts to change the colors of the //projectiles const OSL_COLOR C1 = RGB(0,0,0); // 9 const OSL_COLOR C2 = RGB(0,0,230); // 53 OSL_SOUND *music, *punch, *ouch; OSL_IMAGE *player, *weapon, *weapon2; typedef struct physics { OSL_IMAGE *img; float x; float y; float vx; float vy; int angle; int speed; }; physics springobject; physics enemies[NUM_ENEMIES]; bool enemies_dead[NUM_ENEMIES]; int bgeffects; float spring, damping, tangent, dx, dy, healthtemp; int mx, my, yyy; float health, totalhealth; int score; bool paused; int XM, YM; float XW[NUM_OF_OBS], YW[NUM_OF_OBS], VY[NUM_OF_OBS], VX[NUM_OF_OBS]; float Angle; int DropNum, FireCount; float Water; void rdrawline (float x, float y, float x2, float y2, OSL_COLOR c) { oslDrawLine(int (x), int (y), int (x2), int (y2), c); } void oslDrawLine(int x-1, int y-1, int x-1, int y-1, OSL_COLOR color); void springphysics() { springobject.vx += (mx - springobject.x) * spring; springobject.vy += (my - springobject.y) * spring; springobject.vx *= damping; springobject.vy *= damping; springobject.x += springobject.vx; springobject.y += springobject.vy; } void respawn (int enemyid) { enemies_dead[enemyid] = false; enemies [enemyid].x = rand() % (480) + 1; //Rand.Int (1, maxx); enemies [enemyid].y = rand() % (272) + 1; //Rand.Int (1, maxy); enemies [enemyid].vx = 0; enemies [enemyid].vy = 0; enemies [enemyid].speed = rand() % 3 + 1; } void ai() { // if you can call it that for (int i = 0; i < NUM_ENEMIES; i++) { dx = mx - enemies[i].x; dy = my - enemies[i].y; if (!enemies_dead[i]) { if (dx == 0) { if (dy > 0) enemies[i].vy = enemies[i].speed; else enemies[i].vy = -enemies[i].speed; } else { // very simple trigonometry tangent = atan (dy / dx); enemies[i].vx = cosf (tangent) * enemies[i].speed; enemies[i].vy = sinf (tangent) * enemies[i].speed; } if (dx >= 0) { enemies[i].x += enemies[i].vx; enemies[i].y += enemies[i].vy; } else if (dx < 0) { enemies[i].x += -enemies[i].vx; enemies[i].y += -enemies[i].vy; } } else { if(enemies[i].x < -50 || enemies[i].x > 530 || enemies[i].y < -50 || enemies[i].y > 322) respawn (i); enemies[i].x += enemies[i].vx; enemies[i].y += enemies[i].vy; } } } float distance(float x1, float y1, float x2, float y2) { return ( sqrtf( pow( (x2-x1), 2) + pow( (y2-y1), 2) ) ); } void collisions() { // >.< for (int i = 0; i < NUM_ENEMIES; i++) { if (distance (enemies[i].x+2, enemies[i].y+2, mx+7, my+7) <= 10) { oslPlaySound(ouch, 2); health -= dmg; respawn (i); } if (distance (enemies[i].x+2, enemies[i].y+2, springobject.x+5, springobject.y+5) <= 7) { //respawn (i); oslPlaySound(punch, 1); enemies_dead[i] = true; enemies[i].vx = springobject.vx; enemies[i].vy = springobject.vy; score++; } } } void fire() { if (Angle > 360) Angle = 0; else if (Angle < 0) Angle = 360; XW [DropNum] = XM; YW [DropNum] = YM; VY [DropNum] = sinf (Angle) * FORCE; VX [DropNum] = cosf (Angle) * FORCE; FireCount = 0; if (DropNum < NUM_OF_OBS) DropNum = DropNum + 1; else DropNum = 1; } void LoadDefaults() { bgeffects = 1; Water = 1.0f; Angle = 0.0f; XM = 50; YM = 50; for (int W = 0; W < NUM_OF_OBS; W++) { XW [W] = -10; YW [W] = -10; VY [W] = 0; VX [W] = 0; } DropNum = 1; FireCount = 1; paused = true; score = 0; mx = 50; my = 50; springobject.x = 50; springobject.y = 50; springobject.vx = 0; springobject.vy = 0; yyy = -10; health = 500; totalhealth = 500; spring = 0.05f; // 0.05 damping = 0.911f; for (int i = 0; i < NUM_ENEMIES; i++) { enemies[i].x = rand() % (480) + 1; enemies[i].y = rand() % (272) + 1; enemies[i].vx = 0; enemies[i].vy = 0; enemies[i].speed = rand() % 3 + 1; enemies_dead[i] = false; } oslSetBkColor(RGBA(0,0,0, 0)); oslSetTextColor(RGB(255,2 55,255)); } void Keys() { oslReadKeys(); if(!paused) { //joypad (move mickey on the screen) if (osl_keys->held.down) my += 6; if (osl_keys->held.up) my -= 6; if (osl_keys->held.left) mx -= 6; if (osl_keys->held.right) mx += 6; //joystick (deform mickey) for (int i=24;i<=120;i+=16) { if (osl_keys->analogX > i) mx+=1; if (osl_keys->analogY > i) my+=1; if (osl_keys->analogX < -i) mx-=1; if (osl_keys->analogY < -i) my-=1; } } if (mx<0) mx = 0; if (mx+15>480) mx = 480 - 15; if (my<0) my = 0; if (my+15>272) my = 272-15; XM = mx+7; YM = my+7; if (osl_keys->held.L) Angle--; if (osl_keys->held.R) Angle++; if (bgeffects == 1) fire(); //buttons if (osl_keys->pressed.start) { paused = !paused; yyy = -10; } if (osl_keys->pressed.select) { bgeffects++; if(bgeffects > 3) bgeffects = 1; } } int main(int argc, char* argv[]) { oslInit(0); //The lib oslInitGfx(OSL_PF_8888, 1); //Gfx oslInitConsole(); //Text oslInitAudio(); srand(time(NULL)); music = oslLoadSoundFile("music.b gm", OSL_FMT_STREAM); oslAssert(music); //Debug: verify that it could be loaded oslSetSoundLoop(music, 1); punch = oslLoadSoundFile("punch.w av", OSL_FMT_NONE); oslAssert(punch); //Debug: verify that it could be loaded oslSetSoundLoop(punch, 0); ouch = oslLoadSoundFile("ouch.wa v", OSL_FMT_NONE); oslAssert(ouch); //Debug: verify that it could be loaded oslSetSoundLoop(ouch, 0); oslPlaySound(music, 0); logo(); // load imgs player = oslLoadImageFile("player. png", OSL_IN_RAM, OSL_PF_8888); weapon = oslLoadImageFile("weapon. png", OSL_IN_RAM, OSL_PF_8888); weapon2 = oslLoadImageFile("weapon2 .png", OSL_IN_RAM, OSL_PF_8888); for(int i =0; i < NUM_ENEMIES; i++) enemies[i].img = oslLoadImageFile("enemy.p ng", OSL_IN_RAM, OSL_PF_8888); LoadDefaults(); while(!osl_quit) { Keys(); /////////////////////// oslStartDrawing(); oslClearScreen(RGB(0,0,0) ); if(bgeffects != 3) { for (int W = 0; W < NUM_OF_OBS; W++) { oslDrawLine (int (XW [W] - (VX [W] * 2)), int (YW [W] - (VY [W] * 2)), int (XW [W]), int (YW [W]), C1); XW [W] = XW [W] + VX [W]; YW [W] = YW [W] + VY [W]; VY [W] = VY [W] - G; if (YW [W] < 1) VY [W] = - (VY [W] / 1.25f); if (XW [W] > 480 || XW [W] < 1) VX [W] = -VX [W]; oslDrawLine (int (XW [W] - (VX [W] * 2)), int (YW [W] - (VY [W] * 2)), int (XW [W]), int (YW [W]), C2); } } oslDrawLine(mx+7, my+7, int(springobject.x+5), int(springobject.y+5), RGB(255,255,255)); oslDrawLine(mx+5, my+5, int(springobject.x+3), int(springobject.y+3), RGB(255,255,255)); player->x = mx; player->y = my; oslDrawImage(player); // draw player weapon->x = int(springobject.x); weapon->y = int(springobject.y); oslDrawImage(weapon); if (score >= 100) { weapon2->y = int(springobject.x); weapon2->x = int(springobject.y); oslDrawImage(weapon2); } // draw weapon for (int i = 0; i < NUM_ENEMIES; i++) { enemies[i].img->x = int(enemies[i].x); enemies[i].img->y = int(enemies[i].y); oslDrawImage(enemies[i].img); } healthtemp = health / totalhealth * 480; oslDrawGradientRect(0, 0, int (healthtemp), 15, RGBA(0,0,0,125), RGBA(0,180,0,125), RGBA(0,180,0,125), RGBA(0,0,0,125)); oslPrintf_xy(0, 262, "Score: %i", score); if(!paused) { springphysics(); ai(); collisions(); } else { oslPrintf_xy(200, yyy, "P.A.U.S.E.D"); yyy++; if (yyy > 272) yyy = -10; } oslEndDrawing(); oslSyncFrame(); oslAudioVSync(); if (health <= 0) { if (score < 400) { oslDebug("All great things come to an end...\n\nFinal Score: %i", score); } else { oslDebug("You beat my highscore of 400 with your final score of %i, congrats! ...*sob*...", score); oslDebug("To reward you for this great feat..."); oslDebug("If you have any game ideas that you'd like to see on the PSP..."); oslDebug("Send some info (design docs are perfect) my way and who knows what'll happen ;)"); } LoadDefaults(); } //sceKernelDelayThread(1000 ); //? } oslStopSound(music); oslStopSound(ouch); oslStopSound(punch); oslDeinitAudio(); oslQuit(); return 0; }

i redid it as main.cpp and now ur only error is
line: 60 : expected ',' or '...' before '-' token

void oslDrawLine(int x-1, int y-1, int x-1, int y-1, OSL_COLOR color);

thats line 60