C/C++ Programming Help Thread

[SG57]

Ive had to resort to Lua, but ya im trying... Dont like it as it messes with my C syntax, but its all good i guess.

[coolguy5678]

Ive had to resort to Lua, but ya im trying... Dont like it as it messes with my C syntax, but its all good i guess.

Whenever I look at Lua code, the lack of semi-colons just jumps at me...

[hallo007]

any suggestions?

[MasterChief117]

dl all auto makes again in the cygwin setup
-= Double Post =-

[email protected] ~/psptoolchain
$ ./toolchain.sh
--19:13:07--  ftp://ftp.gnu.org/pub/gnu/binutils/binutils-2.16.1.tar.gz
           => `binutils-2.16.1.tar.gz'
Resolving ftp.gnu.org... 199.232.41.7
Connecting to ftp.gnu.org|199.232.41.7|:21... connected.
Logging in as anonymous ...

mine freezes at that

[PSPJunkie_]

Whenever I look at Lua code, the lack of semi-colons just jumps at me...

im exactly the same way. i just can't do it.

[psphacker12.]

Or more simply:

Blit image
Flip the buffer
Delay thread for five secs

Done. :)

Anyway I think that a PSP should know how to do this

this is what im trying to do but it doesn't work you try it.

#include <pspdisplay.h>
#include <pspctrl.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspgu.h>
#include <png.h>
#include <stdio.h>
#include "graphics.h" 
PSP_MODULE_INFO("Image Display Program", 0, 1, 1);

int main() {
initGraphics();
Image* Wallpaper = "wall.png";
blitAlphaImageToScreen(0, 0, 480, 272, Wallpaper, 0, 0);
flipScreen();
sceKernelDelayThread(3000000);
if (Wallpaper!=NULL) freeImage(Wallpaper);
sceKernelExitGame();
return 0; }

[SG57]

I wrote a tutorial how to get around that error at psp-programming.com.

Search through all the names of the threads ive created over there, and you should find it. I havent made too many over there, so....
-= Double Post =-
guy above me - you need to load the image properly:

Image *Wallpaper = loadImage("image.png");

I believe that would work

[PSPJunkie_]

I wrote a tutorial how to get around that error at psp-programming.com.

Search through all the names of the threads ive created over there, and you should find it. I havent made too many over there, so....
-= Double Post =-
guy above me - you need to load the image properly:

Ijmage *Wallpaper = loadImage("image.png");

I believe that would work

lol Ijmage....

Image *Wallpaper = loadImage("image.png");

[SG57]

Wow... troll much?

[hallo007]

how do you write to a file white hex edit
for example to offset -> 962c??

[Waterbottle]

how do you write to a file white hex edit
for example to offset -> 962c??

fseek(file, 0x962c, SEEK_SET);



If I backup my entire cygwin folder, reformat my computer then copy the cygwin folder back would cygwin work then? Or does it rely on some registry keys or other files or something that are created on instalation?

[MasterChief117]

sorry, but i need to post this:

WAHOO!!!!!!! CYGWIN JUST INSTALLED DA PSPTOOLCHAIN!!!!!!
[/sorry]

[hallo007]

fseek(file, 0x962c, SEEK_SET);

now its readed and how do you write then?
for example at that ligne stands P.H.O.T.O
and i want it I.M.A.G.E

[Waterbottle]

now its readed and how do you write then?
for example at that ligne stands P.H.O.T.O
and i want it I.M.A.G.E

fwrite... Theres no difference to writing normally, just move to the position in the file then write normally.

[hallo007]

@waterbottle thnx

any suggestions?

they just reinstalled cygwin and its still not working:s

[SG57]

hallo - your english is atrocious. Bad programming comes from poor typing skills, and your demonstrating very poor typing skills..

The past tense of 'read' is 'read'... Why take the energy and time to type something that is unneeded, in this case the 'ed'... Also, i suggest you GOOGLE! next time... Most of your questions are NOT PSP specific, there fore youd find an immense amount of information on the first page of a google search.

Your problem, automake isnt installing correctly, or even at all, during installation. Choose a different, more reliable mirror. I use the ftp from redhat mirror.

Also, is piracy so important to you that you need to bookmark a torrent search engine , and blatantly show it off?

One more thing - its a called 'cropping'... Might want to look it up.

[nataku92]

um if you looked at his screenshot, it's sort of obvious that his main language isn't english. You really shouldn't criticize other people, especially when your own post contains just as many grammatical errors.

[SG57]

Ok. Please, point out as many grammacical errors in my last post, to his.

Also, quit going off topic, atleast my post gave him an idea of how to fix his problem.

On Topic:

YOu may also consider using the PSPDevWin32 Intsaller if all elsefails, but it has a predefined set of libraries you can use, but its a last resort if cygwin + toolchain on your pc just dont want to mix

[SuperBatXS]

Ok. Please, point out as many grammacical errors in my last post, to his.

Also, quit going off topic, atleast my post gave him an idea of how to fix his problem.

On Topic:

YOu may also consider using the PSPDevWin32 Intsaller if all elsefails, but it has a predefined set of libraries you can use, but its a last resort if cygwin + toolchain on your pc just dont want to mix

SG, enough criticism. I never know this side of you. Also, it's not YOu, it's You. Also, it's not grammacical error, it's grammatical. So stop criticizing, for it is not very hard to criticize you.

[SG57]

super - Good point, my bad, sorry for typing too fast as my bid on ebay for a PSP just got outbid and was ending soon, so I accidentally capitalized the 'O' in 'You'. Really proves a point ;) As for grammatical and grammacical, my spelling isnt perfect, Ill admit that, but you atleast knew what I was saying, as my words were structured in a readable fashion, where as

"now its readed and how do you write then?
for example at that ligne stands P.H.O.T.O"

Is very hard, atleast for me, to make out... What is ligne (edit - just googled it and it turns out ligne is the french word for line, and is the name of a river ;) are you french hallo?) - it cant be a typo as 'g' is too far from 'n' and too far from 'i'... Im not bashing hallo for his broken english, rather hoping next time, he'll run his post through a [insert his native language] -> english converter, in hopes itll produce somewhat better results... Sorry if that came out wrong last time, or this time, its just that Ive seen many posts by hallo concerning programming, and his problem is almost always grammar (be it punctuation or spelling). So ya, sorry about earlier, little tense having to get only 8 hours asleep on the weekend :Argh:

[hallo007]

no i am dutch ;)
-= Double Post =-
is there already a way found to load usb on 2.8+??

[SG57]

If the normal way doesnt work, than search around for a 2.8+ app that has it. Also, to dev for 2.8+ dont you need that special SDK built for custom firmware?

I have a little question. Ive made my own particle engine, and im proud of it. Now, I want the color of each particle to intensify when overlapping another, so i was thinking something like:

PUESDO CODE:

for i=0 to max_particles {
    for j=0 to max_particles {
        if i != j { // so you dontcompare one particle with itself
            if particle[i].x == particle[j].x and particle[i].y == particle[j].y {
                particle[i].red = particle[i].green = particle[i].blue = particle[j].red = particle[j].green = particle[j].blue += 3
            } else if (particle[i].red > default_color_value) {
                particle[i].red = particle[i].green = particle[i].blue = particle[j].red = particle[j].green = particle[j].blue -= 3
            }
        }
    }
}

That should make it a more intense WHITE color when 2 particles overlap, and when they dont, it should dull out to the default particle color... Im doubting itll work, so im posting here. Does anyone have a good idea as to what i could do if this method doesnt work?

[Raphael]

Don't do this. It's hard to manage and slow as hell.
Just use additive blending when drawing your particles. Depending on your render API, use sceGuBlendMode(GU_ADD, GU_FIX, GU_FIX, 0xFFFFFFFF, 0xFFFFFFFF) or the GL equvialent, or in software mode when drawing, just do something like that (pseudocode):

#define ADDRGB( C1, C2 ) RGBA( MIN(255,A(C1)+A(C2)), MIN(255,R(C1)+R(C2)), MIN(255, G(C1)+G(C2)), MIN(255,B(C1)+B(C2)) )
function putpixel( x, y, color )
{
    *(FRAMEBUFFER+x+y*LINE_SIZE) = ADDRGB(*(FRAMEBUFFER+x+y*LINE_SIZE), color);
}

The ADDRGB macro depends on your other macros for getting channels from a color and mixing the channels back into a color type, plus the MIN macro which returns the smaller of the two parameters (prevents color component overflow). There are tricks with LUTs to do that color addition very quickly (2 shifts, 2 and, 1 add, 1 table lookup). If you're interested LMK.

[hallo007]

If the normal way doesnt work, than search around for a 2.8+ app that has it. Also, to dev for 2.8+ dont you need that special SDK built for custom firmware?

the last SDK sample was for 2.71
and i dont know any app's except the recovery:s

[hallo007]

will this work ?? Is there a better way?

                           char addline[200]=current_selection;
                           FILE * prx;
     
                           prx = fopen ("flash0:/kd/pspcnf_game.txt" , "r");
                           fseek(prx,SEEK_END , 0);
                           
                           fwrite(addline, sizeof(addline[0]), sizeof(addline)/sizeof(addline[0]), prx);
                           fclose(prx);

[Raphael]

http://www.cplusplus.com/fopen
Read that site and especially the opening modes.

[andyauff]

Someone please help. I am trying to install the psptoolchain so I entered this into cygwin: ./toolchain.sh and get this error: "ERROR: Please make sure you have 'automake' installed. Any help will be appreciated, thanks.

[SG57]

Reinstall the toolchain (more specifically 'automake' package) from a more reliable mirror. I persobally have used the FTP redhat mirror.

Raphael - Im using Lua (only until my PSP comes in the mail) so I can't use pointers, nor the shift operator (please correect me if im wrong... seriosuly! pllllleeeasee... id love to have these). Im sure there are work arounds, but Ill just wait for my PSP to arrive and get back to using PSPGL (i might move to the GU, but OpenGL is so portable, i can codeo n PC and quite quickly port it to work on the PSP)

[andyauff]

I used http://ps2dev.org/psp/Tools/Toolchain/, is there a better place?

[Raphael]

There's no shift arithmetic involved in my code, unless you thought about the RGB macros. However, shifts are nothing else than multiplys or divides, depending on shift direction.
ie (x << 1 == x * 2) && (x >> 1 == x / 2). For every bit you shift, you divide/multiply by another 2, so shifting by 3 would mean mult/div by 8 (2^3).
So you can rewrite those macros into functions that do the conversion with multiplies.

function RGB(r,g,b)
    return r*65536 + g*256 + b;

For the pointer code, that was just a shortcut pseudo code for your actual PUTPIXEL/GETPIXEL function or whatever you use.