Homebrew Homebrew Development

[Manurocker95]

Hi there, can someone explain me how to use pictures with Citro2D (Citro3D?), as I don't understand the devkitpro's "gpusprites" example (they use a lot of sprites here, and from what I have understood, it all goes into 1 big t3x spritesheet ?)
Thanks to anyone who can point me the way to use pictures with Citro !

I recommend you to use PP2D. It is a modification of Citro2D so noob friendly. You can see my template here . You just need to create the texture with

pp2d_load_texture_png(TEXTURE_SPRITESHEET_ID,spritesheet);

and draw it with something like:

//Top screen
pp2d_begin_draw(GFX_TOP, GFX_LEFT);
pp2d_draw_texture_part(TEXTURE_SPRITESHEET_ID, xPosition, yPosition, xOffset, yOffset, SpriteWidth, SpriteHeight);
// Bottom screen
pp2d_draw_on(GFX_BOTTOM, GFX_LEFT);
pp2d_draw_texture_part(TEXTURE_SPRITESHEET_ID, xPosition, yPosition, xOffset, yOffset, SpriteWidth, SpriteHeight);
pp2d_end_draw();

For text:

pp2d_draw_text(xPosition, yPosition, sizeX, sizeY, rgbColor, "HELLO WORLD!!");

 

[randomdev]

I recommend you to use PP2D. It is a modification of Citro2D so noob friendly. You can see my template here . You just need to create the texture with

pp2d_load_texture_png(TEXTURE_SPRITESHEET_ID,spritesheet);

and draw it with something like:

//Top screen
pp2d_begin_draw(GFX_TOP, GFX_LEFT);
pp2d_draw_texture_part(TEXTURE_SPRITESHEET_ID, xPosition, yPosition, xOffset, yOffset, SpriteWidth, SpriteHeight);
// Bottom screen
pp2d_draw_on(GFX_BOTTOM, GFX_LEFT);
pp2d_draw_texture_part(TEXTURE_SPRITESHEET_ID, xPosition, yPosition, xOffset, yOffset, SpriteWidth, SpriteHeight);
pp2d_end_draw();

For text:

pp2d_draw_text(xPosition, yPosition, sizeX, sizeY, rgbColor, "HELLO WORLD!!");

Thank you! I'll give a try this afternoon.

 

[Magicrafter13]

Hi there, can someone explain me how to use pictures with Citro2D (Citro3D?), as I don't understand the devkitpro's "gpusprites" example (they use a lot of sprites here, and from what I have understood, it all goes into 1 big t3x spritesheet ?)
Thanks to anyone who can point me the way to use pictures with Citro !

I don't know if I quite understand your question, but I remember having problems understanding Citro2D at first as well. Maybe some of my projects could help? The 2 projects of mine that use Citro2D, are: BreakoutRedux, and Dungeon-Escape (on my GitHub).

--------------------- MERGED ---------------------------

I recommend you to use PP2D. It is a modification of Citro2D so noob friendly. You can see my template here . You just need to create the texture with

pp2d_load_texture_png(TEXTURE_SPRITESHEET_ID,spritesheet);

and draw it with something like:

//Top screen
pp2d_begin_draw(GFX_TOP, GFX_LEFT);
pp2d_draw_texture_part(TEXTURE_SPRITESHEET_ID, xPosition, yPosition, xOffset, yOffset, SpriteWidth, SpriteHeight);
// Bottom screen
pp2d_draw_on(GFX_BOTTOM, GFX_LEFT);
pp2d_draw_texture_part(TEXTURE_SPRITESHEET_ID, xPosition, yPosition, xOffset, yOffset, SpriteWidth, SpriteHeight);
pp2d_end_draw();

For text:

pp2d_draw_text(xPosition, yPosition, sizeX, sizeY, rgbColor, "HELLO WORLD!!");

A year ago I would have agreed with this, but once you figure out what to do, Citro2D is incredibly easy. And PP2D is not kept up to date I definitely would not recommend it. I don't even think the creator has the repo up anymore...

 

[randomdev]

I don't know if I quite understand your question, but I remember having problems understanding Citro2D at first as well. Maybe some of my projects could help? The 2 projects of mine that use Citro2D, are: BreakoutRedux, and Dungeon-Escape (on my GitHub).

--------------------- MERGED ---------------------------



A year ago I would have agreed with this, but once you figure out what to do, Citro2D is incredibly easy. And PP2D is not kept up to date I definitely would not recommend it. I don't even think the creator has the repo up anymore...

Thank you, yeah I think pp2d is too old and from what i saw in your homebrews, using Citro2d directly seems easy.

 

[Manurocker95]

A year ago I would have agreed with this, but once you figure out what to do, Citro2D is incredibly easy. And PP2D is not kept up to date I definitely would not recommend it. I don't even think the creator has the repo up anymore...

It worked flawlessly for me and there are a lot of mirrors of PP2D. I just recommended what I used some time ago

 

[gadzooks2]

Does anyone have a 'cheat sheet' of 3ds-specific c++ commands?
And a c++ tutorial welp.

 

[Vovonator]

Does anyone have a 'cheat sheet' of 3ds-specific c++ commands?
And a c++ tutorial welp.

Not sure of what you mean by 'cheat sheet' of 3ds specific C++ commands, but I guess you want the documentation?
Here: https://smealum.github.io/ctrulib/index.html

About that C++ tutorial, there are a bunch of them online, it's a question of personal preference, but here is one: http://www.cplusplus.com/doc/tutorial/

 

[gadzooks2]

Not sure of what you mean by 'cheat sheet' of 3ds specific C++ commands, but I guess you want the documentation?
Here: https://smealum.github.io/ctrulib/index.html

About that C++ tutorial, there are a bunch of them online, it's a question of personal preference, but here is one: http://www.cplusplus.com/doc/tutorial/

ty

 

[gadzooks2]

If I'm trying to add, say, fstream, to my c++ project, how would I do it?

 

[GalladeGuy]

If I'm trying to add, say, fstream, to my c++ project, how would I do it?

The same way you would add it to a normal C++ project.

 

[gadzooks2]

The same way you would add it to a normal C++ project.

Oh, ok. I thought I might have to move it somewhere for the compiler.

 

[Deleted User]

I was wondering if there was a doc of citro2d/3d i am a absolute beginner at 3ds homebrew and any help would be much appreciated thankyou

 

[Turumarth]

Hey I am an absolute beginner too; I made my first hello world on 3ds yesterday

I found this for citro2d citro2d devkitpro org / index html

Sorry I just joined the site so I can't post links yet!
Let me know if you have any luck finding one for citro3d!

 

[Deleted User]

Hey I am an absolute beginner too; I made my first hello world on 3ds yesterday

I found this for citro2d citro2d devkitpro org / index html

Sorry I just joined the site so I can't post links yet!
Let me know if you have any luck finding one for citro3d!

Okay great It is nice to know that I am not the only one who is a beginner

 

[Deleted User]

I was wondering if anybody could give me some pointers on making a simple 2d game for 3ds homebrew all I need is the basic way you would make a sprite move with a button press I am trying to alter the devkitPro sample gpusprites and I understand it would be something like this

if (kDown & KEY_LEFT)
{
set sprite position to 5 5
}

but it does not work any help would be so appriciated thanks

 

[catlover007]

I was wondering if anybody could give me some pointers on making a simple 2d game for 3ds homebrew all I need is the basic way you would make a sprite move with a button press I am trying to alter the devkitPro sample gpusprites and I understand it would be something like this

if (kDown & KEY_LEFT)
{
set sprite position to 5 5
}

but it does not work any help would be so appriciated thanks

sorry, but it seems to me, that you don't understand the code of the example. Maybe you should start by disecting it and try to understand the meaning of the individual code pieces. Then show me where in the code the position of the sprites is set and based upon what value?

 

[Deleted User]

...

 

[Deleted User]

...

 

[ShroomKing]

You seem lost...
It would be easier if you get comfortable with the language first, then play around with openGL or another graphics api. (On the PC, with proper documentation and a debugger)

Anyway, i threw together a simple example for moving a sprite:

#include <citro2d.h>
#include <3ds.h>

#define SCREEN_WIDTH  400
#define SCREEN_HEIGHT 240

int main() {
    romfsInit();
    gfxInitDefault();
    C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);
    C2D_Init(C2D_DEFAULT_MAX_OBJECTS);
    C2D_Prepare();
    consoleInit(GFX_BOTTOM, NULL);

    C3D_RenderTarget* top = C2D_CreateScreenTarget(GFX_TOP, GFX_LEFT);
    C2D_SpriteSheet spriteSheet = C2D_SpriteSheetLoad("romfs:/gfx/sprites.t3x");
    C2D_Sprite sprites;

    C2D_SpriteFromSheet(&sprites, spriteSheet, 0);
    C2D_SpriteSetCenter(&sprites, 0.5, 0.5);
    C2D_SpriteSetPos(&sprites, SCREEN_WIDTH/2, SCREEN_HEIGHT/2);

    while (aptMainLoop()) {
        hidScanInput();
        u32 kDown = hidKeysDown();
        u32 kHeld = hidKeysHeld();

        if (kDown & KEY_START)
            break;
       
        if (kHeld & KEY_UP)
            C2D_SpriteMove(&sprites, 0, -1.75);
        if (kHeld & KEY_DOWN)
            C2D_SpriteMove(&sprites, 0, 1.75);
        if (kHeld & KEY_LEFT)
            C2D_SpriteMove(&sprites, -1.75, 0);
        if (kHeld & KEY_RIGHT)
            C2D_SpriteMove(&sprites, 1.75, 0);

        C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
        C2D_TargetClear(top, C2D_Color32f(0.0, 0.0, 0.0, 1.0));
        C2D_SceneBegin(top);
        C2D_DrawSprite(&sprites);
        C3D_FrameEnd(0);
    }
    C2D_SpriteSheetFree(spriteSheet);
    C2D_Fini();
    C3D_Fini();
    gfxExit();
    romfsExit();
    return 0;
}

Also, please use code blocks.

 

[Deleted User]

You seem lost...
It would be easier if you get comfortable with the language first, then play around with openGL or another graphics api. (On the PC, with proper documentation and a debugger)

Anyway, i threw together a simple example for moving a sprite:

#include <citro2d.h>
#include <3ds.h>

#define SCREEN_WIDTH  400
#define SCREEN_HEIGHT 240

int main() {
    romfsInit();
    gfxInitDefault();
    C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);
    C2D_Init(C2D_DEFAULT_MAX_OBJECTS);
    C2D_Prepare();
    consoleInit(GFX_BOTTOM, NULL);

    C3D_RenderTarget* top = C2D_CreateScreenTarget(GFX_TOP, GFX_LEFT);
    C2D_SpriteSheet spriteSheet = C2D_SpriteSheetLoad("romfs:/gfx/sprites.t3x");
    C2D_Sprite sprites;

    C2D_SpriteFromSheet(&sprites, spriteSheet, 0);
    C2D_SpriteSetCenter(&sprites, 0.5, 0.5);
    C2D_SpriteSetPos(&sprites, SCREEN_WIDTH/2, SCREEN_HEIGHT/2);

    while (aptMainLoop()) {
        hidScanInput();
        u32 kDown = hidKeysDown();
        u32 kHeld = hidKeysHeld();

        if (kDown & KEY_START)
            break;
     
        if (kHeld & KEY_UP)
            C2D_SpriteMove(&sprites, 0, -1.75);
        if (kHeld & KEY_DOWN)
            C2D_SpriteMove(&sprites, 0, 1.75);
        if (kHeld & KEY_LEFT)
            C2D_SpriteMove(&sprites, -1.75, 0);
        if (kHeld & KEY_RIGHT)
            C2D_SpriteMove(&sprites, 1.75, 0);

        C3D_FrameBegin(C3D_FRAME_SYNCDRAW);
        C2D_TargetClear(top, C2D_Color32f(0.0, 0.0, 0.0, 1.0));
        C2D_SceneBegin(top);
        C2D_DrawSprite(&sprites);
        C3D_FrameEnd(0);
    }
    C2D_SpriteSheetFree(spriteSheet);
    C2D_Fini();
    C3D_Fini();
    gfxExit();
    romfsExit();
    return 0;
}

Also, please use code blocks.

WOW THANK YOU SO MUCH!!! this is great I was going to get into opengl but the installation was vague and the guide I followed had me download about five different programs THANKS AGAIN THIS IS GREAT!!! I also have code blocks it is a great IDE