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  •  » GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

#1 2009-06-26 22:45:15

Kadede
Member

GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

Hi, I need to draw a graph showing the x position of the wiimote in function of the time.

The (simpified) code should be something like this:

Code:

33        if ( held & WPAD_BUTTON_A ){
34            graph[grr]={grr, ir1.sx, 0};
35            grc++;
36            GRRLIB_NPlot(graph, 0xFFFFFFFF, 640);
37            if(grc==640)grc=0;
38        }

(Of course each variable and the vector are properly defined in main() ).

But it doesn't work, I get this error when compiling:

Code:

main.c:34: error: expected expression before '{' token

What am I doing wrong? I couldn't find any example using it, so I have no reference, and the only example using vectors (Day 9 tutorial) defines the vector at main(), and I need to define it in while(1).

Thanks previously.

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#2 2009-06-26 23:11:40

Crayon
Bad Mother Fucker

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

Hi, graph is declared as what? Could paste the code?

Useful links: libOGC Documentation, libOGC Repository, GRRLIB Documentation, GRRLIB Repository, #GRRLIB on IRC

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#3 2009-06-26 23:14:19

Kadede
Member

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

What I really need is to show a graph of the distance from the screen center to the wiimote cursor.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <gccore.h>
#include <wiiuse/wpad.h>
#include <math.h>
#include "GRRLIB/GRRLIB/GRRLIB.h"
#include "gfx/console.h"

Mtx GXmodelView2D;


int main() {

    ir_t ir1;

    // Initialise the video system
    GRRLIB_Init();
        
    // This function initialises the attached controllers
    WPAD_Init();

    WPAD_SetDataFormat(WPAD_CHAN_0, WPAD_FMT_BTNS_ACC_IR);

    GRRLIB_texImg tex_font = GRRLIB_LoadTexture(console);
    GRRLIB_InitTileSet(&tex_font, 8, 8, 0);

    int grc = 0;
    Vector grafica[640];

    while(1) {

        WPAD_SetVRes(0, 640, 480);
        WPAD_ScanPads();
        WPAD_IR(WPAD_CHAN_0, &ir1);
        u32 pressed = WPAD_ButtonsDown(0);
        u32 held = WPAD_ButtonsHeld(0);

        int xpos = ir1.sx-250;
        int ypos = ir1.sy-250;
        
        // Si pulsamos A calculamos la distancia del cursor al centro de la pantalla y trazamos la línea que une a este con el cursor
        if ( held & WPAD_BUTTON_A ){
            int vx = abs(xpos-320)^2;
            int vy = abs(ypos-240)^2;
            int distance = (vx+vy);
            GRRLIB_Printf(10, 10, tex_font, 0xFFFFFFFF,1, "\n%i", distance);
            GRRLIB_Printf(10, 20, tex_font, 0xFFFFFFFF,1, "\n%i", grc);
            GRRLIB_Line(320, 240, xpos, ypos, 0xFFFFFFFF);    //vector hacia el lápiz
            grc++;
            grafica[grc]={grc, distance, 0.0f}
            GRRLIB_NPlot(grafica, 0xFFFFFFFF, 640);
            if(grc==640)grc=0;
        }

        // We return to the launcher application via exit
        if ( pressed & WPAD_BUTTON_HOME ) break;

        GRRLIB_Render();
    }
    GRRLIB_Exit(); 
    return 0;
}

Last edited by Kadede (2009-06-26 23:14:57)

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#4 2009-06-26 23:25:37

Crayon
Bad Mother Fucker

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

Ok I don't know the type Vector? And what is the Day 9 tutorial?

Useful links: libOGC Documentation, libOGC Repository, GRRLIB Documentation, GRRLIB Repository, #GRRLIB on IRC

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#5 2009-06-26 23:51:28

Kadede
Member

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

This is the day 9 tutorial:
http://grrlib.santo.fr/wiki/wikka.php?wakka=Day9

Of course, it works if I give the vector values in main(), but this is not what I want. In adittion, I need 640 different vectors - too much to be defined. wink

Last edited by Kadede (2009-06-26 23:59:59)

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#6 2009-06-27 00:12:47

Crayon
Bad Mother Fucker

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

Kadede wrote:

This is the day 9 tutorial:
http://grrlib.santo.fr/wiki/wikka.php?wakka=Day9

This an old GRRLIB 3.0.1 alpha tutorial.

Would it be easier to create an array of struct?

Code:

typedef struct
{
    int Count;
    int Position;
    int Something;
} MyArray;

MyArray grafica[640];

I not sure yet I understand what you want to do!

Useful links: libOGC Documentation, libOGC Repository, GRRLIB Documentation, GRRLIB Repository, #GRRLIB on IRC

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#7 2009-06-27 00:19:29

NoNameNo
Administrator

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

hi Crayon,

From what i know, Vector is something like this :

typedef struct
{
    int x;
    int y;
    int z;
} Vector;

so...

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#8 2009-06-27 00:23:03

Crayon
Bad Mother Fucker

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

NoNameNo wrote:

hi Crayon,

From what i know, Vector is something like this :

typedef struct
{
    int x;
    int y;
    int z;
} Vector;

so...

It's almost that wink
That's what I just found in gu.h

Code:

typedef struct _vecf {
    f32 x,y,z;
} Vector;
Useful links: libOGC Documentation, libOGC Repository, GRRLIB Documentation, GRRLIB Repository, #GRRLIB on IRC

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#9 2009-06-27 00:36:18

Kadede
Member

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

Crayon and Nonameno, really thanks for the help. Finally I solved it by this way:

Code:

            grc++;
            grafica[grc]=distance;
            for(i=0; i<640; i++){
                GRRLIB_Plot(i, grafica[i], 0xFFFFFFFF);
            }
            if(grc==640)grc=0;

It is simplier and easier. Thanks again.

EDIT:

This way better:

Code:

        
            grc++;
            grafica[grc]=480-distance;
            for(i=0; i<640; i++){
                if(grafica[i]!=0)GRRLIB_Line(i, grafica[i], i-1, grafica[i+-1], 0x00FF00FF);
            }
            if(grc==640)grc=0;

Last edited by Kadede (2009-06-27 00:49:58)

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#10 2009-06-27 00:52:17

Crayon
Bad Mother Fucker

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

The other way around would have been:

Code:

            Vector vTemp;
            vTemp.x = grc;
            vTemp.y = distance;
            vTemp.z = 0.0f;
            grafica[grc] = vTemp;
            GRRLIB_NPlot(grafica, 0xFFFFFFFF, 640);
Useful links: libOGC Documentation, libOGC Repository, GRRLIB Documentation, GRRLIB Repository, #GRRLIB on IRC

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#11 2009-07-07 22:12:20

Crayon
Bad Mother Fucker

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

Crayon wrote:

That's what I just found in gu.h

Code:

typedef struct _vecf {
    f32 x,y,z;
} Vector;

19 hours ago the Vector structure was change to guVector to avoid collisions.
Changes could be seen on this page: http://devkitpro.svn.sourceforge.net/vi … mp;r2=3650

Useful links: libOGC Documentation, libOGC Repository, GRRLIB Documentation, GRRLIB Repository, #GRRLIB on IRC

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#12 2009-07-08 09:32:06

NoNameNo
Administrator

Re: GRRLIB_NPlot :: How to use it an how to dinamically set the Vector?

according to this i think grrlib need a little update...

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