[Vala] [Fwd: Re: 2D Static Array]

[JM <interflug1 gmx net>]

Forgot to include the mailinglist

-------- Weitergeleitete Nachricht --------
> Von: JM <interflug1 gmx net>
> An: michele cremasco <michele cremasco gmail com>
> Betreff: Re: [Vala] 2D Static Array
> Datum: Tue, 20 Apr 2010 14:02:30 +0200
>
> Hello
> Try it this way. In vala array is part of the type 
>
> public class Matrix
> {
>       public Matrix(double[,] x){
>               mat = x;
>       }
>       public double[,] mat;
> }
>
> public static int main() {
>       var y = new Matrix({{ 2.0, 3.0, 4.0, 5.0},
>                           { 2.0, 3.0, 4.0, 6.0},
>                           { 2.0, 3.0, 4.0, 7.0},
>                           { 2.0, 3.0, 4.0, 8.0}});
>       print("get element: %lf\n", y.mat[2,3]);
>       return 0;
> }
>
>
> Regards
> Jörn
>
>
>
> Am Dienstag, den 20.04.2010, 12:03 +0200 schrieb michele cremasco:
> > typedef struct _Matrix Matrix;
> > struct _Matrix
> > {
> >    float mat[4][4];
> > }
> >
> > Converting in vala, it becomes:
> >
> > [Compact]
> > public class Matrix
> > {
> >     public float mat[4,4];
> > }
> >
> > But compiler doesn't support multi dimensional embedded array!!
> >
> > If I write in the following way it embeds correctly the mono
> > dimensional
> > array:
> >
> > Compact]
> > public class Matrix
> > {
> >     public float mat[16];
> > }
> >
> > But it is not what I whant.
> >
> > Eventually I can add inline getteres and setters:
> >
> > [Compact]
> > public class Matrix
> > {
> >     public float mat[16];
> >
> >     public inline float get(int row, int col)
> >     {
> >         return mat[row*4 + col];
> >     }
> >
> >     public inline void set(int row, int col, float val)
> >     {
> >         mat[row*4 + col] = val;
> >     }
> > }