2d List Clr

Question

Hi all.

I have a problem with what i have understand as "Jagged List"

it creates ok, my problem is to access the columns easy and fast.

value struct triangle {
public:

    double x = 0, y = 0, z = 0;// w = 0;
    // Initiated constructor(dx,dy,dz)
    triangle(double dx, double dy, double dz)
    {
        x = dx;
        y = dy;
        z = dz;
        // w = 1 used for affine matrix transformations...
    };
};




            int i = 0;
    tris->Add(gcnew List<triangle>());
    tris[i]->Add(triangle(0.0f, 0.0f, 0.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 0.0f, 0.0f));

    tris->Add(gcnew List<triangle>());
    i += 1;
    tris[i]->Add(triangle(1.0f, 0.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(1.0f, 0.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(1.0f, 0.0f, 1.0f));

    tris->Add(gcnew List<triangle>());
    i += 1;
    tris[i]->Add(triangle(1.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(1.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 1.0f));


    tris->Add(gcnew List<triangle>());
    i += 1;
    tris[i]->Add(triangle(0.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 0.0f));

    tris->Add(gcnew List<triangle>());
    i += 1;

    tris[i]->Add(triangle(0.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 1.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 1.0f));
    tris[i]->Add(triangle(1.0f, 1.0f, 0.0f));
    tris->Add(gcnew List<triangle>());
    i += 1;
    tris[i]->Add(triangle(1.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 0.0f, 1.0f));
    tris[i]->Add(triangle(0.0f, 0.0f, 0.0f));
    tris[i]->Add(triangle(1.0f, 0.0f, 0.0f));

            int count = tris->Count;
    for (int i = 0; i < 8; i++) {
        tris[i];
        // that is okey
        for (int j = 0; j < 6; j++) {
            tris[i][j];
            int k = 0; // djust for trace
            // That gives error 
            //default get generic list cannot be called
        }
    }

or maybe you out there have a better to write the same thing

regards ollp

Answer 1

Another example to digest:

int count = tris->Count;
for (int i = 0; i < count; i++) {
    List<triangle>^ lt = tris[i];
    for (int j = 0; j < lt->Count; j++) {
        Console::WriteLine("{0}  {1}  {2}",
            lt[j].x,
            lt[j].y,
            lt[j].z);
    }
    Console::WriteLine();
}

• Wayne

Answer 2

int count = tris->Count;
for (int i = 0; i < 8; i++) {
tris[i];
// that is okey
for (int j = 0; j < 6; j++) {
tris[i][j];
int k = 0; // djust for trace
// That gives error
//default get generic list cannot be called
}
}

Assuming console output, see if these examples give you any ideas:

int count = tris->Count;
for (int i = 0; i < count; i++) {  
    int inner_count = tris[i]->Count;
    for (int j = 0; j < inner_count; j++) {
        Console::WriteLine("{0}  {1}  {2}",
            tris[i]->ToArray()[j].x,
            tris[i]->ToArray()[j].y,
            tris[i]->ToArray()[j].z);            
    }
    Console::WriteLine();
}

int count = tris->Count;
for (int i = 0; i < count; i++) {
    int inner_count = tris[i]->Count;
    array<triangle>^ arry = tris[i]->ToArray();
    for (int j = 0; j < inner_count; j++) {            
        Console::WriteLine("{0}  {1}  {2}",
            arry[j].x,
            arry[j].y,
            arry[j].z);
    }
    Console::WriteLine();
}

• Wayne