array of array in irrlicht

[Lev_a]

How I can create array of array and than use it like MyArray[j].

Now I used:
irr::core::array<s32> node;
and than node = ....

irr::core::array<irr::core::array<s32>> node; - it's wrong;

Or I should use:
irr::core::array<s32 *> node???

[Baal Cadar]

The only thing that is wrong is the >>, which should be > >.
Though, frankly, as long as long as dimensions are known and don't change independently at runtime, I'd use a single flat array and do two-dimensional access via x+xsize*y as the index.

[warden]

i'd like to use this thread for another question on arrays:

is it possible to initialize an array with values from start?

i.e. core::array<int> array = [1,2,3,4] ?

until know i would rather use
core::array<int> array;
for (int i=0; i<4; i++) array.push_back(i+1);

but this doesn't help me when i have unordered items such as [4,2,1,3]

[Heizi]

this way it cannot work I think.
perhaps it works if you use () instead of [].

[vitek]

Code: Select all

s32 arr[] = { 4, 2, 1, 3 };

I think that is what you want. This is called aggregate initialization and only works with aggregate types [structure, union, or array or plain old data]. The core::array template does not meet these requirements.

Of course you could always do this...

Code: Select all

#define countof(x) (sizeof(x) / sizeof(*x))
s32 arr[] = { 4, 2, 1, 3 };

core::array<s32> vals;
for (u32 i = 0; i < countof(arr); ++i)
 vals.push_back(arr[i]);

// if you used the c++stdlib
std::vector<s32> vec;
std::copy(arr, arr + countof(arr), std::back_inserter(vec));

[warden@guest]

thanx a lot vitek, i'll try that!