c++ - Shifting elements in array by N elements -

I have an array where each 'element' is made up of 4 consecutive values. After the update, I take the array to the end of the 4 values ​​and at the beginning I put 4 new values.

Shift:

  int m = 4; For (int i = _vsize - 1; i + 1 - m! = 0; i -) {_varray [i] = std :: move (_varray [i - m]) for; }  

Insertion:

  memcpy (& amp; _varray [0], glm :: value_ptr (new_element), 4 * size (float));  

Where new_element is of type glm :: vec4 which contains 4 new values.

Any suggestions on how to improve it?

(I'm just transferring from one element, but to say the flexibility to be able to loop is to say 8 times, without putting any loop in it)

Thank you. / P>

You can try to copy a range of values ​​from another category into the same container Since limitations are and you are copying right you can not use the regular std :: copy but instead of std :: copy_backward Should use.

  int m = 4; // It is a respected std :: copy_backward (& amp; _varray [0], & _varray [_vsize -m] & amp; _varray [_vsize]) of its 'element' size;  

There too, but this is really nothing because your float values ​​are not running.