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2013-10-31T00:46:41.157
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2013-10-31T00:46:41.157
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Here is an approach using C and structs to provide some degree of object oriented along with a set of helper functions. The idea here was to use Kerrick's suggestion of a contiguous array. I am not sure if I got the offset calculation correct and it has not been tested so it is worth what you are paying for it. However it may be helpful as a starting place. The idea is to have a single contiguous area of memory to make memory management easier. And to use a function to access a particular element using a zero based offset in the x, y, and z directions. And since I was not sure as to the element size/type, I made that a variable as well. <pre><code>#include <malloc.h> typedef struct _Array3d { int elSize; // size of each element of the array in bytes int side; // length of each side of the 3d cube in elements char * (*Access) (struct _Array3d *pObj, int x, int y, int z); char buffer[1]; } Array3d; static char * Array3d_Access (Array3d *pObj, int x, int y, int z) { char *pBuf = NULL; if (pObj && x < pObj->side && y < pObj->side && z < pObj->side) { pBuf = &(pObj->buffer[x * pObj->side * pObj->elSize * pObj->side * pObj->elSize + y * pObj->side * pObj->elSize + z * pObj->elSize]); } return pBuf; } // Create an Array3d cube by specifying the length of each side along with the size of each element. Array3d *Array3d_Factory (int side, int elSize) { Array3d *pBuffer = malloc (sizeof(Array3d) + side * elSize * side * elSize * side * elSize); if (pBuffer) { pBuffer->elSize = elSize; pBuffer->side = side; pBuffer->Access = Array3d_Access; } return pBuffer; } // Create an Array3d cube that is the same size as an existing Array3d cube. Array3d *Array3d_FactoryObj (Array3d *pObj) { Array3d *pBuffer = NULL; if (pObj) { int iBufferSize = pObj->side * pObj->elSize * pObj->side * pObj->elSize * pObj->side * pObj->elSize; pBuffer = malloc (sizeof(Array3d) + iBufferSize); if (pBuffer) { pBuffer->elSize = pObj->elSize; pBuffer->side = pObj->side; pBuffer->Access = pObj->Access; } } return pBuffer; } // Duplicate or clone an existing Array3d cube into new one. // Returns NULL if cloning did not happen. Array3d *Array3d_Dup (Array3d *pObjDest, Array3d *pObjSrc) { if (pObjSrc && pObjDest && pObjSrc->elSize == pObjDest->elSize && pObjSrc->side == pObjDest->side) { int iBufferSize = pObjSrc->side * pObjSrc->elSize * pObjSrc->side * pObjSrc->elSize * pObjSrc->side * pObjSrc->elSize; memcpy (pObjDest->buffer, pObjSrc->buffer, iBufferSize); } else { pObjDest = NULL; } return pObjDest; } int main(int argc, _TCHAR* argv[]) { Array3d *pObj = Array3d_Factory (10, 20 * sizeof(char)); char *pChar = pObj->Access (pObj, 1, 2, 3); return 0; } </code></pre>
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1. POC copy 3-dimensional array
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1. USRichard Chambers
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1. CO+1 for the work you did. Thanks.
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 UScsotiriou
2. CO@csotiriou, you are welcome. I actually enjoyed playing with the problem. It was kind of relaxing to do a small thing like this. So thank you for the opportunity!
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