从展平的三维阵列计算三维坐标

鉴于

sometype array[XSIZE][YSIZE][ZSIZE];

然后作为一维数组,如果 x>=0和x<xsize、y>=0和y<ysize和z>=0和z<zsize,然后

Index = ((x * YSIZE + y) * ZSIZE) + z;      // Row major order, C/C++
Index = ((z * YSIZE + y) * XSIZE) + x;      // Col major order

对于计算指数,给定x,y,z:

// For Row major order
z = Index % ZSIZE;
y = (Index / ZSIZE) % YSIZE;
x = Index / (ZSIZE * YSIZE);

// For Col major order
x = Index % XSIZE;
y = (Index / XSIZE) % YSIZE;
z = Index / (XSIZE * YSIZE);

如果

index = x + (y + (z * ZSIZE)) * YSIZE 

然后:

x = index % YSIZE
Y = ((index - x) / YSIZE) % ZSIZE
Z = (index - x - y*YSIZE) / (ZSIZE * YSIZE)