3D Space Coordinate Calculation using Indexing System

This code block seems to be calculating the coordinates of a point in a 3D space using an indexing system.

The first line calculates the index of the point in the x-direction using the values of 'i', 'j', and 'k'. The second line calculates the index in the y-direction using the same values of 'i', 'j', and 'k' but with different coefficients. The third line calculates the index in the z-direction using the same values of 'i', 'j', and 'k' but with different coefficients again.

Finally, the values of the x, y, and z coordinates are stored in arrays 'x_coor', 'y_coor', and 'z_coor' respectively. The variable 'm' is used to keep track of the index of the current point being calculated.