Hello kind folk, I am in the unfortunate position of being terrible at math but still trying to program computers. My apologies for my ignorance and slowness (liberal arts major, go figure ).
As the title says, I've been trying to figure out how to convert 2d matrix coordinates (where x = column and y = row) to a 1d array (a long list of all the points in the matrix). The array starts at 0, as most programming languages do. So the array is just a list of all the matrix cells as if you took each row or the matrix and set it at the end of the previous row. For example, from this matrix:
to this array:
._ _ _.
Unfortunately, it's not as simple as x * y. I'm actually "embedding" a smaller matrix into a large parent matrix -- a matrix within a matrix (metamatrix?). So my trouble has been finding an equation that will convert the embedded matrix coordinates to the larger matrix coordinates, THEN converting those coords into its corresponding index/position in the list (of the parent matrix). So far, I've actually gotten this to work:
._ _ _ _ _ _ _ _ _.
Thing is, that only works for arrays that are 1-based, as in they start at 1 (instead of starting at 0). Does that make any sense? Any ideas?
parent matrix array index = parentMatrixNumColumns * embedMatrixCell.y - (parentMatrixNumColumns - embedMatrixCell.x)