mapZx()

Index syten::SQL::Helpers::mapZx	(	int	x,
		int	y,
		int	l,
		int	w
	)

Z-like map; x and y exchanged:

y->
x  0  6 12  .
|  1  7 13  .
v  2  8 14  .
   3  9  .  .
   4 10  .  .
   5 11  .  .

Parameters

x	length-coordinate, [0, l-1]
y	width-coordinate, [0, w-1]
l	length, [1, …)
w	width, [1, …)

Returns

0-indexed offset from the start if x != -1 != y and 0 denoting a non-diagonal lattice if x == -1 == y.

References mapZ().

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