bitCell(bitIndex, littleEndian?)
Returns the (row, col) coordinates of the cell corresponding to a given bitIndex in a bitboard, assuming row-major ordering.
By default, the index follows big-endian layout, where the most significant bit (MSB) maps to the top-left cell.
Set littleEndian to true to reverse this mapping, placing the least significant bit (LSB) at the top-left instead.
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Example for a 2×3 quadrille:
- Big-endian layout (default):
| 5 | 4 | 3 |
| 2 | 1 | 0 |- Little-endian layout:
| 0 | 1 | 2| 3 | 4 | 5 |Calling bitCell(4) returns (0,1) in big-endian, and (1,1) in little-endian.
Syntax
bitCell(bitIndex[, littleEndian])
Parameters
| Param | Description |
|---|---|
bitIndex | Number: the index of the bit to decode into (row, col) coordinates |
littleEndian | Optional Boolean: if true, interprets the bit index using little-endian layout |
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Also available as the static method
Quadrille.bitCell(bitIndex, width = 8, height = 8, littleEndian = false), which allows computing cell positions independently of any specific quadrille.