clear(bitboard, littleEndian?)

Clears the cells of the quadrille according to a bitboard passed as a JavaScript BigInt. Each 1 bit in the binary representation corresponds to a cell to be cleared (set to null). The bitboard is read in row-major order, using big-endian by default.

To use little-endian ordering instead, pass true as the second argument.

Example

(click to toggle clearing the smiley pattern)

code

Quadrille.cellLength = 50;

let quadrille;
let cleared = false;

const SMILEY = 0b0000000_0110110_0001000_0001000_0100010_0011100_0000000n;

function setup() {
  createCanvas(350, 350);
  quadrille = createQuadrille(7, 7);
  quadrille.fill(color('black')); // Fill entire board
}

function draw() {
  background('lemonchiffon');
  drawQuadrille(quadrille);
}

function mousePressed() {
  cleared ? quadrille.fill(color('black')) : quadrille.clear(SMILEY);
  cleared = !cleared;
}

Syntax

clear(bitboard[, littleEndian])

Parameters

Param	Description
`bitboard`	BigInt (or Number): A bitboard whose binary `1` bits indicate the cells to clear
`littleEndian`	Optional Boolean: If `true`, the bitboard is interpreted in little-endian order (default is `false`)

clear(row)clear(row, col, directions, border)