`clear()` #

Clears quadrille cells (i.e., sets cells to null). Either all cells, a given cell, a given row or a set of identical cells using flood fill or all cells.

Example #

(click on any cell; press ‘c’ to clear all cells or ‘r’ to reset)

code

Quadrille.cellLength = 20;
let quadrille;
let mode;

function setup() {
  createCanvas(400, 400);
  mode = createSelect();
  mode.option('cell');
  mode.option('row');
  mode.option('flood fill 4-directions');
  mode.option('flood fill 4-directions border');
  mode.option('flood fill 8-directions');
  mode.option('flood fill 8-directions border');
  mode.selected('cell');
  reset();
}

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

function mouseClicked() {
  const row = quadrille.mouseRow;
  const col = quadrille.mouseCol;
  switch(mode.value()) {
  case 'cell':
    quadrille.clear(row, col);
    break;
  case 'row':
    quadrille.clear(row);
    break;
  case 'flood fill 4-directions':
    quadrille.clear(row, col, 4);
    break;
  case 'flood fill 4-directions border':
    quadrille.clear(row, col, 4, true);
    break;
  case 'flood fill 8-directions':
    quadrille.clear(row, col, 8);
    break;
  case 'flood fill 8-directions border':
    quadrille.clear(row, col, 8, true);
    break;
  }
}

function keyPressed() {
  if (key === 'c') {
    quadrille.clear();
  }
  if (key === 'r'){
    reset();
  }
}

function reset() {
  quadrille = createQuadrille(20, 20, 100, color('red'));
  quadrille.rand(100, color('green')).rand(100, color('blue')).
            rand(100, color('cyan'));
}

Syntax #

clear()

clear(row, col)

clear(row)

clear(row, col, directions, border)

clear(row, col, directions)

clear(row, col, border)

Parameters #

parameter	description
row	Number: number of the row to be cleared [0..height]
col	Number: row number of the cell to be filled [0..width]
directions	Number: 4 or 8 directions of flood fill default is 4
border	Boolean: specifies whether to include the border of a clearing area in flood fill default is `false`

clear() #

Example #

Syntax #

Parameters #

`clear()` #