This function returns cell data of a square maze. The data is a list of cells. A cell has the data structure `[x, y, type]`

. `x`

and `y`

are 0-based. `x`

means the x-th column and `y`

means y-th row for a cell. The value of `type`

can be `0`

, `1`

, `2`

, `3`

or `4`

. Setting them to constants is convenient.

```
NO_WALL = 0; // the cell has no wall
TOP_WALL = 1; // the cell has a top wall
RIGHT_WALL = 2; // the cell has a right wall
TOP_RIGHT_WALL = 3; // the cell has a top wall and a right wall
MASK = 4; // the cell is masked.
```

The cell data is seperated from views. You can use cell data to construct different types of mazes.

**Since:** 2.5

## Parameters

`rows`

: The number of rows.`columns`

: The number of columns.`start`

: The start point to travel the maze. Default to`[0, 0]`

.`init_cells`

: You can define your own initial cell data, a list of`[x, y, type, visited]`

s.`visited`

means the cell is visited or not. A visited cell won't be visited when traveling the maze. If you don't provide`init_cells`

,`mz_square_cells`

will generate one automatically.`x_wrapping`

: Default to`false`

. If you want to wrap the maze in the x direction, set it to`true`

. The last column of cells will be adjacent to the first column of cells.`y_wrapping`

: Default to`false`

. If you want to wrap the maze in the y direction, set it to`true`

. The last row of cells will be adjacent to the first row of cells.`seed`

: The maze is traveling randomly. Use`seed`

to initialize the pseudorandom number generator.

## Examples

```
use <maze/mz_square_cells.scad>;
use <line2d.scad>;
rows = 10;
columns = 10;
cell_width = 5;
wall_thickness = 2;
NO_WALL = 0;
TOP_WALL = 1;
RIGHT_WALL = 2;
TOP_RIGHT_WALL = 3;
MASK = 4;
cells = mz_square_cells(rows, columns);
for(cell = cells) {
type = cell[2];
translate([cell.x, cell.y] * cell_width) {
if(type == TOP_WALL || type == TOP_RIGHT_WALL) {
line2d([0, cell_width], [cell_width, cell_width], wall_thickness);
}
if(type == RIGHT_WALL || type == TOP_RIGHT_WALL) {
line2d([cell_width, cell_width], [cell_width, 0], wall_thickness);
}
}
}
line2d([0, 0], [cell_width * columns, 0], wall_thickness);
line2d([0, 0], [0, cell_width * rows], wall_thickness);
```