Cell in a Grid2. More...

Public Member Functions
boolean	is_free ()
	Can we enter this cell? More...

boolean	is_tunnel ()
	letters a-z denote entries to tunnels: e.g., all 'a' are connected More...

Public Attributes
char	value = '\000'
	the value that is displayed More...

int	color = Terminal.WHITE
	indexed color, see `Terminal` More...

double	d = Double.POSITIVE_INFINITY
	distance to source More...

double	f = Double.POSITIVE_INFINITY
	priority used by A* (distance + estimated distance to destination More...

int	p = -1
	index of parent cell More...

Detailed Description

Cell in a Grid2.

Cells have a char value that is displayed. In addition, cells with the following values can be accessed: white space, letters, and digits. Any other values will be interpreted as "obstacles".

The color attribute can be used for visualization and as a flag (e.g., cell was processed). Note: Whether color can be displayed depends on Terminal.

The remaining attributes are used during traversal (see lecture).

Definition at line 76 of file Grid2.java.

Member Function Documentation

◆ is_free()

boolean aud.example.grid.Grid2.Cell.is_free ( )

Can we enter this cell?

Definition at line 80 of file Grid2.java.

                             {
      return value=='\000' || value=='.' || value=='*' ||
        Character.isWhitespace(value) ||
        Character.isLetterOrDigit(value);
    }