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Game of Life

An infinite evolving 2D grid of cells. Grid changes based on evolution rules. View documentation here

Running the .jar

There is an executable version in the app folder. This can be launched from the command line: java -jar GameOfLife.jar

If the command is followed by a non-negative integer it will use the argument as the number of cells to seed the grid with e.g. java -jar GameOfLife.jar 12 will seed the grid with 12 live cells. If something other than a non-negative integer is used then the grid is seeded with a default number (3).

Decisions

  • Cells are all next to each other when initially seeded while leaving a blank edge so that cell creation can be determined.
  • If a cell is created on the edge of grid then the grid expands so that the edge of grid is always blank tiles. For example if a cell is created at coordinates (0,0) the grid creates a new rows and columns so that what was at (0, 0) is now at (1, 1). This ensures grid can be 'infinite' in its growth.
  • Initially I stored the grid in a 2D array but to achieve a dynamic structure for grid that could grow when needed and satisfy 'infinite' quality I changed to using ArrayList.
  • Scenarios that determine tile's state in next iteration are stored in Enum items so that new scenarios could be easily added.

Built with

Example

When a grid is seeded with 3 cells:

Grid seeded with three cells

When the 'Next Iteration' button is pressed:

Grid seeded with three cells on second iteration

When the 'Next Iteration' button is pressed for a second time:

Grid seeded with three cells

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2D grid of cells

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