116 lines
3.9 KiB
C#
116 lines
3.9 KiB
C#
using UnityEngine;
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namespace DefaultNamespace.GameOfLife
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{
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public class GameOfLife : MonoBehaviour
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{
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[SerializeField] private Cell _cellPrefab;
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[SerializeField, Range(5, 100)] private int _columns = 10;
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[SerializeField, Range(5, 100)] private int _rows = 10;
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private Cell[] _cells;
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private int CalculateIndex(int column, int row) => row * _columns + column;
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private void Start()
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{
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_cells = new Cell[_columns * _rows];
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for (int x = 0; x < _columns; x++)
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{
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for (int y = 0; y < _rows; y++)
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{
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Cell cell = Instantiate(_cellPrefab, transform);
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cell.gameObject.name = $"{x:000} / {y:000}";
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cell.transform.localPosition = new Vector3(x, y, 0);
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_cells[CalculateIndex(x, y)] = cell;
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}
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}
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}
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private void SimulateStep()
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{
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// collect new states
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bool[] newStates = new bool[_cells.Length];
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// change states - apply rules
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for (int x = 0; x < _columns; x++)
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{
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for (int y = 0; y < _rows; y++)
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{
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int index = CalculateIndex(x, y);
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bool cellState = _cells[index].IsAlive;
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int neighbors = CountNeighbors(x, y);
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if (cellState)
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{
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// cell is alive
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// rule 1: less than ywo neighbors => die
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if (neighbors < 2) cellState = false;
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// rule 2: two or three neighbors => stay alive
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if (neighbors is 2 or 3) cellState = true;
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// rule 3: more than three neighbors => die
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if (neighbors > 3) cellState = false;
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}
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else
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{
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// cell is dead
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// rule 4: exactly three neighbors => birth
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if (neighbors == 3) cellState = true;
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}
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newStates[index] = cellState;
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}
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}
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// apply new states
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for (int i = 0; i < _cells.Length; i++)
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{
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_cells[i].IsAlive = newStates[i];
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}
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}
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private int CountNeighbors(int column, int row)
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{
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int count = 0;
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for (int dx = -1; dx <= 1; dx++)
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{
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for (int dy = -1; dy <= 1; dy++)
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{
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// exception: own cell
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if (dx == 0 && dy == 0) continue;
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int currentColumn = column + dx;
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int currentRow = row + dy;
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// exception: borders
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if (currentColumn < 0 || currentColumn >= _columns) continue;
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if (currentRow < 0 || currentRow >= _rows) continue;
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if (_cells[CalculateIndex(currentColumn, currentRow)].IsAlive) count++;
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}
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}
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return count;
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}
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public void OnSimulateStepButtonClick() => SimulateStep();
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public void OnResetButtonClick()
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{
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for (int i = 0; i < _cells.Length; i++)
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{
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_cells[i].IsAlive = false;
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}
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CancelInvoke(nameof(SimulateStep));
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}
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public void OnStartSimulationButtonClick() => InvokeRepeating(nameof(SimulateStep), 0, 0.5f);
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public void OnStopSimulationButtonClick() => CancelInvoke(nameof(SimulateStep));
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}
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} |