private void updateNeighbourCounterAndStatusOnGridCell(
CellShape gridCell[][], int row, int column, CellStatus newCellStatus) {
// a) update neighbour counter of adyacent cells
CellShape cellNeighbour = null;
for (int neighbourRow = row - 1; neighbourRow <= row + 1; neighbourRow++) {
for (int neighbourColumn = column - 1; neighbourColumn <= column + 1; neighbourColumn++) {
if (!isCaseIncreasingSameCellLookingForNeighbours(
neighbourRow, neighbourColumn, row, column)
&& !isOutOfGrid(neighbourRow, neighbourColumn)) {
cellNeighbour = gridCell[neighbourRow][neighbourColumn];
cellNeighbour.neighboursNumber =
(newCellStatus == CellStatus.LIVE)
? cellNeighbour.neighboursNumber + 1
: cellNeighbour.neighboursNumber - 1;
}
}
}
// b) update new cell status
gridCell[row][column].status = newCellStatus;
}
@Override
protected Object clone() throws CloneNotSupportedException {
CellShape cellCloned = new CellShape(this.status);
cellCloned.neighboursNumber = this.neighboursNumber;
return cellCloned;
}
@Override
protected void onDraw(Canvas canvas) {
// draw all separator lines
Paint lineSeparator = new Paint();
lineSeparator.setColor(Color.WHITE);
// draw all alive cells
for (int row = 0; row < rowsTotal; row++) {
for (int column = 0; column < columnsTotal; column++) {
CellShape cell = gridCell[row][column];
if (cell.status == CellStatus.LIVE) {
canvas.save();
canvas.translate(column * widthFactor, row * heightFactor);
cell.draw(canvas);
canvas.restore();
}
if (DEBUG_MODE) {
canvas.save();
canvas.translate(column * widthFactor, row * heightFactor);
canvas.drawText(
new Integer(cell.neighboursNumber).toString(),
widthFactor / 2,
heightFactor - 10,
lineSeparator);
canvas.restore();
}
// TODO: only paint column separator once
canvas.drawLine(
widthFactor * column, 0, widthFactor * column, heightFactor * rowsTotal, lineSeparator);
}
canvas.drawLine(
0, heightFactor * row, widthFactor * columnsTotal, heightFactor * row, lineSeparator);
}
}
public void executeNextGeneration() {
boolean hasCellChanged = false;
CellShape[][] updatedGridCell = cloneGrid(gridCell);
for (int row = 0; row < rowsTotal; row++) {
for (int column = 0; column < columnsTotal; column++) {
CellShape cell = gridCell[row][column];
hasCellChanged = false;
if (cell.status == CellStatus.LIVE) {
if (cell.neighboursNumber < 2 || cell.neighboursNumber > 3) {
cell.status = CellStatus.DEAD;
hasCellChanged = true;
}
} else { // is a dead cell
if (cell.neighboursNumber == 3) {
cell.status = CellStatus.LIVE;
hasCellChanged = true;
}
}
if (hasCellChanged) {
updateNeighbourCounterAndStatusOnGridCell(updatedGridCell, row, column, cell.status);
}
}
}
gridCell = updatedGridCell;
invalidate();
}
