public static int LiveNeighborCount( CellGrid input, int x, int y )
{
int count = 0;
foreach( int[] L in LOCALITY )
count += (Peek( input, x + L[1], y + L[0] ) != 0)? 1 : 0;
return count;
}
public static void ApplyRule( CellGrid input, CellGrid output, int x, int y )
{
int count = LiveNeighborCount( input, x, y );
int value = Peek( input, x, y );
if( value == 0 ) { // dead
switch( count ) {
// Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.
case 3: Poke( output, x, y, 1 ); break;
}
} else if( value == 1 ) { // alive
switch( count ) {
// Any live cell with fewer than two live neighbours dies, as if caused by under-population.
case 1: Poke( output, x, y, 0 ); break;
// Any live cell with two or three live neighbours lives on to the next generation.
case 2:
case 3: break;
// Any live cell with more than three live neighbours dies, as if by overcrowding.
case 4:
case 5:
case 6:
case 7:
case 8: Poke( output, x, y, 0 ); break;
}
}
}
public static void Step( CellGrid input, CellGrid output )
{
// assume output is same size as input
for( int iy = 0; iy < input.grid.GetLength(0); ++iy ) {
for( int ix = 0; ix < input.grid.GetLength(1); ++ix ) {
ApplyRule( input, output, ix, iy );
}
}
}
public static int Peek( CellGrid input, int x, int y )
{
if ( x < 0 || x > input.grid.GetLength(0) )
return 0; // off-grid: dead
else if( y < 0 || y > input.grid.GetLength(1) )
return 0; // off-grid: dead
else
return input.grid[ x, y ];
}
public static void print_CellGrid( CellGrid input )
{
// assume output is same size as input
System.Console.WriteLine("");
for( int iy = 0; iy < input.grid.GetLength(0); ++iy ) {
for( int ix = 0; ix < input.grid.GetLength(1); ++ix ) {
System.Console.Write( (input.grid[ ix, iy ] == 1)? "█" : " " );
}
System.Console.WriteLine("");
}
}
public static void Main()
{
var frame0 = new CellGrid();
frame0.grid = new int[20,20];
var frame1 = new CellGrid();
frame1.grid = new int[20,20];
frame0.grid[0,1] = 1;
frame0.grid[1,2] = 1;
frame0.grid[2,0] = 1;
frame0.grid[2,1] = 1;
frame0.grid[2,2] = 1;
print_CellGrid( frame0 );
for( var i = 0; i < 50; ++i ) {
var f = (i % 2 == 0)? frame0 : frame1;
var f_prime = (i % 2 == 0)? frame1 : frame0;
print_CellGrid( f_prime );
}
Console.ReadLine();
}
public static void Express( OrganismEncoding encoding, CellGrid grid, int origin_x, int origin_y, bool mirrored )
{
}
public static void Poke( CellGrid output, int x, int y, int value )
{
output.grid[ x, y ] = value;
}