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#include "gameoflife.h"
#include "cube.h"
#include "draw.h"
// Game of Life for the 4x4x4 and 8x8x8 led cube
// Original rules:
// live cells:
// fewer than two neighbour: die
// two or three neighbours: live
// more than three neighbours: die
// dead cells:
// exactly three live neighbours becomes alive
// This is 3d space, so the cell can have life on two more sides.
// We have to tweak the rules a bit to make it work:
// Create life in a dead cell if neighbours == 4
#define GOL_CREATE_MIN 4
#define GOL_CREATE_MAX 4
// Underpopulation
#define GOL_TERMINATE_LONELY 3
// Overpopulation
#define GOL_TERMINATE_CROWDED 5
#define GOL_X 8
#define GOL_Y 8
#define GOL_Z 8
#define GOL_WRAP 0
void gol_play (int iterations, int delay)
{
int i;
for (i = 0; i < iterations; i++)
{
LED_PORT ^= LED_GREEN;
gol_nextgen();
if (gol_count_changes() == 0)
return;
tmp2cube();
delay_ms(delay);
//led_red(1);
}
}
void gol_nextgen (void)
{
int x,y,z;
unsigned char neigh;
tmpfill(0x00);
for (x = 0; x < GOL_X; x++)
{
for (y = 0; y < GOL_Y; y++)
{
for (z = 0; z < GOL_Z; z++)
{
neigh = gol_count_neighbors(x, y, z);
// Current voxel is alive.
if (getvoxel(x,y,z) == 0x01)
{
if (neigh <= GOL_TERMINATE_LONELY)
{
tmpclrvoxel(x,y,z);
} else if(neigh >= GOL_TERMINATE_CROWDED)
{
tmpclrvoxel(x,y,z);
} else
{
tmpsetvoxel(x,y,z);
}
// Current voxel is dead.
} else
{
if (neigh >= GOL_CREATE_MIN && neigh <= GOL_CREATE_MAX)
tmpsetvoxel(x,y,z);
}
}
}
}
}
unsigned char gol_count_neighbors (int x, int y, int z)
{
int ix, iy, iz; // offset 1 in each direction in each dimension
int nx, ny, nz; // neighbours address.
unsigned char neigh = 0; // number of alive neighbours.
for (ix = -1; ix < 2; ix++)
{
for (iy = -1; iy < 2; iy++)
{
for (iz = -1; iz < 2; iz++)
{
// Your not your own neighbour, exclude 0,0,0, offset.
if ( !(ix == 0 && iy == 0 && iz == 0) )
{
if (GOL_WRAP == 0x01)
{
nx = (x+ix)%GOL_X;
ny = (y+iy)%GOL_Y;
nz = (z+iz)%GOL_Z;
} else
{
nx = x+ix;
ny = y+iy;
nz = z+iz;
}
if ( getvoxel(nx, ny, nz) )
neigh++;
}
}
}
}
return neigh;
}
int gol_count_changes (void)
{
int x,y;
int i = 0;
for (x = 0; x < GOL_X; x++)
{
for (y = 0; y < GOL_Y; y++)
{
if (fb[x][y] != cube[x][y])
i++;
}
}
return i;
}
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