Rainbow Game of Life
An implementation of Conway’s Game of Life,
with rainbow cells.
There are three tests included,
as well as a large number of pre-drawn cell patterns available through calling the functions
in the cells namespace at the bottom of the file.
enum StillLife {
Block,
Beehive,
Loaf,
Boat,
Tub
}
enum Oscillator {
Blinker,
Toad,
Beacon,
Pulsar,
Pentadecathlon
}
enum Motion {
Glider,
LightWeight,
Gospers,
Simkins,
SimkinsDouble,
Engine,
BlockLayer
}
enum OddCell {
RPentomino,
DieHard,
Acorn
}
const width = screen.width;
const height = screen.height;
scene.setBackgroundImage(image.create(width, height));
// test1();
test2();
// test3();
function test1() {
cells.createRandom(4000);
}
function test2() {
for (let i = 0; i < 15; ++i) {
for (let j = 0; j < 6; ++j) {
cells.createOscillator(Oscillator.Pentadecathlon, 8 + 10 * i, 5 + 20 * j);
}
}
}
function test3() {
for (let i = 0; i < 5; ++i) {
cells.createMotion(Motion.Gospers, 15, 2 + i * 25);
}
}
// buffers[bufferNum][x][y] corresponds to whether the cell at location (x,y)
// was alive in the given buffer
let buffers: boolean[][][];
let currentBuffer: number;
init();
game.onUpdateInterval(100, nextGeneration);
// game.onUpdate(nextGeneration);
function countNeighbors(src: boolean[][], x: number, y: number): number {
const lX = x - 1; // left x
const rX = x + 1; // right x
const lY = y - 1; // left y
const rY = y + 1; // right y
let count = 0;
if (src[lX][lY])++count;
if (src[lX][y])++count;
if (src[lX][rY])++count;
if (src[x][lY])++count;
if (src[x][rY])++count;
if (src[rX][lY])++count;
if (src[rX][y])++count;
if (src[rX][rY])++count;
return count;
}
function nextGeneration() {
const lastGeneration = buffers[currentBuffer % 2];
const currGeneration = buffers[++currentBuffer % 2];
const bkgd = scene.backgroundImage();
// leave 1 pixel of unused edge on each side
// to avoid having to deal with oob checking
for (let x = 1; x < width - 1; ++x) {
for (let y = 1; y < height - 1; ++y) {
const neighbors = countNeighbors(lastGeneration, x, y);
if (lastGeneration[x][y] && (neighbors < 2 || neighbors > 3)) {
// Previously alive cell has died due to under- or over-population
currGeneration[x][y] = false;
bkgd.setPixel(x, y, 0);
} else if (!lastGeneration[x][y] && neighbors == 3) {
// Previously empty location has new cell born
currGeneration[x][y] = true;
bkgd.setPixel(x, y, randint(1, 0xd));
} else {
// State is unchanged
currGeneration[x][y] = lastGeneration[x][y];
}
}
}
}
function init() {
const bkgd = scene.backgroundImage();
buffers = [[], []];
for (let x = 0; x < width; x++) {
buffers[0][x] = [];
buffers[1][x] = [];
for (let y = 0; y < height; y++) {
buffers[0][x][y] = bkgd.getPixel(x, y) != 0;
buffers[1][x][y] = false;
}
}
currentBuffer = 0;
// Draw a border around screen, as those pixels are counted as 'not alive'
for (let x = 0; x < width; x++) {
buffers[0][x][0] = false;
buffers[0][x][height - 1] = false;
bkgd.setPixel(x, 0, 1);
bkgd.setPixel(x, height - 1, 1);
}
for (let y = 0; y < height; y++) {
buffers[0][0][y] = false;
buffers[0][width - 1][y] = false;
bkgd.setPixel(0, y, 1);
bkgd.setPixel(width - 1, y, 1);
}
}
namespace cells {
export function createStillLife(toDisplay: StillLife,
x: number,
y: number,
src?: Image) {
if (!src) src = scene.backgroundImage();
let display: Image;
switch (toDisplay) {
case StillLife.Block: {
display = img`
1 1
1 1
`
break;
}
case StillLife.Beehive: {
display = img`
. 1 1 .
1 . . 1
. 1 1 .
`
break;
}
case StillLife.Loaf: {
display = img`
. 1 1 .
1 . . 1
. 1 . 1
. . 1 .
`
break;
}
case StillLife.Boat: {
display = img`
1 1 .
1 . 1
. 1 .
`
break;
}
case StillLife.Block: {
display = img`
1 1
1 1
`
break;
}
case StillLife.Tub: {
display = img`
. 1 .
1 . 1
. 1 .
`
break;
}
default: return;
}
src.drawImage(display, x, y);
}
export function createOscillator(toDisplay: Oscillator,
x: number,
y: number,
src?: Image) {
if (!src) src = scene.backgroundImage();
let display: Image;
switch (toDisplay) {
case Oscillator.Blinker: {
display = img`
1
1
1
`
break;
}
case Oscillator.Toad: {
display = img`
. 1 1 1
1 1 1 .
`
break;
}
case Oscillator.Beacon: {
display = img`
1 1 . .
1 1 . .
. . 1 1
. . 1 1
`
break;
}
case Oscillator.Pulsar: {
display = img`
. . . . 1 . . . . . 1 . . . .
. . . . 1 . . . . . 1 . . . .
. . . . 1 1 . . . 1 1 . . . .
. . . . . . . . . . . . . . .
1 1 1 . . 1 1 . 1 1 . . 1 1 1
. . 1 . 1 . 1 . 1 . 1 . 1 . .
. . . . 1 1 . . . 1 1 . . . .
. . . . . . . . . . . . . . .
. . . . 1 1 . . . 1 1 . . . .
. . 1 . 1 . 1 . 1 . 1 . 1 . .
1 1 1 . . 1 1 . 1 1 . . 1 1 1
. . . . . . . . . . . . . . .
. . . . 1 1 . . . 1 1 . . . .
. . . . 1 . . . . . 1 . . . .
. . . . 1 . . . . . 1 . . . .
`
break;
}
case Oscillator.Pentadecathlon: {
display = img`
1 1 1
. 1 .
. 1 .
1 1 1
. . .
1 1 1
1 1 1
. . .
1 1 1
. 1 .
. 1 .
1 1 1
`
break;
}
default: return;
}
src.drawImage(display, x, y);
}
export function createMotion(toDisplay: Motion,
x: number,
y: number,
src?: Image) {
if (!src) src = scene.backgroundImage();
let display: Image;
switch (toDisplay) {
case Motion.Glider: {
display = img`
. 1 .
. . 1
1 1 1
`
break;
}
case Motion.LightWeight: {
display = img`
1 . . 1 .
. . . . 1
1 . . . 1
. 1 1 1 1
`
break;
}
case Motion.Gospers: {
display = img`
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . 1 1 . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . 1 1 1 . . . . . . . . . .
. . . . . . . . . 1 . . . . . . . . . . . . . . . 1 1 . 1 . . . . . 1 1
. . . . . . . 1 . 1 . . . . 1 1 1 . . . . . . . . 1 . . 1 . . . . . 1 1
1 1 . . . . 1 . 1 . . . . . . . . . . . . . . . . 1 1 . 1 . . . . . . .
1 1 . . . 1 . . 1 . . . . . . . 1 . . 1 1 . . 1 1 1 . . . . . . . . . .
. . . . . . 1 . 1 . . . . . . . 1 . . . 1 . . 1 1 . . . . . . . . . . .
. . . . . . . 1 . 1 . . . . . . 1 . . 1 . . . . . . . . . . . . . . . .
. . . . . . . . . 1 . . . . . . . . 1 1 . . . . . . . . . . . . . . . .
`;
break;
}
case Motion.Simkins: {
display = img`
1 1 . . . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . .
1 1 . . . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . 1 1 . 1 1 . . . . . .
. . . . . . . . . . . . . . . . . . . . . 1 . . . . . 1 . . . . .
. . . . . . . . . . . . . . . . . . . . . 1 . . . . . . 1 . . 1 1
. . . . . . . . . . . . . . . . . . . . . 1 1 1 . . . 1 . . . 1 1
. . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 1 1 . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . 1 1 1 . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . .
`
break;
}
case Motion.SimkinsDouble: {
display = img`
1 1 . . . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . .
1 1 . . . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 1 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . 1 1 . 1 1 . . . . . .
. . . . . . . . . . . . . . . . . . . . . 1 . . . . . 1 . . . . .
. . . . . . . . . . . . . . . . . . . . . 1 . . . . . . 1 . . 1 1
. . . . . . . . . . . . . . . . . . . . . 1 1 1 . . . 1 . . . 1 1
. . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . .
`
break;
}
case Motion.Engine: {
display = img`
1 1 1 1 1 1 1 1 . 1 1 1 1 1 . . . 1 1 1 . . . . . . 1 1 1 1 1 1 1 . 1 1 1 1 1
`
break;
}
case Motion.BlockLayer: {
display = img`
1 1 1 . 1
1 . . . .
. . . 1 1
. 1 1 . 1
1 . 1 . 1
`
break;
}
default: return;
}
src.drawImage(display, x, y);
}
export function createOddCell(toDisplay: OddCell,
x: number,
y: number,
src?: Image) {
if (!src) src = scene.backgroundImage();
let display: Image;
switch (toDisplay) {
case OddCell.RPentomino: {
display = img`
. 1 1
1 1 .
. 1 .
`
break;
}
case OddCell.DieHard: {
display = img`
. . . . . . 1 .
. . . . . . . .
1 1 . . . . 1 .
. 1 . . . 1 1 1
`
break;
}
case OddCell.Acorn: {
display = img`
. 1 . . . . .
. . . 1 . . .
1 1 . . 1 1 1
`;
break;
}
default: return;
}
src.drawImage(display, x, y);
}
export function createRandom(count: number, src?: Image) {
if (!src) src = scene.backgroundImage();
for (let i = 0; i < count; ++i)
src.setPixel(randint(0, width), randint(0, height), 1);
}
}