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class Grid { constructor() { this.grid = []; for (let i=0; i<cols; i++) { this.grid[i] = []; for (let j=0; j<rows; j++) { this.grid[i][j] = floor(random(2)); } } } display() { for (let i=0; i<cols; i++) { for (let j=0; j<rows; j++) { if (this.grid[i][j] == 0) { fill(255); } else { fill(0); } noStroke(); rect(i*size, j*size, size, size); } } } update() { let next = []; for (let i=0; i<cols; i++) { next[i] = []; for (let j=0; j<rows; j++) { let sum = this.checkNeighbors(i, j, this.grid); if (this.grid[i][j] == 1 && sum < 2) { next[i][j] = 0; } else if (this.grid[i][j] == 1 && (sum == 2 || sum == 3)) { next[i][j] = 1; } else if (this.grid[i][j] == 1 && sum > 3) { next[i][j] = 0; } else if (this.grid[i][j] == 0 && sum == 3) { next[i][j] = 1; } else { next[i][j] = this.grid[i][j]; } if (this.grid[i][j] == 0) { fill(255); } else { fill(0); } noStroke(); rect(i*size, j*size, size, size); } } this.grid = next; } checkNeighbors(x, y) { let sum = 0; for (let i=-1; i<2; i++) { for (let j=-1; j<2; j++) { sum += this.grid[(x+i+cols)%cols][(y+j+rows)%rows]; } } sum -= this.grid[x][y]; return sum; } resetCanvas() { for (let i=0; i<cols; i++) { this.grid[i] = []; for (let j=0; j<rows; j++) { this.grid[i][j] = 0; } } } drawGrid(x, y) { let margin = 2; for (let i=-margin; i<margin; i++) { for (let j=-margin; j<margin; j++) { this.grid[x + i][y + j] = 1; } } } randGrid() { for (let i=0; i<cols; i++) { this.grid[i] = []; for (let j=0; j<rows; j++) { this.grid[i][j] = floor(random(2)); } } } }