body.py

import pygame
import numpy as np
import random

class Grid():
    def __init__(self, width, height, scale, offset):
        self.scale = scale
        self.columns = int(height/scale)
        self.rows = int(width/scale)
        self.size = (self.rows, self.columns)
        self.grid_array = np.ndarray(shape=(self.size))
        self.offset = offset

    def random2d_array(self):
        for x in range(self.rows):
            for y in range(self.columns):
                self.grid_array[x][y] = random.randint(0,1)###WHY


    def Conway(self, off_color, on_color, surface):
        for x in range(self.rows):
            for y in range(self.columns):
                y_pos = y * self.scale
                x_pos = x * self.scale
                ###What does this do


                if self.grid_array[x][y] == 1:
                    pygame.draw.rect(surface, on_color, [x_pos, y_pos, self.scale-self.offset, self.scale-self.offset])
                else:
                    pygame.draw.rect(surface, off_color, [x_pos, y_pos, self.scale-self.offset, self.scale-self.offset])
        next = np.ndarray(shape=(self.size))
        for x in range(self.rows):
            for y in range(self.columns):
                state = self.grid_array[x][y]
                neighbours = self.get_neighbours(x, y)
                if state == 0 and neighbours == 3:
                    next[x][y] = 1
                elif state == 1 and (neighbours < 2 or neighbours > 3):
                    next[x][y] = 0
                else:
                    next[x][y] = state
        self.grid_array = next ####why all these things. explain why

    def get_neighbours(self, x, y):
        total = 0
        for n in range(-1,2):#why in range(-1,2)
            for m in range(-1,2):
                x_edge = (x+n+self.rows) % self.rows###Explain this please
                y_edge = (y+m+self.columns) % self.columns
                total += self.grid_array[x_edge][y_edge]

        total -= self.grid_array[x][y]
        return total