computeNextGeneration.c

#include "includes.h"

//function to calculate the next generation
void computeNextGeneration(struct GameValues *value) {
    int i, j, alive;
    for (i = 0; i < ((value->size_y) + 1); i++) {
        for (j = 0; j < ((value->size_x) + 1); j++) {
            alive = 0;
            alive += value->gameMapBuffer[(i - 1 + (value->size_y)) % (value->size_y)][(j - 1 + (value->size_x)) %
                                                                                       (value->size_x)];
            alive += value->gameMapBuffer[(i - 1 + (value->size_y)) % (value->size_y)][j];
            alive += value->gameMapBuffer[(i - 1 + (value->size_y)) % (value->size_y)][(j + 1 + (value->size_x)) %
                                                                                       (value->size_x)];
            alive += value->gameMapBuffer[i][(j - 1 + (value->size_x)) % (value->size_x)];
            alive += value->gameMapBuffer[i][(j + 1 + (value->size_x)) % (value->size_x)];
            alive += value->gameMapBuffer[(i + 1 + (value->size_y)) % (value->size_y)][(j - 1 + (value->size_x)) %
                                                                                       (value->size_x)];
            alive += value->gameMapBuffer[(i + 1 + (value->size_y)) % (value->size_y)][j];
            alive += value->gameMapBuffer[(i + 1 + (value->size_y)) % (value->size_y)][(j + 1 + (value->size_x)) %
                                                                                       (value->size_x)];

            //check rules and write to gameMap
            if (value->gameMapBuffer[i][j] == 1 && (alive > 3 || alive < 2)) value->gameMap[i][j] = 0;
            if (value->gameMapBuffer[i][j] == 0 && alive == 3) value->gameMap[i][j] = 1;
        }
    }
    value->gen++;
    return;
}