AoC5b.m

clear; clc; close all;

input = fileread('inputAoC5.txt'); %input který nám dal AoC skopírovaný do .txt souboru
inputByLine = regexp(input, '\n', 'split'); %použiju delimiter \n pro rozdělení dat na jednotlivé řádky
data = regexp(inputByLine, '[,>-]', 'split');

map = zeros(10000);

for i = 1:length(data)
    x1 = str2double(data{i}(1))+1;
    y1 = str2double(data{i}(2))+1;
    x2 = str2double(data{i}(4))+1;
    y2 = str2double(data{i}(5))+1;

    if (x1 == x2)
                        if (x1 > x2)
                            temp = x2;
                            x2 = x1;
                            x1 = temp;
                        end
                        if (y1 > y2)
                            temp = y2;
                            y2 = y1;
                            y1 = temp;
                        end
        map(y1:y2, x1) = map(y1:y2, x1) + 1;
    elseif (y1 == y2)
                        if (x1 > x2)
                            temp = x2;
                            x2 = x1;
                            x1 = temp;
                        end
                        if (y1 > y2)
                            temp = y2;
                            y2 = y1;
                            y1 = temp;
                        end
        map(y1, x1:x2) = map(y1, x1:x2) + 1;
    elseif (x1 < x2 && y1 < y2)
        j = y1;
        for i = x1:x2
            map(j, i) = map(j, i) + 1;
            j = j + 1;
        end
    elseif (x1 < x2 && y1 > y2)
        j = y1;
        for i = x1:x2
            map(j, i) = map(j, i) + 1;
            j = j - 1;
        end
    elseif (x1 > x2 && y1 < y2)
        j = y1;
        for i = x1:-1:x2
            map(j, i) = map(j, i) + 1;
            j = j + 1;
        end
    elseif (x1 > x2 && y1 > y2)
        j = y1;
        for i = x1:-1:x2
            map(j, i) = map(j, i) + 1;
            j = j - 1;
        end
    end

end

sum(map(:) > 1)

%map(x, y) = map(x, y) + 1;
%str2double(data{1}(1)) %první x data