dataset-processing/readJSON.m at master · 2dshapesstructure/dataset-processing · GitHub

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% Read JSON files that contain points and triangles describing the shapes
function shape = readJSON(path)

    fileID = fopen(path,'r');

    % 1e ligne : {"points":[
    a = fgets(fileID);

    a = fgets(fileID);


    points = [];
    % Go through the points
    while (isempty(strfind(a,'triangles')))
        % Get x
        x = str2double(a(10:end-2));

        a = fgets(fileID);
        % Get y
        if a(end-2)==']'
            y = str2double(a(10:end-4));
        else
            y = str2double(a(10:end-3));
        end
        points = [points ; x y];

        a = fgets(fileID);
    end


    a = fgets(fileID);

    triangles = [];
    % Go through the triangles
    while (a(1)~='}')
        % Get p1
        p1 = str2double(a(11:end-2));
        a = fgets(fileID);
        % Get p2
        p2 = str2double(a(11:end-2));


        a = fgets(fileID);
        % Get p3
        if a(end-2)==']'
            p3 = str2double(a(11:end-4));
        else
            p3 = str2double(a(11:end-3));
        end

        triangles = [triangles ; p1 p2 p3];

        a = fgets(fileID);
    end
    triangles = triangles + 1;

    fclose(fileID);

    shape.points = points;
    shape.triangles = triangles;

end