% Copyright (c) 2022, ETH Zurich and UNC Chapel Hill.
% All rights reserved.
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% Redistribution and use in source and binary forms, with or without
% modification, are permitted provided that the following conditions are met:
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%     * Redistributions of source code must retain the above copyright
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%       documentation and/or other materials provided with the distribution.
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%       its contributors may be used to endorse or promote products derived
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% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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% Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)

function array = read_array(path, varargin)

if length(varargin) == 1
    dtype = varargin{1};
else
    dtype = 'single';
end

fid = fopen(path);

line = fscanf(fid, '%d&%d&%d&', [1, 3]);
width = line(1);
height = line(2);
channels = line(3);

num = width * height * channels;

array = fread(fid, num, dtype);
array = reshape(array, [width, height, channels]);
array = permute(array, [2 1 3]);
array = cast(array, dtype);

fclose(fid);

end