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78 lines
2.2 KiB
78 lines
2.2 KiB
1 year ago
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_READDMAT_H
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#define IGL_READDMAT_H
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#include "igl_inline.h"
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/// @file readDMAT.h
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///
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/// .dmat - dense matrices
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/// ======================
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///
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/// ------------------------------------------------------------------------
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///
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/// A .dmat file contains a dense matrix in column major order. It can contain ASCII or binary data. Note that it is uncompressed so binary only reduces the file size by 50%. But writing and reading binary is usually faster. In MATLAB, binary is almost 100x faster.
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///
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/// ASCII
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/// -----
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///
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/// The first line is a header containing:
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///
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/// [#cols] [#rows]
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///
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/// Then the coefficients are printed in column-major order separated by spaces.
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///
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/// Binary
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/// ------
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///
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/// Binary files will also contain the ascii header, but it should read:
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///
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/// 0 0
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///
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/// Then there should be another header containing the size of the binary part:
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///
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/// [#cols] [#rows]
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///
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/// Then coefficients are written in column-major order in Little-endian 8-byte double precision IEEE floating point format.
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///
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/// **Note:** Line endings must be `'\n'` aka `char(10)` aka line feeds.
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///
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/// #### Example:
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///
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/// The matrix m = [1 2 3; 4 5 6];
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///
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/// corresponds to a .dmat file containing:
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///
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/// 3 2
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/// 1 4 2 5 3 6
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#include <string>
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#include <vector>
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#include <Eigen/Core>
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namespace igl
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{
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/// Read a matrix from an .dmat file
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///
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/// @param[in] file_name path to .dmat file
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/// @param[out] W eigen matrix containing read-in coefficients
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/// @return true on success, false on error
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///
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template <typename DerivedW>
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IGL_INLINE bool readDMAT(const std::string file_name,
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Eigen::PlainObjectBase<DerivedW> & W);
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/// \overload
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template <typename Scalar>
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IGL_INLINE bool readDMAT(
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const std::string file_name,
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std::vector<std::vector<Scalar> > & W);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "readDMAT.cpp"
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#endif
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#endif
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