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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#ifndef IGL_CAT_H
#define IGL_CAT_H
#include "igl_inline.h"
#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
#include <Eigen/Sparse>
#include <Eigen/Dense>
namespace igl
{
// If you're using Dense matrices you might be better off using the << operator
// This is an attempt to act like matlab's cat function.
// Perform concatenation of a two matrices along a single dimension
// If dim == 1, then C = [A;B]. If dim == 2 then C = [A B]
//
// Template:
// Scalar scalar data type for sparse matrices like double or int
// Mat matrix type for all matrices (e.g. MatrixXd, SparseMatrix)
// MatC matrix type for output matrix (e.g. MatrixXd) needs to support
// resize
// Inputs:
// A first input matrix
// B second input matrix
// dim dimension along which to concatenate, 1 or 2
// Outputs:
// C output matrix
//
template <typename Scalar>
IGL_INLINE void cat(
const int dim,
const Eigen::SparseMatrix<Scalar> & A,
const Eigen::SparseMatrix<Scalar> & B,
Eigen::SparseMatrix<Scalar> & C);
template <typename Derived, class MatC>
IGL_INLINE void cat(
const int dim,
const Eigen::MatrixBase<Derived> & A,
const Eigen::MatrixBase<Derived> & B,
MatC & C);
// Wrapper that returns C
template <class Mat>
IGL_INLINE Mat cat(const int dim, const Mat & A, const Mat & B);
// Note: Maybe we can autogenerate a bunch of overloads D = cat(int,A,B,C),
// E = cat(int,A,B,C,D), etc.
// Concatenate a "matrix" of blocks
// C = [A0;A1;A2;...;An] where Ai = [A[i][0] A[i][1] ... A[i][m]];
//
// Inputs:
// A a matrix (vector of row vectors)
// Output:
// C
template <class Mat>
IGL_INLINE void cat(const std::vector<std::vector< Mat > > & A, Mat & C);
}
#ifndef IGL_STATIC_LIBRARY
# include "cat.cpp"
#endif
#endif
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