36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2015 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 SORT_ANGLES_H
|
|
#define SORT_ANGLES_H
|
|
|
|
#include "igl_inline.h"
|
|
#include <Eigen/Core>
|
|
|
|
namespace igl {
|
|
// Sort angles in ascending order in a numerically robust way.
|
|
//
|
|
// Instead of computing angles using atan2(y, x), sort directly on (y, x).
|
|
//
|
|
// Inputs:
|
|
// M: m by n matrix of scalars. (n >= 2). Assuming the first column of M
|
|
// contains values for y, and the second column is x. Using the rest
|
|
// of the columns as tie-breaker.
|
|
// R: an array of m indices. M.row(R[i]) contains the i-th smallest
|
|
// angle.
|
|
template<typename DerivedM, typename DerivedR>
|
|
IGL_INLINE void sort_angles(
|
|
const Eigen::PlainObjectBase<DerivedM>& M,
|
|
Eigen::PlainObjectBase<DerivedR>& R);
|
|
}
|
|
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
#include "sort_angles.cpp"
|
|
#endif
|
|
|
|
#endif
|