mirror of
https://github.com/SoftFever/OrcaSlicer.git
synced 2025-10-30 20:21:12 -06:00
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2018 Gavin Barill <gavinpcb@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_KNN
|
|
#define IGL_KNN
|
|
#include "igl_inline.h"
|
|
#include <Eigen/Core>
|
|
#include <vector>
|
|
|
|
namespace igl
|
|
{
|
|
// Given a 3D set of points P, an whole number k, and an octree
|
|
// find the indicies of the k nearest neighbors for each point in P.
|
|
// Note that each point is its own neighbor.
|
|
//
|
|
// The octree data structures used in this function are intended to be the
|
|
// same ones output from igl::octree
|
|
//
|
|
// Inputs:
|
|
// P #P by 3 list of point locations
|
|
// k number of neighbors to find
|
|
// point_indices a vector of vectors, where the ith entry is a vector of
|
|
// the indices into P that are the ith octree cell's points
|
|
// CH #OctreeCells by 8, where the ith row is the indices of
|
|
// the ith octree cell's children
|
|
// CN #OctreeCells by 3, where the ith row is a 3d row vector
|
|
// representing the position of the ith cell's center
|
|
// W #OctreeCells, a vector where the ith entry is the width
|
|
// of the ith octree cell
|
|
// Outputs:
|
|
// I #P by k list of k-nearest-neighbor indices into P
|
|
template <typename DerivedP, typename KType, typename IndexType,
|
|
typename DerivedCH, typename DerivedCN, typename DerivedW,
|
|
typename DerivedI>
|
|
IGL_INLINE void knn(const Eigen::MatrixBase<DerivedP>& P,
|
|
const KType & k,
|
|
const std::vector<std::vector<IndexType> > & point_indices,
|
|
const Eigen::MatrixBase<DerivedCH>& CH,
|
|
const Eigen::MatrixBase<DerivedCN>& CN,
|
|
const Eigen::MatrixBase<DerivedW>& W,
|
|
Eigen::PlainObjectBase<DerivedI> & I);
|
|
}
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "knn.cpp"
|
|
#endif
|
|
#endif
|
|
|