49 lines
2.1 KiB
C++
49 lines
2.1 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2018 Francis Williams <francis@fwilliams.info>
|
|
//
|
|
// 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_SPARSE_VOXEL_GRID_H
|
|
#define IGL_SPARSE_VOXEL_GRID_H
|
|
|
|
#include "igl_inline.h"
|
|
|
|
#include <Eigen/Core>
|
|
|
|
namespace igl {
|
|
|
|
// sparse_voxel_grid( p0, scalarFunc, eps, CV, CS, CI )
|
|
//
|
|
// Given a point, p0, on an isosurface, construct a shell of epsilon sized cubes surrounding the surface.
|
|
// These cubes can be used as the input to marching cubes.
|
|
//
|
|
// Input:
|
|
// p0 A 3D point on the isosurface surface defined by scalarFunc(x) = 0
|
|
// scalarFunc A scalar function from R^3 to R -- points which map to 0 lie
|
|
// on the surface, points which are negative lie inside the surface,
|
|
// and points which are positive lie outside the surface
|
|
// eps The edge length of the cubes surrounding the surface
|
|
// expected_number_of_cubes This pre-allocates internal data structures to speed things up
|
|
// Output:
|
|
// CS #cube-vertices by 1 list of scalar values at the cube vertices
|
|
// CV #cube-vertices by 3 list of cube vertex positions
|
|
// CI #number of cubes by 8 list of indexes into CS and CV. Each row represents a cube
|
|
//
|
|
template <typename DerivedP0, typename Func, typename DerivedS, typename DerivedV, typename DerivedI>
|
|
IGL_INLINE void sparse_voxel_grid(const Eigen::MatrixBase<DerivedP0>& p0,
|
|
const Func& scalarFunc,
|
|
const double eps,
|
|
const int expected_number_of_cubes,
|
|
Eigen::PlainObjectBase<DerivedS>& CS,
|
|
Eigen::PlainObjectBase<DerivedV>& CV,
|
|
Eigen::PlainObjectBase<DerivedI>& CI);
|
|
|
|
}
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "sparse_voxel_grid.cpp"
|
|
#endif
|
|
|
|
#endif // IGL_SPARSE_VOXEL_GRID_H
|