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