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96 lines
3.4 KiB
96 lines
3.4 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Alec Jacobson <alecjacobson@gmail.com>
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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_AMBIENT_OCCLUSION_H
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#define IGL_AMBIENT_OCCLUSION_H
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#include "igl_inline.h"
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#include "AABB.h"
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#include <Eigen/Core>
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#include <functional>
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namespace igl
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{
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/// Compute ambient occlusion per given point using ray-mesh intersection
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/// function handle.
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///
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/// @param[in] shoot_ray function handle that outputs hits of a given ray against a
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/// mesh (embedded in function handles as captured variable/data)
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/// @param[in] P #P by 3 list of origin points
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/// @param[in] N #P by 3 list of origin normals
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/// @param[in] num_samples number of samples to use (e.g., 1000)
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/// @param[out] S #P list of ambient occlusion values between 1 (fully occluded) and
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/// 0 (not occluded)
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///
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template <
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typename DerivedP,
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typename DerivedN,
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typename DerivedS >
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IGL_INLINE void ambient_occlusion(
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const std::function<
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bool(
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const Eigen::Vector3f&,
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const Eigen::Vector3f&)
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> & shoot_ray,
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedN> & N,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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/// Compute ambient occlusion per given point for mesh (V,F) with precomputed
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/// AABB tree.
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///
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// @param[in] AABB axis-aligned bounding box hierarchy around (V,F)
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/// @param[in] V #V by 3 list of mesh vertex positions
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/// @param[in] F #F by 3 list of mesh face indices into V
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/// @param[in] P #P by 3 list of origin points
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/// @param[in] N #P by 3 list of origin normals
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/// @param[in] num_samples number of samples to use (e.g., 1000)
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/// @param[out] S #P list of ambient occlusion values between 1 (fully occluded) and
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/// 0 (not occluded)
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///
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template <
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typename DerivedV,
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int DIM,
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typename DerivedF,
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typename DerivedP,
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typename DerivedN,
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typename DerivedS >
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IGL_INLINE void ambient_occlusion(
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const igl::AABB<DerivedV,DIM> & aabb,
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedN> & N,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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/// Compute ambient occlusion per given point for mesh (V,F)
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///
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/// @param[in] V #V by 3 list of mesh vertex positions
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/// @param[in] F #F by 3 list of mesh face indices into V
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/// @param[in] P #P by 3 list of origin points
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/// @param[in] N #P by 3 list of origin normals
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/// @param[in] num_samples number of samples to use (e.g., 1000)
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/// @param[out] S #P list of ambient occlusion values between 1 (fully occluded) and
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/// 0 (not occluded)
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedP,
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typename DerivedN,
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typename DerivedS >
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IGL_INLINE void ambient_occlusion(
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedN> & N,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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};
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#ifndef IGL_STATIC_LIBRARY
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# include "ambient_occlusion.cpp"
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#endif
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#endif
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