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54 lines
2.1 KiB
54 lines
2.1 KiB
#pragma once
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#include <array>
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#include <macros.h>
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#include <container/stl_alias.hpp>
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/**
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* A plane is defined by the barycentric plane equation:
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* f0 * b0 + f1 * b1 + f2 * b2 + f3 * b3 = 0 // For 3D
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* where the b's are the barycentric variables, and f's are the
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* plane equation coefficients. We store the f's for each plane.
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*/
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using plane_t = std::array<double, 4>;
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/**
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* A point is represented as the intersection of planes. We store the index
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* of the plane here.
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*/
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using point_t = std::array<uint32_t, 3>;
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static constexpr uint32_t INVALID_INDEX = std::numeric_limits<uint32_t>::max();
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struct arrangement_t {
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/* vertex descriptor */
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stl_vector_mp<point_t> vertices{};
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/* face descriptor */
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struct face_descriptor {
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stl_vector_mp<uint32_t> vertices{}; ///< An ordered list of boundary vertices. The face is always oriented
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///< counterclockwise when viewed from the positive side of the supporting plane.
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uint32_t supporting_plane{INVALID_INDEX}; ///< Plane index of the supporting plane.
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uint32_t positive_cell{INVALID_INDEX}; ///< The cell index on the positive side of this face.
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uint32_t negative_cell{INVALID_INDEX}; ///< The cell index on the negative side of this face.
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};
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stl_vector_mp<face_descriptor> faces{}; ///< A set of boundary vertex indices in no particular order.
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/* cell descriptor */
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struct cell_descriptor {
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stl_vector_mp<uint32_t> faces{};
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};
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stl_vector_mp<cell_descriptor> cells{}; ///< A set of boundary face indices in no particular order.
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/* Note: the following structure is only non-empty if input planes contain duplicates. */
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stl_vector_mp<uint32_t> unique_plane_indices{};
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stl_vector_mp<stl_vector_mp<uint32_t>> unique_planes{};
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stl_vector_mp<bool> unique_plane_orientations{};
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};
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IA_API bool load_lut();
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IA_API void lut_print_test();
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IA_API arrangement_t compute_arrangement(const stl_vector_mp<plane_t>& planes);
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