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38 lines
1.0 KiB
38 lines
1.0 KiB
#pragma once
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#include <base/subface.hpp>
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namespace internal
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{
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// local: a sphere with center at (0, 0, 0) and radius 1
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// u: planar angle from x-axis to z-axis
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// v: polar angle from xz-plane to y-axis
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// EDIT: recap v from [-pi/2, pi/2] to [0, pi]
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struct sphere_face_t final : subface {
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};
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} // namespace internal
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namespace detail
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{
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// Q' = M^{-T}QM^{-1}
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// Q = {
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// 1, 0, 0, 0
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// 0, 1, 0, 0
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// 0, 0, 1, 0
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// 0, 0, 0, -1
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// }
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const Eigen::Vector4d sphere_std_diag{1, 1, 1, -1};
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template <>
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inline size_t hasher<internal::sphere_face_t>::operator()(const internal::sphere_face_t& subface) const
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{
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return hash_funcs(get_quadrics_character(sphere_std_diag, subface));
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}
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template <>
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inline bool eq_compare<internal::sphere_face_t>::operator()(const internal::sphere_face_t& lhs,
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const internal::sphere_face_t& rhs) const
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{
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return eq_funcs(get_quadrics_character(sphere_std_diag, lhs), get_quadrics_character(sphere_std_diag, rhs));
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}
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} // namespace detail
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