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43 lines
1.1 KiB
43 lines
1.1 KiB
#pragma once
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#include <base/subface.hpp>
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#include <primitive_descriptor.h>
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namespace internal
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{
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// local: cone face x^2+y^2-z^2=0(z<=0)
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struct cone_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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template <>
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struct hasher<internal::cone_face_t> {
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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, 0
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// }
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size_t operator()(const internal::cone_face_t& subface) const
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{
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// build M^{-T}Q directly
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Eigen::Matrix4d mat = internal::empty_affine_matrix;
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const auto& M_inv_T = subface.world_to_local.matrix();
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mat.leftCols<2>() = M_inv_T.topRows<2>().transpose();
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mat.col(2) = -M_inv_T.row(2).transpose();
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auto res = mat * subface.world_to_local;
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return hash_funcs(res.matrix());
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}
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};
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template <>
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struct eq_compare<internal::cone_face_t> {
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bool operator()(const internal::cone_face_t& lhs, const internal::cone_face_t& rhs) const
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{
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return eq_funcs(lhs.local_to_world, rhs.local_to_world);
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}
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};
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} // namespace detail
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