42 lines
959 B
C++
42 lines
959 B
C++
/* SPDX-FileCopyrightText: 2024 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bke
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*/
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#pragma once
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#include "BLI_array_state.hh"
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#include "BLI_math_vector_types.hh"
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struct Mesh;
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namespace blender::bke {
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/**
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* Simplifies checking if the topology of a mesh before and after an operation is the same.
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*
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* It does so by remembering the topology of the mesh. In common cases, this can be done without
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* additional copies in constant time by using implicit-sharing.
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*/
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class MeshTopologyState {
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private:
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ArrayState<int2> edge_verts_;
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ArrayState<int> corner_verts_;
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ArrayState<int> corner_edges_;
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ArrayState<int> face_offset_indices_;
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public:
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MeshTopologyState(const Mesh &mesh);
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/**
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* True when the topology of the given mesh is the same as the topology of the mesh the
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* constructor was called with.
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*/
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bool same_topology_as(const Mesh &mesh) const;
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};
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} // namespace blender::bke
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