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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
#include <optional>
#include "BLI_index_mask.hh"
#include "BLI_span.hh"
struct Mesh;
/** \file
* \ingroup geo
*/
namespace blender::geometry {
/**
* Merge selected vertices into other selected vertices within the \a merge_distance. The merged
* indices favor speed over accuracy, since the results will depend on the order of the vertices.
*
* \returns #std::nullopt if the mesh should not be changed (no vertices are merged), in order to
* avoid copying the input. Otherwise returns the new mesh with merged geometry.
*/
std::optional<Mesh *> mesh_merge_by_distance_all(const Mesh &mesh,
IndexMask selection,
float merge_distance);
/**
* Merge selected vertices along edges to other selected vertices. Only vertices connected by edges
* are considered for merging.
*
* \returns #std::nullopt if the mesh should not be changed (no vertices are merged), in order to
* avoid copying the input. Otherwise returns the new mesh with merged geometry.
*/
std::optional<Mesh *> mesh_merge_by_distance_connected(const Mesh &mesh,
Span<bool> selection,
float merge_distance,
bool only_loose_edges);
} // namespace blender::geometry
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