blender::ed::transform::SnapCache_EditMesh Struct Reference

Inherits blender::ed::transform::SnapObjectContext::SnapCache.

Public Member Functions
bool	has_mesh_updated (const Mesh *mesh)
void	clear ()
	~SnapCache_EditMesh () override
Public Member Functions inherited from blender::ed::transform::SnapObjectContext::SnapCache
virtual	~SnapCache ()=default

Public Attributes
Mesh *	mesh
const Mesh *	mesh_ref
bke::MeshRuntime *	runtime_ref
bke::EditMeshData *	edit_data_ref

Detailed Description

Edit mesh snap cache.

Note

It's important there is only ever one object per SnapObjectContext that references this snap cache.

Otherwise freed memory access may occur:

• While the lookup uses the original object data, change-detection uses the evaluated object.
• A change causes the previously cached mesh (#SnapCache_EditMesh::mesh) to be freed.
• The cached mesh may be referenced by a snap "hit", so freeing it may crash when that mesh is later later accessed.

Furthermore, constantly re-creating cache is inefficient.

Resolve by only using this cache for objects in edit-mode, instead objects with edit-mode data. This works because only one objects-data may be in edit-mode at a time. See: #148788.

Definition at line 58 of file transform_snap_object_editmesh.cc.

Constructor & Destructor Documentation

~SnapCache_EditMesh()

blender::ed::transform::SnapCache_EditMesh::~SnapCache_EditMesh ( )

inlineoverride

Definition at line 86 of file transform_snap_object_editmesh.cc.

References clear().

Member Function Documentation

clear()

void blender::ed::transform::SnapCache_EditMesh::clear ( )

inline

Definition at line 78 of file transform_snap_object_editmesh.cc.

References BKE_id_free().

Referenced by blender::ed::transform::snap_object_data_editmesh_get(), and ~SnapCache_EditMesh().

has_mesh_updated()

bool blender::ed::transform::SnapCache_EditMesh::has_mesh_updated ( const Mesh * mesh )

inline

Definition at line 67 of file transform_snap_object_editmesh.cc.

References mesh.

Referenced by blender::ed::transform::snap_object_data_editmesh_get().

Member Data Documentation

edit_data_ref

bke::EditMeshData* blender::ed::transform::SnapCache_EditMesh::edit_data_ref

Definition at line 65 of file transform_snap_object_editmesh.cc.

Referenced by blender::ed::transform::snap_object_data_editmesh_get().

mesh

Mesh* blender::ed::transform::SnapCache_EditMesh::mesh

Definition at line 60 of file transform_snap_object_editmesh.cc.

Referenced by has_mesh_updated(), blender::ed::transform::snap_object_data_editmesh_get(), and blender::ed::transform::snap_object_editmesh().

mesh_ref

const Mesh* blender::ed::transform::SnapCache_EditMesh::mesh_ref

Definition at line 63 of file transform_snap_object_editmesh.cc.

Referenced by blender::ed::transform::snap_object_data_editmesh_get().

runtime_ref

bke::MeshRuntime* blender::ed::transform::SnapCache_EditMesh::runtime_ref

Definition at line 64 of file transform_snap_object_editmesh.cc.

Referenced by blender::ed::transform::snap_object_data_editmesh_get().

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The documentation for this struct was generated from the following file:

• transform_snap_object_editmesh.cc