user: Describe DataTransferModifier(Modifier) from the Blender manual or Python API, including usage steps and snippets.

assistant: # DataTransferModifier(Modifier)

base classes — [`bpy_struct`](bpy.types.bpy_struct.html#bpy.types.bpy_struct "bpy.types.bpy_struct"), [`Modifier`](bpy.types.Modifier.html#bpy.types.Modifier "bpy.types.Modifier")

*class* bpy.types.DataTransferModifier(*Modifier*)
:   Modifier transferring some data from a source mesh

    data_types_edges
    :   Which edge data layers to transfer

        - `SHARP_EDGE`
          Sharp – Transfer sharp mark.
        - `SEAM`
          UV Seam – Transfer UV seam mark.
        - `CREASE`
          Crease – Transfer subdivision crease values.
        - `BEVEL_WEIGHT_EDGE`
          Bevel Weight – Transfer bevel weights.
        - `FREESTYLE_EDGE`
          Freestyle – Transfer Freestyle edge mark.

        Type:
        :   enum set in {`'SHARP_EDGE'`, `'SEAM'`, `'CREASE'`, `'BEVEL_WEIGHT_EDGE'`, `'FREESTYLE_EDGE'`}, default set()

    data_types_loops
    :   Which face corner data layers to transfer

        - `CUSTOM_NORMAL`
          Custom Normals – Transfer custom normals.
        - `COLOR_CORNER`
          Colors – Transfer color attributes.
        - `UV`
          UVs – Transfer UV layers.

        Type:
        :   enum set in {`'CUSTOM_NORMAL'`, `'COLOR_CORNER'`, `'UV'`}, default set()

    data_types_polys
    :   Which face data layers to transfer

        - `SMOOTH`
          Smooth – Transfer flat/smooth mark.
        - `FREESTYLE_FACE`
          Freestyle Mark – Transfer Freestyle face mark.

        Type:
        :   enum set in {`'SMOOTH'`, `'FREESTYLE_FACE'`}, default set()

    data_types_verts
    :   Which vertex data layers to transfer

        - `VGROUP_WEIGHTS`
          Vertex Groups – Transfer active or all vertex groups.
        - `BEVEL_WEIGHT_VERT`
          Bevel Weight – Transfer bevel weights.
        - `COLOR_VERTEX`
          Colors – Transfer color attributes.

        Type:
        :   enum set in {`'VGROUP_WEIGHTS'`, `'BEVEL_WEIGHT_VERT'`, `'COLOR_VERTEX'`}, default set()

    edge_mapping
    :   Method used to map source edges to destination ones

        Type:
        :   enum in [Dt Method Edge Items](bpy_types_enum_items/dt_method_edge_items.html#rna-enum-dt-method-edge-items), default `'NEAREST'`

    invert_vertex_group
    :   Invert vertex group influence

        Type:
        :   boolean, default False

    islands_precision
    :   Factor controlling precision of islands handling (typically, 0.1 should be enough, higher values can make things really slow)

        Type:
        :   float in [0, 1], default 0.0

    layers_uv_select_dst
    :   How to match source and destination layers

        Type:
        :   enum in [Dt Layers Select Dst Items](bpy_types_enum_items/dt_layers_select_dst_items.html#rna-enum-dt-layers-select-dst-items), default `'NAME'`

    layers_uv_select_src
    :   Which layers to transfer, in case of multi-layers types

        Type:
        :   enum in [Dt Layers Select Src Items](bpy_types_enum_items/dt_layers_select_src_items.html#rna-enum-dt-layers-select-src-items), default `'ALL'`

    layers_vcol_loop_select_dst
    :   How to match source and destination layers

        Type:
        :   enum in [Dt Layers Select Dst Items](bpy_types_enum_items/dt_layers_select_dst_items.html#rna-enum-dt-layers-select-dst-items), default `'NAME'`

    layers_vcol_loop_select_src
    :   Which layers to transfer, in case of multi-layers types

        Type:
        :   enum in [Dt Layers Select Src Items](bpy_types_enum_items/dt_layers_select_src_items.html#rna-enum-dt-layers-select-src-items), default `'ALL'`

    layers_vcol_vert_select_dst
    :   How to match source and destination layers

        Type:
        :   enum in [Dt Layers Select Dst Items](bpy_types_enum_items/dt_layers_select_dst_items.html#rna-enum-dt-layers-select-dst-items), default `'NAME'`

    layers_vcol_vert_select_src
    :   Which layers to transfer, in case of multi-layers types

        Type:
        :   enum in [Dt Layers Select Src Items](bpy_types_enum_items/dt_layers_select_src_items.html#rna-enum-dt-layers-select-src-items), default `'ALL'`

    layers_vgroup_select_dst
    :   How to match source and destination layers

        Type:
        :   enum in [Dt Layers Select Dst Items](bpy_types_enum_items/dt_layers_select_dst_items.html#rna-enum-dt-layers-select-dst-items), default `'NAME'`

    layers_vgroup_select_src
    :   Which layers to transfer, in case of multi-layers types

        Type:
        :   enum in [Dt Layers Select Src Items](bpy_types_enum_items/dt_layers_select_src_items.html#rna-enum-dt-layers-select-src-items), default `'ALL'`

    loop_mapping
    :   Method used to map source faces’ corners to destination ones

        Type:
        :   enum in [Dt Method Loop Items](bpy_types_enum_items/dt_method_loop_items.html#rna-enum-dt-method-loop-items), default `'NEAREST_POLYNOR'`

    max_distance
    :   Maximum allowed distance between source and destination element, for non-topology mappings

        Type:
        :   float in [0, inf], default 1.0

    mix_factor
    :   Factor to use when applying data to destination (exact behavior depends on mix mode, multiplied with weights from vertex group when defined)

        Type:
        :   float in [0, 1], default 0.0

    mix_mode
    :   How to affect destination elements with source values

        Type:
        :   enum in [Dt Mix Mode Items](bpy_types_enum_items/dt_mix_mode_items.html#rna-enum-dt-mix-mode-items), default `'REPLACE'`

    object
    :   Object to transfer data from

        Type:
        :   [`Object`](bpy.types.Object.html#bpy.types.Object "bpy.types.Object")

    poly_mapping
    :   Method used to map source faces to destination ones

        Type:
        :   enum in [Dt Method Poly Items](bpy_types_enum_items/dt_method_poly_items.html#rna-enum-dt-method-poly-items), default `'NEAREST'`

    ray_radius
    :   ‘Width’ of rays (especially useful when raycasting against vertices or edges)

        Type:
        :   float in [0, inf], default 0.0

    use_edge_data
    :   Enable edge data transfer

        Type:
        :   boolean, default False

    use_loop_data
    :   Enable face corner data transfer

        Type:
        :   boolean, default False

    use_max_distance
    :   Source elements must be closer than given distance from destination one

        Type:
        :   boolean, default False

    use_object_transform
    :   Evaluate source and destination meshes in global space

        Type:
        :   boolean, default True

    use_poly_data
    :   Enable face data transfer

        Type:
        :   boolean, default False

    use_vert_data
    :   Enable vertex data transfer

        Type:
        :   boolean, default False

    vert_mapping
    :   Method used to map source vertices to destination ones

        Type:
        :   enum in [Dt Method Vertex Items](bpy_types_enum_items/dt_method_vertex_items.html#rna-enum-dt-method-vertex-items), default `'NEAREST'`

    vertex_group
    :   Vertex group name for selecting the affected areas

        Type:
        :   string, default “”, (never None)

    *classmethod* bl_rna_get_subclass(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The RNA type or default when not found.

        Return type:
        :   [`bpy.types.Struct`](bpy.types.Struct.html#bpy.types.Struct "bpy.types.Struct") subclass

    *classmethod* bl_rna_get_subclass_py(*id*, *default=None*, */*)
    :   Parameters:
        :   **id** (*str*) – The RNA type identifier.

        Returns:
        :   The class or default when not found.

        Return type:
        :   type