Attributes(属性)

An attribute is a generic term to describe data stored per-element in a geometry data-block. For example, every vertex can have an associated number or vector. Attributes can be altered by the nodes in the Attribute category, but also some other nodes can change the values of specific attributes.

注釈

Attribute data types are converted implicitly where possible, just like node sockets.

Attribute Sockets

The blue attribute sockets are just string sockets, used to define which attribute in the geometry to use. When a node part of the evaluated node tree (connected to the root group input and output), the string input allows you to search and choose existing attributes.

属性検索。

属性検索は、各属性に関するコンテキストをいくつか提供します。メニューの左側に、属性ドメインとそれに続く属性名が表示されます。メニューの右側に、属性のデータ型が表示されます。

属性ドメイン

All attributes have a domain and type associated with them. Knowing the domain of an attribute is important because it defines which parts of the geometry the attribute can affect. You can use the Spreadsheet Editor to determine the domains of attributes.

• Point domain attributes are associated with the vertices of the mesh or the points in a point cloud.

• Edge domain attributes are associated with the edges of the mesh.

• Face domain attributes are associated with the faces of the mesh.

• Face Corner domain attributes are associated with the corners of the faces of the mesh. An example is the UVMap attribute.

注釈

For point cloud objects, every attribute has the point domain.

ちなみに

Use the Attribute Convert node to change the domain and type of attributes.

組み込み属性

Built-in attributes always exist, and cannot be removed. Their data type and domain can not be changed.

Name(名前)	Type(タイプ)	Domain(ドメイン)	ノート
position	Vector(ベクトル)	Point(ポイント)	Built-in attribute describing vertex or point locations, in the modifier object's transform space. Any node that changes the location of points will adjust this attribute, like the Transform and Point Translate nodes.
radius	Float	Point(ポイント)	A built-in attribute on point cloud data created by the Point Distribute Node Used to set the size for the points in the viewport.
material_index	Integer(整数)	Face(面)	メッシュ内のすべての面のマテリアルスロットを指定するために使用されます。
crease	Float	Edge(辺)	Edge attribute used by the Subdivision Surface node and modifier. The values are limited to a range of 0 and 1.
normal	Vector(ベクトル)	Face(面)	Normal of a face. This is a bit different from the other builtin attributes in that it cannot be modified. It is automatically derived from the mesh. If this attribute is accessed on non-point domains, it might not be normalized, because it is interpolated from normals of neighboring faces.
shade_smooth	Boolean(ブーリアン)	Face(面)	Attribute determining if a face should have smooth shading enabled.

命名規則

These attributes do not exist by default, but are used implicitly by certain nodes. The data type of these attributes can be changed, just like any attribute besides the built-in attributes.

If the attributes don't exist yet, a default value is used, which can depend on the situation. For example, in the Point Instance Node, the default value for scale is a unit scale of (1, 1, 1), but the default value for new attributes in the "attribute" nodes is zero.

Name(名前)	Type(タイプ)	ノート
rotation	Vector(ベクトル)	Used in the Point Instance Node to control the rotation of instanced objects or collections. Adjusted by the Point Rotate Node and the Align Rotation to Vector Node.
scale	Vector(ベクトル)	Used in the Point Distribute Node to control the scale of instances. Adjusted by the Point Scale Node or other attribute nodes.
id	Integer(整数)	Created by the Point Distribute Node to provide stability when the shape of the input mesh changes. The values are large, with no order. The attribute values are used by nodes that generate randomness, like the Attribute Randomize Node.

カスタム属性

Vertex groups, UV maps and vertex colors are available as attributes in geometry nodes. They are referred to by their name. Naming collisions (e.g. a vertex group and a UV map with the same name) should be avoided. If there is a naming collision, only one of the attributes is accessible in geometry nodes.

他の名前の属性は、その名前を初めて使用するときにノードによって作成することもできます。

Join Geometry(ジオメトリ統合) のようなノードが使用されている場合、ジオメトリノードは必ずしも例えば頂点グループを生成するとは限らないことに注意してください 。同様に、頂点グループ属性のデータ型が最初の "Float" 型から変更された場合、その属性は頂点グループではなくなります。