The Sample Index node retrieves values from a source geometry at a specific index.
If the Geometry used for the input is the same as the geometry from the field context, this node is equivalent to the 在编号处评估. Using that node is usually preferable since avoiding the geometry socket makes the whole setup easier to use in other situations and share.
Different components can have same attribute domain (Points). This node simply uses first component that not empty for such domain, checked in the order of: Mesh, Point Cloud, Curve. The 分离元素 can be used to sample directly from a specific component.
A field to evaluate on the source Geometry. The values are then retrieved from specific indices for the output.
Which index to use when retrieving the data from the input Value field. Any index can be connected, resulting in a "shuffling" of the values.
The data retrieved from the source Geometry input.