Selection
If you want to limit the effect of the Node to a selection on the geometry, select the type of selection to be taken into account here. There are options for using a Point, Edge or a Polygon selection.
Here you can, for example, use the name of a selection in quotation marks that you want to read out, e.g., "MySelection". Otherwise, the default entry will use an active selection on the geometry.
You can also use special keywords and logical operations here to create a new selection from scratch or a combination of already saved selections. The following keywords and operations can be used:
- Default: This term causes an active selection currently present on the geometry to be used. If no selection is active, all points will be used.
- odd: This term is used to select all elements that have an odd index number.
- even: This term is used to select all elements that have an even index number.
- all: This selects all elements of the selected type.
- hidden: Selects the hidden elements of the geometry.
- Name of a saved selection: If you enter the name of a saved selection in quotation marks, this selection will be read and used. To use a combination of a saved selection and another keyword or selection, use quotation marks with the selection name.
- Index numbers: You can also use index numbers directly, just as you are used to from the Index Array From String Node.
- Mathematical and logical operations: Mathematical or logical operations can be used to combine selections. Using the string odd – "center" for instance selects all odd elements and then subtracts the selection that has been stored by the name "center". You can use +, -, & (logical and), | (logical or) as well as a comma to combine multiple selections or index sequences.
Within the Node, the point positions and the Normals of the geometry are output one after the other, i.e., in one iteration. By activating this option, only the elements that are selected in the geometry or have been selected via the above Select settings are output. Edge and polygon selections are automatically converted into point selections. However, this conversion is not entirely trivial. The most reliable results are therefore obtained by using a point selection.
If you do not want to use any of the above options for using existing selections or selection schemes, you can also assign a manually created selection here, which you have configured using a Geometry Selection Node or an Index Array from String Node, for example.