Inputs
Here you connect the geometry to the node where a new selection is to be created.
In this menu you select which element type is to be selected. You can choose between Points, Edges and Polygons.
You use these values to specify the starting point and the direction in which a selection is to be calculated. Edge Point A and Edge Point B do not necessarily have to correspond to the end points of an edge on a polygon. It is sufficient if there is a loop connection between the specified points via edges. The order of the indices does not matter either, because the selection is automatically calculated in both directions and ends only when a geometry border are reached or by achieving one of the termination conditions that you can define via the following options.
The use of Edge Point A and Edge Point B differs somewhat depending on the Type setting defined. This is illustrated in the images below.
The top image shows the edges used in this example that lie between points 29 and 30 on the sphere. The selection calculated for the Point and Edge elements follow this edge precisely, i.e., horizontally. In Use Polygon mode, the respective edge will be interpreted so that it lies between the polygons that should be selected. For this reason, the polygon selection runs vertically, as is shown in the image on the far right.
In our example, to generate a polygon selection that runs horizontally, a vertical edge hast to be selected, as shown below.
By defining a vertical edge (in this example between edge points 19 and 29) a polygon selection that runs vertically can be calculated.
The selection stops automatically as soon as an element that has already been selected is on the selection path. Existing selections are therefore retained in the geometry.
If a triangle or N-gon lies on the specified selection path, the selection is automatically stopped at this point. This option only works when selecting edges or points.
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If there is a point on the calculated selection path that is adjacent to more than four polygons, the selection stops automatically here. This is then the case, for example, at the poles of a sphere. This option is only evaluated for the selection of edges or points.