[Geometry Nodes] blosm_init_data

[vvoovv]

Panel "Mark points for modification"

The points to be modified in the original geometry are marked here with the boolean attribute modify_point.

First, a boolean value for each point in the duplicated and merged geometry is calculated as follows. The value is set to True if:

• The attribute is_spline_endpoint (set before the geometry duplication and vertex merge) is equal to True.
  AND
• The point is internal after the geometry duplication and vertex merge, i.e. the number of its vertex neighbors is equal to 2.

Otherwise the value is set to False.

Then for each point in the original geometry where is_spline_endpoint is equal to True, the nearest point in the duplicated and merged geometry is found (the nodes Sample Nearest and Sample Index) and the value described above is set as the boolean attribute modify_point. For the rest of the points in the original geometry (where is_spline_endpoint is equal to False) the attribute modify_point is set False.

Panel "Store unit vector to the next point (2)"

A unit vector to the next point is calculated and store as the attribute unit_vector_next for the merged points. The condition to find those merged points is defined as follows:

• The attribute is_spline_endpoint (set before the geometry duplication and vertex merge) is equal to True.
  AND
• The point is internal after the geometry duplication and vertex merge, i.e. the number of its vertex neighbors is equal to 2.