A pack of HDALC (houdini indie / apprentice tools) helping on procedural modeling. Extensively using those on NeoGothic/Victorian architecture project.
I will add some more as I am going through my old scenes and cleaning things up.
Blast, Isolate or create Groupe based on faces pointing up or down.
Center any geo back to the origin of world. Can fit geo on top, bellow or in center of the grid.
Mix two geo plugged in input1 and input2 (must have same amount of points) either based on Bbox mask or custom attribute.
Create an ID attribute (float or vector) based on connectivity.
Delete points closer to the object plugged in second input.
Extract points/center of primitives. Either individual faces or by pieces.
Extract a grid on top, middle or center of input geometry.
Turn a face into a more complex geo. Ideal as a base to generate towers.
Group primitives contained by object plugged in second input.
Store a "height" detail attribute. Measure dimensions of an object in X, Y or Z.
Extract middle points of every edges.
Group unshared edges and dissolve the rest. Ideal to create profil geo for sweep operations.
Extrude one or several points.