attribute.number

Number the elements of a class: a whole-number column holding start on the first element, start + 1 on the second, and so on, written under name. The number is stored with the element, so it stays with it when elements are dropped, reordered or duplicated around it.

Inputs

• geometry (Geometry). What is numbered. A copy carrying the column comes out.
• class (one of detail, edge, point, primitive, vertex). Default "point". Which elements are numbered.
• name (String). Default "". What the column is called. A name the class already carries is replaced. Empty is refused.
• start (Float). Default 0. The number of the first element.

Outputs

• geometry: the geometry with the Int column under name on class.

Example

local grid = g.mesh.grid({ size = { x = 2, z = 2 }, cells = { x = 2, z = 2 } })
local numbered = g.attribute.number({ geometry = grid, class = "primitive", name = "face", start = 1 })

The grid's eight primitives hold face 1 to 8.