core.owner (procNode)

The primitive each vertex belongs to, and the vertex's place within that primitive.

Built from the expand kernel over the primitives' runs: primitive i owns the vcount vertices that start at vstart. Outputs owner (the primitive id of each vertex) and local_index (the vertex's position in its primitive's run). The building block under every promotion between vertices and primitives.

Inputs

• geometry (Geometry). The geometry whose vertices are owned.

Outputs

• owner: the primitive of each vertex.
• local_index: the vertex's place in its primitive's run.

Example

local grid = g.mesh.grid({ size = { x = 2, z = 2 }, cells = { x = 2, z = 2 } })
local owner = g.core.owner({ geometry = grid })

Each triangle owns three vertices: owner.owner holds 0, 0, 0, 1, 1, 1, ... and owner.local_index 0, 1, 2, 0, 1, 2, ...