field.normal

Each element's normal (Vec3). Wired, the point normals of geometry, computed from its primitives by core.normals.point when it carries none; unwired, the N point attribute of the domain the field is evaluated over.

Inputs

• geometry (Geometry, optional). Whose normals the field reads. A geometry carrying none has them computed from its primitives; the wired value is unchanged. Left unwired, the field reads the 'N' point attribute of the domain it is evaluated over.

Outputs

• field: a Vec3 field (unwired) or the geometry's Vec3 normal column (wired).

Example

local points = g.mesh.grid({ cells = { x = 1, z = 1 } })
local out = g.attribute.set({ geometry = points, name = "v", value = g.field.normal({ geometry = g.mesh.grid({ cells = { x = 1, z = 1 } }) }) })

Every point of the flat grid reads (0, 1, 0).