The Change Attribute Domain node
When to use it
The fourth verb of the attribute model: the value is already on the mesh, but it is stored on the wrong thing. This node converts a named attribute between per-vertex and per-triangle storage.
Reach for it when a Wrangle refuses a cross-domain read (its error names this node), when a per-triangle value has to become a mask, or when a per-vertex mask has to become a per-face classification.
The averaging rule is the whole node. Vertex to triangle: each triangle combines its three corner values. Triangle to vertex: each vertex combines the triangles in its one ring. Same domain: a straight copy, and the rule is not consulted.
Combine Using is the setting people get wrong. Area weighting only does anything for triangle-to-vertex - going the other way all three corners belong to the same triangle and carry the same area, so area-weighted is identical to plain Average. Going triangle-to-vertex it matters a lot: on an irregular mesh a plain average lets a sliver triangle count as much as the large one beside it. And for ids or category indices, averaging is the wrong question entirely - Minimum and Maximum exist for that.
Pins
| Pin | Type | Description |
|---|---|---|
Mesh |
Mesh | The mesh carrying the value you want to convert. |
| Pin | Type | Description |
|---|---|---|
Mesh |
Mesh | The same mesh, now carrying the converted value. |
Settings
| Setting | Type | Description |
|---|---|---|
Attribute |
Text | Which stored value to convert. The dropdown lists what the incoming mesh carries, and its search box doubles as a text field while nothing is connected. |
Write To (empty = same name) |
Text | What the converted values get called. Leave it empty to replace the original in place, which is what you usually want. Give it a different name and you keep both. |
Convert To |
Choice | Whether the result ends up per vertex or per triangle. |
Combine Using |
Choice | How several values collapse into one. Area weighting only changes the answer going from triangles to vertices; the other way round it gives the same result as plain Average. |
Available in Mesh Morpher Graph and Mesh Morpher Studio.