Measure
Measure geometry: bounding box, surface area, mesh volume, perimeter, and curvature.
What it does
Measure reads the bounds of a shape, a raster, a set of points, or a 3D mesh, and reports Center, Size, min and max corners, width, height, depth, aspect ratio, area, volume, diagonal, and rotation. For 3D meshes it also reports surface area, signed mesh volume, perimeter, and face and edge counts.
Given a collection (several shapes, or several instanced meshes), Mode chooses one combined box around everything (Union) or a separate set of measurements per element (Per Element). Space chooses the object's axis-aligned box in World, or its own untouched dimensions in Local, ignoring rotation.
When to use it
Driving a Fit node, or matching one object's size to another: wire Size or width and height out of Measure
Centring or aligning objects: read Center
Layout work needing aspect ratio, area, or diagonal from a shape
3D work needing surface area, volume, or topology counts (face and edge count) off a mesh
Bounds for each element of a collection individually: switch Mode to Per Element
| Parameter | Type | Default |
|---|---|---|
geometry | OneOf([Collection]) | — |
mode | String | "Union" |
space | String | "World" |
Gotchas
Mesh Volume is signed. It comes out negative when the mesh's normals face inward. A negative volume on a mesh you expect to be solid is a normal-facing problem, not a units problem.
Per Element mode changes every output's type from a single value to an array, one entry per element in the collection. If a downstream node expects a single number or vector, switch back to Union or pick a single array entry upstream.
Local space reports the object's own dimensions with scale applied but ignores rotation. Pair it with the Rotation output to know how the box is tilted in World space.
Face Count and Edge Count only mean something for 3D meshes. On 2D shapes they report the shape's own approximation, so use Surface Area and Perimeter for 2D measurement.
Worked example
Add a Measure node and wire your geometry (a shape, mesh, or point set) into Geometry.
Leave Mode on Union to get one bounding box for the whole input.
Read Size or Width/Height into a Fit node to match another object's dimensions.
Switch Space to Local if you need the object's own size regardless of its current rotation.
If your input is a collection and you need per-object numbers instead of one combined box, switch Mode to Per Element.