Evaluate a model
evaluateRead-onlyIdempotent
Run a model through the real CSG kernel and report whether it BUILDS: watertight, triangle count, bounding size in mm. Call this before exporting — an empty result usually means boolean operands did not overlap the way you expected. Its warning is only a bounding-box sanity check (a sub-mm feature, or bigger than a typical bed); it does NOT look at overhangs or wall thickness, so a clean evaluate does not mean the part prints — run print_check for that, and measure for material. A node or op in your nodes that could not be built as sent is dropped or changed and named in treeWarnings — fix it and call again.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| scad | No | OpenSCAD source, as an alternative to `nodes` (supply exactly one). Interpreted by the same engine the editor’s .scad import uses; BOSL2/MCAD includes resolve. minkowski() and resize() are not supported here — use hull() or offset(). | |
| nodes | No | Parametric node tree. mm, Z-up, rotations in DEGREES (a rotation.* binding: radians). Read owlcad://schema/primitives for every primitive, modifier and generator and its parameter ranges (unknown params are dropped silently), and owlcad://schema/conventions for the placement arithmetic, which is where most models go wrong. | |
| projectId | No | Id of one of your saved projects, as an alternative to `nodes`/`scad` (supply exactly one). | |
| smoothness | No | Curve quality for shapes that left their segment count automatic. Defaults to "standard", which is the editor default — pass "high" to match a project authored at high smoothness, "draft" for a cheaper check. |