All experiments

Solid cross-sections

Cutaway explorer

Move a section plane through mechanical assemblies to expose solid cross-sections and internal parts.

JavaScript · Three.js · Solid cross-sections

View source on GitHub

Try it

All editing and processing stays in your browser.

Getting started

  1. Move the cutting plane through the assembly. Orange faces are newly constructed caps.
  2. Change the plane axis to reveal shafts, bearings, seals, and hollow passages.
  3. Explode the assembly or inspect it without the cut. Export the visible geometry as OBJ.

Made with this tool

Examples captured from the running editor.

Cutaway gearbox with orange cut faces, gears, bearing covers and separated hardware
A capped gearbox section
Sectioned optical lens with distinct internal glass elements and retaining rings
Through the lens barrel

Implementation and limits

Slice into a mechanical assembly, inspect the filled section, and separate its working parts.

  • Illustrative assemblies, not dimensioned manufacturing designs or working mechanical simulations.
  • Section area is summed across components; overlapping parts are not boolean-unioned.
  • CPU caps require closed manifold components. The included solids are tested; arbitrary CAD upload is not supported.

Explore the implementation, tests, and examples on GitHub