# Geometry

| Recipe | Concepts |
|--------|----------|
| [Transformations, extrusions](geometry/transforms.md) | Geometry operations, unrolled GEO files |
| [Surface holes](geometry/holes.md) | Surface holes, annotations |
| [OpenCASCADE examples](./geometry/occ-demo.md) | `OpenCASCADE`, fillets, pipes, lofts |
| [STEP file manipulation](./geometry/step.md) | `OpenCASCADE`, `STEP`, model units |
| [Embed a point in a curve](geometry/embed-point.md) | `OpenCASCADE`, boolean operations |
