Blender's stock `Object > Set Origin` covers three modes. Production work — game

asset prep, hinge mechanics, multi-island meshes — needs more. Pro Origin Tools

adds four production-grade origin modes, a one-click Hinge tool for Edit Mode,

a pie menu, full N-panel UI, and a headless `bpy.ops` API for pipeline scripts.

1. Download `pro_origin_tools-1.0.0.zip`.

2. In Blender: `Edit > Preferences > Get Extensions > ▾ menu (top-right) > Install from Disk`.

3. Select the ZIP. The addon appears as **Pro Origin Tools** in the add-ons list.

Compatible with Blender 4.2 LTS through 5.1 (March 2026 stable). Pure Python,

no compiled binaries, no external dependencies.

| Surface | How to open |

|---|---|

| N-panel | 3D Viewport > press `N` > tab **Tool** > panel **Pro Origin** |

| Pie menu | 3D Viewport > `Ctrl + Alt + Right-Click` (hotkey rebindable) |

| Edit-Mode hinge button | N-panel > **Hinge Tool (Edit Mode)** box |

| Headless API | `bpy.ops.object.pro_origin_set('EXEC_DEFAULT', mode=...)` |

Run on the active mesh, or batch over the entire selection (each object processed

independently). Non-mesh objects in the selection are skipped automatically.

| Mode | Behaviour | When to use |

|---|---|---|

| **Smart Ground** | Bounding-box centre on X and Y; lowest *vertex* Z (vertex-exact, world-space). | Game-asset prep — props that need to sit flush on the ground. The most common case. |

| **Geometry Center** | Median of all geometry. Delegates to Blender's `ORIGIN_GEOMETRY`. | When the median centre is the right answer. |

| **Lowest Surface** | True median of the lowest-Z face. Detects mesh islands and prompts when more than one island reaches the global low. | Multi-leg furniture, multi-part assets, anything where each island's *foot* matters. |

| **Highest Surface** | Same as Lowest Surface, mirrored to the top. | Stacking, lid pivots, ceiling-mounted props. |

`Lowest Surface` and `Highest Surface` detect disconnected mesh components in a

single object. A chair with four separate legs joined as one mesh resolves to

four candidate origins. A modal dialog asks how you want to combine them:

- **Overall Center** — mean of all qualifying island origins.

- **Closest to 3D Cursor** — pick the island whose origin is nearest the 3D cursor.

This is the headline feature: stock Blender collapses a multi-island mesh to a

single bounding-box centre. Pro Origin Tools preserves the island structure and

lets you choose.

`Origin to Selection (Hinge)` — moves the active object's origin to a selection

made in Edit Mode, without touching geometry. Three modes:

| Selection | Resulting origin |

|---|---|

| 1 vertex | At that vertex's world position |

| 1 face | At that face's median |

| 2 or more verts (or multi-face fallback) | At the median of all selected verts |

Designed for door / lid / mechanical-part workflows where you want the object to

rotate around a specific edge or face, not its bbox centre. In Object Mode the

button is greyed out with a "Switch to Edit Mode to use" hint.

`Ctrl + Alt + Right-Click` opens a five-item pie:

| Position | Mode |

|---|---|

| West | Smart Ground |

| East | Geometry Center |

| South | Lowest Surface |

| North | Highest Surface |

| South-West | Origin to Selection (Hinge) |

Rebind the hotkey in `Edit > Preferences > Keymap > 3D View > Window > Call Menu`

(search for `OBJECT_MT_pro_origin_pie`).

Every mode is exposed as a callable operator. No UI dependency — drop straight

into render-farm prep, CI, or batch asset-ingest scripts.

```python

import bpy

bpy.ops.object.pro_origin_set('EXEC_DEFAULT', mode='SMART_GROUND')

bpy.context.window_manager.pro_origin_island_settings.choice = 'OVERALL'  # or 'CURSOR'

bpy.ops.object.pro_origin_set('EXEC_DEFAULT', mode='LOWEST_SURFACE')

```

The hinge tool is also callable while in Edit Mode:

```python

bpy.ops.object.pro_origin_to_hinge('INVOKE_DEFAULT')

```

- **Origin Rotation Alignment** — point origin axes at face normal / edge direction / world axes / cursor.

- **Edge-Midpoint Hinge** — select one edge, origin snaps to midpoint with rotation aligned to the edge.

- **Game Engine Presets** — one-click Unity / Unreal / Godot ground convention.

- **Modal Interactive Placement** — click any vertex / edge / face surface; origin snaps with visual feedback.

- Blender **4.2 LTS** through **5.1** (current stable, March 2026)

- Pure Python — works on Windows, macOS, Linux

- No external dependencies, no compiled binaries, no security flags

- Email: **[email protected]** — 48-hour response on business days.

- GitHub Issues: <https://github.com/billtruong003/pro-origin-tools/issues>

- Website: <https://www.billthedev.com>

Bug reports: please include Blender version, OS, and a minimal `.blend`

reproduction case if possible.

GPL-3.0-or-later. Source code is included in this ZIP. See [`LICENSE`](./LICENSE).

You're paying for convenience, lifetime updates, and direct support — not a code

lock. Redistribution of the unmodified ZIP outside of the original purchase is

discouraged but legally permitted under GPL §4.