OhMyGrid

Plant crops in donut and other non-square patterns in Valheim. Lay down a big onion ring, drop a smaller carrot donut concentric inside it, and stop fighting the rectangular grid. Also: mass-pick / mass-refuel with Shift+E.

Install: Thunderstore page (direct download OhMyGrid-1.0.2.zip). Use r2modman or Thunderstore Mod Manager to drop it into a Valheim profile.

Features

• Donut planting. While holding the cultivator with a seed selected, a ring of ghost previews shows around your chosen center. Left-click plants the whole donut in one go.
• Per-point validity. Each ghost turns red when its spot is invalid — blocked by rocks/plants, out of reach, or on uncultivated soil. Green ones are the only ones that get planted, charged, and counted.
• Cost + yield overlay centered at the top of the screen: shows the current plant, valid/total point count, total seed cost, and expected yield — all live as you tune the radii.
• Four center modes, cycled with F7 (top-left HUD toast on change):
  • Player — donut follows you.
  • Fixed — pins the donut at your current spot. Walk away, donut stays.
  • Cursor — donut follows where the cultivator ghost aims.
  • CursorSnap — like Cursor, but the center auto-snaps to the centroid of nearby existing plants. Perfect for concentric placement.
• Geometry toggle. F6 cycles Off → Donut → Off. In Off, the mod stays out of the way and you place one plant per click like vanilla.
• Shift+E mass-interact (hover-scoped, same-type only):
  • Hover a Pickable → harvest every Pickable of the same item type in range. Carrots don't sweep nearby strawberries.
  • Hover a Fireplace → fuel every Fireplace in range.
  • Hover a Smelter / Charcoal Kiln → feed every smelter in range.
• Persists across sessions. Center mode, geometry mode, radii, hotkeys, and toggles are all stored under cgaggino.OhMyGrid.cfg.

Default hotkeys

All hotkeys are configurable under [Hotkeys] in the config file.

Defaults: InnerRadius=2m, OuterRadius=6m, Spacing=1m, AutoSnapRadius=12m, MassInteract.Radius=5m. All editable in the cfg file (or via BepInEx ConfigurationManager if you have it installed).

Concentric donut workflow

1. Stand inside an existing donut of one crop (or anywhere if it's the first).
2. Tap F7 until the HUD shows Mode: CursorSnap.
3. Aim near the center — the donut snaps to the centroid of the existing plants automatically.
4. Bring [ until the outer radius matches the inside of the previous donut.
5. Swap seed type and left-click. The new ring lands concentric to the old one.

Building from source

You need a local Valheim install with BepInEx (the build references assembly_valheim.dll and friends; they're not redistributable):

$env:VALHEIM_INSTALL = "C:\Program Files (x86)\Steam\steamapps\common\Valheim"
dotnet restore
dotnet build -c Release

The output is bin/Release/OhMyGrid.dll. Drop it in your r2modman / Thunderstore Mod Manager profile under BepInEx/plugins/.

Known limitations

• Centroid snap is biased on asymmetric clusters. If the existing plants are a half-donut or irregular, the snapped center won't be the geometric center. A least-squares circle fit is on the roadmap.
• Plant.Awake NRE per clone. The placement ghost has no ZNetView and Plant.Awake dereferences it unconditionally. The exception is caught by Unity and the visual still renders correctly; HaveGrowSpace is validated against the source ghost (not the clones), so behavior is correct, but the log gets one NRE entry per donut clone created.
• Fixed-mode center doesn't persist across sessions. The center mode saves and reloads as Player on the next launch (no anchor to restore). Other modes restore exactly as you left them.

Planned (v1.1+)

• More geometries on the F6 cycle: square grid, hex grid, spiral, and a user-drawn polygon.
• Least-squares circle fit for CursorSnap so half/quarter donuts also resolve to the geometric center.
• Workaround for the Plant.Awake NRE (instantiate inactive → attach a dummy ZNetView → activate, or strip the Plant component before the first frame).
• Shift+E support for more interactables (Beehive, Cauldron, Workbench repair).
• A toggle to mass-fill a single Smelter / Fireplace with one press, not just one tick per press.
• Optional ground ring rendered at the AutoSnap centroid so the snap target is visually obvious before you click.

Compatibility

• Targets Valheim 1.0 (1.0.1+; 1.0.0 was built for 0.221.x and does not work on 1.0).
• BepInEx 5.x via denikson-BepInExPack_Valheim (5.4.2350+).
• Tested on Valheim 1.0.15 (network version 40) with BepInExPack 5.4.2350, Windows, 1.0.2 build — play session with BepInEx/LogOutput.log review: 0 exceptions, seed accounting exact (planted=18 … paidHere=17 paidByVanilla=1, 18 seeds in → 0 left), ghosts render green/red with the cost overlay, Shift+E feeds only the aimed kiln/smelter slot, F7 cycles all four center modes.

Known issues

• Valheim's own requirement panel (bottom of the build UI) still shows the cost of one plant while the donut is active; the mod's overlay at the top shows the real batch cost (Need: … × N (have M)) and that is what gets charged. Cosmetic; planned for 1.0.3.
• Client-only — no ServerSync. Use freely on dedicated/multiplayer servers without forcing other players to install.

Contributing / releasing

PRs welcome. The dev release workflow (version bump, zip build, Thunderstore upload via tcli) is documented in RELEASING.md.

License

MIT — see LICENSE.