PrefabHammer

Prefab Hammer

Prefab Hammer is an advanced construction utility for Valheim. It allows players to capture custom build combinations (prefabs/blueprints) directly from their existing structures, name them, manage them in a catalog, and build them using standard resource calculations.

Features

• Manual and Area Capturing: Select pieces individually using precise green outlines, or fall back to a radius area save.
• Visual Multi-Row Requirements Grid: Clear, readable requirement display for complex prefabs and blueprints with enlarged icons, item names, and color-coded stock counts.
• Movable Requirements Display: Freely reposition the requirements panel via in-game drag (Shift + Drag) or custom X/Y configuration.
• In-Game Blueprint Trading: Swap saved custom structures directly with nearby players over the network.
• Inline Catalog Renaming: Organize and rename your custom prefabs dynamically within the Library Catalog.
• Stability Support Calculations: Custom designs automatically calculate structural integrity upon placement.
• Achievement & Lifetime Build Stats: Placing blueprints accurately credits every individual piece toward your character's building stats and achievements.
• Piece & Resource Origin Inspection: Color-coded origin tags ([Clean], [Cheated], [FreeBuild]) on crosshairs and item tooltips for placed pieces, loose ground drops, and containers.
• Clean FreeBuild Demolition: Automatically suppresses resource drops when dismantling FreeBuild structures to avoid inventory clutter.
• Undo History: Revert mistakes cleanly, automatically refunding construction materials at their original spots.
• Zero Alt-Tab Lag: Captures and places large structures in small background batches across frames to prevent freezes.
• Seamless MovingDay Compatibility: Shares the exact same selection pool in memory if the MovingDay mod is active.

Usage Guide

• Capturing and Saving a Blueprint
• Manual Selection: Equip the Hammer, look at any building piece, and press J to add it to your selection. Selected pieces highlight with a pulsating green overlay.
• Clearing Selection: Press Shift + J or Ctrl + J (or press J while aiming at empty air) to clear the active selection.
• Saving: Press K to open the Save Dialog. Enter a name for your custom prefab and click Save Combo.
• Area/Radius Fallback: If you open the Save Dialog (press K) without selecting any pieces first, the mod automatically captures all pieces within a radius of the targeted crosshair.
• Managing the Library Catalog
• Opening the Catalog: Press Delete or Shift + K to open the Prefab Manager directly to the Library Catalog tab.
• Renaming a Blueprint: In the Library Catalog list, click Rename next to any blueprint. Type the new name and click Save to update the template file and menu instantly.
• Deleting a Blueprint: Click Delete next to any blueprint, and click Confirm? to permanently delete the blueprint.
• Building and Requirements Display
• Placing a Blueprint: Open your hammer build menu, navigate to the Prefab tab, select your saved blueprint, and build it like a normal piece.
• Visual Requirements Grid: Complex prefabs display all required materials in a clean, multi-row grid of badges. Automatically integrates with chest-crafting mods (ValheimPlus, CraftFromContainers, AzuCraftyBoxes) to reflect combined materials across your bags and nearby chests:
• Green line (e.g. 892 / 1250): Requirements are satisfied (you have 1,250 available out of 892 needed, or free build is active).
• Red line (e.g. 892 / 14 or 892 / 0): Requirements are missing (you need 892, but only have 14 or 0 available).
• Repositioning the Requirements Display:
• Hold Shift (or your configured drag key) and Left-Click Drag anywhere on the requirements display to move it freely on your screen.
• Releasing the mouse button automatically saves the position to your config file.

Batched Construction: Large blueprints build automatically over multiple frames to prevent game freezing. A progress m