Dynamic Floor Plugin

Features

• Runtime floor placement — single-tile placement and area fill mode. Toggle between modes with the Shift key.
• Polygon-based procedural mesh — floor surfaces are triangulated from 2D polygons using the earcut algorithm via ProceduralMeshComponent.
• Node network boundary detection — walls or other boundaries are modelled as a connected graph of UBasicNode objects. The plugin detects enclosed areas automatically.
• Room-within-room nesting — inner and outer nesting depth is tracked, so rooms inside rooms are supported.
• Preview before commit — EnterPreviewMode / ExitPreviewMode writes to a preview state without touching the production polygon database.
• Material ID system — materials are assigned via integer IDs, not direct asset references. The SimpleMaterialManager Blueprint maps IDs to UMaterialInterface at runtime.
• FloorType layers — Default, Border, and Invisible logical layers that do not interfere with each other.
• Polygon boolean operations — UnionPolygons, DifferencePolygons, DoPolygonsIntersect, DoPolygonsStrictlyIntersect (powered by Clipper2).
• Save and load — UPolygonDatabaseSaveManager and UNodeSystemDefaultSaveManager. Custom save logic supported via INodeSystemSaveManagerInterface.
• Fully Blueprint-driven — all user-facing integration points are Blueprint interfaces. No C++ required.
• Example map included — DynamicFloorPlugin/Maps/Preview_DynamicFloorPlugin. Press Play to explore the full placement pipeline.

Requirements

No other external dependencies are required. The third-party libraries earcut (triangulation) and Clipper2 (polygon boolean operations) are bundled directly with the plugin.

Not supported

• ! Multiplayer / network replication — explicitly not supported.
• ! Mac — explicitly not supported (development or target platform).
• ! Automatic grid snapping — not built-in. Must be implemented in FindValidHitResult on the placement tool. See Grid & Snapping docs.

Compatibility