TerrainDemolishData

Specialized ManipulationData for the terrain DEMOLISH action. Carries the terrain name, cells to erase, target map, and cell count for demolish operations. Exposes a veto() hook that listeners can call from the PlacementState.pre_terrain_demolish callback to cancel the demolition. Lifecycle (5.1.0-P): try_demolish_terrain: status = STARTED emit pre_terrain_demolish(data) # listeners may call data.veto() if data.vetoed: status = CANCELED return erase_cells() emit post_terrain_demolish(data) emit post_terrain_removed(data) status = FINISHED

Source: addons/grid_placement/placement/terrain/terrain_demolish_data.gd

Syntax

class TerrainDemolishData extends ManipulationData

Members

Name	Kind	Summary
terrain_name	Property	The terrain name being demolished (e.g. "dungeon_floor"). Resolved from the TileSet at erase time.
cells	Property	The grid cells to erase.
target_map	Property	The TileMapLayer where the terrain will be erased.
cells_3d	Property	3D variant: the GridMap cells to erase. Populated instead of cells when the demolish targets a GridMap; build this shape with for_3d().
target_map_3d	Property	3D variant: the GridMap where the terrain will be erased.
build_cost	Property	BuildCost snapshot for the demolish — set by terrain_placement_service when the demolish is initiated, so refunder pool has a stable value at handler time. Null cost → no refund (legacy / no-cost terrains), per AGENTS.md non-blocking policy.
for_3d	Method
empty_2d	Property
data	Property
is_3d	Method
cell_count	Method