Class

ExistingCellRule

Generated GDScript class reference for GridPlacement.ExistingCellRule.

Status: Current
Version: v6.3.0
Source updated: 2026-10-29
Generated on: 2026-10-29

6.3. These pages document the 6.3 release, where placeable is now entry (what changed) and PlacementOwner is deprecated (migration). Still on 6.2? Your version's guides ship inside the plugin itself, under addons/grid_placement/guides/; the 6.2 URLs on this site now redirect to this series.

Terrain rule: terrain can only be painted over cells that already have a tile, not into empty space.

Source: addons/grid_placement/placement/placement_rules/template_rules/existing_cell_rule.gd

Syntax

class ExistingCellRule extends TilePaintRule

Members

Name	Kind	Summary
`error_message`	Property	Message shown when the rule fails. `%s` is replaced with the cell.
`validate_cell`	Method