Lost Lily/Grid ToolkitDocs 1.0
Table of Contents
IntermediateValidated 1.0.0

Build on a 1,000-cell board

What this teaches

This scene shows that a logical board does not need one visible GameObject per cell. It uses a 1,000-cell square GridBoardState, precise hit resolution, and retained structure visuals for a building workflow.

Open and run

Menu path: Tools > Lost Lily > Grid Toolkit > Samples > Open > Large Board Builder.

Enter Play Mode. Press 1–4 to select a building, R to rotate, D for demolish mode, and Escape to cancel. Use WASD to pan, the mouse wheel to zoom, and Q/E to rotate the camera.

Large Board Builder in Play Mode showing placed buildings, an active placement preview, the build palette, and board status.
The builder keeps 1,000 logical cells available while rendering only the structures and feedback needed by the player.

Try it

  1. Press 1 and place the first building on an open footprint.
  2. Press another number, rotate with R, and place a larger footprint.
  3. Pan, zoom, and rotate the camera while keeping the preview active.
  4. Try an overlapping or out-of-bounds placement and read the rejection.
  5. Press D, select a placed building to demolish, then press Escape.

Checkpoint

Valid clicks add structures; invalid previews do not mutate the board. Camera movement does not change logical coordinates or state. Demolish removes only the targeted structure. Reset restores the scene's starting board.

How it works

Scene part Public system Responsibility
Invisible board Square topology and state Owns 1,000 logical cells without requiring visible cell nodes.
Placement palette Project UI Chooses a structure definition and mode.
Preview/apply GridActionRunner Validates footprints and occupancy.
World 3D surface GridBoardView Converts pointer rays into board coordinates.
Structure renderer Retained visualization Creates and removes visible building nodes after commits.

Try another variation

In a duplicated scene, change a footprint, starting camera pose, or visible feedback while checking the same input sequence.

Troubleshooting

Symptom Fix
No preview appears. Select a building with 1–4 and point at the board plane.
Camera moves but clicks miss. Confirm the configured camera and World 3D hit surface references.

Next sample

Continue with Extend Grid Toolkit with a cubic topology.