Class TileContent

Triangle count, for the triangle budget + stats.

Approximate GPU byte cost, for the memory budget + stats.

Tile tree depth, for the tile-LOD debug view.

LOD cross-fade alpha, 0→1. A freshly loaded tile starts at 0 and ramps to 1 over the fade window as it's drawn as the (fine) frontier; the coarser tile it replaces is drawn beneath it until this reaches 1, so the swap dissolves instead of popping. Persists on the cached content across frames (see Tileset3D).

ECEF center of this tile's bounding volume, for locating it geographically (e.g. to clamp the content to terrain elevation). Undefined when unknown.

The floating-origin ECEF point the drawable matrices were baked against; used to re-shift them after the origin moves (origin shifting).

Snapshot of the whole floating-origin frame (origin + ENU basis) the drawables were baked against. When the frame is REORIENTED (RTC), the draw loop places this content with frame.rigidFromSnapshot(bakeFrame) instead of a translation, so the reorientation needn't re-bake it. Undefined → translation-only origin shifting via bakeOriginEcef (the basis never changed).

Raw glTF asset.copyright for this tile — Google Photorealistic ships a semicolon-separated list of the tile's data providers here. Undefined when the tile carries none. Tileset3D aggregates these across the visible tiles to build the on-screen attribution the Google Map Tiles Terms of Service require.

Per-feature property tables for this tile — the b3dm batch table (one table) or the glTF EXT_structural_metadata property tables (one or more). The data behind "click a building, read its name/height/type". Undefined when the content carries no metadata. Picking maps a cursor → feature id → featureTables[t].getAll(id).

CPU pick soup — world-space (bake-frame) positions + indices + per-vertex feature id — for ray-pick feature selection (pickFeature). Retained only when the tile is loaded pickable. The sample shifts the ray by this tile's origin-shift (its bakeOriginEcef) before calling, then looks the hit id up in featureTables. Undefined when not pickable / no feature ids.

Optional CPU triangle soup of this tile's geometry, in the SAME origin-relative world space as the drawables (baked against bakeOriginEcef), merged across all primitives. Present only when loaded with collision: true. An app builds a physics collider from it (positions + indices), origin-shifting by frame.worldFromEcefPoint(bakeOriginEcef) exactly like a drawable.

Point-cloud payload for .pnts tiles — a baked, origin-relative GPU point buffer (positions + colors). Drawn by GeoPointCloudFeature (the mesh drawables are empty for a point tile). Undefined for mesh content.

For a composite (.cmpt) tile: the inner tile contents it merged (their drawables / points are surfaced on this one). Destroying this destroys them instead of the (null) glTF / shared drawables.