Function buildTerrainLookup

buildTerrainLookup(
definitions: TerrainDefinition[],
): Map<number, TerrainDefinition>
Builds a lookup Map from terrain index → TerrainDefinition. Geometry builders use this for O(1) color / road-color access.
Parameters
- definitions: TerrainDefinition[]
Returns Map<number, TerrainDefinition>
- Defined in geometry/TerrainTypes.ts:182