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# Factorio Prototype Docs Version 2.0.77

# UnitSpawnDefinition - Prototype Docs

## UnitSpawnDefinition :: struct or {EntityID, array[SpawnPoint]}

It can be specified as a table with named or numbered keys, but not a mix of both. If this is specified as a table with numbered keys then the first value is the unit and the second is the spawn points.

## Properties

- default
- sorted

unit | :: EntityID |
spawn_points | :: array[SpawnPoint] | Array of evolution and probability info, with the following conditions: The `evolution_factor` must be ascending from entry to entry. The last entry's weight will be used when the `evolution_factor` is larger than the last entry. Weights are linearly interpolated between entries. Individual weights are scaled linearly so that the cumulative weight is `1`.
Array of evolution and probability info, with the following conditions: The `evolution_factor` must be ascending from entry to entry. The last entry's weight will be used when the `evolution_factor` is larger than the last entry. Weights are linearly interpolated between entries. Individual weights are scaled linearly so that the cumulative weight is `1`.

spawn_points | :: array[SpawnPoint] | Array of evolution and probability info, with the following conditions: The `evolution_factor` must be ascending from entry to entry. The last entry's weight will be used when the `evolution_factor` is larger than the last entry. Weights are linearly interpolated between entries. Individual weights are scaled linearly so that the cumulative weight is `1`.
Array of evolution and probability info, with the following conditions: The `evolution_factor` must be ascending from entry to entry. The last entry's weight will be used when the `evolution_factor` is larger than the last entry. Weights are linearly interpolated between entries. Individual weights are scaled linearly so that the cumulative weight is `1`.
unit | :: EntityID |

## Properties

### unit :: EntityID

### spawn_points :: array[SpawnPoint]

Array of evolution and probability info, with the following conditions:

- The `evolution_factor` must be ascending from entry to entry.

- The last entry's weight will be used when the `evolution_factor` is larger than the last entry.

- Weights are linearly interpolated between entries.

- Individual weights are scaled linearly so that the cumulative weight is `1`.

Type used in

- EnemySpawnerPrototype::result_units