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FPS Tower Defense Toolkit v4.11 Basics: Wave Spawning Systems

The FPSTDT's Wave Handler class (starting with v1.4) supports 3 types of wave spawning systems: Unit Based Generator, Group Based Generator & Threat Based Generator.

1. Unit Based Generator

Provides maximum direct control over the wave spawning systems. Best suited for creating games with small waves by setting the properties of every unit on an individual basis. 

- The 'Enemy_Type' variable provides a dropdown to select from any of the 3 default enemy units.
- The 'Delay' variable determines the spawn time of the unit relative to starting time of the active wave.
- The 'SpawnPoint' variable can be used to choose from any of the available 'BP_EnemySpawnPoint' actors in the level.
- The 'WaveNumber' variable specifies the unit's associated wave number.



2. Group Based Generator

Provides good control over the wave spawning systems and easier to test different wave formations. Bots are spawned as automated groups and hence best suited for games that require large number of units in a wave, while still providing designers with the control of the unit types and the number of units in a group.

- The 'Enemy_Type' variable provides a dropdown to select from the 3 default enemy units. A group can contain only bots of a particular enemy type.
- The 'SpawnDelay' variable can be used to specify the time delay between spawning of each bot in a group.
- The 'SpawnPoint' variable can be used to choose from any of the available 'BP_EnemySpawnPoint' actors in the level. All units in a group will spawn from this spawn point.
- The 'WaveNumber' variable specifies the unit's associated wave number.
- The 'SpawnStartingTime' variable determines the starting time for spawning the first unit in the group, relative to the starting time of the active wave.
- The 'NumberOfUnits' variable specifies the number of units in the group.


3. Threat Based Generator

Provides least direct control over the spawning system, but facilitates automated generation of random wave formations. Bots are spawned randomly based on the specified enemy types until the threat level of the wave reached the specified value.

- The 'Enemy_Type' variable can be used to select all the bot types to be considered while generating the wave.
- The 'Delay' variable can be used to specify the time delay between spawning of each bot in a group.
- The 'WaveNumber' variable specifies the associated wave number.
- The 'ThreatRating' variable determines the maximum threat limit of the wave. Can be used to increase the difficulty of each wave automatically.




In order to facilitate creation of large number of waves, the 'NumberOfCycles' variable can be used to repeat the waves for a specified number of times, each cycle increasing the health of enemy units based on the active cycle number. Setting this number to zero can be used to create Endless waves.