Entity-System-Type-System.md

Type System

• Each entity is of a specific entity type (see below for common entity types)
  • Example: Player Hanack is a player
• Each entity inherits and overwrites attributes of the entity type
  • Example: Player Hanack is a player, therefore there is an attribute frags because all _player_s have an attribute named frags
• An entity type can have a parent entity type
  • Example: projectiles are specialized particles
  • See the type hierarchy below
• Each entity type has an entity renderer
  • Example: Quad Damage Renderer renders entities of type quad damage
  • Entity renderers are implemented in C++

Entity Types

• players
• mapmodels
• positional trigger (often mode specific)
  • flag
  • base
  • teleporter
  • teleport destination
  • ...
• pickups (modifies player state or game state)
  • ammo
  • armor
  • health
  • health boost
  • quad damage
  • extra bomb
  • increase bomb damage
  • ...
• weapons
  • chainsaw
  • pistol
  • chaingun
  • rocket launcher
  • grenade launcher (= projectile emitter + geometry collision particle modifier)
  • rifle
  • bomb launcher
  • ...
• particles
  • visual effects
    • steam
    • fire
    • flare
    • explosion
      • volumetric expansion of explosions (also using the densitiy attributes)
  • projectiles
    • grenade
    • rocket
    • fog grenade
    • shot line
  • decals
• particle emitter
• particle modifier