Collection factory API documentation

Version: alpha

Functions

collectionfactory.create()

collectionfactory.create(url,[position],[rotation],[properties],[scale])

The URL identifies the collectionfactory component that should do the spawning. Spawning is instant, but spawned game objects get their first update calls the following frame. The supplied parameters for position, rotation and scale will be applied to the whole collection when spawned. Script properties in the created game objects can be overridden through a properties-parameter table. The table should contain game object ids (hash) as keys and property tables as values to be used when initiating each spawned game object. See go.property for more information on script properties. The function returns a table that contains a key for each game object id (hash), as addressed if the collection file was top level, and the corresponding spawned instance id (hash) as value with a unique path prefix added to each instance. Calling collectionfactory.create create on a collection factory that is marked as dynamic without having loaded resources using collectionfactory.load will synchronously load and create resources which may affect application performance.

PARAMETERS

RETURNS

EXAMPLES

function init(self)
  -- Spawn a small group of enemies.
  local pos = vmath.vector3(100, 12.5, 0)
  local rot = vmath.quat_rotation_z(math.pi / 2)
  local scale = 0.5
  local props = {}
  props[hash("/enemy_leader")] = { health = 1000.0 }
  props[hash("/enemy_1")] = { health = 200.0 }
  props[hash("/enemy_2")] = { health = 400.0, color = hash("green") }

  local self.enemy_ids = collectionfactory.create("#enemyfactory", pos, rot, props, scale)
  -- enemy_ids now map to the spawned instance ids:
  --
  -- pprint(self.enemy_ids)
  --
  -- DEBUG:SCRIPT:
  -- {
  --   hash: [/enemy_leader] = hash: [/collection0/enemy_leader],
  --   hash: [/enemy_1] = hash: [/collection0/enemy_1],
  --   hash: [/enemy_2] = hash: [/collection0/enemy_2]
  -- }

  -- Send "attack" message to the leader. First look up its instance id.
  local leader_id = self.enemy_ids[hash("/enemy_leader")]
  msg.post(leader_id, "attack")
end

go.delete(self.enemy_ids)

collectionfactory.get_status()

collectionfactory.get_status([url])

This returns status of the collection factory. Calling this function when the factory is not marked as dynamic loading always returns COMP_COLLECTION_FACTORY_STATUS_LOADED.

PARAMETERS

RETURNS

collectionfactory.load()

collectionfactory.load([url],[complete_function])

Resources loaded are referenced by the collection factory component until the existing (parent) collection is destroyed or collectionfactory.unload is called. Calling this function when the factory is not marked as dynamic loading does nothing.

PARAMETERS

EXAMPLES

collectionfactory.load("#factory", function(self, url, result) end)

collectionfactory.set_prototype()

collectionfactory.set_prototype([url],[prototype])

Changes the prototype for the collection factory. Setting the prototype to "nil" will revert back to the original prototype.

PARAMETERS

EXAMPLES

collectionfactory.unload("#factory") -- unload the previous resources
collectionfactory.set_prototype("#factory", "/main/levels/level1.collectionc")
local ids = collectionfactory.create("#factory", go.get_world_position(), vmath.quat())

collectionfactory.unload()

collectionfactory.unload([url])

This decreases the reference count for each resource loaded with collectionfactory.load. If reference is zero, the resource is destroyed. Calling this function when the factory is not marked as dynamic loading does nothing.

PARAMETERS

EXAMPLES

collectionfactory.unload("#factory")

Constants

collectionfactory.STATUS_LOADED

loaded

collectionfactory.STATUS_LOADING

loading

collectionfactory.STATUS_UNLOADED

unloaded