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entities = {}
-- Bace component class of the ECS
class Component
depends: {}
new: (name, properties) =>
@name = name
@properties = properties or {}
join: (e) =>
@
leave: (e) =>
@
-- Base entity of our ECS
class Entity
id: 1
new: (id, components) => -- [id], [components]
id_cur = #entities
while id == nil
id_cur += 1
if entities[id_cur] == nil
id = id_cur
assert(entities[id] == nil, "Attempted to create entity with the same id as one that already exists: " .. tostring(id))
entities[id] = @
@id = id
-- Bookkeeping for O(1) access for componenets
@c_by_type = {}
--Entity is responsible for the component -> entity link
@components = componenets or {}
for name, component in pairs(components)
component.entity = @
@c_by_type[component.__class] = @c_by_type[component.__class] or {}
@c_by_type[component.__class][name] = component
component\join(@)
add: (cid, component) =>
component.entity = @
component\join(@)
if cid == nil
cid = #@components
while @components[cid]
cid += 1
assert(@components[cid] == nil, "Already had a component with id" .. tostring(cid))
@components[cid] = component
@
remove: (cid) =>
component = @components[cid]
component.entity = nil
component\leave(@)
component
get: (cid) =>
@components[cid]
class NetworkedComponent extends Component
pack: () =>
assert(@entity, "Tried to pack on a NetworkedComponent without an Entity")
return am.to_json({
id: @entity.id
data: @properties
time: am.current_time!
})
class PredictedComponent extends Component
new: (name, properties, netc_name, calculate) =>
super(name, properties)
@netc_name = netc_name
@calculate = calculate
join: (entity) =>
@net = entity[@netc_name]
forward: () =>
for proeprty, calculation in pairs(@calculate)
@properties[property] = calculation(@)
class GraphicsComponent extends Component
new: (name, properties) =>
assert(properties.node , "Failed to find node for graphics component")
super(name, properties)
{
Component: Component
Entity: Entity
NetworkedComponent: NetworkedComponent
PredictedComponent: PredictedComponent
GraphicsComponent: GraphicsComponent
}
}
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