Entity:components

Returns all components on this entity that are of a specific class or inherit fom it.

Usage

entity:components(class)

Arguments

Name	Type	Description
class	string or component class	The component class to look up in this entity’s components, as a string or as a reference.

Returns

Name	Type	Description
components	table	A table where each key is a component of the specified class or inherits from it.

If the entity has no component of the specified class (or inheriting from it), this method returns an empty table.

Examples

local Arm = Class("Arm", crystal.Component);
Arm.init = function(self, side)
  self.side = side;
end

local ecs = crystal.ECS:new();
local entity = ecs:spawn(crystal.Entity);
local left_arm = entity:add_component("Arm", "left");
local right_arm = entity:add_component("Arm", "right");
for arm in pairs(entity:components("Arm")) do
  print(arm.side);
end