diff options
Diffstat (limited to 'mrbgem/mrblib/felecs.rb')
| -rw-r--r-- | mrbgem/mrblib/felecs.rb | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/mrbgem/mrblib/felecs.rb b/mrbgem/mrblib/felecs.rb index 56726b2..88e9423 100644 --- a/mrbgem/mrblib/felecs.rb +++ b/mrbgem/mrblib/felecs.rb @@ -100,6 +100,39 @@ module FelECS # def to_json() end class << self + # Selects every entity that has components of they type passed into + # this function and then executes the code block for those components + # and entities. + # @return [Nil] + def group(*component_managers, &block) + return nil if component_managers.empty? + if component_managers.length == 1 + component_managers.first.each do |cmp| + block.call(cmp, cmp.entity) + end + else + arry = component_managers.first.select do |cmp| + ent = cmp.entity + keep = true + component_managers.drop(1).each do |mgr| + next unless ent.components[mgr].nil? + keep = false + break + end + keep + end + arry.each do |cmp| + ent = cmp.entity + cmp_arry = [cmp] + component_managers.drop(1).each do |cmp_mgr| + cmp_arry.push ent.component[cmp_mgr] + end + block.call(*cmp_arry, ent) + end + end + nil + end + # Makes component managers behave like arrays with additional # methods for managing the array # @!visibility private |