lighttroupe/luz

class ActorEffectVariableChildRouter < ActorEffect
    title                "Variable Child Router"
    description "Routes values from one of a consecutive series of input variables to the chosen output variable. The routing depends on the child number: the first input variable while rendering the first child, the second for the second child, etc."

    hint "Put this after an effect that creates children, and before one or more effects that respond to the chosen output variable."

    setting 'first_input', :variable, :summary => '% input'
    setting 'input_count', :integer, :range => 1..999, :summary => true

    setting 'output', :variable, :summary => '% output'

    def render
        output_variable = output_setting.variable
        return yield unless output_variable

        first_index = $engine.project.variables.index(first_input_setting.variable)
        return yield unless first_index

        index = first_index + (child_index % input_count)

        input_variable = $engine.project.variables[index]
        return yield unless input_variable

        value = input_variable.do_value

        output_variable.with_value(value) {
            yield
        }
    end
end