Class: Zyps::Environment

Inherits:
Object
  • Object
show all
Includes:
Observable
Defined in:
lib/zyps.rb

Overview

A virtual environment.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Environment

Takes a hash with these keys and defaults: :objects => [], :environmental_factors => []



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# File 'lib/zyps.rb', line 36

def initialize (options = {})
  options = {
    :objects => [], 
    :environmental_factors => []
  }.merge(options)
  self.objects, self.environmental_factors = options[:objects], options[:environmental_factors]
  @clock = Clock.new
end

Instance Attribute Details

#environmental_factors ⇒ Object

An array of EnvironmentalFactor objects that act on any GameObject in the Environment.



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# File 'lib/zyps.rb', line 31

def environmental_factors
  @environmental_factors
end

#objects ⇒ Object

An array of GameObject objects that reside in the Environment.



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# File 'lib/zyps.rb', line 29

def objects
  @objects
end

Instance Method Details

#copy ⇒ Object

Make a deep copy.



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# File 'lib/zyps.rb', line 46

def copy
  copy = self.clone #Currently, we overwrite everything anyway, but we may add some clonable attributes later.
  #Make a deep copy of all objects.
  copy.objects = []
  @objects.each {|object| copy.objects << object.copy}
  #Make a deep copy of all environmental_factors.
  copy.environmental_factors = []
  @environmental_factors.each {|environmental_factor| copy.environmental_factors << environmental_factor.copy}
  copy
end

#interact ⇒ Object

Allow everything in the environment to interact with each other. Objects are first moved according to their preexisting vectors and the amount of time since the last call. Then, each GameObject with an act() method is allowed to act on the environment. Finally, each EnvironmentalFactor is allowed to act on the Environment.



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# File 'lib/zyps.rb', line 61

def interact

  #Get time since last interaction.
  elapsed_time = @clock.elapsed_time
  
  objects.each do |object|
  
    #Move each object according to its vector.
    begin
      object.move(elapsed_time)
    #Remove misbehaving objects.
    rescue Exception => exception
      puts exception, exception.backtrace
      objects.delete(object)
      next
    end
    
    #Have all creatures interact with the environment.
    if object.respond_to?(:act)
      begin
        #Have creature act on all GameObjects other than itself.
        object.act(objects.reject{|target| target.equal?(object)})
      #Remove misbehaving objects.
      rescue Exception => exception
        puts exception, exception.backtrace
        objects.delete(object)
        next
      end
    end
      
    
  end
  
  #Have all environmental factors interact with environment.
  environmental_factors.each do |factor|
    begin
      factor.act(self)
    #Remove misbehaving environmental factors.
    rescue Exception => exception
      environmental_factors.delete(factor)
      puts exception, exception.backtrace
      next
    end
  end
    
  #Mark environment as changed.
  changed
  
  #Alert observers.
  notify_observers(self)
  
end