Class: RTanque::NormalizedAttr::AttrContainer

Inherits:
Object
  • Object
show all
Defined in:
lib/rtanque/normalized_attr.rb

Instance Method Summary collapse

Constructor Details

#initialize(range, max_delta = MAX_DELTA) ⇒ AttrContainer

Returns a new instance of AttrContainer.



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# File 'lib/rtanque/normalized_attr.rb', line 20

def initialize(range, max_delta = MAX_DELTA)
  @range = range
  @max_delta = max_delta
end

Instance Method Details

#delta(current_value, new_value) ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 51

def delta(current_value, new_value)
  if current_value
    # Heading responds to delta
    current_value.respond_to?(:delta) ? current_value.delta(new_value) : (new_value - current_value)
  else
    0
  end
end

#enforce_delta(attached_instance, current_value, new_value) ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 41

def enforce_delta(attached_instance, current_value, new_value)
  current_delta = self.delta(current_value, new_value)
  current_max_delta = self.max_delta(attached_instance)
  if current_delta.abs > current_max_delta
    current_delta > 0 ? current_value + current_max_delta : current_value - current_max_delta
  else
    new_value
  end
end

#enforce_range(value) ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 60

def enforce_range(value)
  if @range.include?(value)
    value
  else
    value > self.max ? self.max : self.min
  end
end

#max ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 29

def max
  @range.last
end

#max_delta(attached_instance) ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 37

def max_delta(attached_instance)
  @max_delta.respond_to?(:call) ? @max_delta.call(attached_instance) : @max_delta
end

#min ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 25

def min
  @range.first
end

#normalize(attached_instance, current_value, new_value) ⇒ Object 



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# File 'lib/rtanque/normalized_attr.rb', line 33

def normalize(attached_instance, current_value, new_value)
  self.enforce_range(self.enforce_delta(attached_instance, current_value, new_value))
end