Class: Motel::MovementStrategies::Linear

Inherits:
Motel::MovementStrategy show all
Defined in:
lib/motel/movement_strategies/linear.rb

Overview

The Linear MovementStrategy moves a location in a linear manner as defined by a unit direction vector and a floating point speed

Instance Attribute Summary collapse

Attributes inherited from Motel::MovementStrategy

#id, #step_delay, #type

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ Linear

Returns a new instance of Linear.



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# File 'lib/motel/movement_strategies/linear.rb', line 21

def initialize(args = {})
  @direction_vector_x   = args[:direction_vector_x] if args.has_key? :direction_vector_x
  @direction_vector_y   = args[:direction_vector_y] if args.has_key? :direction_vector_y
  @direction_vector_z   = args[:direction_vector_z] if args.has_key? :direction_vector_z
  @speed                = args[:speed] if args.has_key? :speed
  super(args)

  # normalize direction vector
  @direction_vector_x, @direction_vector_y, @direction_vector_z =
    normalize(@direction_vector_x, @direction_vector_y, @direction_vector_z)
end

Instance Attribute Details

#direction_vector_x ⇒ Object

Returns the value of attribute direction_vector_x.



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# File 'lib/motel/movement_strategies/linear.rb', line 17

def direction_vector_x
  @direction_vector_x
end

#direction_vector_y ⇒ Object

Returns the value of attribute direction_vector_y.



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# File 'lib/motel/movement_strategies/linear.rb', line 17

def direction_vector_y
  @direction_vector_y
end

#direction_vector_z ⇒ Object

Returns the value of attribute direction_vector_z.



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# File 'lib/motel/movement_strategies/linear.rb', line 17

def direction_vector_z
  @direction_vector_z
end

#speed ⇒ Object

Returns the value of attribute speed.



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# File 'lib/motel/movement_strategies/linear.rb', line 19

def speed
  @speed
end

Instance Method Details

#move(location, elapsed_seconds) ⇒ Object

Motel::Models::MovementStrategy::move



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# File 'lib/motel/movement_strategies/linear.rb', line 35

def move(location, elapsed_seconds)
  #unless valid?
  #  Logger.warn "linear movement strategy not valid, not proceeding with move"
  #  return
  #end

  Logger.debug "moving location #{location.id} via linear movement strategy " +
               "#{speed} #{direction_vector_x}/#{direction_vector_y}/#{direction_vector_z}"

  # calculate distance and update x,y,z accordingly
  distance = speed * elapsed_seconds

  location.x += distance * direction_vector_x
  location.y += distance * direction_vector_y
  location.z += distance * direction_vector_z
end