Module: AdventureRL::Modifiers::Gravity

Defined in:
lib/AdventureRL/Modifiers/Gravity.rb

Constant Summary collapse

DEFAULT_GRAVITY_SETTINGS =

include AdventureRL::Modifiers::Velocity # NOTE: This modifier relies on Modifiers::Velocity

Settings.new(
  gravity_force:     1000.0,
  gravity_direction: {
    x: 0.0,
    y: 1.0
  }
)

Instance Method Summary collapse

Instance Method Details

#gravitize ⇒ Object

Apply gravitational force.



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# File 'lib/AdventureRL/Modifiers/Gravity.rb', line 27

def gravitize
  previous_position = get_position.dup
  get_gravity_directions.each do |axis, multiplier|
    next  if (@has_increased_velocity_for[axis])
    set_position axis => (get_position(axis) + multiplier)  unless (multiplier == 0)
    if (in_collision?)
      @velocity[axis] = 0.0
    else  #if ([0, @gravity_direction[axis].sign].include? get_velocity(axis).sign)
      increase_velocity_by(
        axis => ((@gravity_force * @gravity_direction[axis]) * @velocity_deltatime.dt),
        no_quick_turn_around: true
      )
    end
    set_position previous_position
  end
end

#initialize(settings = {}) ⇒ Object 



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# File 'lib/AdventureRL/Modifiers/Gravity.rb', line 14

def initialize settings = {}
  @settings          = DEFAULT_GRAVITY_SETTINGS.merge settings
  @gravity           = 0.0
  @gravity_force     = @settings.get :gravity_force
  @gravity_direction = @settings.get :gravity_direction
  #@max_velocity = @max_velocity_original.dup
  super @settings
  @max_velocity_original[:y] = Float::INFINITY
  @max_velocity[:y]          = @max_velocity_original[:y].dup
  @velocity_decay[:y]        = 0
end

#move ⇒ Object

Overwrite Modifiers::Velocity#move, so we can update the gravity.



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# File 'lib/AdventureRL/Modifiers/Gravity.rb', line 46

def move
  super
  gravitize
end