Class: Box2D::Events

Inherits:
Object
  • Object
show all
Defined in:
lib/box2d/events.rb

Constant Summary collapse

EMPTY = 
[].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(begin_contacts:, end_contacts:, hits:, sensor_begins:, sensor_ends:) ⇒ Events

Returns a new instance of Events.



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# File 'lib/box2d/events.rb', line 68

def initialize(begin_contacts:, end_contacts:, hits:, sensor_begins:, sensor_ends:)
  @begin_contacts = begin_contacts.freeze
  @end_contacts = end_contacts.freeze
  @hits = hits.freeze
  @sensor_begins = sensor_begins.freeze
  @sensor_ends = sensor_ends.freeze
  freeze
end

Instance Attribute Details

#begin_contacts ⇒ Object (readonly)

Returns the value of attribute begin_contacts.



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# File 'lib/box2d/events.rb', line 15

def begin_contacts
  @begin_contacts
end

#end_contacts ⇒ Object (readonly)

Returns the value of attribute end_contacts.



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# File 'lib/box2d/events.rb', line 15

def end_contacts
  @end_contacts
end

#hits ⇒ Object (readonly)

Returns the value of attribute hits.



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# File 'lib/box2d/events.rb', line 15

def hits
  @hits
end

#sensor_begins ⇒ Object (readonly)

Returns the value of attribute sensor_begins.



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# File 'lib/box2d/events.rb', line 15

def sensor_begins
  @sensor_begins
end

#sensor_ends ⇒ Object (readonly)

Returns the value of attribute sensor_ends.



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# File 'lib/box2d/events.rb', line 15

def sensor_ends
  @sensor_ends
end

Class Method Details

.capture(world) ⇒ Object 



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# File 'lib/box2d/events.rb', line 27

def self.capture(world)
  contact_events = Native.b2World_GetContactEvents(world.id)
  sensor_events = Native.b2World_GetSensorEvents(world.id)
  new(
    begin_contacts: read_array(contact_events[:beginEvents], contact_events[:beginCount], Native::ContactBeginTouchEvent) do |event|
      ContactBegin.new(
        shape_a: world.shape_for_id(event[:shapeIdA]),
        shape_b: world.shape_for_id(event[:shapeIdB]),
        manifold: capture_manifold(event[:manifold])
      )
    end,
    end_contacts: read_array(contact_events[:endEvents], contact_events[:endCount], Native::ContactEndTouchEvent) do |event|
      ContactEnd.new(
        shape_a: world.shape_for_id(event[:shapeIdA]),
        shape_b: world.shape_for_id(event[:shapeIdB])
      )
    end,
    hits: read_array(contact_events[:hitEvents], contact_events[:hitCount], Native::ContactHitEvent) do |event|
      ContactHit.new(
        shape_a: world.shape_for_id(event[:shapeIdA]),
        shape_b: world.shape_for_id(event[:shapeIdB]),
        point: ValueConversion.vec2(event[:point]),
        normal: ValueConversion.vec2(event[:normal]),
        approach_speed: event[:approachSpeed]
      )
    end,
    sensor_begins: read_array(sensor_events[:beginEvents], sensor_events[:beginCount], Native::SensorBeginTouchEvent) do |event|
      SensorBegin.new(
        sensor: world.shape_for_id(event[:sensorShapeId]),
        visitor: world.shape_for_id(event[:visitorShapeId])
      )
    end,
    sensor_ends: read_array(sensor_events[:endEvents], sensor_events[:endCount], Native::SensorEndTouchEvent) do |event|
      SensorEnd.new(
        sensor: world.shape_for_id(event[:sensorShapeId]),
        visitor: world.shape_for_id(event[:visitorShapeId])
      )
    end
  )
end

.empty ⇒ Object 



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# File 'lib/box2d/events.rb', line 17

def self.empty
  new(
    begin_contacts: EMPTY,
    end_contacts: EMPTY,
    hits: EMPTY,
    sensor_begins: EMPTY,
    sensor_ends: EMPTY
  )
end