Class: RedBird::EntityCollision

Inherits:
Object
  • Object
show all
Defined in:
lib/red_bird/entity_collision.rb

Overview

This class does collision tests between entities.

Instance Method Summary collapse

Constructor Details

#initialize(entities) ⇒ EntityCollision

Returns a new instance of EntityCollision.

Parameters:

  • entities (Array<RedBird::Entity>) —

    array containing the entities to test for collusion.

Author:

  • Frederico Linhares



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# File 'lib/red_bird/entity_collision.rb', line 8

def initialize(entities)
  @entities = entities
end

Instance Method Details

#call ⇒ Object

Loop over entities in the array and test if they collide. In the case of collision, it calls the method collide of the entity and sends the entity it collided to as a single argument.

Author:

  • Frederico Linhares



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# File 'lib/red_bird/entity_collision.rb', line 17

def call
  # Calculate entities rote
  @entities.each_with_index do |e1, i|
    @entities.drop(i + 1).each do |e2|
      if e1.collision_box.collide? e2.collision_box then
        e1.collide(e2)
        e2.collide(e1)
        # If an object responds to 'collision_box' then it is tested.
      end if e1.respond_to?('collision_box')
    end
  end
end