Contents

require 'mittsu/math/vector'

module Mittsu
  class Vector2 < Vector
    ELEMENTS = { x: 0, y: 1 }
    DIMENSIONS = ELEMENTS.count

    def initialize(x = 0, y = 0)
      super [x.to_f, y.to_f]
    end

    def set(x, y)
      super [x.to_f, y.to_f]
    end

    def x; @elements[0]; end
    def y; @elements[1]; end

    def x=(value); @elements[0] = value.to_f; end
    def y=(value); @elements[1] = value.to_f; end

    def dot(v)
      x * v.x + y * v.y
    end

    def distance_to_squared(v)
      dx, dy = x - v.x, y - v.y
      dx * dx + dy * dy
    end

    def from_attribute(attribute, index, offset = 0)
      index = index * attribute.item_size + offset
      @elements[0] = attribute.array[index]
      @elements[1] = attribute.array[index + 1]
      self
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
mittsu-0.5.0	lib/mittsu/math/vector2.rb
mittsu-0.4.1	lib/mittsu/math/vector2.rb
mittsu-0.4.0	lib/mittsu/math/vector2.rb
mittsu-0.3.3	lib/mittsu/math/vector2.rb
mittsu-0.3.2	lib/mittsu/math/vector2.rb