Module: OpenPolygon

Defined in:
lib/open_polygon.rb,
lib/open_polygon/version.rb

Defined Under Namespace

Classes: Error

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Class Method Details

.run(vertex) ⇒ Object

Your code goes here…



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# File 'lib/open_polygon.rb', line 6

def self.run(vertex)
    point_x = vertex[0][0].to_f
    point_y = vertex[0][1].to_f
    other_points = vertex[1..vertex.size - 1]
    areas = []
    other_points.each_cons(2) do |double_points|
        x_1 = double_points[0][0].to_f
        y_1 = double_points[0][1].to_f
        x_2 = double_points[1][0].to_f
        y_2 = double_points[1][1].to_f
        calc = (x_1 - point_x) * (y_2 - point_y) - (y_1 - point_y) * (x_2 - point_x)
        areas << calc.abs * 0.5
    end
    areas.sum
end