module OpenPolygon
Constants
- VERSION
Public Class Methods
run(vertex)
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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