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Contents
module Mongoid
module Spacial
module Formulas
class << self
def n_vector(point1,point2)
p1 = point1.map{|deg| deg * RAD_PER_DEG}
p2 = point2.map{|deg| deg * RAD_PER_DEG}
sin_x1 = Math.sin(p1[0])
cos_x1 = Math.cos(p1[0])
sin_y1 = Math.sin(p1[1])
cos_y1 = Math.cos(p1[1])
sin_x2 = Math.sin(p2[0])
cos_x2 = Math.cos(p2[0])
sin_y2 = Math.sin(p2[1])
cos_y2 = Math.cos(p2[1])
cross_prod = (cos_y1*cos_x1 * cos_y2*cos_x2) +
(cos_y1*sin_x1 * cos_y2*sin_x2) +
(sin_y1 * sin_y2)
return cross_prod > 0 ? 0 : Math::PI if (cross_prod >= 1 || cross_prod <= -1)
d = Math.acos(cross_prod)
d.instance_variable_set("@radian", true)
d
end
def haversine(point1,point2)
p1 = point1.map{|deg| deg * RAD_PER_DEG}
p2 = point2.map{|deg| deg * RAD_PER_DEG}
dlon = p2[0] - p1[0]
dlat = p2[1] - p1[1]
a = (Math.sin(dlat/2))**2 + Math.cos(p1[1]) * Math.cos(p2[1]) * (Math.sin(dlon/2))**2
d = 2 * Math.atan2( Math.sqrt(a), Math.sqrt(1-a))
d.instance_variable_set("@radian", true)
d
end
def pythagorean_theorem(p1, p2)
Math.sqrt(((p2[0] - p1[0]) ** 2) + ((p2[1] - p1[1]) ** 2))
end
end
end
end
end
Version data entries
11 entries across 11 versions & 3 rubygems