Class: PascalTriangle

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

Overview

This was used to generate the coefficients for the gaussian blur. It would be better to make it dynamic.

Instance Method Summary collapse

Instance Method Details

#generate_c(max_radius = 10) ⇒ Object 



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# File 'lib/pascal.rb', line 25

def generate_c(max_radius=10)
  values = pascal_triangle(max_radius*2 + 1).reject {|a| a.size % 2 == 0}
  puts values.inspect.gsub('[', '{').gsub(']', '}')
  puts sums(max_radius).inspect.gsub('[', '{').gsub(']', '}')
end

#pascal_triangle(levels) ⇒ Object 



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# File 'lib/pascal.rb', line 4

def pascal_triangle(levels)
  values = [[1]]
  (levels - 1).times do
    level = [1]
    values.last[1..-1].each_with_index do |x, i|
      level << x + values.last[i]
    end
    level << 1
    values << level
  end
  values
end

#sums(max_radius) ⇒ Object 



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# File 'lib/pascal.rb', line 17

def sums(max_radius)
  sums = []
  (max_radius + 1).times do |i|
    sums << 2**(i*2)
  end
  sums
end