Class: Numeric

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

Overview

Numeric extensions for graphics

Instance Method Summary collapse

Instance Method Details

#close_to?(n, delta = 0.01) ⇒ Boolean

Is M close to N within a certain delta?

Returns:

  • (Boolean) 


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# File 'lib/graphics/extensions.rb', line 20

def close_to? n, delta = 0.01
  (self - n).abs < delta
end

#degrees ⇒ Object

Normalize a number to be within 0…360



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# File 'lib/graphics/extensions.rb', line 27

def degrees
  self % 360
end

#relative_angle(n, max) ⇒ Object

I am honestly befuddled by this code, and I wrote it.

I should probably remove it and start over.

Consider this method private, even tho it is in use by the demos.



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# File 'lib/graphics/extensions.rb', line 38

def relative_angle n, max
  delta_cw = (self - n).degrees
  delta_cc = (n - self).degrees

  return if delta_cc < 0.1 || delta_cw < 0.1

  if delta_cc.abs < max then
    delta_cc
  elsif delta_cw.close_to? 180 then
    [-max, max].sample
  elsif delta_cw < delta_cc then
    -max
  else
    max
  end
end