Class: Castaway::Interpolation::Linear

Inherits:
Object
  • Object
show all
Defined in:
lib/castaway/interpolation/linear.rb

Overview

A linear interpolation between two values

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(start, finish) ⇒ Linear

Returns a new instance of Linear.



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# File 'lib/castaway/interpolation/linear.rb', line 8

def initialize(start, finish)
  @start = start
  @finish = finish
  @delta = finish - start
end

Instance Attribute Details

#finish ⇒ Object (readonly)

Returns the value of attribute finish.



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# File 'lib/castaway/interpolation/linear.rb', line 6

def finish
  @finish
end

#start ⇒ Object (readonly)

Returns the value of attribute start.



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# File 'lib/castaway/interpolation/linear.rb', line 6

def start
  @start
end

Instance Method Details

#[](t) ⇒ Object 



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# File 'lib/castaway/interpolation/linear.rb', line 14

def [](t)
  if t < 0
    @start
  elsif t > 1
    @finish
  else
    @delta * t + @start
  end
end