Class: WSLight::Set::StarSet

Inherits:
ColorSet show all
Defined in:
lib/ws_light/set/star_set.rb

Overview

Creates a set with all random colors

Constant Summary collapse

FRAMES_PER_STAR = 
75
VISIBLE_STARS = 
7
BLACK = 
Color.new(0, 0, 0)

Constants inherited from ColorSet

ColorSet::DEFAULT_LENGTH, ColorSet::DEFAULT_TYPE

Instance Attribute Summary

Attributes inherited from ColorSet

#color, #full_length, #length, #type

Instance Method Summary collapse

Methods inherited from ColorSet

#frame_data, #initialize

Constructor Details

This class inherits a constructor from WSLight::Set::ColorSet

Instance Method Details

#brightness(frame_distance) ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 48

def brightness(frame_distance)
  (255 * (1.0 - (frame_distance.to_f / (FRAMES_PER_STAR.to_f / 2.0)))).to_i
end

#draw_star(position, star_frame) ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 39

def draw_star(position, star_frame)
  white = brightness((star_frame.to_f - (FRAMES_PER_STAR.to_f / 2.0)).abs)
  @set[position] = Color.new(white, white, white)
end

#frame ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 24

def frame
  next_frame
  @set
end

#generate_frame ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 29

def generate_frame
  @set = []
  @full_length.times { @set << BLACK }
  start = (@frame_count * VISIBLE_STARS / FRAMES_PER_STAR) % @max
  VISIBLE_STARS.times do |i|
    star_ratio = FRAMES_PER_STAR.to_f / VISIBLE_STARS.to_f
    draw_star(@stars[start + i], @frame_count - ((start - VISIBLE_STARS + 1 + i) * star_ratio).to_i)
  end
end

#init ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 11

def init
  @stars = (0..(@full_length - 4)).to_a.shuffle
  @max = @stars.size
  @stars += @stars[@stars.size - VISIBLE_STARS, VISIBLE_STARS]
  generate_frame
end

#next_frame ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 18

def next_frame
  @frame_count += 1
  @frame_count = @frame_count % (@max * FRAMES_PER_STAR)
  generate_frame
end

#pixel(number) ⇒ Object 



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# File 'lib/ws_light/set/star_set.rb', line 44

def pixel(number)
  @set[number]
end