Voronoi diagram: Difference between revisions

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@@ Line 2,517: / Line 2,517: @@
 {{libheader|JRubyArt}}
 JRubyArt is a port of processing to ruby
-<lang ruby>
+<lang ruby># frozen_string_literal: true
-# frozen_string_literal: true
+Tile = Struct.new(:x, :y, :color) do
-attr_reader :colors, :positions
+  def sq_dist(a, b)
+    (x - a)**2 + (y - b)**2
+  end
+end
+attr_reader :tiles
 def settings
@@ Line 2,529: / Line 2,534: @@
   sketch_title 'Voronoi Diagram'
   load_pixels
-  color_mode(HSB, 360, 1, 1)
+  color_mode(HSB, 1.0)
-  @colors = generate_colors(30)
+  @tiles = generate_tiles(30)
-  @positions = generate_positions(30)
   draw_voronoi
   update_pixels
@@ Line 2,537: / Line 2,541: @@
 end
-def generate_colors(num)
+def generate_tiles(num)
-  (0..num).map { color(rand(360), 1.0, 1.0) }
+  (0..num).map { Tile.new(rand(width), rand(height), color(rand, 1.0, 1.0)) }
-end
-def generate_positions(num)
-  (0..num).map { Vec2D.new(rand(width), rand(height)) }
 end
 def draw_voronoi
   grid(width, height) do |x, y|
-    pos = Vec2D.new(x, y)
+    closest = tiles.min_by { |tile| tile.sq_dist(x, y) }
+    pixels[x + y * width] = closest.color
-    closest = positions.min_by { |posn| posn.dist(pos) }
-    index = positions.index closest
-    pixels[x + y * width] = colors[index]
   end
 end
 def draw_voronoi_centers
-  positions.each do |pos|
+  tiles.each do |center|
     no_stroke
     fill 0
-    ellipse(pos.x, pos.y, 4, 4)
+    ellipse(center.x, center.y, 4, 4)
   end
 end
 </lang>