Merge pull request #7 from felix-d/update-hsluv

Update HSLUV to latest version

hsluv.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = 'hsluv'
-  spec.version       = '1.0.1'
+  spec.version       = '1.0.2'
   spec.authors       = ['Radu-Bogdan Croitoru', 'HSLuv Contributors']
   spec.email         = ['[email protected]', '[email protected]']
 

lib/hsluv.rb

@@ -95,10 +95,18 @@ def xyz_to_luv (arr)
 
   def luv_to_lch (arr)
     l, u, v = arr
-    c = ((u ** 2) + (v ** 2)) ** (1 / 2.0)
-    hrad = Math.atan2(v, u)
-    h = radians_to_degrees(hrad)
-    h += 360.0 if h < 0.0
+
+    c = Math.sqrt(u * u + v * v)
+
+    h = if c < 0.00000001
+      0.0
+    else
+      hrad = Math.atan2(v, u)
+      h = hrad * 180.0 / Math::PI
+      h += 360.0 if h < 0.0
+      h
+    end
+
     [l, c, h]
   end
 
@@ -271,4 +279,4 @@ def dot_product (a, b)
   def rgb_prepare (arr)
     arr.map! { |ch| ch = ch.round(3); ch = [0, ch].max; ch = [1, ch].min; (ch * 255).round }
   end
-end
+end

spec/hsluv_spec.rb

@@ -5,7 +5,7 @@
 describe Hsluv do
 
   describe 'snapshot' do
-    snapshot = JSON.parse(File.read('spec/fixtures/snapshot-rev3.json'))
+    snapshot = JSON.parse(File.read('spec/fixtures/snapshot-rev4.json'))
 
     snapshot.each do |block|
       hex = block.first