undo wrong rotator logic

Author: monkstone

contributed/library/branch3D/rotator.rb

@@ -1,19 +1,17 @@
 # Rotator module is required because rotate is not implemented for
 # JRubyArt 3D. Here we use Vec2D.rotate! to do Euclid rotation about an
-# axis (we can then apply the rotation to each axis in turn) we mimic Toxiclibs
-# Vec3D implementation
+# axis (we can then apply the rotation to each axis in turn)
+# Does not take account of processing axis convention but works OK here
 # NB: we use quaternions in ArcBall (to avoid gimbal lock)
-# See:
-# https://medium.com/@behreajj/3d-rotations-in-processing-vectors-matrices-quaternions-10e2fed5f0a3
 module Rotate
   def self.axis!(axis, vec, theta)
     array = vec.to_a
     array.slice! axis
     other = Vec2D.new(*array).rotate! theta
     case axis
     when 0 # xaxis
-      vec.y = other.y
-      vec.z = other.x
+      vec.y = other.x
+      vec.z = other.y
     when 1 # yaxis
       vec.x = other.x
       vec.z = other.y

contributed/recursive_pentagon.rb

@@ -1,4 +1,4 @@
-# After an openprocessing sketch by C.Andrews
+# After an openprocessing sketch by
 load_library :color_group
 attr_reader :strut_factor, :renderer, :cols
 PALETTE = %w[#fff0a5 #ffd500 #594a00 #9999ff #000059].freeze
@@ -9,7 +9,7 @@ def setup
   @renderer = AppRender.new self # so we can send Vec2D :to_vertex
   group = ColorGroup.from_web_array(PALETTE.to_java(:string))
   @cols = group.colors
-  background(0)
+  background(cols.last)
   no_loop
 end