Union of 2D polygon and its mirrorX doesn't work

[gilboonet]

Expected Behavior

Have full design from its half.

Actual Behavior

Only have one half of design made from union of a polygon and mirrorX of itself.

Steps to Reproduce the Problem

  let P =  [[0,30],[-16,13],[-10,13],[-23,-3],[-16,-3],[-32,-21],[-16,-21],[-16,-30],[13,-30],[13,-20],[28,-20],[13,-2],[19,-2],[8,13],[13,13]]

  let half2D = polygon({points:P})
  let mirroredHalf2D = mirrorX(half2D)

  let full2D = union(half2D, mirroredHalf2D)

  return full2D

Specifications

• Version: latest online
• Platform: latest KUbuntu 64 bits
• Environment: latest Firefox 64 bits

[z3dev]

@platypii how about adding the fix to V2? i think there's enough small fixes to V2 now to justify a new version.