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Qualify "coplanar" in the documentation #26

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Qualify "coplanar" in the documentation #26

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9 changes: 5 additions & 4 deletions csg.js
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Original file line number Diff line number Diff line change
Expand Up @@ -23,10 +23,11 @@
// b.clipTo(a);
// a.build(b.allPolygons());
//
// The only tricky part is handling overlapping coplanar polygons in both trees.
// The code above keeps both copies, but we need to keep them in one tree and
// remove them in the other tree. To remove them from `b` we can clip the
// inverse of `b` against `a`. The code for union now looks like this:
// The only tricky part is handling overlapping coplanar (same normal direction)
// polygons in both trees. The code above keeps both copies, but we need to keep
// them in one tree and remove them in the other tree. To remove them from `b` we
// can clip the inverse of `b` against `a`. The code for union now looks like
// this:
//
// a.clipTo(b);
// b.clipTo(a);
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