Repeating the same Boolean operation with the same operands may produce different results.

[non-manifold]

Expected Behavior

Performing the same Boolean operation with the same operands should return the same result when repeated.

Current Behavior

Some operations return different and wrong results when repeated.

Possible Solution

Steps to Reproduce (for bugs)

1. Create two overlapping faces p1 = Point.ByCoordinates(-5,-5,0); p2 = Point.ByCoordinates(5,-5,0); p3 = Point.ByCoordinates(5,5,0); p4 = Point.ByCoordinates(-5,5,0); s1 = Surface.ByPerimeterPoints({p1,p2,p3,p4}); A = TopoLogic.Face.BySurface(s1);

p1 = Point.ByCoordinates(1,1,0); p2 = Point.ByCoordinates(10,1,0); p3 = Point.ByCoordinates(10,10,0); p4 = Point.ByCoordinates(1,10,0); s2 = Surface.ByPerimeterPoints({p1,p2,p3,p4}); B = TopoLogic.Face.BySurface(s2);

2. Create a node A.Union(B) C = A.Union(B)

3. Connect A and B to the Union node, see the result. (There is a separate bug with drawing the face).

4. Disconnect one of the inputs, reconnect it again. See the result.

Context

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