Fix IncrementalDelaunayTriangulator to ensure triangulation boundary is convex #953
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dbaston
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Port of locationtech/jts#1004
This adds logic to
IncrementalDelaunayTriangulatorto ensure that the triangulation boundary is always convex (as per specification). This is required because the "frame" created to contain the triangulation construction is not infinitely distant from the input points. This has been causing robustness failures in cases where a site lies very close to the convex hull of the input.This is a robust enhancement that replaces the frame size heuristic change in #728.
Also fixes issues reported for ConcaveHull ( #719, #946)