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1. Extrema algorithm calls Curve-surface intersector. This intersector returns flag about infinite solution (in spite of extrema's returning not-parallel status correctly - axes of considered cylinder and circle are not parallel). In this case, attempt of obtaining number of intersection points leads to exception. So, the fix adds check of infinite solution after the intersection algorithm. 2. The methods IsDone(), IsParallel(), NbExt(), SquareDistance() and Points() (of Extrema_* classes) have been corrected to make them consistent to the documentation. 3. Revision of some Extrema_* classes has been made in order to avoid places with uninitialized variables. 4. Currently Extrema does not store any points in case when the arguments are parallel. It stores the distance only. 5. Some cases on Extrema-algo have been moved from "fclasses"-group to "modalg"-group.
20 lines
591 B
Plaintext
20 lines
591 B
Plaintext
puts "========"
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puts "OCC29712"
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puts "========"
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puts ""
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#################################################
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# Extrema algorithm raises exception
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#################################################
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# Curves c1 and c2 lie on parallel lines.
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# However, they are bounded (B-spline) curves
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# and are shifted relatively to each other. So,
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# perpendicular between these curves does not exist but
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# extrema must be found as in case "Not-parallel".
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bsplinecurve c1 1 2 0 2 1 2 0 0 0 1 1 0 0 1
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bsplinecurve c2 1 2 0 2 1 2 3 4 0 1 4 4 0 1
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extrema c1 c2
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checklength ext_1 -l [expr sqrt(20)] -eps 2.0e-8
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