Thanks, Cliff! This test geometry is really helpful. :)
> A raytrace indicates the complex surface structure is there, but > unfortunately the shaded display code is showing flat planes for both > surfaces, not just the one that's supposed to be flat... Although the shaded display code doesn't work for that, we can still use the brep command: brep surface_1.s plot S 0. It displays the surface correctly in the wire frame. > Wu, I'm not quite sure what the "correct" command to test these two surfaces > for intersections would be (the only attempt I've made thus far crashed) but > if these turn out to be useful test cases feel free to add them to the test > NURBS geometry in the source tree. (dbconcat will be useful for that) It does crash because of a bug in sub_curve(). After fixing the bug, it can give us what we want. As the overlap SSI code is still working in process, we cannot get the correct finally result yet, but I can show the intersections in 2D (See the attached image, and the 2D intersections on both surfaces are the same.) Cheers! Wu
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