Hi ga, Grasshopper merely calls Rhino functions for all intersections/ booleans. If it's busted in Grasshopper, it's busted in Rhino. Many Rhino functions output single surfaces (Loft, Sweep etc.), but when you run these commands in Rhino, you sometimes get polysurfaces. This was a mistake on my end; I forgot to 'fix' the surfaces if they had sharp creases. The new version of Grasshopper will output polysurfaces for all these components.
If you bake the shapes that go into the section component and perform an _Intersect in Rhino manually, do you get proper, closed sections? -- David Rutten [email protected] Robert McNeel & Associates On Feb 16, 2:56 am, ga <[email protected]> wrote: > Is anyone getting similar error in using the Section Node between a > BRep and a Plane? Following thread and image links below. The image is > from a simple tower exercise using a driver diagram in GH x4 to loft > into a tower. Then using regular interval sectioning, some sections > are incomplete and therefore not closed causing them to be skipped > downstream when using the planar surface node. The loft is understood > by GH as a "Untrimmed Surface." When baked, which is the surface to > the right, it is a polysurface and intersection or section commands > return closed curves. Any hints on why it is incomplete at some > intersections and not others? Could it be in the intersection > algorithm in GH? > > http://groups.google.com/group/grasshopper3d/browse_thread/thread/458... > > http://grasshopper3d.googlegroups.com/web/20090215_sectionError.jpg?g...
