AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Openscad extrude along path4/15/2024 Note that when dealing with continuous curves it is always better to adjust the In arbitrary distribution of extra points. On each edge, but if you refine a profile with the "length" method you will get new pointsĭistributed around the profile based on length, so small segments will get fewer new points than longer ones.Ī uniform division may be impossible, in which case the code computes an approximation, which may result This means that if you refine a profile with the "segment" method you will get N points The segment method divides each segment of a profile into the same number of points. The length resampling method resamples proportional to length. Schemes using the sampling option, which you can set to "length" or "segment". Will multiply the number of points on your profile by N. To force (possibly additional) resampling of the profiles to increase the point density you can set refine=N, which Resampling may occur, depending on the method parameter, to make profiles compatible. To insert a different number between each pair. The slices parameter specifies the number of slices to insertīetween each pair of profiles, either a scalar to insert the same number everywhere, or a vector It is generally best if the triangles forming your polyhedronĪre approximately equilateral. Points on all of the profiles, and a large number of extra interpolated slices between the In order for skinned surfaces to look good it is usually necessary to use a fine sampling of Such a combination would create a triangular face at the location of the duplicated vertex.Īlternatively, skin provides methods (described below) for inserting additional verticesĪutomatically to make incompatible paths match. It is OK to pass a polygon that has the same vertex repeated, such asĪ square with 5 points (two of which are identical), so that it can match up to a pentagon. You can adjust non-matching polygons yourselfĮither by resampling them using subdivide_path() or by duplicating vertices using Or duplicate vertcies (insert edges of length 0) so that both polygons haveĭuplicating vertices allows two distinct points in one polygon to connect to a single point These cases: either subdivide edges (insert additional points along edges) Many interesting cases do not comply with this restriction. We must assume that profiles are aligned so that vertex i links to vertex i on all polygons. OK during preview or when rendered by itself.įor this operation to be well-defined, the profiles must all have the same vertex count and That the resulting polyhedron is free from self-intersections, which would make it invalidĪnd can result in cryptic CGAL errors upon rendering with a second object present, even though the polyhedron appears The profiles can be specified either as a list of 3d curves or they can be specified asĢd curves with heights given in the z parameter. If called as a module, creates a polyhedron Each profile should be roughly planar, but some variation is allowed.Įach profile must rotate in the same clockwise direction. Optionally the first and last profiles can have endcaps, or the first and last profilesĬan be connected together. Given a list of two or more path profiles in 3d space, produces faces to skin a surface between vnf = skin(profiles, slices,, ,, ,, ,, ,).See Also: sweep(), linear_sweep(), rotate_sweep(), spiral_sweep(), path_sweep(), offset_sweep() Synopsis: Connect a sequence of arbitrary polygons into a 3D object. Section: Skin and sweep Function/Module: skin() texture() – Produce a standard texture.associate_vertices() – Create vertex association to control how skin() links vertices. rot_resample() – Resample a list of rotation operators.slice_profiles() – Linearly interpolates between path profiles.subdivide_and_slice() – Resample list of paths to have the same point count and interpolate additional paths.Section: Functions for resampling and slicing profile lists sweep() – Construct a 3d object from arbitrary transformations of a 2d polygon path.path_sweep2d() – Sweep a 2d polygon path along a 2d path allowing self-intersection.path_sweep() – Sweep a 2d polygon path along a 2d or 3d path.spiral_sweep() – Sweep a path along a helix.
0 Comments
Read More
Leave a Reply. |