7/13/2023 0 Comments Mesh unfolder sampleThis is the system that Rhino uses for storing mesh data. Then faces have a list of numbers that index into those vertices, for example you may have a list of 4 vertices, and then 2 faces that index them. I'll try to explain the difference between "per face" and "per vertex" type systems here, but it will be a bit complex since it involves the actual structure of the data.īasically the "per vertex" system means that there is a list of vertices each of which contains a 3d point, uv texture point, and a vertex normal for shading. So in order to emulate the per-face attributes that are generated when you export a welded OBJ file from MoI, it is going to make duplicated points at import time rather than keeping the original unifed point structure, because the unified structure is not possible for it to hold with its system of defining meshes. Hi Micha - the basic problem that you are seeing when importing into Rhino is that Rhino does not support "per face" attributes, it only supports a single vertex list of attributes. PS: The links to the Rhino forum welding threads: Here a screenshot of Unfold3D - I can free choose, where I set the cuts. ![]() Could you help please? How can this be done? Some weeks befor I ask at the Rhino forum for that feature, but the developer don't know, how to get a welded mesh without smoothing effect. But once loaded to Rhino, I can't use the meshes at Unfold3D again like I used it direct from MoI to Unfold3D. My problem is, that I use MOI3D to mesh NURBs objects for rendering. (MOI3D meshes are great for unfolding.)Ĭould you explain, why MOI meshes are welded but show no smoothing effect, if I open the mesh at Rhino? Interesting is, if I import a MOI obj mesh to Rhino and export it to Unfold3D later, than the nice welding without smoothing is gone, all edges are unwelded and the unfold dosn't work anymore. That's great, now Unfold3D is full useable. Now I found, that MOI OBJ export meshes are welded without additional smoothing effects and I can free set cuts and uncuts at Unfold3D. And this is the problem for CAD models most, because the mesh edges of a cube are unwelded most and if I would weld it at Rhino, than the cube looks extrem smoothed. The user can uncut the cut only, if the original imported mesh was welded at this edge. If he set a cut, than the mesh edge is unwelded. What do it means? If a mesh is loaded to Unfold3D, than the user can set cuts/uncuts for unfolding. The downside of Unfold3D is, it is not optimized for CAD user. ![]() Have fun, script is pretty slow so don’t try it on something with more than 2k faces.For better texturing I use the mesh unfolder Unfold3D - it's one of the easiest unfolder. Just added a Flipping Cards option you can test with two sided materials… run both operators with this setting enabled. There are two operators, first one to separate and rig the faces, the other is useful to animate bones, it will work here but also on an armature from the skin modifier or many other bones hierarchies. The idea of using bones is from the amazing scripts by Emu, in fact you can animate the meshes unfolded and rigged with those scripts with this little tool. ![]() Hi here is a script to simulate an unfolding effect for the faces of a mesh… it separate the faces and place bones on them.
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