Recently, in the follow-up of design materials, there is a curved surface area that needs to be split out for sticker coverage.
In the rhinoceros tried a variety of flat surface method, also tried to rebuild the surface method, found that the actual effect is not ideal. Either the surface contour is deformed and cannot fit the actual surface, or the surface is broken and broken.
1. If you want to get a complete flattened surface, the original surface must be a single surface with complete structural lines. The combined surface is difficult to get good flattening effect.
2. The surface that can be expanded can be expanded into a plane without error, such as cone, flat top cone and cylinder.
3. Try to flatten the single surface. If you want to flatten the hyperboloid, it is best to have a hyperboloid with large curvature in one direction and little change in curvature in the other direction. Although the software can expand the hyperboloid, there is a compound curvature relationship in the three-dimensional space of the double curvature, and the corresponding conversion method is used to correspond the three-dimensional coordinates to the two-dimensional coordinates, which cannot be expanded without loss.
4. Spheres and other surfaces with compound curvature cannot be flattened or "unfolded" without knowing the material properties (stretchable amount, etc.). Surfaces with curvature in both directions will have errors when unfolded, and only apply to materials with extension/contraction.