Trefunknot, the small

thingiverse

It appears that you've provided a comprehensive tutorial on how to create a 3D model of a trefoil knot using Surface Evolver and Blender. Here's a summary of the steps: 1. **Create a grid**: Start by creating a rectangular grid with a specific number of vertices, edges, and faces. 2. **Define constraints**: Specify constraints on the surface, such as fixing certain vertices or edges to maintain the shape of the trefoil knot. 3. **Optimize the surface**: Use Surface Evolver's built-in optimization algorithms to minimize the area of the surface. 4. **Refine the mesh**: Use commands like "refine edge where fixed" and "r" to refine the mesh and obtain a smoother description of the trefoil knot and unknot. 5. **Create a gogo procedure**: Write a user-defined procedure that performs multiple iterations of optimization, refinement, and other operations to finalize the surface. 6. **Save as STL file**: Use the command "binary_stl >>>" to save the final mesh as an STL file. Then, in Blender: 1. **Import the STL file**: Import the STL file into Blender. 2. **Extract the surface boundary**: Select non-manifold edges, duplicate, separate, and transform them into a curve. 3. **Extrude a circle along the curve**: Create a circle of suitable thickness and extrude it along the curve to define a round border. 4. **Apply the Solify modifier**: Use the Solify modifier to give the same thickness to the surface. Finally, you can 3D-print your trefoil knot using a Fused Filament Kossel printer or order an inexpensive bronze-infused steel version from Shapeways. Kudos on creating such an intricate and beautiful model!