We can make a shell out of this surface as follows. Notice that this mesh has no thickness, so it cannot yet be used to make a solid 3D print. We can make use of the function DELAUNAY to create a Delaunay triangulation of the rectilinear mesh. The first step in translating a matrix-based plot into an STL-file is to break up each square element in the mesh into two triangular elements. n = 12 % number of partitions in each dimension. Consider the surface plot of the MathWorks logo, based on the L-shaped membrane. The most natural way to create surface plots in MATLAB is to use a matrix of height values.
It is worth noting that depending upon the type of printer being used, the orientation of the surface may factor into the quality of the print.
Many 3D printers come with their own slicing program to perform this translation, so we will not address this stage. Vertex 7.9166667E-01 2.0833333E-01 8.6090207E-01īefore being useful for a 3D printer, a surface described by an STL-file must be sliced into layers defining the path traced out by the printer. Here is an excerpt from an ASCII STL-file: facet normal nx ny nz These files consist of a list of triangles, with each triangle described by the cartesian coordinates of its three vertices and a normal vector oriented outward from the closed surface. STL-files describe a closed surface in terms of triangular faces.
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