STL File Format (Ascii)

In principle a STL file may look like this :

Example: 


solid   testsphere

  facet normal -0.13 -0.13 -0.98

    outer loop

      vertex 1.50000 1.50000 0.00000

      vertex 1.50000 1.11177 0.05111

      vertex 1.11177 1.50000 0.05111

    endloop

  endfacet

  facet normal  0.13  0.13 -0.98

    outer loop

      vertex 1.50000 1.50000 0.00000

      vertex 1.50000 1.88823 0.05111

      vertex 1.88823 1.50000 0.05111

    endloop

  endfacet

  facet normal -0.13  0.13 -0.98

    outer loop

      vertex 1.11177 1.50000 0.05111

      vertex 1.50000 1.88823 0.05111

      vertex 1.50000 1.50000 0.00000

    endloop

  endfacet

  

  ...

  ...

  ...

  ...

  ...

    

  facet normal -0.13 -0.13  0.98

    outer loop

      vertex 1.50000 1.50000 3.00000

      vertex 1.11177 1.50000 2.94889

      vertex 1.50000 1.11177 2.94889

    endloop

  endfacet

  facet normal  0.13  0.13  0.98

    outer loop

      vertex 1.50000 1.50000 3.00000

      vertex 1.88823 1.50000 2.94889

      vertex 1.50000 1.88823 2.94889

    endloop

  endfacet

endsolid