solid name ... facet normal ni nj nk outer loop vertex v1x v1y v1z vertex v2x v2y v2z vertex v3x v3y v3z endloop endfacet ... endsolid name
struct STL_header_s { uint8_t void[80]; uint32_t nb_triangles; } struct STL_triangle_s { float n[3]; float v1[3]; float v2[3]; float v3[3]; uint16_t count; }