STL file

STL file: 3D model in digital form
The STL file is a special file format that is used to store three-dimensional models. Imagine how you create a complex plasticine figure. The STL file is like a detailed instruction describing this figure in digital form, in the form of many triangles. Each triangle sets its peaks, forming, in aggregate, the surface of your object.
What is inside the STL file?
Inside the STL file, information about the geometry of the 3D model is stored, without information about materials, colors or other characteristics. It is like a drawing showing what the form looks like, but not talking about what it is made of. It contains only accurate coordinate information about each point of triangles that form a model. Due to the simplicity of the structure, the STL files are very common and are easily read by various programs and 3D printers.
Why do you need a Stl file?
STL files are indispensable for 3D printing. The 3D printer reads these files, a layer by a layer creating a physical object corresponding to the model described in the file. In addition to printing, STL files are used in other areas, for example, to visualize models in computer graphics programs, for modeling and analyzing mechanisms or for data exchange between different design systems. Simply put, this is a universal language for the exchange of 3D models, understandable to both computers and other software. You can share your model with friends or colleagues, without worrying about whether the other person can open and use it.