loadModel changed to accept STL files

[jeremydouglass]

Nature of issue?

• New feature request

Which platform were you using when you encountered this?

• Desktop/Laptop

New feature details:

The STL file format (stereolithography files) are an old lowest-common-denominator ASCII-based format used in 3D modeling and 3D printing. It would be nice to support loading them through loadModel().

This would be analogous to the previously added feature of "Loading 3d Objects from OBJ" (#904) only for the simple STL file format instead.

In Processing(Java), STL support is implemented in the third-party toxiclibs library, the STLReader class, under the loadBinary method.

See a previous discussion of p5.js STL support on the forum here: https://forum.processing.org/two/discussion/18812/import-stl

[stalgiag]

Just putting a note here that the ThreeJS implementation of this loader is already fairly close to something that would work for us.

[sanketsingh24]

@stalgiag Shall I work on this issue? I want to take this up.

[stalgiag]

Sounds good @sanketsingh24 !

[sanketsingh24]

I have one doubt, what does uvs do here?

EDIT: I mean, not exactly there, but in general what are uvs for?

[Spongman]

uv usually refers to texture coordinates: https://en.wikipedia.org/wiki/Texel_(graphics), https://en.wikipedia.org/wiki/UV_mapping