Refactored several functions, new documentation and support for new parameters

[panikon]

Good afternoon,
I'm not sure if these changes can be of any use to the project, I made most of them when I was studying the current codebase.

Heavily modified tinyobj version

• Fully documented using NaturalDocs
• No limit to number of supported faces
• Revamped command structure
• Refactored several functions
• All supported 'objects' have their own structure
• tinyobj_attrib_t not compatible with older versions, use COMPATtinyobj_attrib_t instead
• Added more error return codes
• Correctly identifies unknown commands
• UTHash support

New feature support:

• Added point (p) and line (l) support
• Added Parameter space vertex (vp) support
• Smoothing groups (s) support

[syoyo]

Super awesome! Changes are a lot, so require some time to review it.

[syoyo]

It looks code itself works file, but I got some Makefile error in Linux environment.

Also, -ansi does not work well for C99 code in gcc(we need to use -std=c99 solely).

https://gcc.gnu.org/onlinedocs/gcc/Standards.html

What is your compiler/os environment?

[panikon]

I didn't test the code in Linux environment and don't recall changing the Makefile, maybe the error is related to the way that CMake generates new makefiles?
I'm currently in Windows 7 64bit and tested using msvc 10 and 19.

[syoyo]

I'm currently in Windows 7 64bit and tested using msvc 10 and 19.

I see. Makefile was the existing one(contributed by someone, not me). I will refactor Makefile and CMakeLists so that it runs on Linux and macOS