tinyobjloader VS fast_obj

Obj file parsing isn't really OpenGL... But you can take a look at this GitHub project: https://github.com/tinyobjloader/tinyobjloader

For the Blender export part, the simplest 3D model format is OBJ. It's a text format that can be read in only ~100 lines of code. You can use Assimp for this. Or you can use something like tinyobjloader: https://github.com/tinyobjloader/tinyobjloader

I've replaced tinyobjloader with fast_obj which speeds up model loading process significantly. Here is a good article comparing different obj loaders.

I don't think this is an issue with tinyobjloader but I'm unsure of how to troubleshoot from here. I've been following this tutorial to learn opengl.

Exampes I've seen are the stb single header libraries, as well as tinyobjloader. The necessity to do this is usually written in the comments at the top of the header file:

If you´re using tinyobjloader, the documentation here https://github.com/tinyobjloader/tinyobjloader explains how it works. There´s even a triangulate flag.

Try Tiny obj loader: https://github.com/tinyobjloader/tinyobjloader

Also, it's possible to store a color per vertex, tinyobjloader supports this extended format for OBJ. But, like you say, how many (if any) OBJ loading programs actually support these vertex colors I suspect you can count on one hand (and more likely, zero hands). Blender, for example, does a terrible job even interpreting cutout objects in OBJ files, a common case (see step 9). I doubt they'd ever add per vertex color import support for any file format they read in. But, I'm interested to hear if they do - Blender is (by far, I believe) the main DCC app used with Mineways exports.

The operations you're talking about with the example of loading 3d data is the realm of parsing, and there's a LOT of theory available and a LOT of code available for how to implement things -- there are TONS of options. Since you don't know where to start you should investigate parsing generally in C. I highly recommend you take a look at an existing library in C that loads 3d data, like this library https://github.com/thisistherk/fast_obj/blob/master/fast_obj.h that deals with OBJ the format.

I've replaced tinyobjloader with fast_obj which speeds up model loading process significantly. Here is a good article comparing different obj loaders.

I wanted to say try writing your own like I did, then I remember I made it in c++ with string & stringstream std lib :(. I don't know how much would it take you to write it yourself, might try it myself. After a quick search I think this one has a pure c version: https://github.com/thisistherk/fast_obj

Oh I see. I was talking about writing a program in the language of your choice that does this, it's not very difficult. If you use C or C++ you can load the file with https://github.com/thisistherk/fast_obj to make it even easier.