rapidobj
tinyobjloader
rapidobj | tinyobjloader | |
---|---|---|
5 | 8 | |
161 | 3,157 | |
- | 0.8% | |
5.9 | 0.0 | |
2 months ago | 3 months ago | |
C++ | C++ | |
MIT License | GNU General Public License v3.0 or later |
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rapidobj
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C++ Show and Tell - December 2022
I wrote a rapidobj library for parsing Wavefront .obj files. It's an old text format for 3D data. This library was optimised to quickly process large files (see benchmarks); it can parse millions and even tens of millions of triangles per second.
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rapidobj: a fast .obj parser library
I just released rapidobj v1.0. It's a fast .obj file parser. May be useful to those who need to quickly load large .obj models (of course, you will still need to transform the data into something that's GPU friendly). Third party benchmarks: https://aras-p.info/blog/2022/05/14/comparing-obj-parse-libraries/
- RapidObj v0.1 - A fast, header-only, C++17 library for parsing Wavefront .obj files.
- RapidObj - Quick Loader/Parser for Wavefront .obj Geometry Files
- RapidObj v0.1 - First Public Release
tinyobjloader
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Open GL tutor request
Obj file parsing isn't really OpenGL... But you can take a look at this GitHub project: https://github.com/tinyobjloader/tinyobjloader
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From Blender to OpenGL
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
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[Part 5] Update of my Vulkan toy renderer: Meshlet cone culling, fast_obj, Vulkan dynamic rendering and many more
I've replaced tinyobjloader with fast_obj which speeds up model loading process significantly. Here is a good article comparing different obj loaders.
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Texture UV issue
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.
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oof: real-time, full-color console output for C++
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:
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How can I get Triangles from OBJ files?
If you´re using tinyobjloader, the documentation here https://github.com/tinyobjloader/tinyobjloader explains how it works. There´s even a triangulate flag.
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Is there a simple and reliable static object loader out there?
Try Tiny obj loader: https://github.com/tinyobjloader/tinyobjloader
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Baking Lighting Data and Color Variations to Vertex Colors
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.
What are some alternatives?
fast_float - Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12 and WebKit/Safari
assimp - The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure.
AutoGeodesics - Easily integrate the geodesics equation using automatic differentiation.
stb - stb single-file public domain libraries for C/C++
Vcpkg - C++ Library Manager for Windows, Linux, and MacOS
oof - Convenient, high-performance RGB color and position control for console output
earcut.hpp - Fast, header-only polygon triangulation
mp-units - The quantities and units library for C++
indicators - Activity Indicators for Modern C++
3DWorld - 3D Procedural Game Engine Using OpenGL
Yave - Yet Another Vulkan Engine
termtosvg - Record terminal sessions as SVG animations