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About the developer

syoyo
267 Stars 35 Forks 76 Commits 13 Opened issues

Description

Header only tiny wavefront .obj loader in pure C99

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tinyobjloader in C

Tiny but powerful header only wavefront obj loader written in C99.

If you are looking for C++ version, please see https://github.com/syoyo/tinyobjloader

Current status

Experimental. Loading geometry data would be OK, More testing required for materials and shapes.

Features

  • Single file, header only
  • Dependency-free pure C99 implementation(except for
    libc
    )
  • Provides mostly similar functionality as in C++ version. https://github.com/syoyo/tinyobjloader
  • Moderate speed and moderate memory consumption
    • Rungholt 7M triangle scene(260 MB) can be loaded in 4.7 secs and consumes 3.6 GB memory at the maximum on MacBook12 Core m5 1.2 GHz(single core use)
  • Unit tests using acutest thanks to @andystanton

Usage

Copy

tinyobj_loader_c.h
to your project.
/* define TINYOBJ_LOADER_C_IMPLEMENTATION for only *one* .c */
#define TINYOBJ_LOADER_C_IMPLEMENTATION
#include "tinyobj_loader_c.h"

...

See

examples/viewer/
for more details.

tinyobjloader allocates memory. To replace the functions used for allocation, define

TINYOBJ_MALLOC
,
TINYOBJ_REALLOC
,
TINYOBJ_CALLOC
and
TINYOBJ_FREE
in the .c file you defined
TINYOBJ_LOADER_C_IMPLEMENTATION
in, before including
tinyobj_loader_c.h
. Define either all or none of them. They replace
malloc
,
realloc
,
calloc
and
free
respectively.

Example: ```

define TINYOBJLOADERC_IMPLEMENTATION

define TINYOBJMALLOC mymalloc

define TINYOBJREALLOC myrealloc

define TINYOBJCALLOC mycalloc

define TINYOBJFREE myfree

include "tinyobjloaderc.h"

## Tests

The single header test library acutest is used to provide a test runner and assertion macros. There are two test suites: one for the API and one for the internal functions. Ultimately the internal tests should be removed, but are useful while the project is volatile.

The tests can be run from the project root using:

$ make test ```

This builds and executes a binary called

tinyobj_tests
in the test folder. There are some options to run specific tests that can be passed to the executable directly that are described on the acutest readme.

By default acutest forks for each test. To disable this for debugging purposes, you can pass the switch

--no-exec
to
tinyobj_tests
.

License

MIT license.

Third party licenses

  • acutest Another C/C++ Unit Test facility. MIT license. http://github.com/mity/acutest

TODO

  • [ ] Windows build?

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