The core parser header. It defines all glTF data structures, provides cgltf_parse, cgltf_parse_file, cgltf_load_buffers, cgltf_validate, cgltf_free, and various accessor and node utility functions. The implementation is guarded by CGLTF_IMPLEMENTATION and includes an embedded JSMN JSON parser for tokenizing glTF JSON. The code demonstrates careful memory management, pointer fixup for cross-references, efficient sparse accessor handling, and comprehensive validation. It is a model of a single-file C library, self-contained with no external dependencies beyond standard C headers.

The writer header, which includes cgltf.h and provides cgltf_write_file and cgltf_write. It serializes a cgltf_data structure back to JSON or GLB format. It handles all supported extensions, texture transforms, material properties, and emits properly formatted JSON. The writer uses a context struct with a buffer cursor and formatting macros, ensuring correct indentation and comma placement. It demonstrates how to robustly serialize complex nested data structures to a stream with memory constraints.