Appendix B. The SBM File Format

The SBM model file format is a simple geometry data file format devised specifically for this book. The format is chunk-based and extensible, with several chunk types defined for use in the book’s examples. This appendix documents the file format. SBM files begin with a file header, followed by a number of chunks, each started with a header, followed by raw data that may be referenced by chunks. Multi-byte fields in structures are defined to follow little-endian byte ordering. All structures are tightly packed.

File Header

All SBM files start with a header of the following form:

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typedef struct SB6M_HEADER_t{    union    {        unsigned int    magic;        char            magic_name[4]; ...

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