This manual specifically documents only the C3D file format, and while other members of the family (parameters files etc.) will be briefly introduced, it is not the intention of this author to provide documentation on every member of the ADTech file format family.
The data values in C3D files are stored in either 16-bit signed integer format, or optionally floating-point format. The format of the data can be determined by reading the header of the C3D file at a binary level without making any assumptions about the data format. For compatibility with Fortran, and various operating systems, all C3D files should be thought of as consisting of blocks that are 512 bytes long (or 256 16-bit words).
All C3D files contain a minimum of three sections of information:
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A single, 512 byte, header section |
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A parameter section consisting of one, or more, 512-byte blocks. |
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3D point/analog data section consisting of one, or more, 512-byte blocks. |
Figure 1 – The basic C3D file structure.
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