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The
ACIS version number for subsequent save operations is set using the function
set_save_file_version, which takes two arguments, a major version and a minor version.
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Throughout the system, all entity
save functions, and related functions for curve, surface, etc., take into account the version number. This is the global value,
save_version_number, which gives the version of save file format being written. This can be used to produce a save file in a previous version's format.
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Objects can be modified to be compatible with an earlier version. This may or may not result in loss of information. If the modification involves loss of information or a possible error in the resulting save file, a warning is generated, but the save file is still produced.
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When restoring objects with shared subtypes, such as
int_cur or
spl_sur, from a save file in which they are not shared, the default is to share identical sub-objects rather than to leave them unshared.
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Note
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The restore of pre-Release 1.6 save files causes the coedges in the entity restored to be ordered counterclockwise about their edge.
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The version number is normally the current version, but the version may be set backwards to simulate save files generated by previous versions. A major version of 0 or less causes the version to default to the current
ACIS version.
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Set the save file version number:
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void set_save_file_version(
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int = 0,
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// major version number
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int = -1
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// minor version number, default gives
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// error unless major version is zero
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);
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