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MGED CMD copyeval - Revision history
2024-03-28T22:36:31Z
Revision history for this page on the wiki
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https://brlcad.org/w/index.php?title=MGED_CMD_copyeval&diff=2147&oldid=prev
Ssd at 05:07, 4 January 2010
2010-01-04T05:07:10Z
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Ssd
https://brlcad.org/w/index.php?title=MGED_CMD_copyeval&diff=1925&oldid=prev
Ssd at 13:51, 20 November 2009
2009-11-20T13:51:47Z
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Ssd
https://brlcad.org/w/index.php?title=MGED_CMD_copyeval&diff=726&oldid=prev
Dloman at 11:25, 18 August 2008
2008-08-18T11:25:16Z
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Dloman
https://brlcad.org/w/index.php?title=MGED_CMD_copyeval&diff=725&oldid=prev
Dloman: New page: Category:MGED {=copyeval= __TOC__ ==Syntax== :copyeval new_primitive path_to_old_ primitive ==Argument(s)== : '''new_primitive''' :: Name for new primitive : '''path_to_old_primit...
2008-08-18T11:24:45Z
<p>New page: <a href="/wiki/Category:MGED" title="Category:MGED">Category:MGED</a> {=copyeval= __TOC__ ==Syntax== :copyeval new_primitive path_to_old_ primitive ==Argument(s)== : '''new_primitive''' :: Name for new primitive : '''path_to_old_primit...</p>
<p><b>New page</b></p><div>[[Category:MGED]]<br />
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{=copyeval=<br />
__TOC__<br />
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==Syntax==<br />
:copyeval new_primitive path_to_old_ primitive<br />
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==Argument(s)==<br />
: '''new_primitive'''<br />
:: Name for new primitive<br />
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: '''path_to_old_primitive'''<br />
:: Path to existing primitive<br />
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==Return Value(s)==<br />
: No Return Values for this command.<br />
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==Description==<br />
Objects in a BRL-CAD model are stored as Boolean trees (combinations), with the members being primitive shapes or other Boolean trees. Each member has a transformation matrix associated with it. This arrangement allows a primitive to be a member of a combination, and that combination may be a member of another combination, and so on. When a combination is displayed, the transformation matrices are applied to its members and passed down through the combinations to the leaf (primitive shape) level. The accumulated transformation matrix is then applied to the primitive before it is drawn on the screen. The "copyeval" command creates a new primitive object called new_ primitive by applying the transformation matrices accumulated along the path_to_old_primitive to the leaf primitive shape object at the end of the path and saving the result under the name new_ primitive. The path_to_old_ primitive must be a legitimate path ending with a primitive shape.<br />
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==Example(s)==<br />
: '''mged&gt;''' copyeval shapeb comb1/comb2/comb3/shapea<br />
:: Create shapeb from shapea by applying the accumulated transformation matrices from the path comb1/comb2/comb3.<br />
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==See Also==<br />
: No related commands.<br />
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----<br />
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Page Generated by David Loman on: 10/11/2007 at: 12:08:15 PM</div>
Dloman