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| In ], '''Transmigration operation''' means that changes in a part must be propagated to changes in other parts which have a dependence on the first. Put simply it means that if I move something, other things will be affected and must also be adjusted to preserve other established relationships. | |||
| This expression came into existance when parametric modelers like ] gained acceptance. Parametric modelers generate the ] from the ] representation and its associations, usually in the form of LISP expressions. | |||
| Here is the example which introduced me to the concept. Suppose one has 2 blocks of considerably different sizes. An ] is performed, subtracting the smaller block from a corner of the bigger one, and resulting in a block with a square corner removed. Now suppose that someone colors one of the edges of the block and stores that change. Now, if he goes back and moves the cutting block so that instead of cutting a side, he instead cuts in the center of the edge, creating a two edges, and reapplies those latter changes (colors). Those subsequent changes are associated with the entire two broken edges, rather than one of the cut edges. | |||
| NB: I don't know if this is the exact same nomenclaure used by ] and ]. | |||
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| http://www.solid-edge.com | |||
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