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Distributed history enables part history. After distribution is set (either on or off) it cannot be changed. Distributed history is off by default, and the first bulletin created in for a part's history stream locks it this state.
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; part:new
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; Define a new part
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(define my_part (part:new))
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;; my_part
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; Define a new view for the part
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(define my_view (view:dl my_part))
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;; my_view
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(env:set-active-part my_part)
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;; ()
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(part:set-distribution-mode #t)
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;; #t
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To use distributed history after it is enabled, create model geometry. At some point in the modeling, name it using
roll:name-state. From that state, you can roll to some previous state using
roll. Any new modeling operations performed from this state on are created in a new branch.
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; roll:name-state
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; Define a new part
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(define my_part (part:new))
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;; my_part
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; Define a new view for the part
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(define my_view (view:dl my_part))
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;; my_view
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(env:set-active-part my_part)
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;; ()
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(part:set-distribution-mode #t)
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;; #t
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(define my_sph1 (solid:sphere (position 0 0 0) 10))
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;; my_sph1 => #[entity 1 1]
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(define my_sph2 (solid:sphere (position 5 10 20) 10))
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;; my_sph2 => #[entity 2 1]
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; Name the current state.
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(roll:name-state "first_branch")
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;; "first_branch"
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; roll back to before this creation
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(roll "start")
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;; 2
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; Any modeling created from now on goes into a
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; new history stream.
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(define my_block (solid:block
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(position -5 10 -20) (position 5 -10 20)))
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;; my_block => #[entity 3 1]
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; Name the current state.
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(roll:name-state "second_branch")
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;; "second_branch"
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(roll "first_branch")
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;; 3
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(roll "second_branch")
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;; 3
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