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The option
end_draft_dist specifies an offset distance (a real number) for the swept surface in the plane where the sweep ends. It is similar to
draft_angle, except that an offset distance is used instead of an angle. The larger the defined offset, the wider the draft distance. The default of 0 creates a swept surface parallel with the path. A negative offset creates a swept surface which is closer to the path at the end than at the beginning.
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Scheme Example
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; end_draft_dist
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(define path (edge:linear (position 0 0 0) (position 0 0 10)))
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(define profile (edge:circular (position 0 0 0) 5))
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(roll:name-state "original")
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(define opts (sweep:options "end_draft_dist" 5))
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(define sweep (sweep:law profile path opts))
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(entity:set-color sweep 3)
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; OUTPUT Positive Draft
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(roll "original")
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(render:rebuild)
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(define opts (sweep:options "end_draft_dist" -5))
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(define sweep (sweep:law profile path opts))
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(entity:set-color sweep 3)
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(render:rebuild)
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; OUTPUT Negative Draft
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Example 1-13. Defining Offset Distance
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Figure 1-18. Sweeping with positive and negative Offset Distances
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