The following group codes apply to lofted surfaces.
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Lofted Surface group codes
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Group code
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Description
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100
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Subclass marker (AcDbLoftedSurface)
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40
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Transform matrix of loft entity (16 reals; row major format; default = identity matrix)
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Entity data for cross sections
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Entity data for guide curves
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Entity data for path curves
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70
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Plane normal lofting type
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41
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Start draft angle (in radians)
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42
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End draft angle (in radians)
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43
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Start draft magnitude
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44
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End draft magnitude
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290
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Arc length parameterization flag
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291
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No twist flag
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292
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Align direction flag
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293
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Create simple surfaces flag
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294
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Create closed surface flag
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295
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Solid flag
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296
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Create ruled surface flag
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297
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Virtual guide flag
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