Case
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Parameter
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Description
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Any
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Natural
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The selected curve set is blended using the original curve parameterization.
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Any
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Arc Length
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The selected curve set is blended using arc length (constant speed) parameterization in which points at the same fraction of length on each curve correspond to each other.
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Only splines with an equal number of interpolation points
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Point to Point
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Each corresponding set of points is connected to create the surface.
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Any curve, curve chain, or composite curve having an equal number of entities or segments.
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Piece to Piece
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Each corresponding set of curve pieces is blended to create the surface.
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Two tangent continuous curves
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Developable
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Each corresponding set of control points is blended so that the surface can be flattened.
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![]() • Curves that are lines or arcs, whose parameterization is arc length by default
• Curves whose parameterization is close to arc length
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