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CAD tip CAD tip # 12454:

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Standard AutoCAD support parametric Bézier curves and Bézier 3D surfaces.

The shape of Bézier curves and surfaces is controlled by control vertices, CVs. You can also define the Degree of the curve, by default the 3rd degree (cubic curves). The degree of a Bézier curve is the number of its control vertices minus 1.

Bezier curve, vertex:6

You can create a Bézier curve from any polyline or spline using the CVREBUILD command.In the dialog "Rebuild curve", set the Degree to the "number of CVs - 1". You can also preset the curve degree with the REBUILD2DDEGREE variable. The maximum is 11, i.e. for curves with up to 12 control vertices.

You can also directly draw a Bezier curve with the command SPLINE with the options Method > CV and Degree > 3/4/5....

NURBS

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29.12.2019    27080×  
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