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Unfolded curve |
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To unfold a curve onto a plane, use the command Unfolded curve 
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Step-by-step instructions
1.Specify a cylindrical or conic face in the graphic area. The name of the specified object is displayed in the Surface field on the Parameter panel.
2.Specify the objects that need to be unfolded. The curves lying on the specified face can specified, the edges of this face, as well as points belonging to the face.
The specified objects are highlighted in the graphic area, and their names are displayed in the Curves/points field on the Parameter panel.
3.Specify the plane on which the curve (curves) needs to be unfolded, using one of the following methods:
•Specify a flat face or plane in the graphic area that is tangent to the specified face. The plane can also be placed in such a way that it can be transformed into a plane tangent to this face by a parallel movement.
•Build an auxiliary plane of the required position. To do this, press the Draw plane button 
to the right of the Scan plane field.
The name of the specified object is displayed in the Scan plane field.
A phantom of the unfolded curve (curves) is displayed in the graphic area.
The operation cannot be performed if the selected surface is not developable. In this case, the phantom is missing.
4.If the selected surface is closed, the Surface cut line group is present in the Parameters panel, and a cut line phantom is displayed on the surface in the graphic area. At the intersections with this line, the curve will be split before unfolding.
Set the position of the surface cut line. To do this, select the offset method using the Offset button group and set the parameter for the selected method:
By surface parameter — enter the offset value as a percentage in the field %,
By central angle — enter the offset value in angular units in the Angle field (this option is available if the selected face is cylindrical or conical).
You can switch between options during construction. The offset value will be recalculated and displayed in units corresponding to the selected option.
5.If necessary, specify a name, color and display parameters of unfolded curve. The Properties section is used for this.
6.To complete operation of the command, click Finish button 
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An unfolded curve appears in the graphic area, and an object with an icon appears in the Design tree and subordinate objects by the number of individual contours within the curve.
7.To complete the command, click the Finish button.
See Also
Notes on working with curves that have subordinate curve objects
