Amapi 3D

18.5.10 Double Sweeping


The Double-Sweep tool is used to generate a surface from a section (2D or 3D curve, open or closed) and two profiles (open 2D or 3D curve). The profile with the higher number of points will determine the number of sections of the final object. You can thus create in a single operation, asymmetrical objects, such as horns, tubes with variable diameter, helicoid surfaces, and more. This tool works also in NURBS mode and will generate NURBS surfaces if the section is a NURBS curve.

Usage:

1. Creating the section and the two profiles.

Create a section and two profiles. Each profile must share a common point with the section and preferably be perpendicular to the section.

¨ Both profiles must be either closed or open.
¨ Each profile must share a common point with the section.
¨ The two profiles must not share the same common point with the section.

2. Selecting the current object.

Click on the curve you want to designate as the section using the Wand.

3. Selecting the Double-Sweep tool.

Click on the icon depicting the Double-Sweep tool in the Construction Palette.

4. Selecting the two profiles.

Select each profile one after another: the surface is generated.

5. Changing the section orientation (optional).

You can change the sections’ position, as previously described in the chapter User Manual/Tools/Construction/Sweeping/General principles of positioning, orienting, and deforming sections.

6. Capping the openings (optional).

If the original Section was a closed curve, the resulting object will have two openings, highlighted in red. Click on the opening you wish to cap using the Wand. Go to the next step if you want to leave them open.

7. Ending the tool action.

Put the tool aside to end the action (depending on the interface). See chapter User Manual/Tools/Generic use of a tool/How do you end a tool action?

Practical exercises:
· A mouse on a piece of cheese/The mouse/Steps 1, 2 and 4