Creating a Revolution Surface

Click Revolve in the Sweep Primitives sub-toolbar.

The following icons let you:

• reframe on the drawing view
• select a new plane of drawing
• add points to the curve being created (it is selected by default)
• manipulate the points
• align the points
• add weight to the points
• erase a point
• pick a point
• close the curve
• fill the top, bottom or both ends of an open surface
• apply the command

Click Add Point if not already selected to begin drawing the curve.

Click to add points and draw the curve. The entire curve is drawn so that all options available in Tools Palette can be described in this section.

• The created points define the polygon of the curve of subdivisions.
• The surface can be previewed as the points are created.
• When a point is added, it can be moved as long as you keep the left mouse button pressed.

Click Plane Selection to change the drawing plane.

The Tools Palette is modified to this only one icon, that is selected by default.

Select the new plane.

Add a new point on existing curve by clicking the left mouse button at the required position. The point can be previewed on the existing curve. Once the point is created the surface is immediately previewed.

Click Move Point to move the point. The point closest to the mouse is manipulated.

When this command is activated, four new icons appear in the Tools Palette.

They let you:

• set the attenuation factor.

  For more information about setting attenuation, refer to Setting the Attenuation Factor.

• allow the selection of edges for manipulation.
• allow the selection of point for manipulation.
• move the point or edge using the manipulator. This icon is not selected by default, i.e. the manipulators are in OFF state. When selected, i.e. manipulators are in ON state, its display is modified to .

  Important: If a single point is selected, the manipulator is positioned on the point. If a single edge is selected, the manipulator is positioned at the center of the edge. If multiple points or edges are selected, the manipulator is positioned on the barycenter of the selected points. To move the point, hold down the left-mouse button and drag the manipulator to the desired location. The direction of displacement is defined by the axis selected on the manipulator. For horizontal displacement, select the X' axis, for vertical displacement, select the Y' axis and for planar displacement select the X'Y' arc.

To move the point, select the point and either:

• manipulate keeping the left mouse button pressed.
  
  
• click Manipulator On/Off to activate the ON state and drag the manipulator to move the point.
  Single point selected
  
  
  Multiple points selected
  
  
  Multiple edges selected
  
  

Optional: Select the point and click Pick a Point . You can select a previously created point.

The selected point is moved to the projection of the picked point in the drawing plane.

Selection of a point

Picking of an existing point

Manipulation of the selected point

Click Align Point to align a point or an edge horizontally and vertically.

When this command is activated, three new icons appear in the Tools Palette.

They let you:

• allow the selection of edges
• allow the selection of points
• align the point or edge using the manipulator. This icon is not selected by default, i.e. the manipulators are in OFF state. When selected, i.e. manipulators are in ON state, its display is modified to .

  Important: The alignment using a manipulator is possible when at least two points are selected. The manipulator is positioned on the barycenter of the selected points. To align, click on the required interactive arrow.

Move the cursor over the point you want to align. The segment closest to the mouse is highlighted. Horizontal and vertical segments are seen.

Click the left mouse button. The point close to the mouse is fixed. The second point moves along the horizontal or vertical segment. In this case the point above the selected point has moved down.

The choice of horizontal or vertical segment is automatic and the chosen direction depends on the smallest angle of rotation.

Optional: Select two or more points and click .

Click on the interactive arrow to align the point.

For points:

Multiple points selected

Manipulation of points

For edges:

Multiple edges selected

Manipulation of edges

Click Attraction to add weight to the point or the edge.

Three new icons are added to the Tools Palette. They let you:

• select edges for the alignment
• select point for the alignment
• define the attraction mode. This icon has two states: the default state gives a sharp edge and the smooth state (activated when clicking the icon) gives a smooth edge.

Select the point or the edge.

A slider indicating the value of the weight is displayed on the right of the screen and can be changed between 0 and 100.

Hold the left-mouse button and move the mouse to reach the desired value on the weight slider. Release the left-mouse button when you are satisfied with the weight added to the surface.

Click Erase Point to delete a point or an edge.

Select a point or an edge.

The selected element is deleted.

Click Close Curve to close the curve.

The icon has changed to .

Open curve

Closed curve

Closed curve in another view

Click Close Curve again to open the curve.

Click Drawing view reposition the view to the drawing view, that is the plan.

Press and hold down the right and middle mouse buttons to rotate and change the view to see the number of sections and angular modification options. The Tools Palette is modified in the appropriate view.

A slider is displayed at the right of the screen to let you define the sections between 4 and 32.

You can either:

• drag the slider to the desired value to change the number of sections:
  
  

• hold down the left-mouse button and drag to modify the angle of the revolvution surfaces. Two angles can be set, either clockwise or counterclockwise. Double-click to reset the value to 0.

  
  
  
• click Rotation Edition to open the Revolve Data dialog box and enter the number of sections, start and end sector angle values or use spinners to change the value. The field dynamically updates whenever you move the slider and vice-versa.
  
  

  Click OK when done.

Click Fill Side to close open ends of the surface. The fill side icon has four states:

• : default state. The top and bottom sides of the surface are open.
• : the top side of the surface is closed.
• : the top and bottom sides of surface are closed. For instance:
  
  
• : the bottom side of the surface is closed.

The fill behavior can be set or unset by clicking directly on either side of the revolution axis:

Click on side of the revolution axis

The fill behavior is set on the top side

To go back to the drawing view (i.e. the plan), click Drawing view .

Click Apply (Enter) to create the revolution surface.

The Modification command along with the Tools Palette is automatically activated, allowing you to manipulate the surface.

The final surface without any manipulation is as below: