POSITION RULER

Purpose:

This function creates different kinds of rulers in model views and generates the complete dimensioning components automatically. The following types of rulers can be created:

• Base Line (BL)

• Center Line (CL)

• Frame Ruler (FR)

• Longitudinal Horizontal Ruler (LH)

• Longitudinal Vertical Ruler (LV)

Note that BL and CL are simply the lines of intersection between the Base/Center plane and the view plane. Nevertheless, BL and CL will be referred to as rulers in the following.

Instructions:

1. In the Annotate menu, click Position Ruler.

   The model view, the type of ruler to create, the location of the ruler (not BL/CL) and trimming of the ruler is defined by User, in that order.

2. Indicating the Model View:

   The model view in which to define the ruler is indicated by User. Normally, the view plane has to be one of the principal planes, that means, perpendicular to any of the cardinal axis; otherwise no ruler can be presented ambiguously. The exception is when the depth of the view plane is defined, as in Hull Views; here any orientation of the view plane will do.

   To remove a previously created dimensioning, click Edit, then Delete, then Last Entity.

3. Selecting the type of Ruler:

   Once the model view has been defined, the specific ruler to create in this view is selected from a dialog box. Note that only those rulers that can be presented ambiguously in the view are selectable.

4. Location of the Ruler:

   The system prompt is: Locate ruler (OC for positioning in BL/CL). A skeleton of the ruler is dragged (in direction perpendicular to the 'ruler' plane) into desired position by User. Note that BL/CL by definition has a fixed position in the view.

   The Frame Ruler is available also in a Body Plan View, however location is defined differently to other view types. The user is prompted to define a polyline that intersects the x-curves in the view. A frame annotation will be added at each intersection.

5. Trimming the Ruler:

   Once located, it is possible to adjust the length of the ruler. This is done by shortening or extending the ends of the ruler. When ready, click Operation Complete.

Options:

None.

Result:

A 3D Position ruler will be created in the current drawing, according to User's action.