LINE MORPHING
This function is used to modify a line by moving a control point on the line. The morphing operation is described in the following steps.
1. Select a line using the function provided in the SELECT LINE dialog box.
2. After a line is selected, the LINE MORPHING dialog box as illustrated in Figure 6.5.2 is displayed.
Figure 6.5.2 Line Morphing dialog box
¡¤ CONTRAINT TYPES
There are three types of constraint in line morphing: NO CONSTRAINT, KEEP C ANGLE and KEEP E ANGLE. For a detailed description of the morphing types, refer to Section 6.2.1. Click on the drop down button to select the type of constraint.
¡¤ SELECT MORPH SEGMENT
This option allows the user to define a segment of the selected line to morph by selecting two points on the line. If no segment is defined, the entire selected line is morphed.
¡¤ SELECT CONTROL POINT
The user must select a control point on the line. Click on the left mouse button to select new control point, middle mouse button to use the previous control point, or right mouse button to cancel the selection. Once the control point is selected, the default morph vector is displayed at the control point. Move the mouse to morph the line. The user can view the morphed result in dynamic mode. When the desired result is obtained, click on the left mouse button again to complete the morphing operation or click on the right mouse button to cancel the operation. If the user wants to define another morphing direction, toggle on checkbox of the DEFINE MORPH DIRECTION option.
¡¤ DEFINE MORPH DIRECTION
This option allows user to define a new morphing direction. Once this option is selected, the SELECT POINT FOR VECTOR button is enabled. The user define the direction using function provided in the INPUT COORDINATE dialog box. Click the SELECT POINT FOR VECTOR button to select a point or node on the display area. The new morphing direction is the vector from the control point to the selected point. The user may enter the vector components directly in the VECTOR COMPONENTS dialog box, following by clicking on the APPLY INPUT VALUE button to define the vector.
UNDO allows the user to reject the result from the last morphing operation.
RESET returns the selected line to the original shape after a series of morphing operations.
3. Click on EXIT button to complete the morphing operation. The SELECT LINE dialog box is displayed to enable the user to select another line for morphing.
4.
Click on CANCEL button
in the SELECT LINE dialog box to exit the function.