SURFACE MORPHING

This menu allows the user to morph the selected surface. There are five functions in this menu as shown in Figure 6.4.2.

Figure 6.4.2 Surface Morphing Methods

INTERIOR MORPHING

This function allows the user to morph a surface by selecting a control point within the surface domain. The user may morph the entire surface or a region on the surface.

SELECT SURFACE window will prompt the user to select a surface to morph.

After selecting a surface, the program will display a dialog window as shown in Figure 6.4.3.

Figure 6.4.3 Surface Morphing - Interior

The drop down button, KEEP C ANGLE, allows the user to select the type of constraint for morphing. The description of each constraint type is given in Section 6.2.1. Figure 6.2.14 illustrates the characteristics and results of each constraint type.

If REGION is selected, the SELECT MORPH REGION button will be activated for user to select two diagonal points on the surface to define the morphing region.

Click SELECT CONTROL POINT button to select a point on the surface (or in the region if REGION option is selected) as control point. After an interior point is selected by the cursor on the surface, the program draws the morphing vector and the U-V line at the control point. The user may click the left mouse button and move the cursor to see the morphed U-V line in real time. When the desirable shape of U-V lines is obtained, the user clicks the left mouse button to accept the morphed result. The program will update the surface according to the new U-V lines.

The user may activate DEFINE MORPH DIRECTION option to define a new morph direction. The detailed description about this option is given in Section 6.4.1 LINE MORPHING.

UNDO cancels the last morphing. RESET returns the surface to the original shape prior to the morphing operations.

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EDGE MORPHING


This function uses a point on the surface boundary as the control point. The operation is the same as the INTERIOR MORPHING function.

CORNER MORPHING


This function uses a corner point on the surface as the control point. The operation is the same as INTERIOR MORPHING.

SECTION LINE MORPHING


This function enables the user to morph surface by morphing a U or V section line on the surface.

SELECT SURFACE window will prompt the user to select a surface to morph.

After selecting a surface, the program will display the U-V lines on the surface and a dialog window as shown in Figure 6.4.4.

Select the Constraint Type as in Interior Morphing function.

Click SELECT SECTION LINE to select a U or V section line as the control line.

Figure 6.4.4 Section Line Morphing

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Click SELECT MORPHING POINT to select a control point on the selected section line. After an interior point is selected by the cursor on the control line, the program draws the morphing at the control point. The user may move the cursor to see the morphed U-V line in real time. When the desirable shape of U-V lines is obtained, the user clicks the left mouse button to accept the morphed result. The program will update the surface according to the new control line.


Toggle ON USER DEFINED to enter the morphing vector. ADD SECTION LINE allows the user to add UV section lines at the cursor location. REMOVE SECTION LINE allows the user to remove U or V section lines by the mouse pick. UNDO cancels the last morphing. Reset returns the surface to the original shape prior to the morphing operations.