Copyright Goodheart-Willcox Co., Inc. Chapter 11 Subobject Editing 295 of the rotate gizmo if needed. See Figure 11-30B. Then, select the axis of revolution. Finally, pick the angle start point and enter the rotation. See Figure 11-30C. If the [Ctrl] key is not pressed while dynamically rotating the vertices, the area of the selected vertices does not change and adjacent faces are triangulated. This is because the edges of the adjacent faces are attached to the selected vertices, so their edge length changes as the selected edge is rotated. If the [Ctrl] key is pressed once, the adjacent faces are not triangulated unless necessary, but the faces may change shape. NOTE NOTE If the selected edge does not dynamically rotate at the “angle end point” prompt, then the desired rotation is not possible. Scaling Vertices As mentioned earlier, it is not possible to scale a single vertex. However, two or more vertices can be selected for scaling. This, in effect, scales edges. The selection methods are the same as discussed for rotating vertices and the use of the [Ctrl] key while dragging produces the same effects. As the pointer is dragged, the dynamic display of scaled edges may be diffi cult to visualize. Therefore, it is best to use a scale factor or the Reference option to achieve properly scaled edges. Angle start point Four vertices selected A B C Figure 11-30. To rotate or scale vertices, multiple vertices must be selected. In effect, the edges are modified. A—Vertices are selected to be rotated. B—The rotate gizmo is placed at the base of rotation and the rotation axis is selected. C—The vertices are rotated.