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Chapter 7: Transforming Objects, Pivoting, Aligning, and Snapping



                           When snapping is enabled, a small circle appears at the center of the pivot point. This circle is a visual
                           reminder that snapping is enabled. When you move an object while snapping is enabled, you can either
                           drag the small circle to move the object freely between snapping points or drag the Move tool’s controls to
                           constraint the object’s movement.
                           As you drag an object, the starting position it marked and a line is drawn between this starting point and
                           the destination point. Available snapping points are marked with a set of crosshairs. If you release the
                           object, it snaps to the highlighted set of crosshairs. The line connecting the starting and end points and the
                           snapping point crosshairs are colored green when the object is over an available snapping point and yellow
                           when not.
                           In addition to the small circle icon and the Move tool controls, you can move the mouse over the object and
                           any available snapping points on the object are highlighted. For example, if the Vertex option in the Grid
                           and Snap Settings dialog box is enabled, moving the mouse over one of a box object’s corners highlights the
                           corner with a set of yellow crosshairs. Dragging while a vertex’s crosshair is highlighted lets you snap the
                           selected corner to another position.

                   New Feature
                   The visual markers and the ability to select and snap a specific object location are new to 3ds Max 2011. n
                           Tutorial: Creating a 2D outline of an object

                           The 2.5D snap can be confusing. It limits snapping to the active construction grid, but within the active
                           grid, it can snap to 3D points that are projected onto the active grid. You can create a 2D representation of a
                           3D object by snapping to the vertices of the suspended object.
                           To create a 2D outline of a cylinder object, follow these steps:
                               1. Select the Create ➪ Standard Primitives ➪ Cylinder menu to create a simple cylinder object.
                               2. Select and rotate the cylinder so it is suspended and rotated at an angle above the construction grid.
                               3. Click and hold the Snap toggle button, and select the 2.5D Snap flyout option. Then right-click
                                  the Snap toggle and select only the Vertex option in the Snaps panel. Then close the Grid and
                                  Snap Settings dialog box.
                               4. Choose the Create ➪ Shapes ➪ Line menu and create a line in the Top viewport by snapping to
                                  the points that make the outline of the cylinder.
                           Figure 7.19 shows the finished methane molecule.

                   Tip
                   Right-clicking the Snap toggle opens the Grid and Snap Settings dialog box, except for the Spinner Snap toggle,
                   which opens the Preference Settings dialog box. n
                           These Snap buttons control the snapping for translations. To the right are two other buttons: Angle Snap
                           toggle and Percent Snap. These buttons control the snapping of rotations and scalings.

                   Note
                   The keyboard shortcut for turning the Snap feature on and off is the S key. n






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