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

Several snap points specific to NURBS objects, such as NURBS points and curves, are also shown in
Figure 7.18. These points include:
l CV: Snaps to any NURBS Control Vertex subobject
l Point: Snaps to a NURBS point
l Curve Center: Snaps to the center of the NURBS curve
l Curve Normal: Snaps to a point that is normal to a NURBS curve
l Curve Tangent: Snaps to a point that is tangent to a NURBS curve
l Curve Edge: Snaps to the edge of a NURBS curve
l Curve End: Snaps to the end of a NURBS curve
l Surf Center: Snaps to the center of a NURBS surface
l Surf Normal: Snaps to a point that is normal to a NURBS surface
l Surf Edge: Snaps to the edge of a NURBS surface

Setting snap options
The Grid and Snap Settings dialog box holds a panel of Options, shown in Figure 7.20, in which you can
set the marker size and whether they display. The Snap Preview Radius defines the radial distance from the
snap point required before the object that is being moved is displayed at the target snap point as a preview.
This value can be larger than the actual Snap Radius and is meant to provide visual feedback on the snap
operation. The Snap Radius setting determines how close the cursor must be to a snap point before it snaps
to it.
The Angle and Percent values are the strengths for any Rotate and Scale transformations, respectively. The
Snap to Frozen Objects lets you control whether frozen items can be snapped to. You also can cause trans-
lations to be affected by the designated axis constraints with the Use Axis Constraints option. The Display
Rubber Band option draws a line from the object’s starting location to its snapping location.

FIGURE 7.20
The Options panel includes settings for marker size and color and the Snap Strength value.

Within any viewpoint, holding down the Shift key and right-clicking in the viewport can access a pop-up
menu of grid points and options. This pop-up quadmenu lets you quickly add or reset all the current snap
points and change snap options, such as Transformed Constraints and Snap to Frozen.

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