9.5.2

538 • CHAPTER 10
STRUCTURE MENU • 539
Snap 2D
Designed for use in the 2D viewports. In Snap 2D mode, the source point is snapped only if it is at
same depth as the target point and within range of the target. In this case, depth is dependent on your
selected viewport as follows: in the frontal viewport, the Z values of the elements must be equal; in
the side viewport, the X values must be equal; and in the plan viewport, the Y values must be equal.
If you are using a construction plane, the local Y values in this object system must be equal. Also, in
all non-planar viewports, the Y values (related to the virtual projection plane) must be equal.
Snap 2.5D
Designed for use in the 2D viewports. In Snap 2.5D mode, the snapping takes place visually in the
current viewport. Snapping will happen if the source lies visually in the current viewport within the
snap radius of the target. In contrast to 2D snapping, the points do not have to have the same X, Y or
Z values. If you make a 2.5D snapping in the 3D viewport and then switch to another viewport you
will see that, after the snapping, the points do not necessarily agree with their snap targets in the new
viewport. The point has been snapped only parallel to the viewport, not moved in depth.
 Suppose you have activated a World Grid with a grid spacing of 100 units,
you have a selected point at (53/62/91) that you wish to snap to and you are
working in the frontal (XY) view. Also, only the Grid Point snapping option
(see below) is enabled and the snap Radius is 30.
 Snap 2D: If you move the point, it is never snapped to the nearest grid point
since the neighboring grid points lie at (x/y/0) and (x/y/100) and therefore have
different Z coordinates from our source point. Since the Z component never
agrees, it will never be snapped. This would be different if the source point
had a Z coordinate of 100, for example.
 Snap 2.5D: If you move the point, it is snapped to the neighboring grid
points when they come within range. However, since it is moved only
perpendicularly to the camera in this mode, it keeps its Z component. The
snapped point is moved, for example, to the coordinates (0/0/91), (100/0/91),
(100/100/91) or (0/100/91).
 Snap 3D: In this mode, the source point snaps within the complete 3D space.
The point can therefore be moved, for example, to the coordinates (0/0/100),
(100/0/100), (100/100/100) or (0/100/100).
Radius
This is the radius of attraction for the particular target you have selected. The larger this radius, the
more quickly the source will be snapped to the target as the source is moved towards the target.