9

FFD(Box) Space Warp 93
Moving control points in the lattice deforms the object.
Procedure
TousetheFFD(box)spacewarp:
1.
On the Create p anel, click Space
Warps. Choose Geometric/Deformable f rom
the list, then on the O bjec t Type rollout, click
FFD(Box).
2. Drag in a view p ort to c reate the base. Release
the mouse button, and then move the mouse
to define the height of the FFD lattice. Click to
finish the lattice.
3. Bind the lattice to the object you want
to deform.
4. Determine the relative placement of the lattice
to the object.
If the lattice is to be outside of the object, turn
on All Vertices. To affect only those vertices
inside the lattice, choose Only In Volume, and
position the lattice accordingly.
5. In the modifier stack display, choose
Control Points as the sub-object level for
FFD(box ).
6. Adjust the control points.
Note: The distortion effect of an FFD modifier
is based on the positional offset of the control
points from their original positions in the
source volume. If you don’t move control
points, there is no effect on the target o bjec t.
Keep this in mind when using space-warp
version of the FFD.
If you’re using the Deform group > All Vertices
option, once you’v e distorted the object you
cansettheFalloffvaluetoadjusthowmuchthe
lattice affects the object, based on distance. This
is particularly useful if the lattice is animated to
approach or move away from the target object.
When Falloff is set to 0, all the vertices are affected,
regard less of distance.
Note: When you’re at the base-parameters level of
an FFD modifier in the Stack, the Show End Result
button is turned off and spring-loaded, as it is in
an Edit Mesh modifier.