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HSDS Modifier 695
Inter face
HSDS Parameters rollout
The sub-objects available in the HSDS mo difier
belong to the control grid rather than the mesh
object itself. Transforming the grid sub-objects
also transforms the underly ing mesh, but the mesh
doesn ’t always move to the full extent of the control
grid. This is particularly tr ue in cases where you
transform a sub-object at a level lower than t he
highest level in w h ich the sub-object resides.
For example, if you subdivide a vertex at the Base
Level, it then resides in the Base Level and Level 1.
Ifyouthenmovethevertexinthebaselevel,the
mesh doesn’t, by default, move as far as the vertex.
This is roughly analogous to the way f ree-form
deformation works, but with HSDS, the control
grid conforms much more closely to the shape of
the mesh object.
With vertices, you can control the degree to which
the mesh follows the control-gr id vertex with the
settings on the
Ve r t e x I nt e r p o l a t i o n group.
Vertex—Turns on Vertex sub-object mode,
which lets you select a ver tex beneath the cursor;
region selec tion selects ver tices within the region.
Edge—Turns on Edge sub-object mo de,
which lets you select a face or polygon edge