8
1018 Glossary
Control Vertex (CV )
Control vertices in the lattice surrounding a NURBS surface
In NURBS modeling, a vertex that controls a CV
Curve or CV Surface. The 3D location of each
CVaffectstheshapeofthecurveorsurface.CVs
aren’t constrained to lie on the curve or surface.
Each CV has a rational weight that can be used to
adjust the influence of the CV on the curve’s or
surface’s shape.
Controller
Software that controls animation. Controllers
handle the following functions:
•Storinganimationkeyvalues
• Storing procedura l animation sett ings
• Interpolating between animation key values
Convex H ul l Pr opert y
The property of NURBS curves and surfaces
whereby the control lattice described by CVs forms
a convex hull surrounding the curve or surface.
Cool
It’s useful to be able to edit a material in the
Material Editor and have it immediately updated
in the scene. Sometimes you want to work on a
material without affecting the scene. You want to
adjust a material until you’re sure that it’s what you
want, and then reassign it. In other words, you
want to
cool
a
hot material (page 3–1047)
.
You cool a material by copying it in the Material
Editor sample slots. You can copy a material in
two ways:
•UsetheCopyMaterialbutton.
•Draganddroptocopythematerial.
When you drag to copy a sample, you end up
w ith two materials with the same name, but one is
cool while the other is hot. In the Material Editor,
you can have up to 24 materials with the same
name, but every m aterial in your scene must have
auniquename.
You can now adjust the cool material, and compare
it with the hot materi al. If you like the changes
you’ve made, you can update the scene.
Coor dina te S pace
In character studio biped animation, the three
most-used coordinate spaces are world, object,
and body space. These are often used to control
the biped’s hands and feet.
Anothercoordinatesystemisusedforthefootstep
gizmos themselves: a foot on a footstep is in that
footstep’s coordinate space. If the footstep is
move d, the foot moves also. (A sliding footstep
is a footstep that moves relative to the coordinate
system of the corresponding footstep gizmo.)