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CV Surface Sub-Object 1181
CV Sur face rollout (creation time)
Lengt h—The length of the sur face in current
3ds Max units.
Width—Thewidthofthesurfaceincurrent
3ds Max units.
Length Points—The number of points along the
length of the surface. In other words, the initial
number of point columns in the surface. Range=2
to 50. Default=4.
Width Points—The number of points along the
width of the surface. In other words, the initial
number of point rows in the su rface. Range=2 to
50. Default=4.
Generate Ma pping Coordinates—Generates
mapping coordinates so you can apply mapped
materials to the surface.
Flip Normals—Turn on to reverse the direction of
the surface norma ls.
Automatic Reparameterization group
Theradiobuttonsinthisgroupboxletyou
choose automatic reparameterization. With
reparameterization, the surface maintains
its parameterization as you edit it. Without
reparameterization, the surface’s parameterization
doesn’t change as you edit it, and can become
irregular.
None—Do not reparameterize.
Chord Len g th—Chooses the chord-length
algorithm for reparameterization.
Chord-length reparameterization spaces knots
(in
parameter space (page 3–1082) )basedonthe
square root of the length of each curve segment.
Chord-length reparameterization is usually the
best choice.
Unifor m—Spaces the knots uniformly.
A uniform knot vec tor has the advantage that the
surface will change only locally when you edit it.
With the other two forms of parameterization,
moving any CV can change the entire surface.
CV Surface rollout (m odification time)
U Degr ee and V D egree—Letyousetthedegreeof
the surface in either the U or V dimension. The
higher the degree value, the greater the continuity.
Thelowerthedegree,themorediscontinuousthe
surface segments become. The degree can’t b e less
than one or greater than the number allowed by the
number of CVs in the specified dimension. D egree
3 is adequate to represent continuous surfaces, and
is stable and well behav ed. Default=3.