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Convert Curve Dialog 1227
NUR B S Editi ng Dia logs
Conve rt Curve Dialog
Modify panel > Select NURBS curve sub-object. > Curve
Common rollout > Convert Curve button
This dialog is a general way to convert one kind of a
curve to another or to adjust a curve’s parameters.
Inter face
Point Cur ve and CV Curve—Choose whether to
converttoapointcurveoraCVcurve. Ifthe
curveisalreadyofthetypeyouchose,thesettings
in this dialog don’t convert it, but do change its
properties. Default=CV Curve.
CV Curve options
ThesearetheoptionswhenyouchooseCVCurve.
Number—When chosen, the spinner sets the
number of CVs in the CV curve.
Tolerance—When chosen, the software calculates
the number of CVs. This option rebuilds the curve
according to accuracy. The lower the Tolerance
value,themoreaccuratetherebuild.Increasing
Toleranceenablesthecurvetoberebuiltusing
fewer CVs.
Reparameterization group
These controls let you reparameterize the CV
cur ve and turn on automatic reparameterization.
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
curve changes only locally when you edit it. With
chord-length parameterization, moving any CV
can potent ia l ly change the entire sub-object.
Maintain Par ameteriza tion—When on, the curve is
automatically reparameterized as you edit it, using
the currently active method of reparameterization.
When off, no reparameterization happens
unless you use a dialog to specifically request it.
Default=on.
Point Curve options:
ThesearetheoptionswhenyouchoosePoint
Curve.
Number —Sets the number of p oints in the point
curve.
Tolerance—When chosen, the software calculates
the number of points. This option rebuilds the
curve according to accuracy. The lower the
Tolerancevalue,themoreaccuratetherebuild.
Increasing Tolerance enables the curve to be
rebuilt using fewer points.
Prev iew—When on, the effect of the conversion is
previewed in viewports. Default=on.