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1158 Chapter 9: Surface Modeling
curveinplace;thenonceitiscreated,transform
it using constraints.
Tip: You can a lso use axis constraints by us ing
Shi f t +clone at the Curve sub-object level.
Inter face
Creation time
At creation t ime, transform curves have no
parameters.
Transform Curve rollo ut (modification time)
At modification time, you can transform the
transform curve as a cur ve sub-object, and you can
animate curve sub-object tr ansforms. Transform
curves also have one control in the Modify panel.
Replace Base Curve—Lets you replace the parent
curve. Click the button, then click the curve to
replace the original curve.
Blend Curve
Selec t NURBS o b je ct. > M odify panel > Create Curves
rollout > Dependent Cur ves group box > Blend button
Select NURBS object. > Modify panel > NURBS toolbox >
Create Blend Cur ve button
A blend curve connects the end of one curve to
the end of another, blending the curvature of
the parents to create a smooth curve between
them. You can blend curves of the same type, a
point curve with a CV curve (and vice versa), an
independent curve with a dependent curve, and
so on.
Blendcurvesconnectingoriginalcurves
Procedure
To cre ate a blend cu rve:
1.
In a NURBS object that contains two
curves,turnonBlend.
2. Click one curve near the end that you want
to connect. The end that will be connected
is highlighted. Without releasing the mouse
button, drag to the end of the other curve
that you want to connect. The other end is
highlighted as well. When the end that you
want to connect is highlig hted, release the
mouse button.
After the blend curve is created, changing the
position or the curvature of either parent curve
changes the blend curve as well.
3. Adjust the blend parameters.
Interfa ce
Blend Curve ro llout (creation time )
"Tension" affects the t angent between a p arent
curveandtheblendcurve.Thegreaterthetension