oCOSMO Cosmo 3DTM Manual

A SERVICE OF

next previous

112

Chapter 10: Scene Graph Engines

csInterpolator Fields

The ﬁelds in csInterpolator include:

void setFraction(float fraction);

float getFraction();

csMFFloat* key();

For an explanation of key() and setFraction(), see, “Interpolator Engine Terminology” on

page 111.

csSpline

A csSpline takes an array of keys as its input and outputs a set of weights. A key is one

or more pieces of data; a weight is a fractional scaling factor. How the output is weighted

depends on the order of the spline. Figure 10-3 shows two different splines that use the

same key values, but are of different orders: piecewise linear and cubic.

Figure 10-3 Spline

Note: Release 1.0 and 1.1 of Cosmo 3D only support the piecewise linear order.

Typically, the output of a csSpline is used as the input of a csMorphEng.

x

y

Attribute

Time

Piecewise linear

Cubic