Java Reference
In-Depth Information
Listing 5-9. StepInterpolator.fx
public class StepInterpolator extends Interpolator{
public var interpolator = Interpolator.LINEAR;
public var steps = 7;
public override function interpolate(start:Object,end:Object,fraction:Number):Object{
var s = (start as Number);
var e = (end as Number);
var range = e-s;
var value:Number = interpolator.interpolate(start, end, fraction) as Number;
var stepSize = range/steps;
var total = e;
for (r in [1..steps-1]){
if (value < stepSize*(r)){
total = (r-1)*(range/(steps - 1.0));
return total;
When creating a StepInterpolator as shown in Listing 5-9, the number of steps can be specified, as
well as another Interpolator to be broken into discrete steps. The function interpolate passes the
variables start , end, and fraction into the reference interpolator . The returned value is then checked
to see which step it most closely matches. Figure 5-8 shows the step function being applied to the default
linear interpolator, and Figure 5-9 shows a step interpolator applied to the polynomial interpolator used
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