Package org.pushingpixels.trident.ease
Class Spline
- java.lang.Object
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- org.pushingpixels.trident.ease.Spline
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- All Implemented Interfaces:
TimelineEase
public class Spline extends Object implements TimelineEase
Spline easer. Is based on the code from TimingFramework by Chet Haase and Romain Guy.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description float
map(float lengthFraction)
Given a fraction of time along the spline (which we can interpret as the length along a spline), return the interpolated value of the spline.
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Constructor Detail
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Spline
public Spline(float easeAmount)
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Spline
public Spline(float x1, float y1, float x2, float y2)
Creates a new instance of SplineInterpolator with the control points defined by (x1, y1) and (x2, y2). The anchor points are implicitly defined as (0, 0) and (1, 1).- Throws:
IllegalArgumentException
- This exception is thrown when values beyond the allowed [0,1] range are passed in
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Method Detail
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map
public float map(float lengthFraction)
Given a fraction of time along the spline (which we can interpret as the length along a spline), return the interpolated value of the spline. We first calculate the t value for the length (by doing a lookup in our array of previousloy calculated values and then linearly interpolating between the nearest values) and then calculate the Y value for this t.- Specified by:
map
in interfaceTimelineEase
- Parameters:
lengthFraction
- Fraction of time in a given time interval.- Returns:
- interpolated fraction between 0 and 1
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