Sha256: f8ce0c8559b91bbcddcc1aa3633a5c138611b80df4672efbf69cf4f67920728d
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Versions: 11
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Stored size: 1.89 KB
Contents
package toxi.math;
import java.util.NavigableSet;
import java.util.SortedSet;
import java.util.TreeSet;
/**
*
* @author tux
*/
public class NonLinearScaleMap {
/**
*
*/
public class Sample implements Comparable<Sample> {
public final double x,
/**
*
*/
y;
/**
*
* @param x
* @param y
*/
public Sample(double x, double y) {
this.x = x;
this.y = y;
}
/**
*
* @param b
* @return
*/
@Override
public int compareTo(Sample b) {
return (int) Math.signum(x - b.x);
}
}
private final TreeSet<Sample> samples;
private double rangeMin = Float.MAX_VALUE;
private double rangeMax = Float.MIN_VALUE;
/**
*
*/
public NonLinearScaleMap() {
samples = new TreeSet<>();
}
/**
*
* @param x
* @param y
* @return
*/
public NonLinearScaleMap addSample(double x, double y) {
samples.add(new Sample(x, y));
rangeMin = MathUtils.min(y, rangeMin);
rangeMax = MathUtils.max(y, rangeMax);
return this;
}
/**
*
* @return
*/
public NavigableSet<Sample> getSamples() {
return samples;
}
/**
*
* @param x
* @return
*/
public double map(double x) {
Sample t = new Sample(x, 0);
SortedSet<Sample> aset = samples.headSet(t);
SortedSet<Sample> bset = samples.tailSet(t);
if (aset.isEmpty()) {
return bset.first().y;
} else {
if (bset.isEmpty()) {
return aset.last().y;
} else {
Sample a = aset.last();
Sample b = bset.first();
return MathUtils.lerp(a.y, b.y, (x - a.x) / (b.x - a.x));
}
}
}
}
Version data entries
11 entries across 11 versions & 1 rubygems