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Azimuth.java
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50 lines (38 loc) · 1.2 KB
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package org.psjava.ds.geometry;
import org.psjava.goods.GoodLongHash;
import org.psjava.StrictEqualityTester;
public class Azimuth {
private static final double DOUBLE_PI = Math.PI + Math.PI;
public static Azimuth create(double radian) {
return new Azimuth(radian);
}
private final double radian; // 0 =< a < 2pi
public Azimuth(double radian) {
if (Double.isNaN(radian))
throw new IllegalArgumentException("Direction cannot be NaN");
this.radian = adjustRadian(radian);
}
private double adjustRadian(double radian) {
radian = radian % DOUBLE_PI;
if (radian < 0)
radian += DOUBLE_PI;
if (radian >= DOUBLE_PI)
radian = 0;
return radian;
}
public double radian() {
return radian;
}
@Override
public final boolean equals(Object v) {
return StrictEqualityTester.areEqual(this, v, (o1, o2) -> o1.radian == o2.radian);
}
@Override
public final int hashCode() {
return GoodLongHash.hash(Double.doubleToLongBits(radian));
}
@Override
public String toString() {
return "Azimuth(" + String.format("%.2f", radian) + "pi)";
}
}