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package org.bukkit.util;
/**
* EulerAngle is used to represent 3 angles, one for each
* axis (x, y, z). The angles are in radians
*/
public class EulerAngle {
/**
* A EulerAngle with every axis set to 0
*/
public static final EulerAngle ZERO = new EulerAngle(0, 0, 0);
private final double x;
private final double y;
private final double z;
/**
* Creates a EularAngle with each axis set to the
* passed angle in radians
*
* @param x the angle for the x axis in radians
* @param y the angle for the x axis in radians
* @param z the angle for the x axis in radians
*/
public EulerAngle(double x, double y, double z) {
this.x = x;
this.y = y;
this.z = z;
}
/**
* Returns the angle on the x axis in radians
*
* @return the angle in radians
*/
public double getX() {
return x;
}
/**
* Returns the angle on the y axis in radians
*
* @return the angle in radians
*/
public double getY() {
return y;
}
/**
* Returns the angle on the z axis in radians
*
* @return the angle in radians
*/
public double getZ() {
return z;
}
/**
* Return a EulerAngle which is the result of changing
* the x axis to the passed angle
*
* @param x the angle in radians
* @return the resultant EulerAngle
*/
public EulerAngle setX(double x) {
return new EulerAngle(x, y, z);
}
/**
* Return a EulerAngle which is the result of changing
* the y axis to the passed angle
*
* @param y the angle in radians
* @return the resultant EulerAngle
*/
public EulerAngle setY(double y) {
return new EulerAngle(x, y, z);
}
/**
* Return a EulerAngle which is the result of changing
* the z axis to the passed angle
*
* @param z the angle in radians
* @return the resultant EulerAngle
*/
public EulerAngle setZ(double z) {
return new EulerAngle(x, y, z);
}
/**
* Creates a new EulerAngle which is the result of adding
* the x, y, z components to this EulerAngle
*
* @param x the angle to add to the x axis in radians
* @param y the angle to add to the y axis in radians
* @param z the angle to add to the z axis in radians
* @return the resultant EulerAngle
*/
public EulerAngle add(double x, double y, double z) {
return new EulerAngle(
this.x + x,
this.y + y,
this.z + z
);
}
/**
* Creates a new EulerAngle which is the result of subtracting
* the x, y, z components to this EulerAngle
*
* @param x the angle to subtract to the x axis in radians
* @param y the angle to subtract to the y axis in radians
* @param z the angle to subtract to the z axis in radians
* @return the resultant EulerAngle
*/
public EulerAngle subtract(double x, double y, double z) {
return add(-x, -y, -z);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
EulerAngle that = (EulerAngle) o;
return Double.compare(that.x, x) == 0
&& Double.compare(that.y, y) == 0
&& Double.compare(that.z, z) == 0;
}
@Override
public int hashCode() {
int result;
long temp;
temp = Double.doubleToLongBits(x);
result = (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(y);
result = 31 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(z);
result = 31 * result + (int) (temp ^ (temp >>> 32));
return result;
}
}
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