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308 lines
4.7 KiB
308 lines
4.7 KiB
package mightypork.utils.math.coord;
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/**
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* Implementation of coordinate methods
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*
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* @author MightyPork
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* @param <V> Return type of methods
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*/
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abstract class VecMath<V extends Vec> extends AbstractVec {
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/**
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* <p>
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* Some operation was performed and this result was obtained.
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* </p>
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* <p>
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* It's now up to implementing class what to do - mutable ones can alter
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* it's data values, immutable can return a new Vec.
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* </p>
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*
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* @param x
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* @param y
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* @param z
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* @return the result Vec
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*/
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public abstract V result(double x, double y, double z);
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/**
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* Set X coordinate (if immutable, in a copy).
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*
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* @param x x coordinate
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* @return result
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*/
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public V setX(double x)
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{
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return result(x, y(), z());
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}
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/**
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* Set Y coordinate (if immutable, in a copy).
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*
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* @param y y coordinate
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* @return result
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*/
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public V setY(double y)
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{
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return result(x(), y, z());
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}
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/**
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* Set Z coordinate (if immutable, in a copy).
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*
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* @param z z coordinate
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* @return result
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*/
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public V setZ(double z)
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{
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return result(x(), y(), z);
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}
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/**
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* Get absolute value (positive)
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*
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* @return result
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*/
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public V abs()
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{
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return result(Math.abs(x()), Math.abs(y()), Math.abs(z()));
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}
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/**
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* Add a vector.
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*
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* @param vec offset
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* @return result
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*/
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public V add(Vec vec)
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{
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return add(vec.x(), vec.y(), vec.z());
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}
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/**
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* Add to each component.<br>
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* Z is unchanged.
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*
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* @param x x offset
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* @param y y offset
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* @return result
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*/
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public V add(double x, double y)
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{
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return add(x, y, 0);
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}
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/**
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* Add to each component.
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*
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* @param x x offset
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* @param y y offset
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* @param z z offset
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* @return result
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*/
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public V add(double x, double y, double z)
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{
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return result(x() + x, y() + y, z() + z);
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}
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/**
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* Get copy divided by two
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*
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* @return result
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*/
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public V half()
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{
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return mul(0.5);
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}
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/**
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* Multiply each component.
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*
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* @param d multiplier
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* @return result
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*/
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public V mul(double d)
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{
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return mul(d, d, d);
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}
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/**
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* Multiply each component.
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*
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* @param vec vector of multipliers
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* @return result
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*/
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public V mul(Vec vec)
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{
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return mul(vec.x(), vec.y(), vec.z());
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}
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/**
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* Multiply each component.<br>
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* Z is unchanged.
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*
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* @param x x multiplier
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* @param y y multiplier
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* @return result
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*/
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public V mul(double x, double y)
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{
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return mul(x, y, 1);
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}
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/**
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* Multiply each component.
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*
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* @param x x multiplier
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* @param y y multiplier
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* @param z z multiplier
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* @return result
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*/
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public V mul(double x, double y, double z)
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{
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return result(x() * x, y() * y, z() * z);
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}
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/**
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* Round coordinates.
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*
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* @return result
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*/
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public V round()
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{
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return result(Math.round(x()), Math.round(y()), Math.round(z()));
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}
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/**
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* Round coordinates down.
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*
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* @return result
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*/
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public V floor()
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{
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return result(Math.floor(x()), Math.floor(y()), Math.floor(z()));
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}
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/**
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* Round coordinates up.
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*
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* @return result
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*/
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public V ceil()
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{
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return result(Math.ceil(x()), Math.ceil(y()), Math.ceil(z()));
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}
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/**
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* Subtract vector.
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*
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* @param vec offset
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* @return result
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*/
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public V sub(Vec vec)
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{
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return sub(vec.x(), vec.y(), vec.z());
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}
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/**
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* Subtract a 2D vector.<br>
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* Z is unchanged.
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*
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* @param x x offset
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* @param y y offset
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* @return result
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*/
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public V sub(double x, double y)
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{
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return sub(x, y, 0);
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}
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/**
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* Subtract a 3D vector.
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*
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* @param x x offset
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* @param y y offset
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* @param z z offset
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* @return result
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*/
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public V sub(double x, double y, double z)
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{
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return result(x() - x, y() - y, z() - z);
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}
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/**
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* Negate all coordinates (* -1)
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*
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* @return result
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*/
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public V neg()
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{
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return result(-x(), -y(), -z());
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}
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/**
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* Scale vector to given size.
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*
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* @param size size we need
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* @return result
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*/
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public V norm(double size)
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{
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if (isZero()) return result(x(), y(), z()); // can't norm zero vector
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final double k = size / size();
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return mul(k);
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}
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@Override
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public int hashCode()
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{
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final int prime = 31;
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int result = 1;
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result = prime * result + Double.valueOf(x()).hashCode();
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result = prime * result + Double.valueOf(y()).hashCode();
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result = prime * result + Double.valueOf(z()).hashCode();
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return result;
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}
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@Override
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public boolean equals(Object obj)
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{
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if (this == obj) return true;
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if (obj == null) return false;
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if (!(obj instanceof Vec)) return false;
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final Vec other = (Vec) obj;
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return x() == other.x() && y() == other.y() && z() == other.z();
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}
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@Override
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public String toString()
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{
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return String.format("(%.1f %.1f %.1f)", x(), y(), z());
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}
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}
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