| /* | |
| * Copyright (c) 2009-2010 jMonkeyEngine | |
| * All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are | |
| * met: | |
| * | |
| * * Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * | |
| * * Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * | |
| * * Neither the name of 'jMonkeyEngine' nor the names of its contributors | |
| * may be used to endorse or promote products derived from this software | |
| * without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| package com.jme3.math; | |
| import com.jme3.export.*; | |
| import java.io.IOException; | |
| import java.util.logging.Logger; | |
| /* | |
| * -- Added *Local methods to cut down on object creation - JS | |
| */ | |
| /** | |
| * <code>Vector3f</code> defines a Vector for a three float value tuple. | |
| * <code>Vector3f</code> can represent any three dimensional value, such as a | |
| * vertex, a normal, etc. Utility methods are also included to aid in | |
| * mathematical calculations. | |
| * | |
| * @author Mark Powell | |
| * @author Joshua Slack | |
| */ | |
| public final class Vector3f implements Savable, Cloneable, java.io.Serializable { | |
| static final long serialVersionUID = 1; | |
| private static final Logger logger = Logger.getLogger(Vector3f.class.getName()); | |
| public final static Vector3f ZERO = new Vector3f(0, 0, 0); | |
| public final static Vector3f NAN = new Vector3f(Float.NaN, Float.NaN, Float.NaN); | |
| public final static Vector3f UNIT_X = new Vector3f(1, 0, 0); | |
| public final static Vector3f UNIT_Y = new Vector3f(0, 1, 0); | |
| public final static Vector3f UNIT_Z = new Vector3f(0, 0, 1); | |
| public final static Vector3f UNIT_XYZ = new Vector3f(1, 1, 1); | |
| public final static Vector3f POSITIVE_INFINITY = new Vector3f( | |
| Float.POSITIVE_INFINITY, | |
| Float.POSITIVE_INFINITY, | |
| Float.POSITIVE_INFINITY); | |
| public final static Vector3f NEGATIVE_INFINITY = new Vector3f( | |
| Float.NEGATIVE_INFINITY, | |
| Float.NEGATIVE_INFINITY, | |
| Float.NEGATIVE_INFINITY); | |
| /** | |
| * the x value of the vector. | |
| */ | |
| public float x; | |
| /** | |
| * the y value of the vector. | |
| */ | |
| public float y; | |
| /** | |
| * the z value of the vector. | |
| */ | |
| public float z; | |
| /** | |
| * Constructor instantiates a new <code>Vector3f</code> with default | |
| * values of (0,0,0). | |
| * | |
| */ | |
| public Vector3f() { | |
| x = y = z = 0; | |
| } | |
| /** | |
| * Constructor instantiates a new <code>Vector3f</code> with provides | |
| * values. | |
| * | |
| * @param x | |
| * the x value of the vector. | |
| * @param y | |
| * the y value of the vector. | |
| * @param z | |
| * the z value of the vector. | |
| */ | |
| public Vector3f(float x, float y, float z) { | |
| this.x = x; | |
| this.y = y; | |
| this.z = z; | |
| } | |
| /** | |
| * Constructor instantiates a new <code>Vector3f</code> that is a copy | |
| * of the provided vector | |
| * @param copy The Vector3f to copy | |
| */ | |
| public Vector3f(Vector3f copy) { | |
| this.set(copy); | |
| } | |
| /** | |
| * <code>set</code> sets the x,y,z values of the vector based on passed | |
| * parameters. | |
| * | |
| * @param x | |
| * the x value of the vector. | |
| * @param y | |
| * the y value of the vector. | |
| * @param z | |
| * the z value of the vector. | |
| * @return this vector | |
| */ | |
| public Vector3f set(float x, float y, float z) { | |
| this.x = x; | |
| this.y = y; | |
| this.z = z; | |
| return this; | |
| } | |
| /** | |
| * <code>set</code> sets the x,y,z values of the vector by copying the | |
| * supplied vector. | |
| * | |
| * @param vect | |
| * the vector to copy. | |
| * @return this vector | |
| */ | |
| public Vector3f set(Vector3f vect) { | |
| this.x = vect.x; | |
| this.y = vect.y; | |
| this.z = vect.z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>add</code> adds a provided vector to this vector creating a | |
| * resultant vector which is returned. If the provided vector is null, null | |
| * is returned. | |
| * | |
| * @param vec | |
| * the vector to add to this. | |
| * @return the resultant vector. | |
| */ | |
| public Vector3f add(Vector3f vec) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, null returned."); | |
| return null; | |
| } | |
| return new Vector3f(x + vec.x, y + vec.y, z + vec.z); | |
| } | |
| /** | |
| * | |
| * <code>add</code> adds the values of a provided vector storing the | |
| * values in the supplied vector. | |
| * | |
| * @param vec | |
| * the vector to add to this | |
| * @param result | |
| * the vector to store the result in | |
| * @return result returns the supplied result vector. | |
| */ | |
| public Vector3f add(Vector3f vec, Vector3f result) { | |
| result.x = x + vec.x; | |
| result.y = y + vec.y; | |
| result.z = z + vec.z; | |
| return result; | |
| } | |
| /** | |
| * <code>addLocal</code> adds a provided vector to this vector internally, | |
| * and returns a handle to this vector for easy chaining of calls. If the | |
| * provided vector is null, null is returned. | |
| * | |
| * @param vec | |
| * the vector to add to this vector. | |
| * @return this | |
| */ | |
| public Vector3f addLocal(Vector3f vec) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, null returned."); | |
| return null; | |
| } | |
| x += vec.x; | |
| y += vec.y; | |
| z += vec.z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>add</code> adds the provided values to this vector, creating a | |
| * new vector that is then returned. | |
| * | |
| * @param addX | |
| * the x value to add. | |
| * @param addY | |
| * the y value to add. | |
| * @param addZ | |
| * the z value to add. | |
| * @return the result vector. | |
| */ | |
| public Vector3f add(float addX, float addY, float addZ) { | |
| return new Vector3f(x + addX, y + addY, z + addZ); | |
| } | |
| /** | |
| * <code>addLocal</code> adds the provided values to this vector | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. | |
| * | |
| * @param addX | |
| * value to add to x | |
| * @param addY | |
| * value to add to y | |
| * @param addZ | |
| * value to add to z | |
| * @return this | |
| */ | |
| public Vector3f addLocal(float addX, float addY, float addZ) { | |
| x += addX; | |
| y += addY; | |
| z += addZ; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>scaleAdd</code> multiplies this vector by a scalar then adds the | |
| * given Vector3f. | |
| * | |
| * @param scalar | |
| * the value to multiply this vector by. | |
| * @param add | |
| * the value to add | |
| */ | |
| public Vector3f scaleAdd(float scalar, Vector3f add) { | |
| x = x * scalar + add.x; | |
| y = y * scalar + add.y; | |
| z = z * scalar + add.z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>scaleAdd</code> multiplies the given vector by a scalar then adds | |
| * the given vector. | |
| * | |
| * @param scalar | |
| * the value to multiply this vector by. | |
| * @param mult | |
| * the value to multiply the scalar by | |
| * @param add | |
| * the value to add | |
| */ | |
| public Vector3f scaleAdd(float scalar, Vector3f mult, Vector3f add) { | |
| this.x = mult.x * scalar + add.x; | |
| this.y = mult.y * scalar + add.y; | |
| this.z = mult.z * scalar + add.z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>dot</code> calculates the dot product of this vector with a | |
| * provided vector. If the provided vector is null, 0 is returned. | |
| * | |
| * @param vec | |
| * the vector to dot with this vector. | |
| * @return the resultant dot product of this vector and a given vector. | |
| */ | |
| public float dot(Vector3f vec) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, 0 returned."); | |
| return 0; | |
| } | |
| return x * vec.x + y * vec.y + z * vec.z; | |
| } | |
| /** | |
| * <code>cross</code> calculates the cross product of this vector with a | |
| * parameter vector v. | |
| * | |
| * @param v | |
| * the vector to take the cross product of with this. | |
| * @return the cross product vector. | |
| */ | |
| public Vector3f cross(Vector3f v) { | |
| return cross(v, null); | |
| } | |
| /** | |
| * <code>cross</code> calculates the cross product of this vector with a | |
| * parameter vector v. The result is stored in <code>result</code> | |
| * | |
| * @param v | |
| * the vector to take the cross product of with this. | |
| * @param result | |
| * the vector to store the cross product result. | |
| * @return result, after recieving the cross product vector. | |
| */ | |
| public Vector3f cross(Vector3f v,Vector3f result) { | |
| return cross(v.x, v.y, v.z, result); | |
| } | |
| /** | |
| * <code>cross</code> calculates the cross product of this vector with a | |
| * parameter vector v. The result is stored in <code>result</code> | |
| * | |
| * @param otherX | |
| * x component of the vector to take the cross product of with this. | |
| * @param otherY | |
| * y component of the vector to take the cross product of with this. | |
| * @param otherZ | |
| * z component of the vector to take the cross product of with this. | |
| * @param result | |
| * the vector to store the cross product result. | |
| * @return result, after recieving the cross product vector. | |
| */ | |
| public Vector3f cross(float otherX, float otherY, float otherZ, Vector3f result) { | |
| if (result == null) result = new Vector3f(); | |
| float resX = ((y * otherZ) - (z * otherY)); | |
| float resY = ((z * otherX) - (x * otherZ)); | |
| float resZ = ((x * otherY) - (y * otherX)); | |
| result.set(resX, resY, resZ); | |
| return result; | |
| } | |
| /** | |
| * <code>crossLocal</code> calculates the cross product of this vector | |
| * with a parameter vector v. | |
| * | |
| * @param v | |
| * the vector to take the cross product of with this. | |
| * @return this. | |
| */ | |
| public Vector3f crossLocal(Vector3f v) { | |
| return crossLocal(v.x, v.y, v.z); | |
| } | |
| /** | |
| * <code>crossLocal</code> calculates the cross product of this vector | |
| * with a parameter vector v. | |
| * | |
| * @param otherX | |
| * x component of the vector to take the cross product of with this. | |
| * @param otherY | |
| * y component of the vector to take the cross product of with this. | |
| * @param otherZ | |
| * z component of the vector to take the cross product of with this. | |
| * @return this. | |
| */ | |
| public Vector3f crossLocal(float otherX, float otherY, float otherZ) { | |
| float tempx = ( y * otherZ ) - ( z * otherY ); | |
| float tempy = ( z * otherX ) - ( x * otherZ ); | |
| z = (x * otherY) - (y * otherX); | |
| x = tempx; | |
| y = tempy; | |
| return this; | |
| } | |
| public Vector3f project(Vector3f other){ | |
| float n = this.dot(other); // A . B | |
| float d = other.lengthSquared(); // |B|^2 | |
| return new Vector3f(other).normalizeLocal().multLocal(n/d); | |
| } | |
| /** | |
| * Returns true if this vector is a unit vector (length() ~= 1), | |
| * returns false otherwise. | |
| * | |
| * @return true if this vector is a unit vector (length() ~= 1), | |
| * or false otherwise. | |
| */ | |
| public boolean isUnitVector(){ | |
| float len = length(); | |
| return 0.99f < len && len < 1.01f; | |
| } | |
| /** | |
| * <code>length</code> calculates the magnitude of this vector. | |
| * | |
| * @return the length or magnitude of the vector. | |
| */ | |
| public float length() { | |
| return FastMath.sqrt(lengthSquared()); | |
| } | |
| /** | |
| * <code>lengthSquared</code> calculates the squared value of the | |
| * magnitude of the vector. | |
| * | |
| * @return the magnitude squared of the vector. | |
| */ | |
| public float lengthSquared() { | |
| return x * x + y * y + z * z; | |
| } | |
| /** | |
| * <code>distanceSquared</code> calculates the distance squared between | |
| * this vector and vector v. | |
| * | |
| * @param v the second vector to determine the distance squared. | |
| * @return the distance squared between the two vectors. | |
| */ | |
| public float distanceSquared(Vector3f v) { | |
| double dx = x - v.x; | |
| double dy = y - v.y; | |
| double dz = z - v.z; | |
| return (float) (dx * dx + dy * dy + dz * dz); | |
| } | |
| /** | |
| * <code>distance</code> calculates the distance between this vector and | |
| * vector v. | |
| * | |
| * @param v the second vector to determine the distance. | |
| * @return the distance between the two vectors. | |
| */ | |
| public float distance(Vector3f v) { | |
| return FastMath.sqrt(distanceSquared(v)); | |
| } | |
| /** | |
| * | |
| * <code>mult</code> multiplies this vector by a scalar. The resultant | |
| * vector is returned. | |
| * | |
| * @param scalar | |
| * the value to multiply this vector by. | |
| * @return the new vector. | |
| */ | |
| public Vector3f mult(float scalar) { | |
| return new Vector3f(x * scalar, y * scalar, z * scalar); | |
| } | |
| /** | |
| * | |
| * <code>mult</code> multiplies this vector by a scalar. The resultant | |
| * vector is supplied as the second parameter and returned. | |
| * | |
| * @param scalar the scalar to multiply this vector by. | |
| * @param product the product to store the result in. | |
| * @return product | |
| */ | |
| public Vector3f mult(float scalar, Vector3f product) { | |
| if (null == product) { | |
| product = new Vector3f(); | |
| } | |
| product.x = x * scalar; | |
| product.y = y * scalar; | |
| product.z = z * scalar; | |
| return product; | |
| } | |
| /** | |
| * <code>multLocal</code> multiplies this vector by a scalar internally, | |
| * and returns a handle to this vector for easy chaining of calls. | |
| * | |
| * @param scalar | |
| * the value to multiply this vector by. | |
| * @return this | |
| */ | |
| public Vector3f multLocal(float scalar) { | |
| x *= scalar; | |
| y *= scalar; | |
| z *= scalar; | |
| return this; | |
| } | |
| /** | |
| * <code>multLocal</code> multiplies a provided vector to this vector | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. If the provided vector is null, null is returned. | |
| * | |
| * @param vec | |
| * the vector to mult to this vector. | |
| * @return this | |
| */ | |
| public Vector3f multLocal(Vector3f vec) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, null returned."); | |
| return null; | |
| } | |
| x *= vec.x; | |
| y *= vec.y; | |
| z *= vec.z; | |
| return this; | |
| } | |
| /** | |
| * <code>multLocal</code> multiplies this vector by 3 scalars | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. | |
| * | |
| * @param x | |
| * @param y | |
| * @param z | |
| * @return this | |
| */ | |
| public Vector3f multLocal(float x, float y, float z) { | |
| this.x *= x; | |
| this.y *= y; | |
| this.z *= z; | |
| return this; | |
| } | |
| /** | |
| * <code>multLocal</code> multiplies a provided vector to this vector | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. If the provided vector is null, null is returned. | |
| * | |
| * @param vec | |
| * the vector to mult to this vector. | |
| * @return this | |
| */ | |
| public Vector3f mult(Vector3f vec) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, null returned."); | |
| return null; | |
| } | |
| return mult(vec, null); | |
| } | |
| /** | |
| * <code>multLocal</code> multiplies a provided vector to this vector | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. If the provided vector is null, null is returned. | |
| * | |
| * @param vec | |
| * the vector to mult to this vector. | |
| * @param store result vector (null to create a new vector) | |
| * @return this | |
| */ | |
| public Vector3f mult(Vector3f vec, Vector3f store) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, null returned."); | |
| return null; | |
| } | |
| if (store == null) store = new Vector3f(); | |
| return store.set(x * vec.x, y * vec.y, z * vec.z); | |
| } | |
| /** | |
| * <code>divide</code> divides the values of this vector by a scalar and | |
| * returns the result. The values of this vector remain untouched. | |
| * | |
| * @param scalar | |
| * the value to divide this vectors attributes by. | |
| * @return the result <code>Vector</code>. | |
| */ | |
| public Vector3f divide(float scalar) { | |
| scalar = 1f/scalar; | |
| return new Vector3f(x * scalar, y * scalar, z * scalar); | |
| } | |
| /** | |
| * <code>divideLocal</code> divides this vector by a scalar internally, | |
| * and returns a handle to this vector for easy chaining of calls. Dividing | |
| * by zero will result in an exception. | |
| * | |
| * @param scalar | |
| * the value to divides this vector by. | |
| * @return this | |
| */ | |
| public Vector3f divideLocal(float scalar) { | |
| scalar = 1f/scalar; | |
| x *= scalar; | |
| y *= scalar; | |
| z *= scalar; | |
| return this; | |
| } | |
| /** | |
| * <code>divide</code> divides the values of this vector by a scalar and | |
| * returns the result. The values of this vector remain untouched. | |
| * | |
| * @param scalar | |
| * the value to divide this vectors attributes by. | |
| * @return the result <code>Vector</code>. | |
| */ | |
| public Vector3f divide(Vector3f scalar) { | |
| return new Vector3f(x / scalar.x, y / scalar.y, z / scalar.z); | |
| } | |
| /** | |
| * <code>divideLocal</code> divides this vector by a scalar internally, | |
| * and returns a handle to this vector for easy chaining of calls. Dividing | |
| * by zero will result in an exception. | |
| * | |
| * @param scalar | |
| * the value to divides this vector by. | |
| * @return this | |
| */ | |
| public Vector3f divideLocal(Vector3f scalar) { | |
| x /= scalar.x; | |
| y /= scalar.y; | |
| z /= scalar.z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>negate</code> returns the negative of this vector. All values are | |
| * negated and set to a new vector. | |
| * | |
| * @return the negated vector. | |
| */ | |
| public Vector3f negate() { | |
| return new Vector3f(-x, -y, -z); | |
| } | |
| /** | |
| * | |
| * <code>negateLocal</code> negates the internal values of this vector. | |
| * | |
| * @return this. | |
| */ | |
| public Vector3f negateLocal() { | |
| x = -x; | |
| y = -y; | |
| z = -z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>subtract</code> subtracts the values of a given vector from those | |
| * of this vector creating a new vector object. If the provided vector is | |
| * null, null is returned. | |
| * | |
| * @param vec | |
| * the vector to subtract from this vector. | |
| * @return the result vector. | |
| */ | |
| public Vector3f subtract(Vector3f vec) { | |
| return new Vector3f(x - vec.x, y - vec.y, z - vec.z); | |
| } | |
| /** | |
| * <code>subtractLocal</code> subtracts a provided vector to this vector | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. If the provided vector is null, null is returned. | |
| * | |
| * @param vec | |
| * the vector to subtract | |
| * @return this | |
| */ | |
| public Vector3f subtractLocal(Vector3f vec) { | |
| if (null == vec) { | |
| logger.warning("Provided vector is null, null returned."); | |
| return null; | |
| } | |
| x -= vec.x; | |
| y -= vec.y; | |
| z -= vec.z; | |
| return this; | |
| } | |
| /** | |
| * | |
| * <code>subtract</code> | |
| * | |
| * @param vec | |
| * the vector to subtract from this | |
| * @param result | |
| * the vector to store the result in | |
| * @return result | |
| */ | |
| public Vector3f subtract(Vector3f vec, Vector3f result) { | |
| if(result == null) { | |
| result = new Vector3f(); | |
| } | |
| result.x = x - vec.x; | |
| result.y = y - vec.y; | |
| result.z = z - vec.z; | |
| return result; | |
| } | |
| /** | |
| * | |
| * <code>subtract</code> subtracts the provided values from this vector, | |
| * creating a new vector that is then returned. | |
| * | |
| * @param subtractX | |
| * the x value to subtract. | |
| * @param subtractY | |
| * the y value to subtract. | |
| * @param subtractZ | |
| * the z value to subtract. | |
| * @return the result vector. | |
| */ | |
| public Vector3f subtract(float subtractX, float subtractY, float subtractZ) { | |
| return new Vector3f(x - subtractX, y - subtractY, z - subtractZ); | |
| } | |
| /** | |
| * <code>subtractLocal</code> subtracts the provided values from this vector | |
| * internally, and returns a handle to this vector for easy chaining of | |
| * calls. | |
| * | |
| * @param subtractX | |
| * the x value to subtract. | |
| * @param subtractY | |
| * the y value to subtract. | |
| * @param subtractZ | |
| * the z value to subtract. | |
| * @return this | |
| */ | |
| public Vector3f subtractLocal(float subtractX, float subtractY, float subtractZ) { | |
| x -= subtractX; | |
| y -= subtractY; | |
| z -= subtractZ; | |
| return this; | |
| } | |
| /** | |
| * <code>normalize</code> returns the unit vector of this vector. | |
| * | |
| * @return unit vector of this vector. | |
| */ | |
| public Vector3f normalize() { | |
| // float length = length(); | |
| // if (length != 0) { | |
| // return divide(length); | |
| // } | |
| // | |
| // return divide(1); | |
| float length = x * x + y * y + z * z; | |
| if (length != 1f && length != 0f){ | |
| length = 1.0f / FastMath.sqrt(length); | |
| return new Vector3f(x * length, y * length, z * length); | |
| } | |
| return clone(); | |
| } | |
| /** | |
| * <code>normalizeLocal</code> makes this vector into a unit vector of | |
| * itself. | |
| * | |
| * @return this. | |
| */ | |
| public Vector3f normalizeLocal() { | |
| // NOTE: this implementation is more optimized | |
| // than the old jme normalize as this method | |
| // is commonly used. | |
| float length = x * x + y * y + z * z; | |
| if (length != 1f && length != 0f){ | |
| length = 1.0f / FastMath.sqrt(length); | |
| x *= length; | |
| y *= length; | |
| z *= length; | |
| } | |
| return this; | |
| } | |
| /** | |
| * <code>maxLocal</code> computes the maximum value for each | |
| * component in this and <code>other</code> vector. The result is stored | |
| * in this vector. | |
| * @param other | |
| */ | |
| public void maxLocal(Vector3f other){ | |
| x = other.x > x ? other.x : x; | |
| y = other.y > y ? other.y : y; | |
| z = other.z > z ? other.z : z; | |
| } | |
| /** | |
| * <code>minLocal</code> computes the minimum value for each | |
| * component in this and <code>other</code> vector. The result is stored | |
| * in this vector. | |
| * @param other | |
| */ | |
| public void minLocal(Vector3f other){ | |
| x = other.x < x ? other.x : x; | |
| y = other.y < y ? other.y : y; | |
| z = other.z < z ? other.z : z; | |
| } | |
| /** | |
| * <code>zero</code> resets this vector's data to zero internally. | |
| */ | |
| public Vector3f zero() { | |
| x = y = z = 0; | |
| return this; | |
| } | |
| /** | |
| * <code>angleBetween</code> returns (in radians) the angle between two vectors. | |
| * It is assumed that both this vector and the given vector are unit vectors (iow, normalized). | |
| * | |
| * @param otherVector a unit vector to find the angle against | |
| * @return the angle in radians. | |
| */ | |
| public float angleBetween(Vector3f otherVector) { | |
| float dotProduct = dot(otherVector); | |
| float angle = FastMath.acos(dotProduct); | |
| return angle; | |
| } | |
| /** | |
| * Sets this vector to the interpolation by changeAmnt from this to the finalVec | |
| * this=(1-changeAmnt)*this + changeAmnt * finalVec | |
| * @param finalVec The final vector to interpolate towards | |
| * @param changeAmnt An amount between 0.0 - 1.0 representing a precentage | |
| * change from this towards finalVec | |
| */ | |
| public Vector3f interpolate(Vector3f finalVec, float changeAmnt) { | |
| this.x=(1-changeAmnt)*this.x + changeAmnt*finalVec.x; | |
| this.y=(1-changeAmnt)*this.y + changeAmnt*finalVec.y; | |
| this.z=(1-changeAmnt)*this.z + changeAmnt*finalVec.z; | |
| return this; | |
| } | |
| /** | |
| * Sets this vector to the interpolation by changeAmnt from beginVec to finalVec | |
| * this=(1-changeAmnt)*beginVec + changeAmnt * finalVec | |
| * @param beginVec the beging vector (changeAmnt=0) | |
| * @param finalVec The final vector to interpolate towards | |
| * @param changeAmnt An amount between 0.0 - 1.0 representing a precentage | |
| * change from beginVec towards finalVec | |
| */ | |
| public Vector3f interpolate(Vector3f beginVec,Vector3f finalVec, float changeAmnt) { | |
| this.x=(1-changeAmnt)*beginVec.x + changeAmnt*finalVec.x; | |
| this.y=(1-changeAmnt)*beginVec.y + changeAmnt*finalVec.y; | |
| this.z=(1-changeAmnt)*beginVec.z + changeAmnt*finalVec.z; | |
| return this; | |
| } | |
| /** | |
| * Check a vector... if it is null or its floats are NaN or infinite, | |
| * return false. Else return true. | |
| * @param vector the vector to check | |
| * @return true or false as stated above. | |
| */ | |
| public static boolean isValidVector(Vector3f vector) { | |
| if (vector == null) return false; | |
| if (Float.isNaN(vector.x) || | |
| Float.isNaN(vector.y) || | |
| Float.isNaN(vector.z)) return false; | |
| if (Float.isInfinite(vector.x) || | |
| Float.isInfinite(vector.y) || | |
| Float.isInfinite(vector.z)) return false; | |
| return true; | |
| } | |
| public static void generateOrthonormalBasis(Vector3f u, Vector3f v, Vector3f w) { | |
| w.normalizeLocal(); | |
| generateComplementBasis(u, v, w); | |
| } | |
| public static void generateComplementBasis(Vector3f u, Vector3f v, | |
| Vector3f w) { | |
| float fInvLength; | |
| if (FastMath.abs(w.x) >= FastMath.abs(w.y)) { | |
| // w.x or w.z is the largest magnitude component, swap them | |
| fInvLength = FastMath.invSqrt(w.x * w.x + w.z * w.z); | |
| u.x = -w.z * fInvLength; | |
| u.y = 0.0f; | |
| u.z = +w.x * fInvLength; | |
| v.x = w.y * u.z; | |
| v.y = w.z * u.x - w.x * u.z; | |
| v.z = -w.y * u.x; | |
| } else { | |
| // w.y or w.z is the largest magnitude component, swap them | |
| fInvLength = FastMath.invSqrt(w.y * w.y + w.z * w.z); | |
| u.x = 0.0f; | |
| u.y = +w.z * fInvLength; | |
| u.z = -w.y * fInvLength; | |
| v.x = w.y * u.z - w.z * u.y; | |
| v.y = -w.x * u.z; | |
| v.z = w.x * u.y; | |
| } | |
| } | |
| @Override | |
| public Vector3f clone() { | |
| try { | |
| return (Vector3f) super.clone(); | |
| } catch (CloneNotSupportedException e) { | |
| throw new AssertionError(); // can not happen | |
| } | |
| } | |
| /** | |
| * Saves this Vector3f into the given float[] object. | |
| * | |
| * @param floats | |
| * The float[] to take this Vector3f. If null, a new float[3] is | |
| * created. | |
| * @return The array, with X, Y, Z float values in that order | |
| */ | |
| public float[] toArray(float[] floats) { | |
| if (floats == null) { | |
| floats = new float[3]; | |
| } | |
| floats[0] = x; | |
| floats[1] = y; | |
| floats[2] = z; | |
| return floats; | |
| } | |
| /** | |
| * are these two vectors the same? they are is they both have the same x,y, | |
| * and z values. | |
| * | |
| * @param o | |
| * the object to compare for equality | |
| * @return true if they are equal | |
| */ | |
| public boolean equals(Object o) { | |
| if (!(o instanceof Vector3f)) { return false; } | |
| if (this == o) { return true; } | |
| Vector3f comp = (Vector3f) o; | |
| if (Float.compare(x,comp.x) != 0) return false; | |
| if (Float.compare(y,comp.y) != 0) return false; | |
| if (Float.compare(z,comp.z) != 0) return false; | |
| return true; | |
| } | |
| /** | |
| * <code>hashCode</code> returns a unique code for this vector object based | |
| * on it's values. If two vectors are logically equivalent, they will return | |
| * the same hash code value. | |
| * @return the hash code value of this vector. | |
| */ | |
| public int hashCode() { | |
| int hash = 37; | |
| hash += 37 * hash + Float.floatToIntBits(x); | |
| hash += 37 * hash + Float.floatToIntBits(y); | |
| hash += 37 * hash + Float.floatToIntBits(z); | |
| return hash; | |
| } | |
| /** | |
| * <code>toString</code> returns the string representation of this vector. | |
| * The format is: | |
| * | |
| * org.jme.math.Vector3f [X=XX.XXXX, Y=YY.YYYY, Z=ZZ.ZZZZ] | |
| * | |
| * @return the string representation of this vector. | |
| */ | |
| public String toString() { | |
| return "(" + x + ", " + y + ", " + z + ")"; | |
| } | |
| public void write(JmeExporter e) throws IOException { | |
| OutputCapsule capsule = e.getCapsule(this); | |
| capsule.write(x, "x", 0); | |
| capsule.write(y, "y", 0); | |
| capsule.write(z, "z", 0); | |
| } | |
| public void read(JmeImporter e) throws IOException { | |
| InputCapsule capsule = e.getCapsule(this); | |
| x = capsule.readFloat("x", 0); | |
| y = capsule.readFloat("y", 0); | |
| z = capsule.readFloat("z", 0); | |
| } | |
| public float getX() { | |
| return x; | |
| } | |
| public Vector3f setX(float x) { | |
| this.x = x; | |
| return this; | |
| } | |
| public float getY() { | |
| return y; | |
| } | |
| public Vector3f setY(float y) { | |
| this.y = y; | |
| return this; | |
| } | |
| public float getZ() { | |
| return z; | |
| } | |
| public Vector3f setZ(float z) { | |
| this.z = z; | |
| return this; | |
| } | |
| /** | |
| * @param index | |
| * @return x value if index == 0, y value if index == 1 or z value if index == | |
| * 2 | |
| * @throws IllegalArgumentException | |
| * if index is not one of 0, 1, 2. | |
| */ | |
| public float get(int index) { | |
| switch (index) { | |
| case 0: | |
| return x; | |
| case 1: | |
| return y; | |
| case 2: | |
| return z; | |
| } | |
| throw new IllegalArgumentException("index must be either 0, 1 or 2"); | |
| } | |
| /** | |
| * @param index | |
| * which field index in this vector to set. | |
| * @param value | |
| * to set to one of x, y or z. | |
| * @throws IllegalArgumentException | |
| * if index is not one of 0, 1, 2. | |
| */ | |
| public void set(int index, float value) { | |
| switch (index) { | |
| case 0: | |
| x = value; | |
| return; | |
| case 1: | |
| y = value; | |
| return; | |
| case 2: | |
| z = value; | |
| return; | |
| } | |
| throw new IllegalArgumentException("index must be either 0, 1 or 2"); | |
| } | |
| } |