| /* |
| * 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; |
| |
| /** |
| * <code>Vector4f</code> defines a Vector for a four float value tuple. |
| * <code>Vector4f</code> can represent any four dimensional value, such as a |
| * vertex, a normal, etc. Utility methods are also included to aid in |
| * mathematical calculations. |
| * |
| * @author Maarten Steur |
| */ |
| public final class Vector4f implements Savable, Cloneable, java.io.Serializable { |
| |
| static final long serialVersionUID = 1; |
| |
| private static final Logger logger = Logger.getLogger(Vector4f.class.getName()); |
| |
| public final static Vector4f ZERO = new Vector4f(0, 0, 0, 0); |
| public final static Vector4f NAN = new Vector4f(Float.NaN, Float.NaN, Float.NaN, Float.NaN); |
| public final static Vector4f UNIT_X = new Vector4f(1, 0, 0, 0); |
| public final static Vector4f UNIT_Y = new Vector4f(0, 1, 0, 0); |
| public final static Vector4f UNIT_Z = new Vector4f(0, 0, 1, 0); |
| public final static Vector4f UNIT_W = new Vector4f(0, 0, 0, 1); |
| public final static Vector4f UNIT_XYZW = new Vector4f(1, 1, 1, 1); |
| public final static Vector4f POSITIVE_INFINITY = new Vector4f( |
| Float.POSITIVE_INFINITY, |
| Float.POSITIVE_INFINITY, |
| Float.POSITIVE_INFINITY, |
| Float.POSITIVE_INFINITY); |
| public final static Vector4f NEGATIVE_INFINITY = new Vector4f( |
| Float.NEGATIVE_INFINITY, |
| 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; |
| |
| /** |
| * the w value of the vector. |
| */ |
| public float w; |
| |
| /** |
| * Constructor instantiates a new <code>Vector3f</code> with default |
| * values of (0,0,0). |
| * |
| */ |
| public Vector4f() { |
| x = y = z = w = 0; |
| } |
| |
| /** |
| * Constructor instantiates a new <code>Vector4f</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. |
| * @param w |
| * the w value of the vector. |
| */ |
| public Vector4f(float x, float y, float z, float w) { |
| this.x = x; |
| this.y = y; |
| this.z = z; |
| this.w = w; |
| } |
| |
| /** |
| * Constructor instantiates a new <code>Vector3f</code> that is a copy |
| * of the provided vector |
| * @param copy The Vector3f to copy |
| */ |
| public Vector4f(Vector4f copy) { |
| this.set(copy); |
| } |
| |
| /** |
| * <code>set</code> sets the x,y,z,w 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. |
| * @param w |
| * the w value of the vector. |
| * @return this vector |
| */ |
| public Vector4f set(float x, float y, float z, float w) { |
| this.x = x; |
| this.y = y; |
| this.z = z; |
| this.w = w; |
| 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 Vector4f set(Vector4f vect) { |
| this.x = vect.x; |
| this.y = vect.y; |
| this.z = vect.z; |
| this.w = vect.w; |
| 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 Vector4f add(Vector4f vec) { |
| if (null == vec) { |
| logger.warning("Provided vector is null, null returned."); |
| return null; |
| } |
| return new Vector4f(x + vec.x, y + vec.y, z + vec.z, w + vec.w); |
| } |
| |
| /** |
| * |
| * <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 Vector4f add(Vector4f vec, Vector4f result) { |
| result.x = x + vec.x; |
| result.y = y + vec.y; |
| result.z = z + vec.z; |
| result.w = w + vec.w; |
| 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 Vector4f addLocal(Vector4f vec) { |
| if (null == vec) { |
| logger.warning("Provided vector is null, null returned."); |
| return null; |
| } |
| x += vec.x; |
| y += vec.y; |
| z += vec.z; |
| w += vec.w; |
| 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 Vector4f add(float addX, float addY, float addZ, float addW) { |
| return new Vector4f(x + addX, y + addY, z + addZ, w + addW); |
| } |
| |
| /** |
| * <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 Vector4f addLocal(float addX, float addY, float addZ, float addW) { |
| x += addX; |
| y += addY; |
| z += addZ; |
| w += addW; |
| 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 Vector4f scaleAdd(float scalar, Vector4f add) { |
| x = x * scalar + add.x; |
| y = y * scalar + add.y; |
| z = z * scalar + add.z; |
| w = w * scalar + add.w; |
| 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 Vector4f scaleAdd(float scalar, Vector4f mult, Vector4f add) { |
| this.x = mult.x * scalar + add.x; |
| this.y = mult.y * scalar + add.y; |
| this.z = mult.z * scalar + add.z; |
| this.w = mult.w * scalar + add.w; |
| 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(Vector4f vec) { |
| if (null == vec) { |
| logger.warning("Provided vector is null, 0 returned."); |
| return 0; |
| } |
| return x * vec.x + y * vec.y + z * vec.z + w * vec.w; |
| } |
| |
| public Vector4f project(Vector4f other){ |
| float n = this.dot(other); // A . B |
| float d = other.lengthSquared(); // |B|^2 |
| return new Vector4f(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 + w * w; |
| } |
| |
| /** |
| * <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(Vector4f v) { |
| double dx = x - v.x; |
| double dy = y - v.y; |
| double dz = z - v.z; |
| double dw = w - v.w; |
| return (float) (dx * dx + dy * dy + dz * dz + dw * dw); |
| } |
| |
| /** |
| * <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(Vector4f 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 Vector4f mult(float scalar) { |
| return new Vector4f(x * scalar, y * scalar, z * scalar, w * 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 Vector4f mult(float scalar, Vector4f product) { |
| if (null == product) { |
| product = new Vector4f(); |
| } |
| |
| product.x = x * scalar; |
| product.y = y * scalar; |
| product.z = z * scalar; |
| product.w = w * 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 Vector4f multLocal(float scalar) { |
| x *= scalar; |
| y *= scalar; |
| z *= scalar; |
| w *= 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 Vector4f multLocal(Vector4f vec) { |
| if (null == vec) { |
| logger.warning("Provided vector is null, null returned."); |
| return null; |
| } |
| x *= vec.x; |
| y *= vec.y; |
| z *= vec.z; |
| w *= vec.w; |
| 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 |
| * @param w |
| * @return this |
| */ |
| public Vector4f multLocal(float x, float y, float z, float w) { |
| this.x *= x; |
| this.y *= y; |
| this.z *= z; |
| this.w *= w; |
| 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 Vector4f mult(Vector4f 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 Vector4f mult(Vector4f vec, Vector4f store) { |
| if (null == vec) { |
| logger.warning("Provided vector is null, null returned."); |
| return null; |
| } |
| if (store == null) store = new Vector4f(); |
| return store.set(x * vec.x, y * vec.y, z * vec.z, w * vec.w); |
| } |
| |
| /** |
| * <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 Vector4f divide(float scalar) { |
| scalar = 1f/scalar; |
| return new Vector4f(x * scalar, y * scalar, z * scalar, w * 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 Vector4f divideLocal(float scalar) { |
| scalar = 1f/scalar; |
| x *= scalar; |
| y *= scalar; |
| z *= scalar; |
| w *= 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 Vector4f divide(Vector4f scalar) { |
| return new Vector4f(x / scalar.x, y / scalar.y, z / scalar.z, w / scalar.w); |
| } |
| |
| /** |
| * <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 Vector4f divideLocal(Vector4f scalar) { |
| x /= scalar.x; |
| y /= scalar.y; |
| z /= scalar.z; |
| w /= scalar.w; |
| 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 Vector4f negate() { |
| return new Vector4f(-x, -y, -z, -w); |
| } |
| |
| /** |
| * |
| * <code>negateLocal</code> negates the internal values of this vector. |
| * |
| * @return this. |
| */ |
| public Vector4f negateLocal() { |
| x = -x; |
| y = -y; |
| z = -z; |
| w = -w; |
| 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 Vector4f subtract(Vector4f vec) { |
| return new Vector4f(x - vec.x, y - vec.y, z - vec.z, w - vec.w); |
| } |
| |
| /** |
| * <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 Vector4f subtractLocal(Vector4f vec) { |
| if (null == vec) { |
| logger.warning("Provided vector is null, null returned."); |
| return null; |
| } |
| x -= vec.x; |
| y -= vec.y; |
| z -= vec.z; |
| w -= vec.w; |
| 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 Vector4f subtract(Vector4f vec, Vector4f result) { |
| if(result == null) { |
| result = new Vector4f(); |
| } |
| result.x = x - vec.x; |
| result.y = y - vec.y; |
| result.z = z - vec.z; |
| result.w = w - vec.w; |
| 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. |
| * @param subtractW |
| * the w value to subtract. |
| * @return the result vector. |
| */ |
| public Vector4f subtract(float subtractX, float subtractY, float subtractZ, float subtractW) { |
| return new Vector4f(x - subtractX, y - subtractY, z - subtractZ, w - subtractW); |
| } |
| |
| /** |
| * <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. |
| * @param subtractW |
| * the w value to subtract. |
| * @return this |
| */ |
| public Vector4f subtractLocal(float subtractX, float subtractY, float subtractZ, float subtractW) { |
| x -= subtractX; |
| y -= subtractY; |
| z -= subtractZ; |
| w -= subtractW; |
| return this; |
| } |
| |
| /** |
| * <code>normalize</code> returns the unit vector of this vector. |
| * |
| * @return unit vector of this vector. |
| */ |
| public Vector4f normalize() { |
| // float length = length(); |
| // if (length != 0) { |
| // return divide(length); |
| // } |
| // |
| // return divide(1); |
| float length = x * x + y * y + z * z + w * w; |
| if (length != 1f && length != 0f){ |
| length = 1.0f / FastMath.sqrt(length); |
| return new Vector4f(x * length, y * length, z * length, w * length); |
| } |
| return clone(); |
| } |
| |
| /** |
| * <code>normalizeLocal</code> makes this vector into a unit vector of |
| * itself. |
| * |
| * @return this. |
| */ |
| public Vector4f 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 + w * w; |
| if (length != 1f && length != 0f){ |
| length = 1.0f / FastMath.sqrt(length); |
| x *= length; |
| y *= length; |
| z *= length; |
| w *= 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(Vector4f other){ |
| x = other.x > x ? other.x : x; |
| y = other.y > y ? other.y : y; |
| z = other.z > z ? other.z : z; |
| w = other.w > w ? other.w : w; |
| } |
| |
| /** |
| * <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(Vector4f other){ |
| x = other.x < x ? other.x : x; |
| y = other.y < y ? other.y : y; |
| z = other.z < z ? other.z : z; |
| w = other.w < w ? other.w : w; |
| } |
| |
| /** |
| * <code>zero</code> resets this vector's data to zero internally. |
| */ |
| public Vector4f zero() { |
| x = y = z = w = 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(Vector4f 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 Vector4f interpolate(Vector4f 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; |
| this.w=(1-changeAmnt)*this.w + changeAmnt*finalVec.w; |
| 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 Vector4f interpolate(Vector4f beginVec,Vector4f 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; |
| this.w=(1-changeAmnt)*beginVec.w + changeAmnt*finalVec.w; |
| 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(Vector4f vector) { |
| if (vector == null) return false; |
| if (Float.isNaN(vector.x) || |
| Float.isNaN(vector.y) || |
| Float.isNaN(vector.z)|| |
| Float.isNaN(vector.w)) return false; |
| if (Float.isInfinite(vector.x) || |
| Float.isInfinite(vector.y) || |
| Float.isInfinite(vector.z) || |
| Float.isInfinite(vector.w)) return false; |
| return true; |
| } |
| |
| @Override |
| public Vector4f clone() { |
| try { |
| return (Vector4f) 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[4]; |
| } |
| floats[0] = x; |
| floats[1] = y; |
| floats[2] = z; |
| floats[3] = w; |
| 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 Vector4f)) { return false; } |
| |
| if (this == o) { return true; } |
| |
| Vector4f comp = (Vector4f) 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; |
| if (Float.compare(w,comp.w) != 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); |
| hash += 37 * hash + Float.floatToIntBits(w); |
| 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, W=WW.WWWW] |
| * |
| * @return the string representation of this vector. |
| */ |
| public String toString() { |
| return "(" + x + ", " + y + ", " + z + ", " + w + ")"; |
| } |
| |
| 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); |
| capsule.write(w, "w", 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); |
| w = capsule.readFloat("w", 0); |
| } |
| |
| public float getX() { |
| return x; |
| } |
| |
| public Vector4f setX(float x) { |
| this.x = x; |
| return this; |
| } |
| |
| public float getY() { |
| return y; |
| } |
| |
| public Vector4f setY(float y) { |
| this.y = y; |
| return this; |
| } |
| |
| public float getZ() { |
| return z; |
| } |
| |
| public Vector4f setZ(float z) { |
| this.z = z; |
| return this; |
| } |
| |
| public float getW() { |
| return w; |
| } |
| |
| public Vector4f setW(float w) { |
| this.w = w; |
| 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; |
| case 3: |
| return w; |
| } |
| throw new IllegalArgumentException("index must be either 0, 1, 2 or 3"); |
| } |
| |
| /** |
| * @param index |
| * which field index in this vector to set. |
| * @param value |
| * to set to one of x, y, z or w. |
| * @throws IllegalArgumentException |
| * if index is not one of 0, 1, 2, 3. |
| */ |
| public void set(int index, float value) { |
| switch (index) { |
| case 0: |
| x = value; |
| return; |
| case 1: |
| y = value; |
| return; |
| case 2: |
| z = value; |
| return; |
| case 3: |
| w = value; |
| return; |
| } |
| throw new IllegalArgumentException("index must be either 0, 1, 2 or 3"); |
| } |
| |
| } |
