331 lines
7.9 KiB
Java
331 lines
7.9 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package io.github.hydos.ginger.engine.math.vectors;
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import java.io.Serializable;
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import java.nio.FloatBuffer;
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/** Holds a 4-tuple vector.
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*
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* @author cix_foo <cix_foo@users.sourceforge.net>
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* @version $Revision$
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* $Id$ */
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public class Vector4f extends Vector implements Serializable, ReadableVector4f, WritableVector4f
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{
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private static final long serialVersionUID = 1L;
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public float x, y, z, w;
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/** Constructor for Vector4f. */
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public Vector4f()
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{ super(); }
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/** Constructor */
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public Vector4f(ReadableVector4f src)
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{ set(src); }
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/** Constructor */
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public Vector4f(float x, float y, float z, float w)
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{ set(x, y, z, w); }
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/* (non-Javadoc)
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* @see org.lwjgl.util.vector.WritableVector2f#set(float, float)
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*/
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@Override
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public void set(float x, float y)
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{
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this.x = x;
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this.y = y;
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}
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/* (non-Javadoc)
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* @see org.lwjgl.util.vector.WritableVector3f#set(float, float, float)
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*/
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@Override
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public void set(float x, float y, float z)
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{
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this.x = x;
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this.y = y;
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this.z = z;
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}
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/* (non-Javadoc)
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* @see org.lwjgl.util.vector.WritableVector4f#set(float, float, float, float)
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*/
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@Override
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public void set(float x, float y, float z, float w)
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{
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this.x = x;
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this.y = y;
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this.z = z;
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this.w = w;
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}
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/** Load from another Vector4f
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*
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* @param src The source vector
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* @return this */
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public Vector4f set(ReadableVector4f src)
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{
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x = src.getX();
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y = src.getY();
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z = src.getZ();
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w = src.getW();
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return this;
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}
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/** @return the length squared of the vector */
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@Override
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public float lengthSquared()
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{ return x * x + y * y + z * z + w * w; }
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/** Translate a vector
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*
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* @param x The translation in x
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* @param y the translation in y
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* @return this */
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public Vector4f translate(float x, float y, float z, float w)
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{
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this.x += x;
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this.y += y;
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this.z += z;
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this.w += w;
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return this;
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}
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/** Add a vector to another vector and place the result in a destination
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* vector.
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*
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* @param left The LHS vector
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* @param right The RHS vector
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* @param dest The destination vector, or null if a new vector is to be created
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* @return the sum of left and right in dest */
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public static Vector4f add(Vector4f left, Vector4f right, Vector4f dest)
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{
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if (dest == null)
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return new Vector4f(left.x + right.x, left.y + right.y, left.z + right.z, left.w + right.w);
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else
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{
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dest.set(left.x + right.x, left.y + right.y, left.z + right.z, left.w + right.w);
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return dest;
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}
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}
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/** Subtract a vector from another vector and place the result in a destination
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* vector.
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*
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* @param left The LHS vector
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* @param right The RHS vector
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* @param dest The destination vector, or null if a new vector is to be created
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* @return left minus right in dest */
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public static Vector4f sub(Vector4f left, Vector4f right, Vector4f dest)
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{
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if (dest == null)
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return new Vector4f(left.x - right.x, left.y - right.y, left.z - right.z, left.w - right.w);
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else
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{
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dest.set(left.x - right.x, left.y - right.y, left.z - right.z, left.w - right.w);
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return dest;
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}
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}
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/** Negate a vector
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*
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* @return this */
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@Override
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public Vector negate()
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{
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x = -x;
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y = -y;
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z = -z;
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w = -w;
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return this;
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}
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/** Negate a vector and place the result in a destination vector.
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*
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* @param dest The destination vector or null if a new vector is to be created
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* @return the negated vector */
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public Vector4f negate(Vector4f dest)
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{
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if (dest == null)
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dest = new Vector4f();
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dest.x = -x;
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dest.y = -y;
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dest.z = -z;
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dest.w = -w;
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return dest;
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}
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/** Normalise this vector and place the result in another vector.
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*
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* @param dest The destination vector, or null if a new vector is to be created
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* @return the normalised vector */
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public Vector4f normalise(Vector4f dest)
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{
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float l = length();
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if (dest == null)
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dest = new Vector4f(x / l, y / l, z / l, w / l);
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else
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dest.set(x / l, y / l, z / l, w / l);
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return dest;
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}
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/** The dot product of two vectors is calculated as
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* v1.x * v2.x + v1.y * v2.y + v1.z * v2.z + v1.w * v2.w
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*
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* @param left The LHS vector
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* @param right The RHS vector
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* @return left dot right */
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public static float dot(Vector4f left, Vector4f right)
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{ return left.x * right.x + left.y * right.y + left.z * right.z + left.w * right.w; }
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/** Calculate the angle between two vectors, in radians
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*
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* @param a A vector
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* @param b The other vector
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* @return the angle between the two vectors, in radians */
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public static float angle(Vector4f a, Vector4f b)
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{
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float dls = dot(a, b) / (a.length() * b.length());
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if (dls < -1f)
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dls = -1f;
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else if (dls > 1.0f)
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dls = 1.0f;
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return (float) Math.acos(dls);
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}
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/* (non-Javadoc)
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* @see org.lwjgl.vector.Vector#load(FloatBuffer)
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*/
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@Override
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public Vector load(FloatBuffer buf)
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{
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x = buf.get();
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y = buf.get();
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z = buf.get();
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w = buf.get();
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return this;
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}
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/* (non-Javadoc)
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* @see org.lwjgl.vector.Vector#scale(float)
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*/
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@Override
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public Vector scale(float scale)
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{
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x *= scale;
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y *= scale;
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z *= scale;
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w *= scale;
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return this;
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}
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/* (non-Javadoc)
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* @see org.lwjgl.vector.Vector#store(FloatBuffer)
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*/
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@Override
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public Vector store(FloatBuffer buf)
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{
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buf.put(x);
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buf.put(y);
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buf.put(z);
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buf.put(w);
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return this;
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}
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@Override
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public String toString()
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{ return "Vector4f: " + x + " " + y + " " + z + " " + w; }
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/** @return x */
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@Override
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public final float getX()
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{ return x; }
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/** @return y */
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@Override
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public final float getY()
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{ return y; }
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/** Set X
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*
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* @param x */
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@Override
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public final void setX(float x)
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{ this.x = x; }
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/** Set Y
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*
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* @param y */
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@Override
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public final void setY(float y)
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{ this.y = y; }
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/** Set Z
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*
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* @param z */
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@Override
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public void setZ(float z)
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{ this.z = z; }
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/* (Overrides)
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* @see org.lwjgl.vector.ReadableVector3f#getZ()
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*/
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@Override
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public float getZ()
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{ return z; }
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/** Set W
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*
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* @param w */
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@Override
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public void setW(float w)
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{ this.w = w; }
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/* (Overrides)
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* @see org.lwjgl.vector.ReadableVector3f#getZ()
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*/
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@Override
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public float getW()
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{ return w; }
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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 (getClass() != obj.getClass()) return false;
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Vector4f other = (Vector4f) obj;
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if (x == other.x && y == other.y && z == other.z && w == other.w) return true;
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return false;
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}
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} |