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-/*
- * Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Sun designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Sun in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- */
-
-package javax.vecmath;
-
-
-/**
- * A generic 2-element tuple that is represented by double-precision
- * floating point x,y coordinates.
- *
- */
-public abstract class Tuple2d implements java.io.Serializable, Cloneable {
-
- static final long serialVersionUID = 6205762482756093838L;
-
- /**
- * The x coordinate.
- */
- public double x;
-
- /**
- * The y coordinate.
- */
- public double y;
-
-
- /**
- * Constructs and initializes a Tuple2d from the specified xy coordinates.
- * @param x the x coordinate
- * @param y the y coordinate
- */
- public Tuple2d(double x, double y)
- {
- this.x = x;
- this.y = y;
- }
-
-
- /**
- * Constructs and initializes a Tuple2d from the specified array.
- * @param t the array of length 2 containing xy in order
- */
- public Tuple2d(double[] t)
- {
- this.x = t[0];
- this.y = t[1];
- }
-
-
- /**
- * Constructs and initializes a Tuple2d from the specified Tuple2d.
- * @param t1 the Tuple2d containing the initialization x y data
- */
- public Tuple2d(Tuple2d t1)
- {
- this.x = t1.x;
- this.y = t1.y;
- }
-
-
- /**
- * Constructs and initializes a Tuple2d from the specified Tuple2f.
- * @param t1 the Tuple2f containing the initialization x y data
- */
- public Tuple2d(Tuple2f t1)
- {
- this.x = (double) t1.x;
- this.y = (double) t1.y;
- }
-
- /**
- * Constructs and initializes a Tuple2d to (0,0).
- */
- public Tuple2d()
- {
- this.x = 0.0;
- this.y = 0.0;
- }
-
-
- /**
- * Sets the value of this tuple to the specified xy coordinates.
- * @param x the x coordinate
- * @param y the y coordinate
- */
- public final void set(double x, double y)
- {
- this.x = x;
- this.y = y;
- }
-
-
- /**
- * Sets the value of this tuple from the 2 values specified in
- * the array.
- * @param t the array of length 2 containing xy in order
- */
- public final void set(double[] t)
- {
- this.x = t[0];
- this.y = t[1];
- }
-
-
- /**
- * Sets the value of this tuple to the value of the Tuple2d argument.
- * @param t1 the tuple to be copied
- */
- public final void set(Tuple2d t1)
- {
- this.x = t1.x;
- this.y = t1.y;
- }
-
-
- /**
- * Sets the value of this tuple to the value of Tuple2f t1.
- * @param t1 the tuple to be copied
- */
- public final void set(Tuple2f t1)
- {
- this.x = (double) t1.x;
- this.y = (double) t1.y;
- }
-
- /**
- * Copies the value of the elements of this tuple into the array t.
- * @param t the array that will contain the values of the vector
- */
- public final void get(double[] t)
- {
- t[0] = this.x;
- t[1] = this.y;
- }
-
-
- /**
- * Sets the value of this tuple to the vector sum of tuples t1 and t2.
- * @param t1 the first tuple
- * @param t2 the second tuple
- */
- public final void add(Tuple2d t1, Tuple2d t2)
- {
- this.x = t1.x + t2.x;
- this.y = t1.y + t2.y;
- }
-
-
- /**
- * Sets the value of this tuple to the vector sum of itself and tuple t1.
- * @param t1 the other tuple
- */
- public final void add(Tuple2d t1)
- {
- this.x += t1.x;
- this.y += t1.y;
- }
-
-
- /**
- * Sets the value of this tuple to the vector difference of
- * tuple t1 and t2 (this = t1 - t2).
- * @param t1 the first tuple
- * @param t2 the second tuple
- */
- public final void sub(Tuple2d t1, Tuple2d t2)
- {
- this.x = t1.x - t2.x;
- this.y = t1.y - t2.y;
- }
-
-
- /**
- * Sets the value of this tuple to the vector difference of
- * itself and tuple t1 (this = this - t1).
- * @param t1 the other vector
- */
- public final void sub(Tuple2d t1)
- {
- this.x -= t1.x;
- this.y -= t1.y;
- }
-
-
- /**
- * Sets the value of this tuple to the negation of tuple t1.
- * @param t1 the source vector
- */
- public final void negate(Tuple2d t1)
- {
- this.x = -t1.x;
- this.y = -t1.y;
- }
-
-
- /**
- * Negates the value of this vector in place.
- */
- public final void negate()
- {
- this.x = -this.x;
- this.y = -this.y;
- }
-
-
- /**
- * Sets the value of this tuple to the scalar multiplication
- * of tuple t1.
- * @param s the scalar value
- * @param t1 the source tuple
- */
- public final void scale(double s, Tuple2d t1)
- {
- this.x = s*t1.x;
- this.y = s*t1.y;
- }
-
-
- /**
- * Sets the value of this tuple to the scalar multiplication
- * of itself.
- * @param s the scalar value
- */
- public final void scale(double s)
- {
- this.x *= s;
- this.y *= s;
- }
-
-
- /**
- * Sets the value of this tuple to the scalar multiplication
- * of tuple t1 and then adds tuple t2 (this = s*t1 + t2).
- * @param s the scalar value
- * @param t1 the tuple to be multipled
- * @param t2 the tuple to be added
- */
- public final void scaleAdd(double s, Tuple2d t1, Tuple2d t2)
- {
- this.x = s*t1.x + t2.x;
- this.y = s*t1.y + t2.y;
- }
-
-
- /**
- * Sets the value of this tuple to the scalar multiplication
- * of itself and then adds tuple t1 (this = s*this + t1).
- * @param s the scalar value
- * @param t1 the tuple to be added
- */
- public final void scaleAdd(double s, Tuple2d t1)
- {
- this.x = s*this.x + t1.x;
- this.y = s*this.y + t1.y;
- }
-
-
-
- /**
- * Returns a hash code value based on the data values in this
- * object. Two different Tuple2d objects with identical data values
- * (i.e., Tuple2d.equals returns true) will return the same hash
- * code value. Two objects with different data members may return the
- * same hash value, although this is not likely.
- * @return the integer hash code value
- */
- @Override
- public int hashCode() {
- long bits = 1L;
- bits = VecMathUtil.hashDoubleBits(bits, x);
- bits = VecMathUtil.hashDoubleBits(bits, y);
- return VecMathUtil.hashFinish(bits);
- }
-
-
- /**
- * Returns true if all of the data members of Tuple2d t1 are
- * equal to the corresponding data members in this Tuple2d.
- * @param t1 the vector with which the comparison is made
- * @return true or false
- */
- public boolean equals(Tuple2d t1)
- {
- try {
- return(this.x == t1.x && this.y == t1.y);
- }
- catch (NullPointerException e2) {return false;}
-
- }
-
- /**
- * Returns true if the Object t1 is of type Tuple2d and all of the
- * data members of t1 are equal to the corresponding data members in
- * this Tuple2d.
- * @param t1 the object with which the comparison is made
- * @return true or false
- */
- @Override
- public boolean equals(Object t1)
- {
- try {
- Tuple2d t2 = (Tuple2d) t1;
- return(this.x == t2.x && this.y == t2.y);
- }
- catch (NullPointerException e2) {return false;}
- catch (ClassCastException e1) {return false;}
-
- }
-
- /**
- * Returns true if the L-infinite distance between this tuple
- * and tuple t1 is less than or equal to the epsilon parameter,
- * otherwise returns false. The L-infinite
- * distance is equal to MAX[abs(x1-x2), abs(y1-y2)].
- * @param t1 the tuple to be compared to this tuple
- * @param epsilon the threshold value
- * @return true or false
- */
- public boolean epsilonEquals(Tuple2d t1, double epsilon)
- {
- double diff;
-
- diff = x - t1.x;
- if(Double.isNaN(diff)) return false;
- if((diff<0?-diff:diff) > epsilon) return false;
-
- diff = y - t1.y;
- if(Double.isNaN(diff)) return false;
- if((diff<0?-diff:diff) > epsilon) return false;
-
- return true;
- }
-
- /**
- * Returns a string that contains the values of this Tuple2d.
- * The form is (x,y).
- * @return the String representation
- */
- @Override
- public String toString()
- {
- return("(" + this.x + ", " + this.y + ")");
- }
-
-
- /**
- * Clamps the tuple parameter to the range [low, high] and
- * places the values into this tuple.
- * @param min the lowest value in the tuple after clamping
- * @param max the highest value in the tuple after clamping
- * @param t the source tuple, which will not be modified
- */
- public final void clamp(double min, double max, Tuple2d t)
- {
- if( t.x > max ) {
- x = max;
- } else if( t.x < min ){
- x = min;
- } else {
- x = t.x;
- }
-
- if( t.y > max ) {
- y = max;
- } else if( t.y < min ){
- y = min;
- } else {
- y = t.y;
- }
-
- }
-
-
- /**
- * Clamps the minimum value of the tuple parameter to the min
- * parameter and places the values into this tuple.
- * @param min the lowest value in the tuple after clamping
- * @param t the source tuple, which will not be modified
- */
- public final void clampMin(double min, Tuple2d t)
- {
- if( t.x < min ) {
- x = min;
- } else {
- x = t.x;
- }
-
- if( t.y < min ) {
- y = min;
- } else {
- y = t.y;
- }
-
- }
-
-
- /**
- * Clamps the maximum value of the tuple parameter to the max
- * parameter and places the values into this tuple.
- * @param max the highest value in the tuple after clamping
- * @param t the source tuple, which will not be modified
- */
- public final void clampMax(double max, Tuple2d t)
- {
- if( t.x > max ) {
- x = max;
- } else {
- x = t.x;
- }
-
- if( t.y > max ) {
- y = max;
- } else {
- y = t.y;
- }
-
- }
-
-
- /**
- * Sets each component of the tuple parameter to its absolute
- * value and places the modified values into this tuple.
- * @param t the source tuple, which will not be modified
- */
- public final void absolute(Tuple2d t)
- {
- x = Math.abs(t.x);
- y = Math.abs(t.y);
- }
-
-
-
- /**
- * Clamps this tuple to the range [low, high].
- * @param min the lowest value in this tuple after clamping
- * @param max the highest value in this tuple after clamping
- */
- public final void clamp(double min, double max)
- {
- if( x > max ) {
- x = max;
- } else if( x < min ){
- x = min;
- }
-
- if( y > max ) {
- y = max;
- } else if( y < min ){
- y = min;
- }
-
- }
-
-
- /**
- * Clamps the minimum value of this tuple to the min parameter.
- * @param min the lowest value in this tuple after clamping
- */
- public final void clampMin(double min)
- {
- if( x < min ) x=min;
- if( y < min ) y=min;
- }
-
-
- /**
- * Clamps the maximum value of this tuple to the max parameter.
- * @param max the highest value in the tuple after clamping
- */
- public final void clampMax(double max)
- {
- if( x > max ) x=max;
- if( y > max ) y=max;
- }
-
-
- /**
- * Sets each component of this tuple to its absolute value.
- */
- public final void absolute()
- {
- x = Math.abs(x);
- y = Math.abs(y);
- }
-
-
- /**
- * Linearly interpolates between tuples t1 and t2 and places the
- * result into this tuple: this = (1-alpha)*t1 + alpha*t2.
- * @param t1 the first tuple
- * @param t2 the second tuple
- * @param alpha the alpha interpolation parameter
- */
- public final void interpolate(Tuple2d t1, Tuple2d t2, double alpha)
- {
- this.x = (1-alpha)*t1.x + alpha*t2.x;
- this.y = (1-alpha)*t1.y + alpha*t2.y;
- }
-
-
- /**
- * Linearly interpolates between this tuple and tuple t1 and
- * places the result into this tuple: this = (1-alpha)*this + alpha*t1.
- * @param t1 the first tuple
- * @param alpha the alpha interpolation parameter
- */
- public final void interpolate(Tuple2d t1, double alpha)
- {
- this.x = (1-alpha)*this.x + alpha*t1.x;
- this.y = (1-alpha)*this.y + alpha*t1.y;
-
- }
-
- /**
- * Creates a new object of the same class as this object.
- *
- * @return a clone of this instance.
- * @exception OutOfMemoryError if there is not enough memory.
- * @see java.lang.Cloneable
- * @since vecmath 1.3
- */
- @Override
- public Object clone() {
- // Since there are no arrays we can just use Object.clone()
- try {
- return super.clone();
- } catch (CloneNotSupportedException e) {
- // this shouldn't happen, since we are Cloneable
- throw new InternalError();
- }
- }
-
-
- /**
- * Get the <i>x</i> coordinate.
- *
- * @return the <i>x</i> coordinate.
- *
- * @since vecmath 1.5
- */
- public final double getX() {
- return x;
- }
-
-
- /**
- * Set the <i>x</i> coordinate.
- *
- * @param x value to <i>x</i> coordinate.
- *
- * @since vecmath 1.5
- */
- public final void setX(double x) {
- this.x = x;
- }
-
-
- /**
- * Get the <i>y</i> coordinate.
- *
- * @return the <i>y</i> coordinate.
- *
- * @since vecmath 1.5
- */
- public final double getY() {
- return y;
- }
-
-
- /**
- * Set the <i>y</i> coordinate.
- *
- * @param y value to <i>y</i> coordinate.
- *
- * @since vecmath 1.5
- */
- public final void setY(double y) {
- this.y = y;
- }
-
-}
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