/*
* $RCSfile: Tuple4f.java,v $
*
* Copyright 1997-2008 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.
*
* $Revision: 1.8 $
* $Date: 2008/02/28 20:18:51 $
* $State: Exp $
*/
package javax.vecmath;
import java.lang.Math;
/**
* A 4-element tuple represented by single-precision floating point x,y,z,w
* coordinates.
*
*/
public abstract class Tuple4f implements java.io.Serializable, Cloneable {
static final long serialVersionUID = 7068460319248845763L;
/**
* The x coordinate.
*/
public float x;
/**
* The y coordinate.
*/
public float y;
/**
* The z coordinate.
*/
public float z;
/**
* The w coordinate.
*/
public float w;
/**
* Constructs and initializes a Tuple4f from the specified xyzw coordinates.
* @param x the x coordinate
* @param y the y coordinate
* @param z the z coordinate
* @param w the w coordinate
*/
public Tuple4f(float x, float y, float z, float w)
{
this.x = x;
this.y = y;
this.z = z;
this.w = w;
}
/**
* Constructs and initializes a Tuple4f from the array of length 4.
* @param t the array of length 4 containing xyzw in order
*/
public Tuple4f(float[] t)
{
this.x = t[0];
this.y = t[1];
this.z = t[2];
this.w = t[3];
}
/**
* Constructs and initializes a Tuple4f from the specified Tuple4f.
* @param t1 the Tuple4f containing the initialization x y z w data
*/
public Tuple4f(Tuple4f t1)
{
this.x = t1.x;
this.y = t1.y;
this.z = t1.z;
this.w = t1.w;
}
/**
* Constructs and initializes a Tuple4f from the specified Tuple4d.
* @param t1 the Tuple4d containing the initialization x y z w data
*/
public Tuple4f(Tuple4d t1)
{
this.x = (float) t1.x;
this.y = (float) t1.y;
this.z = (float) t1.z;
this.w = (float) t1.w;
}
/**
* Constructs and initializes a Tuple4f to (0,0,0,0).
*/
public Tuple4f()
{
this.x = 0.0f;
this.y = 0.0f;
this.z = 0.0f;
this.w = 0.0f;
}
/**
* Sets the value of this tuple to the specified xyzw coordinates.
* @param x the x coordinate
* @param y the y coordinate
* @param z the z coordinate
* @param w the w coordinate
*/
public final void set(float x, float y, float z, float w)
{
this.x = x;
this.y = y;
this.z = z;
this.w = w;
}
/**
* Sets the value of this tuple to the specified coordinates in the
* array of length 4.
* @param t the array of length 4 containing xyzw in order
*/
public final void set(float[] t)
{
this.x = t[0];
this.y = t[1];
this.z = t[2];
this.w = t[3];
}
/**
* Sets the value of this tuple to the value of tuple t1.
* @param t1 the tuple to be copied
*/
public final void set(Tuple4f t1)
{
this.x = t1.x;
this.y = t1.y;
this.z = t1.z;
this.w = t1.w;
}
/**
* Sets the value of this tuple to the value of tuple t1.
* @param t1 the tuple to be copied
*/
public final void set(Tuple4d t1)
{
this.x = (float) t1.x;
this.y = (float) t1.y;
this.z = (float) t1.z;
this.w = (float) t1.w;
}
/**
* Copies the values of this tuple into the array t.
* @param t the array
*/
public final void get(float[] t)
{
t[0] = this.x;
t[1] = this.y;
t[2] = this.z;
t[3] = this.w;
}
/**
* Copies the values of this tuple into the tuple t.
* @param t the target tuple
*/
public final void get(Tuple4f t)
{
t.x = this.x;
t.y = this.y;
t.z = this.z;
t.w = this.w;
}
/**
* Sets the value of this tuple to the sum of tuples t1 and t2.
* @param t1 the first tuple
* @param t2 the second tuple
*/
public final void add(Tuple4f t1, Tuple4f t2)
{
this.x = t1.x + t2.x;
this.y = t1.y + t2.y;
this.z = t1.z + t2.z;
this.w = t1.w + t2.w;
}
/**
* Sets the value of this tuple to the sum of itself and t1.
* @param t1 the other tuple
*/
public final void add(Tuple4f t1)
{
this.x += t1.x;
this.y += t1.y;
this.z += t1.z;
this.w += t1.w;
}
/**
* Sets the value of this tuple to the difference
* of tuples t1 and t2 (this = t1 - t2).
* @param t1 the first tuple
* @param t2 the second tuple
*/
public final void sub(Tuple4f t1, Tuple4f t2)
{
this.x = t1.x - t2.x;
this.y = t1.y - t2.y;
this.z = t1.z - t2.z;
this.w = t1.w - t2.w;
}
/**
* Sets the value of this tuple to the difference
* of itself and t1 (this = this - t1).
* @param t1 the other tuple
*/
public final void sub(Tuple4f t1)
{
this.x -= t1.x;
this.y -= t1.y;
this.z -= t1.z;
this.w -= t1.w;
}
/**
* Sets the value of this tuple to the negation of tuple t1.
* @param t1 the source tuple
*/
public final void negate(Tuple4f t1)
{
this.x = -t1.x;
this.y = -t1.y;
this.z = -t1.z;
this.w = -t1.w;
}
/**
* Negates the value of this tuple in place.
*/
public final void negate()
{
this.x = -this.x;
this.y = -this.y;
this.z = -this.z;
this.w = -this.w;
}
/**
* 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(float s, Tuple4f t1)
{
this.x = s*t1.x;
this.y = s*t1.y;
this.z = s*t1.z;
this.w = s*t1.w;
}
/**
* Sets the value of this tuple to the scalar multiplication
* of the scale factor with this.
* @param s the scalar value
*/
public final void scale(float s)
{
this.x *= s;
this.y *= s;
this.z *= s;
this.w *= s;
}
/**
* Sets the value of this tuple to the scalar multiplication
* of tuple t1 plus 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(float s, Tuple4f t1, Tuple4f t2)
{
this.x = s*t1.x + t2.x;
this.y = s*t1.y + t2.y;
this.z = s*t1.z + t2.z;
this.w = s*t1.w + t2.w;
}
/**
* 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(float s, Tuple4f t1)
{
this.x = s*this.x + t1.x;
this.y = s*this.y + t1.y;
this.z = s*this.z + t1.z;
this.w = s*this.w + t1.w;
}
/**
* Returns a string that contains the values of this Tuple4f.
* The form is (x,y,z,w).
* @return the String representation
*/
public String toString() {
return "(" + this.x + ", " + this.y + ", " + this.z + ", " + this.w + ")";
}
/**
* Returns true if all of the data members of Tuple4f t1 are
* equal to the corresponding data members in this Tuple4f.
* @param t1 the vector with which the comparison is made
* @return true or false
*/
public boolean equals(Tuple4f t1)
{
try {
return(this.x == t1.x && this.y == t1.y && this.z == t1.z
&& this.w == t1.w);
}
catch (NullPointerException e2) {return false;}
}
/**
* Returns true if the Object t1 is of type Tuple4f and all of the
* data members of t1 are equal to the corresponding data members in
* this Tuple4f.
* @param t1 the object with which the comparison is made
* @return true or false
*/
public boolean equals(Object t1)
{
try {
Tuple4f t2 = (Tuple4f) t1;
return(this.x == t2.x && this.y == t2.y &&
this.z == t2.z && this.w == t2.w);
}
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), abs(z1-z2), abs(w1-w2)].
* @param t1 the tuple to be compared to this tuple
* @param epsilon the threshold value
* @return true or false
*/
public boolean epsilonEquals(Tuple4f t1, float epsilon)
{
float diff;
diff = x - t1.x;
if(Float.isNaN(diff)) return false;
if((diff<0?-diff:diff) > epsilon) return false;
diff = y - t1.y;
if(Float.isNaN(diff)) return false;
if((diff<0?-diff:diff) > epsilon) return false;
diff = z - t1.z;
if(Float.isNaN(diff)) return false;
if((diff<0?-diff:diff) > epsilon) return false;
diff = w - t1.w;
if(Float.isNaN(diff)) return false;
if((diff<0?-diff:diff) > epsilon) return false;
return true;
}
/**
* Returns a hash code value based on the data values in this
* object. Two different Tuple4f objects with identical data values
* (i.e., Tuple4f.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
*/
public int hashCode() {
long bits = 1L;
bits = 31L * bits + (long)VecMathUtil.floatToIntBits(x);
bits = 31L * bits + (long)VecMathUtil.floatToIntBits(y);
bits = 31L * bits + (long)VecMathUtil.floatToIntBits(z);
bits = 31L * bits + (long)VecMathUtil.floatToIntBits(w);
return (int) (bits ^ (bits >> 32));
}
/**
* 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(float min, float max, Tuple4f 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;
}
if( t.z > max ) {
z = max;
} else if( t.z < min ){
z = min;
} else {
z = t.z;
}
if( t.w > max ) {
w = max;
} else if( t.w < min ){
w = min;
} else {
w = t.w;
}
}
/**
* 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(float min, Tuple4f t)
{
if( t.x < min ) {
x = min;
} else {
x = t.x;
}
if( t.y < min ) {
y = min;
} else {
y = t.y;
}
if( t.z < min ) {
z = min;
} else {
z = t.z;
}
if( t.w < min ) {
w = min;
} else {
w = t.w;
}
}
/**
* 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(float max, Tuple4f t)
{
if( t.x > max ) {
x = max;
} else {
x = t.x;
}
if( t.y > max ) {
y = max;
} else {
y = t.y;
}
if( t.z > max ) {
z = max;
} else {
z = t.z;
}
if( t.w > max ) {
w = max;
} else {
w = t.z;
}
}
/**
* 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(Tuple4f t)
{
x = Math.abs(t.x);
y = Math.abs(t.y);
z = Math.abs(t.z);
w = Math.abs(t.w);
}
/**
* 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(float min, float max)
{
if( x > max ) {
x = max;
} else if( x < min ){
x = min;
}
if( y > max ) {
y = max;
} else if( y < min ){
y = min;
}
if( z > max ) {
z = max;
} else if( z < min ){
z = min;
}
if( w > max ) {
w = max;
} else if( w < min ){
w = 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(float min)
{
if( x < min ) x=min;
if( y < min ) y=min;
if( z < min ) z=min;
if( w < min ) w=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(float max)
{
if( x > max ) x=max;
if( y > max ) y=max;
if( z > max ) z=max;
if( w > max ) w=max;
}
/**
* Sets each component of this tuple to its absolute value.
*/
public final void absolute()
{
x = Math.abs(x);
y = Math.abs(y);
z = Math.abs(z);
w = Math.abs(w);
}
/**
* 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 void interpolate(Tuple4f t1, Tuple4f t2, float alpha)
{
this.x = (1-alpha)*t1.x + alpha*t2.x;
this.y = (1-alpha)*t1.y + alpha*t2.y;
this.z = (1-alpha)*t1.z + alpha*t2.z;
this.w = (1-alpha)*t1.w + alpha*t2.w;
}
/**
* 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 void interpolate(Tuple4f t1, float alpha)
{
this.x = (1-alpha)*this.x + alpha*t1.x;
this.y = (1-alpha)*this.y + alpha*t1.y;
this.z = (1-alpha)*this.z + alpha*t1.z;
this.w = (1-alpha)*this.w + alpha*t1.w;
}
/**
* 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
*/
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 x coordinate.
*
* @return the x coordinate.
*
* @since vecmath 1.5
*/
public final float getX() {
return x;
}
/**
* Set the x coordinate.
*
* @param x value to x coordinate.
*
* @since vecmath 1.5
*/
public final void setX(float x) {
this.x = x;
}
/**
* Get the y coordinate.
*
* @return the y coordinate.
*
* @since vecmath 1.5
*/
public final float getY() {
return y;
}
/**
* Set the y coordinate.
*
* @param y value to y coordinate.
*
* @since vecmath 1.5
*/
public final void setY(float y) {
this.y = y;
}
/**
* Get the z coordinate.
*
* @return the z coordinate.
*
* @since vecmath 1.5
*/
public final float getZ() {
return z;
}
/**
* Set the z coordinate.
*
* @param z value to z coordinate.
*
* @since vecmath 1.5
*/
public final void setZ(float z) {
this.z = z;
}
/**
* Get the w coordinate.
*
* @return the w coordinate.
*
* @since vecmath 1.5
*/
public final float getW() {
return w;
}
/**
* Set the w coordinate.
*
* @param w value to w coordinate.
*
* @since vecmath 1.5
*/
public final void setW(float w) {
this.w = w;
}
}