1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
* 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.
*
*/
package javax.vecmath;
/**
* A 4-element vector represented by double-precision floating point
* x,y,z,w coordinates.
*
*/
public class Vector4d extends Tuple4d implements java.io.Serializable {
// Compatible with 1.1
static final long serialVersionUID = 3938123424117448700L;
/**
* Constructs and initializes a Vector4d 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 Vector4d(double x, double y, double z, double w)
{
super(x,y,z,w);
}
/**
* Constructs and initializes a Vector4d from the coordinates contained
* in the array.
* @param v the array of length 4 containing xyzw in order
*/
public Vector4d(double[] v)
{
super(v);
}
/**
* Constructs and initializes a Vector4d from the specified Vector4d.
* @param v1 the Vector4d containing the initialization x y z w data
*/
public Vector4d(Vector4d v1)
{
super(v1);
}
/**
* Constructs and initializes a Vector4d from the specified Vector4f.
* @param v1 the Vector4f containing the initialization x y z w data
*/
public Vector4d(Vector4f v1)
{
super(v1);
}
/**
* Constructs and initializes a Vector4d from the specified Tuple4f.
* @param t1 the Tuple4f containing the initialization x y z w data
*/
public Vector4d(Tuple4f t1)
{
super(t1);
}
/**
* Constructs and initializes a Vector4d from the specified Tuple4d.
* @param t1 the Tuple4d containing the initialization x y z w data
*/
public Vector4d(Tuple4d t1)
{
super(t1);
}
/**
* Constructs and initializes a Vector4d from the specified Tuple3d.
* The x,y,z components of this vector are set to the corresponding
* components of tuple t1. The w component of this vector
* is set to 0.
* @param t1 the tuple to be copied
*
* @since vecmath 1.2
*/
public Vector4d(Tuple3d t1) {
super(t1.x, t1.y, t1.z, 0.0);
}
/**
* Constructs and initializes a Vector4d to (0,0,0,0).
*/
public Vector4d()
{
super();
}
/**
* Sets the x,y,z components of this vector to the corresponding
* components of tuple t1. The w component of this vector
* is set to 0.
* @param t1 the tuple to be copied
*
* @since vecmath 1.2
*/
public final void set(Tuple3d t1) {
this.x = t1.x;
this.y = t1.y;
this.z = t1.z;
this.w = 0.0;
}
/**
* Returns the length of this vector.
* @return the length of this vector
*/
public final double length()
{
return Math.sqrt(this.x*this.x + this.y*this.y +
this.z*this.z + this.w*this.w);
}
/**
* Returns the squared length of this vector.
* @return the squared length of this vector
*/
public final double lengthSquared()
{
return (this.x*this.x + this.y*this.y +
this.z*this.z + this.w*this.w);
}
/**
* Returns the dot product of this vector and vector v1.
* @param v1 the other vector
* @return the dot product of this vector and vector v1
*/
public final double dot(Vector4d v1)
{
return (this.x*v1.x + this.y*v1.y + this.z*v1.z + this.w*v1.w);
}
/**
* Sets the value of this vector to the normalization of vector v1.
* @param v1 the un-normalized vector
*/
public final void normalize(Vector4d v1)
{
double norm;
norm = 1.0/Math.sqrt(v1.x*v1.x + v1.y*v1.y + v1.z*v1.z + v1.w*v1.w);
this.x = v1.x*norm;
this.y = v1.y*norm;
this.z = v1.z*norm;
this.w = v1.w*norm;
}
/**
* Normalizes this vector in place.
*/
public final void normalize()
{
double norm;
norm = 1.0/Math.sqrt(this.x*this.x + this.y*this.y +
this.z*this.z + this.w*this.w);
this.x *= norm;
this.y *= norm;
this.z *= norm;
this.w *= norm;
}
/**
* Returns the (4-space) angle in radians between this vector and
* the vector parameter; the return value is constrained to the
* range [0,PI].
* @param v1 the other vector
* @return the angle in radians in the range [0,PI]
*/
public final double angle(Vector4d v1)
{
double vDot = this.dot(v1) / ( this.length()*v1.length() );
if( vDot < -1.0) vDot = -1.0;
if( vDot > 1.0) vDot = 1.0;
return((double) (Math.acos( vDot )));
}
}
|
