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
|
/*
* Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution 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 Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
*/
package net.java.joglutils.msg.math;
/** 2-element single-precision vector */
public class Vec2f {
private float x;
private float y;
public Vec2f() {}
public Vec2f(Vec2f arg) {
this(arg.x, arg.y);
}
public Vec2f(float x, float y) {
set(x, y);
}
public Vec2f copy() {
return new Vec2f(this);
}
public void set(Vec2f arg) {
set(arg.x, arg.y);
}
public void set(float x, float y) {
this.x = x;
this.y = y;
}
/** Sets the ith component, 0 <= i < 2 */
public void set(int i, float val) {
switch (i) {
case 0: x = val; break;
case 1: y = val; break;
default: throw new IndexOutOfBoundsException();
}
}
/** Gets the ith component, 0 <= i < 2 */
public float get(int i) {
switch (i) {
case 0: return x;
case 1: return y;
default: throw new IndexOutOfBoundsException();
}
}
public float x() { return x; }
public float y() { return y; }
public void setX(float x) { this.x = x; }
public void setY(float y) { this.y = y; }
public float dot(Vec2f arg) {
return x * arg.x + y * arg.y;
}
public float length() {
return (float) Math.sqrt(lengthSquared());
}
public float lengthSquared() {
return this.dot(this);
}
public void normalize() {
float len = length();
if (len == 0.0f) return;
scale(1.0f / len);
}
/** Returns this * val; creates new vector */
public Vec2f times(float val) {
Vec2f tmp = new Vec2f(this);
tmp.scale(val);
return tmp;
}
/** this = this * val */
public void scale(float val) {
x *= val;
y *= val;
}
/** Returns this + arg; creates new vector */
public Vec2f plus(Vec2f arg) {
Vec2f tmp = new Vec2f();
tmp.add(this, arg);
return tmp;
}
/** this = this + b */
public void add(Vec2f b) {
add(this, b);
}
/** this = a + b */
public void add(Vec2f a, Vec2f b) {
x = a.x + b.x;
y = a.y + b.y;
}
/** Returns this + s * arg; creates new vector */
public Vec2f addScaled(float s, Vec2f arg) {
Vec2f tmp = new Vec2f();
tmp.addScaled(this, s, arg);
return tmp;
}
/** this = a + s * b */
public void addScaled(Vec2f a, float s, Vec2f b) {
x = a.x + s * b.x;
y = a.y + s * b.y;
}
/** Returns this - arg; creates new vector */
public Vec2f minus(Vec2f arg) {
Vec2f tmp = new Vec2f();
tmp.sub(this, arg);
return tmp;
}
/** this = this - b */
public void sub(Vec2f b) {
sub(this, b);
}
/** this = a - b */
public void sub(Vec2f a, Vec2f b) {
x = a.x - b.x;
y = a.y - b.y;
}
public Vecf toVecf() {
Vecf out = new Vecf(2);
for (int i = 0; i < 2; i++) {
out.set(i, get(i));
}
return out;
}
public String toString() {
return "(" + x + ", " + y + ")";
}
}
|
