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
|
package demos.xtrans;
import gleem.linalg.*;
/** A quadrilateral in which the vertices are two-dimensional
floating-point values. */
public class Quad2f {
private Vec2f[] vecs;
public static final int UPPER_LEFT = 0;
public static final int LOWER_LEFT = 1;
public static final int LOWER_RIGHT = 2;
public static final int UPPER_RIGHT = 2;
private static final int NUM_VECS = 4;
/** Constructs a Quad2f in which all the vertices are set to the
origin. */
public Quad2f() {
vecs = new Vec2f[NUM_VECS];
for (int i = 0; i < NUM_VECS; i++) {
vecs[i] = new Vec2f();
}
}
/** Constructs a Quad2f in which the vertices are set to the
specified values. */
public Quad2f(Vec2f upperLeft,
Vec2f lowerLeft,
Vec2f lowerRight,
Vec2f upperRight) {
this();
setVec(0, upperLeft);
setVec(1, lowerLeft);
setVec(2, lowerRight);
setVec(3, upperRight);
}
/** Sets the specified vertex to the specified value. */
public void setVec(int which, Vec2f val) {
vecs[which].set(val);
}
/** Returns the specified vertex. */
public Vec2f getVec(int which) {
return vecs[which];
}
/** Sets all four points of this quadrilateral. */
public void set(Quad2f quad) {
for (int i = 0; i < NUM_VECS; i++) {
setVec(i, quad.getVec(i));
}
}
/** Returns a newly-constructed Quad2f in which all vertices have
been multiplied in scalar fashion by the passed value. */
public Quad2f times(float val) {
return new Quad2f(getVec(0).times(val),
getVec(1).times(val),
getVec(2).times(val),
getVec(3).times(val));
}
/** Returns a newly-constructed Quad2f in which the vertices are the
component-wise sums of this quad and the passed quad. */
public Quad2f plus(Quad2f val) {
return new Quad2f(getVec(0).plus(val.getVec(0)),
getVec(1).plus(val.getVec(1)),
getVec(2).plus(val.getVec(2)),
getVec(3).plus(val.getVec(3)));
}
}
|
