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
|
/*
* Copyright 1999-2008 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.media.j3d;
import javax.vecmath.Point3d;
import javax.vecmath.Point4d;
import javax.vecmath.Vector3d;
/**
* PickCone is the abstract base class of all cone pick shapes.
*
* @since Java 3D 1.2
*/
public abstract class PickCone extends PickShape {
Point3d origin;
Vector3d direction;
double spreadAngle;
/**
* Constructs an empty PickCone.
* The origin and direction of the cone are
* initialized to (0,0,0). The spread angle is initialized
* to <code>PI/64</code>.
*/
public PickCone() {
this.origin = new Point3d();
this.direction = new Vector3d();
this.spreadAngle = Math.PI / 64.0;
}
/**
* Gets the origin of this PickCone.
* @param origin the Point3d object into which the origin will be copied.
*/
public void getOrigin(Point3d origin) {
origin.set(this.origin);
}
/**
* Gets the direction of this PickCone.
* @param direction the Vector3d object into which the direction
* will be copied.
*/
public void getDirection(Vector3d direction) {
direction.set(this.direction);
}
/**
* Gets the spread angle of this PickCone.
* @return the spread angle.
*/
public double getSpreadAngle() {
return spreadAngle;
}
/**
* Gets the radius of this PickCone at the specified distance.
* @param distance the distance from the origin at which we want
* the radius of the cone
* @return the radius at the specified distance
*/
double getRadius(double distance) {
return distance * Math.tan (spreadAngle);
}
/**
* Return true if shape intersect with bounds.
* The point of intersection is stored in pickPos.
*/
@Override
abstract boolean intersect(Bounds bounds, Point4d pickPos);
@Override
Point3d getStartPoint() {
return origin;
}
@Override
int getPickType() {
return PICKCONE;
}
}
|
