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
|
/**
* @author HypnosNova / https://www.threejs.org.cn/gallery
* This is a class to check whether objects are in a selection area in 3D space
*/
import {
Frustum,
Vector3
} from "../../../build/three.module.js";
var SelectionBox = ( function () {
var frustum = new Frustum();
var center = new Vector3();
var tmpPoint = new Vector3();
var vecNear = new Vector3();
var vecTopLeft = new Vector3();
var vecTopRight = new Vector3();
var vecDownRight = new Vector3();
var vecDownLeft = new Vector3();
var vectemp1 = new Vector3();
var vectemp2 = new Vector3();
var vectemp3 = new Vector3();
function SelectionBox( camera, scene, deep ) {
this.camera = camera;
this.scene = scene;
this.startPoint = new Vector3();
this.endPoint = new Vector3();
this.collection = [];
this.deep = deep || Number.MAX_VALUE;
}
SelectionBox.prototype.select = function ( startPoint, endPoint ) {
this.startPoint = startPoint || this.startPoint;
this.endPoint = endPoint || this.endPoint;
this.collection = [];
this.updateFrustum( this.startPoint, this.endPoint );
this.searchChildInFrustum( frustum, this.scene );
return this.collection;
};
SelectionBox.prototype.updateFrustum = function ( startPoint, endPoint ) {
startPoint = startPoint || this.startPoint;
endPoint = endPoint || this.endPoint;
this.camera.updateProjectionMatrix();
this.camera.updateMatrixWorld();
tmpPoint.copy( startPoint );
tmpPoint.x = Math.min( startPoint.x, endPoint.x );
tmpPoint.y = Math.max( startPoint.y, endPoint.y );
endPoint.x = Math.max( startPoint.x, endPoint.x );
endPoint.y = Math.min( startPoint.y, endPoint.y );
vecNear.copy( this.camera.position );
vecTopLeft.copy( tmpPoint );
vecTopRight.set( endPoint.x, tmpPoint.y, 0 );
vecDownRight.copy( endPoint );
vecDownLeft.set( tmpPoint.x, endPoint.y, 0 );
vecTopLeft.unproject( this.camera );
vecTopRight.unproject( this.camera );
vecDownRight.unproject( this.camera );
vecDownLeft.unproject( this.camera );
vectemp1.copy( vecTopLeft ).sub( vecNear );
vectemp2.copy( vecTopRight ).sub( vecNear );
vectemp3.copy( vecDownRight ).sub( vecNear );
vectemp1.normalize();
vectemp2.normalize();
vectemp3.normalize();
vectemp1.multiplyScalar( this.deep );
vectemp2.multiplyScalar( this.deep );
vectemp3.multiplyScalar( this.deep );
vectemp1.add( vecNear );
vectemp2.add( vecNear );
vectemp3.add( vecNear );
var planes = frustum.planes;
planes[ 0 ].setFromCoplanarPoints( vecNear, vecTopLeft, vecTopRight );
planes[ 1 ].setFromCoplanarPoints( vecNear, vecTopRight, vecDownRight );
planes[ 2 ].setFromCoplanarPoints( vecDownRight, vecDownLeft, vecNear );
planes[ 3 ].setFromCoplanarPoints( vecDownLeft, vecTopLeft, vecNear );
planes[ 4 ].setFromCoplanarPoints( vecTopRight, vecDownRight, vecDownLeft );
planes[ 5 ].setFromCoplanarPoints( vectemp3, vectemp2, vectemp1 );
planes[ 5 ].normal.multiplyScalar( - 1 );
};
SelectionBox.prototype.searchChildInFrustum = function ( frustum, object ) {
if ( object.isMesh ) {
if ( object.material !== undefined ) {
object.geometry.computeBoundingSphere();
center.copy( object.geometry.boundingSphere.center );
center.applyMatrix4( object.matrixWorld );
if ( frustum.containsPoint( center ) ) {
this.collection.push( object );
}
}
}
if ( object.children.length > 0 ) {
for ( var x = 0; x < object.children.length; x ++ ) {
this.searchChildInFrustum( frustum, object.children[ x ] );
}
}
};
return SelectionBox;
} )();
export { SelectionBox };
|
