objecttransform.js
4.74 KB
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
import ARCS from '../build/arcs.js';
import * as THREE from '../deps/three.js/index.js';
var ObjectTransform ;
/**
* @class ObjectTransform
* @classdesc Apply transformations to objects
*/
ObjectTransform = ARCS.Component.create(
function() {
var objRoot;
var refMat;
var id = -1;
/**
* Sets the object of interest on which we would like to apply transforms.
* @param obj {object} a Three.js Object3D
* @function ObjectTransform#setObject
*/
this.setObject = function (obj) {
objRoot = new THREE.Object3D();
obj.parent.add(objRoot);
obj.parent.remove(obj);
objRoot.add(obj);
var box = new THREE.Box3;
box.setFromObject(obj);
var s = box.size();
var scale = MAX3(s.x, s.y, s.z);
console.log(scale);
obj.add(new THREE.AxisHelper(scale / 2));
};
var MAX3 = function (a,b,c) {
if ( a >= b ) {
if ( a >= c) {
return a;
} else {
return c;
}
} else {
if (b >= c) {
return b;
} else {
return c;
}
}
};
// right now, we make something compatible with aruco markers
// it may evolve in the future
/**
* Takes an array of markers and then applies transformations
* to the referenced object.
* @function ObjectTransform#setTransform
* @param arr {Marker[]} an array of detected markers.
*/
this.setTransform = function ( arr ) {
/*2 set here the transformation we should apply on objRoot
* Each marker has 3 major properties :
* - id is the marker id;
* - pose.rotation gives its orientation using a rotation matrix
* and is a 3x3 array
* - pose.position gives its position with respect to the camera
* and is a vector with 3 components.
*/
if (objRoot === undefined) { return ; }
var i ;
for ( i = 0; i < arr.length; i++) {
if ( arr[i].id === id ) {
// insert your code here.
//<--
var rotation = arr[i].pose.rotation;
var translation = arr[i].pose.position;
/*var matrix = new THREE.Matrix4(
rotation[0][0], rotation[0][1], rotation[0][2], translation[0],
rotation[1][0], rotation[1][1], rotation[1][2], translation[1],
rotation[2][0], rotation[2][1], rotation[2][2], translation[2],
0 , 0, 0, 1);
var r = new THREE.Euler();
r.setFromRotationMatrix(matrix);
objRoot.rotation.x = r.x;
objRoot.rotation.y = r.y;
objRoot.rotation.z = r.z;
objRoot.position.x = translation[0];
objRoot.position.y = translation[1];
objRoot.position.z = translation[2];
objRoot.scale.x = 1;
objRoot.scale.y = 1;
objRoot.scale.z = 1;*/
objRoot.rotation.x = -Math.asin(-rotation[1][2]);
objRoot.rotation.y = -Math.atan2(rotation[0][2], rotation[2][2]);
objRoot.rotation.z = Math.atan2(rotation[1][0], rotation[1][1]);
objRoot.position.x = translation[0];
objRoot.position.y = translation[1];
objRoot.position.z = -translation[2];
//-->
}
}
};
this.setId = function (i) {
id = i;
};
},
['setObject', 'setTransform', 'setId'],
[]
);
export default { ObjectTransform : ObjectTransform };
/*
ARCS.__lib__`
{
"components": {
"ObjectTransform": {
"description": "Apply transformations to objects",
"keywords": [
"object",
"transform",
"transformation"
]
}
},
"dependencies": ["three"],
"recipes": [
{
"from": "node_modules/three/build/three.module.js",
"to": "deps/three.js/index.js"
}
]
}
`;
*/