forked from Kitware/vtk-js
-
Notifications
You must be signed in to change notification settings - Fork 0
/
index.js
147 lines (112 loc) · 4.57 KB
/
index.js
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
import macro from 'vtk.js/Sources/macros';
import vtkCompositeCameraManipulator from 'vtk.js/Sources/Interaction/Manipulators/CompositeCameraManipulator';
import vtkCompositeGestureManipulator from 'vtk.js/Sources/Interaction/Manipulators/CompositeGestureManipulator';
import vtkInteractorStyleManipulator from 'vtk.js/Sources/Interaction/Style/InteractorStyleManipulator';
// ----------------------------------------------------------------------------
// vtkGestureCameraManipulator methods
// ----------------------------------------------------------------------------
function vtkGestureCameraManipulator(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkGestureCameraManipulator');
//--------------------------------------------------------------------------
publicAPI.onStartPinch = (interactor, scale) => {
model.previousScale = scale;
};
//---------------------------------------------------------------------------
publicAPI.onStartRotate = (interactor, rotation) => {
model.previousRotation = rotation;
};
//---------------------------------------------------------------------------
publicAPI.onStartPan = (interactor, translation) => {
model.previousTranslation = translation;
};
//---------------------------------------------------------------------------
publicAPI.onPinch = (interactor, renderer, scale) => {
vtkInteractorStyleManipulator.dollyByFactor(
interactor,
renderer,
scale / model.previousScale
);
model.previousScale = scale;
};
//---------------------------------------------------------------------------
publicAPI.onPan = (interactor, renderer, translation) => {
const camera = renderer.getActiveCamera();
const style = interactor.getInteractorStyle();
// Calculate the focal depth since we'll be using it a lot
let viewFocus = camera.getFocalPoint();
viewFocus = style.computeWorldToDisplay(
renderer,
viewFocus[0],
viewFocus[1],
viewFocus[2]
);
const focalDepth = viewFocus[2];
const trans = translation;
const lastTrans = model.previousTranslation;
const newPickPoint = style.computeDisplayToWorld(
renderer,
viewFocus[0] + trans[0] - lastTrans[0],
viewFocus[1] + trans[1] - lastTrans[1],
focalDepth
);
// Has to recalc old mouse point since the viewport has moved,
// so can't move it outside the loop
const oldPickPoint = style.computeDisplayToWorld(
renderer,
viewFocus[0],
viewFocus[1],
focalDepth
);
// Camera motion is reversed
const motionVector = [];
motionVector[0] = oldPickPoint[0] - newPickPoint[0];
motionVector[1] = oldPickPoint[1] - newPickPoint[1];
motionVector[2] = oldPickPoint[2] - newPickPoint[2];
viewFocus = camera.getFocalPoint();
const viewPoint = camera.getPosition();
camera.setFocalPoint(
motionVector[0] + viewFocus[0],
motionVector[1] + viewFocus[1],
motionVector[2] + viewFocus[2]
);
camera.setPosition(
motionVector[0] + viewPoint[0],
motionVector[1] + viewPoint[1],
motionVector[2] + viewPoint[2]
);
if (interactor.getLightFollowCamera()) {
renderer.updateLightsGeometryToFollowCamera();
}
camera.orthogonalizeViewUp();
model.previousTranslation = translation;
};
//---------------------------------------------------------------------------
publicAPI.onRotate = (interactor, renderer, rotation) => {
const camera = renderer.getActiveCamera();
camera.roll(rotation - model.previousRotation);
camera.orthogonalizeViewUp();
model.previousRotation = rotation;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inheritance
macro.obj(publicAPI, model);
vtkCompositeGestureManipulator.extend(publicAPI, model, initialValues);
vtkCompositeCameraManipulator.extend(publicAPI, model, initialValues);
// Object specific methods
vtkGestureCameraManipulator(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkGestureCameraManipulator'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };