MouseCameraTrackballMultiRotateManipulator

Source

index.js
import macro from 'vtk.js/Sources/macro';
import vtkCompositeCameraManipulator from 'vtk.js/Sources/Interaction/Manipulators/CompositeCameraManipulator';
import vtkCompositeMouseManipulator from 'vtk.js/Sources/Interaction/Manipulators/CompositeMouseManipulator';
import vtkMouseCameraTrackballRotateManipulator from 'vtk.js/Sources/Interaction/Manipulators/MouseCameraTrackballRotateManipulator';
import vtkMouseCameraTrackballRollManipulator from 'vtk.js/Sources/Interaction/Manipulators/MouseCameraTrackballRollManipulator';

function max(x, y) {
return x < y ? y : x;
}

function sqr(x) {
return x * x;
}

// ----------------------------------------------------------------------------
// vtkMouseCameraTrackballMultiRotateManipulator methods
// ----------------------------------------------------------------------------

function vtkMouseCameraTrackballMultiRotateManipulator(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkMouseCameraTrackballMultiRotateManipulator');

const rotateManipulator = vtkMouseCameraTrackballRotateManipulator.newInstance();
const rollManipulator = vtkMouseCameraTrackballRollManipulator.newInstance();
let currentManipulator = null;

publicAPI.onButtonDown = (interactor, renderer, position) => {
const viewSize = interactor.getView().getSize();
const viewCenter = [0.5 * viewSize[0], 0.5 * viewSize[1]];
const rotateRadius = 0.9 * max(viewCenter[0], viewCenter[1]);
const dist2 =
sqr(viewCenter[0] - position.x) + sqr(viewCenter[1] - position.y);

if (rotateRadius * rotateRadius > dist2) {
currentManipulator = rotateManipulator;
} else {
currentManipulator = rollManipulator;
}

currentManipulator.setButton(publicAPI.getButton());
currentManipulator.setShift(publicAPI.getShift());
currentManipulator.setControl(publicAPI.getControl());
currentManipulator.setCenter(publicAPI.getCenter());

currentManipulator.onButtonDown(interactor, position);
};

publicAPI.onButtonUp = (interactor) => {
if (currentManipulator) {
currentManipulator.onButtonUp(interactor);
}
};

publicAPI.onMouseMove = (interactor, renderer, position) => {
if (currentManipulator) {
currentManipulator.onMouseMove(interactor, renderer, position);
}
};
}

// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------

const DEFAULT_VALUES = {};

// ----------------------------------------------------------------------------

export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);

// Inheritance
macro.obj(publicAPI, model);
vtkCompositeMouseManipulator.extend(publicAPI, model, initialValues);
vtkCompositeCameraManipulator.extend(publicAPI, model, initialValues);

// Object specific methods
vtkMouseCameraTrackballMultiRotateManipulator(publicAPI, model);
}

// ----------------------------------------------------------------------------

export const newInstance = macro.newInstance(
extend,
'vtkMouseCameraTrackballMultiRotateManipulator'
);

// ----------------------------------------------------------------------------

export default { newInstance, extend };