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130x 130x 1x 1x 1x 1x 130x 130x 130x 130x 130x 299x 291x 291x 291x 299x 130x 130x 130x 448x 130x 130x 130x 130x 130x 1x 1x 1x 1x 1x 1x 130x 130x 130x 130x 130x 130x 130x 129x 129x 129x 129x 130x 34x 130x 23x 23x 23x 23x 23x 23x 23x 23x 23x 26x 26x 23x 23x 3x 3x 1x 23x 23x 23x 23x 130x 299x 299x 130x 5070x 5070x 34x 34x 34x 34x 34x 130x 130x 130x 130x 7x 7x 7x 7x 7x 130x 9x 9x 9x 9x 7x 9x 130x 130x 1x 130x 130x 130x 130x 130x 5070x 130x 130x 130x 130x 1x | import macro from 'vtk.js/Sources/macros';
import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import Constants from 'vtk.js/Sources/Rendering/Core/RenderWindowInteractor/Constants';
const { Device, Input } = Constants;
const { vtkWarningMacro, vtkErrorMacro, normalizeWheel, vtkOnceErrorMacro } =
macro;
// ----------------------------------------------------------------------------
// Global methods
// ----------------------------------------------------------------------------
const EMPTY_MOUSE_EVENT = {
ctrlKey: false,
altKey: false,
shiftKey: false,
};
const deviceInputMap = {
'xr-standard': [
Input.Trigger,
Input.Grip,
Input.TrackPad,
Input.Thumbstick,
Input.A,
Input.B,
],
};
const handledEvents = [
'StartAnimation',
'Animation',
'EndAnimation',
'PointerEnter',
'PointerLeave',
'MouseEnter',
'MouseLeave',
'StartMouseMove',
'MouseMove',
'EndMouseMove',
'LeftButtonPress',
'LeftButtonRelease',
'MiddleButtonPress',
'MiddleButtonRelease',
'RightButtonPress',
'RightButtonRelease',
'KeyPress',
'KeyDown',
'KeyUp',
'StartMouseWheel',
'MouseWheel',
'EndMouseWheel',
'StartPinch',
'Pinch',
'EndPinch',
'StartPan',
'Pan',
'EndPan',
'StartRotate',
'Rotate',
'EndRotate',
'Button3D',
'Move3D',
'StartPointerLock',
'EndPointerLock',
'StartInteraction',
'Interaction',
'EndInteraction',
'AnimationFrameRateUpdate',
];
function preventDefault(event) {
if (event.cancelable) {
event.preventDefault();
}
}
function pointerCacheToPositions(cache) {
const positions = Object.create(null);
cache.forEach(({ pointerId, position }) => {
positions[pointerId] = position;
});
return positions;
}
// ----------------------------------------------------------------------------
// vtkRenderWindowInteractor methods
// ----------------------------------------------------------------------------
function vtkRenderWindowInteractor(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkRenderWindowInteractor');
// Capture "parentClass" api for internal use
const superClass = { ...publicAPI };
// Initialize list of requesters
const animationRequesters = new Set();
// map from pointerId to { pointerId: number, position: [x, y] }
const pointerCache = new Map();
// Factor to apply on wheel spin.
let wheelCoefficient = 1;
// Public API methods
//----------------------------------------------------------------------
publicAPI.start = () => {
// Let the compositing handle the event loop if it wants to.
// if (publicAPI.HasObserver(vtkCommand::StartEvent) && !publicAPI.HandleEventLoop) {
// publicAPI.invokeEvent({ type: 'StartEvent' });
// return;
// }
// As a convenience, initialize if we aren't initialized yet.
if (!model.initialized) {
publicAPI.initialize();
if (!model.initialized) {
return;
}
}
// Pass execution to the subclass which will run the event loop,
// this will not return until TerminateApp is called.
publicAPI.startEventLoop();
};
//----------------------------------------------------------------------
publicAPI.setRenderWindow = (aren) => {
vtkErrorMacro(
'you want to call setView(view) instead of setRenderWindow on a vtk.js interactor'
);
};
//----------------------------------------------------------------------
publicAPI.setInteractorStyle = (style) => {
if (model.interactorStyle !== style) {
if (model.interactorStyle != null) {
model.interactorStyle.setInteractor(null);
}
model.interactorStyle = style;
if (model.interactorStyle != null) {
if (model.interactorStyle.getInteractor() !== publicAPI) {
model.interactorStyle.setInteractor(publicAPI);
}
}
}
};
//---------------------------------------------------------------------
publicAPI.initialize = () => {
model.initialized = true;
publicAPI.enable();
publicAPI.render();
};
publicAPI.enable = () => publicAPI.setEnabled(true);
publicAPI.disable = () => publicAPI.setEnabled(false);
publicAPI.startEventLoop = () => vtkWarningMacro('empty event loop');
function updateCurrentRenderer(x, y) {
if (!model._forcedRenderer) {
model.currentRenderer = publicAPI.findPokedRenderer(x, y);
}
}
publicAPI.getCurrentRenderer = () => {
if (model.currentRenderer) {
return model.currentRenderer;
}
updateCurrentRenderer(0, 0);
return model.currentRenderer;
};
function _getScreenEventPositionFor(source) {
const canvas = model._view.getCanvas();
const bounds = canvas.getBoundingClientRect();
const scaleX = canvas.width / bounds.width;
const scaleY = canvas.height / bounds.height;
const position = {
x: scaleX * (source.clientX - bounds.left),
y: scaleY * (bounds.height - source.clientY + bounds.top),
z: 0,
};
// if multitouch, do not update the current renderer
if (pointerCache.size <= 1 || !model.currentRenderer) {
updateCurrentRenderer(position.x, position.y);
}
return position;
}
// Allow user to override it
const getScreenEventPositionFor =
model._getScreenEventPositionFor || _getScreenEventPositionFor;
function getModifierKeysFor(event) {
return {
controlKey: event.ctrlKey,
altKey: event.altKey,
shiftKey: event.shiftKey,
};
}
function getKeysFor(event) {
const modifierKeys = getModifierKeysFor(event);
const keys = {
key: event.key,
keyCode: event.charCode,
...modifierKeys,
};
return keys;
}
function getDeviceTypeFor(event) {
return event.pointerType || '';
}
const _bindEvents = () => {
if (model.container === null) {
return;
}
const { container } = model;
container.addEventListener('contextmenu', preventDefault);
container.addEventListener('wheel', publicAPI.handleWheel);
container.addEventListener('DOMMouseScroll', publicAPI.handleWheel);
container.addEventListener('pointerenter', publicAPI.handlePointerEnter);
container.addEventListener('pointerleave', publicAPI.handlePointerLeave);
container.addEventListener('pointermove', publicAPI.handlePointerMove, {
passive: false,
});
container.addEventListener('pointerdown', publicAPI.handlePointerDown, {
passive: false,
});
container.addEventListener('pointerup', publicAPI.handlePointerUp);
container.addEventListener('pointercancel', publicAPI.handlePointerCancel);
document.addEventListener('keypress', publicAPI.handleKeyPress);
document.addEventListener('keydown', publicAPI.handleKeyDown);
document.addEventListener('keyup', publicAPI.handleKeyUp);
document.addEventListener(
'pointerlockchange',
publicAPI.handlePointerLockChange
);
// using touchAction is more performant than preventDefault
// in a touchstart handler.
container.style.touchAction = 'none';
container.style.userSelect = 'none';
// disables tap highlight for when cursor is pointer
container.style.webkitTapHighlightColor = 'rgba(0,0,0,0)';
};
// For backward compatibility.
// Necessary for using unbind/bindEvent without calling setContainer.
publicAPI.bindEvents = (container) => {
Iif (container === null) {
return;
}
const res = superClass.setContainer(container);
if (res) {
_bindEvents();
}
};
const _unbindEvents = () => {
// Clear any previous timeouts and state variables that control mouse / touchpad behavior.
clearTimeout(model.moveTimeoutID);
clearTimeout(model.wheelTimeoutID);
model.moveTimeoutID = 0;
model.wheelTimeoutID = 0;
wheelCoefficient = 1.0;
const { container } = model;
if (container) {
container.removeEventListener('contextmenu', preventDefault);
container.removeEventListener('wheel', publicAPI.handleWheel);
container.removeEventListener('DOMMouseScroll', publicAPI.handleWheel);
container.removeEventListener(
'pointerenter',
publicAPI.handlePointerEnter
);
container.removeEventListener(
'pointerleave',
publicAPI.handlePointerLeave
);
container.removeEventListener(
'pointermove',
publicAPI.handlePointerMove,
{
passive: false,
}
);
container.removeEventListener(
'pointerdown',
publicAPI.handlePointerDown,
{
passive: false,
}
);
container.removeEventListener('pointerup', publicAPI.handlePointerUp);
container.removeEventListener(
'pointercancel',
publicAPI.handlePointerCancel
);
}
document.removeEventListener('keypress', publicAPI.handleKeyPress);
document.removeEventListener('keydown', publicAPI.handleKeyDown);
document.removeEventListener('keyup', publicAPI.handleKeyUp);
document.removeEventListener(
'pointerlockchange',
publicAPI.handlePointerLockChange
);
pointerCache.clear();
};
publicAPI.unbindEvents = () => {
_unbindEvents();
superClass.setContainer(null);
};
publicAPI.handleKeyPress = (event) => {
const data = getKeysFor(event);
publicAPI.keyPressEvent(data);
};
publicAPI.handleKeyDown = (event) => {
const data = getKeysFor(event);
publicAPI.keyDownEvent(data);
};
publicAPI.handleKeyUp = (event) => {
const data = getKeysFor(event);
publicAPI.keyUpEvent(data);
};
publicAPI.handlePointerEnter = (event) => {
const callData = {
...getModifierKeysFor(event),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
publicAPI.pointerEnterEvent(callData);
if (callData.deviceType === 'mouse') {
publicAPI.mouseEnterEvent(callData);
}
};
publicAPI.handlePointerLeave = (event) => {
const callData = {
...getModifierKeysFor(event),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
publicAPI.pointerLeaveEvent(callData);
if (callData.deviceType === 'mouse') {
publicAPI.mouseLeaveEvent(callData);
}
};
publicAPI.handlePointerDown = (event) => {
if (event.button > 2 || publicAPI.isPointerLocked()) {
// ignore events from extra mouse buttons such as `back` and `forward`
return;
}
if (model.preventDefaultOnPointerDown) {
preventDefault(event);
}
if (event.target.hasPointerCapture(event.pointerId)) {
event.target.releasePointerCapture(event.pointerId);
}
model.container.setPointerCapture(event.pointerId);
if (pointerCache.has(event.pointerId)) {
vtkWarningMacro('[RenderWindowInteractor] duplicate pointerId detected');
}
pointerCache.set(event.pointerId, {
pointerId: event.pointerId,
position: getScreenEventPositionFor(event),
});
switch (event.pointerType) {
case 'pen':
case 'touch':
publicAPI.handleTouchStart(event);
break;
case 'mouse':
default:
publicAPI.handleMouseDown(event);
break;
}
};
publicAPI.handlePointerUp = (event) => {
if (pointerCache.has(event.pointerId)) {
if (model.preventDefaultOnPointerUp) {
preventDefault(event);
}
pointerCache.delete(event.pointerId);
model.container.releasePointerCapture(event.pointerId);
switch (event.pointerType) {
case 'pen':
case 'touch':
publicAPI.handleTouchEnd(event);
break;
case 'mouse':
default:
publicAPI.handleMouseUp(event);
break;
}
}
};
publicAPI.handlePointerCancel = (event) => {
if (pointerCache.has(event.pointerId)) {
pointerCache.delete(event.pointerId);
switch (event.pointerType) {
case 'pen':
case 'touch':
publicAPI.handleTouchEnd(event);
break;
case 'mouse':
default:
publicAPI.handleMouseUp(event);
break;
}
}
};
publicAPI.handlePointerMove = (event) => {
Iif (pointerCache.has(event.pointerId)) {
const pointer = pointerCache.get(event.pointerId);
pointer.position = getScreenEventPositionFor(event);
}
switch (event.pointerType) {
case 'pen':
case 'touch':
publicAPI.handleTouchMove(event);
break;
case 'mouse':
default:
publicAPI.handleMouseMove(event);
break;
}
};
publicAPI.handleMouseDown = (event) => {
const callData = {
...getModifierKeysFor(event),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
switch (event.button) {
case 0:
publicAPI.leftButtonPressEvent(callData);
break;
case 1:
publicAPI.middleButtonPressEvent(callData);
break;
case 2:
publicAPI.rightButtonPressEvent(callData);
break;
default:
vtkErrorMacro(`Unknown mouse button pressed: ${event.button}`);
break;
}
};
//----------------------------------------------------------------------
publicAPI.requestPointerLock = () => {
if (model.container) {
model.container.requestPointerLock();
}
};
//----------------------------------------------------------------------
publicAPI.exitPointerLock = () => document.exitPointerLock?.();
//----------------------------------------------------------------------
publicAPI.isPointerLocked = () =>
!!model.container && document.pointerLockElement === model.container;
//----------------------------------------------------------------------
publicAPI.handlePointerLockChange = () => {
if (publicAPI.isPointerLocked()) {
publicAPI.startPointerLockEvent();
} else {
publicAPI.endPointerLockEvent();
}
};
//----------------------------------------------------------------------
function forceRender() {
if (model._view && model.enabled && model.enableRender) {
model.inRender = true;
model._view.traverseAllPasses();
model.inRender = false;
}
// outside the above test so that third-party code can redirect
// the render to the appropriate class
publicAPI.invokeRenderEvent();
}
publicAPI.requestAnimation = (requestor) => {
if (requestor === undefined) {
vtkErrorMacro(`undefined requester, can not start animating`);
return;
}
if (animationRequesters.has(requestor)) {
vtkWarningMacro(`requester is already registered for animating`);
return;
}
animationRequesters.add(requestor);
if (
!model.animationRequest &&
animationRequesters.size === 1 &&
!model.xrAnimation
) {
model._animationStartTime = Date.now();
model._animationFrameCount = 0;
model.animationRequest = requestAnimationFrame(publicAPI.handleAnimation);
publicAPI.startAnimationEvent();
}
};
// continue animating for at least the specified duration of
// milliseconds.
publicAPI.extendAnimation = (duration) => {
const newEnd = Date.now() + duration;
model._animationExtendedEnd = Math.max(model._animationExtendedEnd, newEnd);
if (
!model.animationRequest &&
animationRequesters.size === 0 &&
!model.xrAnimation
) {
model._animationStartTime = Date.now();
model._animationFrameCount = 0;
model.animationRequest = requestAnimationFrame(publicAPI.handleAnimation);
publicAPI.startAnimationEvent();
}
};
publicAPI.isAnimating = () =>
model.xrAnimation || model.animationRequest !== null;
publicAPI.cancelAnimation = (requestor, skipWarning = false) => {
if (!animationRequesters.has(requestor)) {
if (!skipWarning) {
const requestStr =
requestor && requestor.getClassName
? requestor.getClassName()
: requestor;
vtkWarningMacro(`${requestStr} did not request an animation`);
}
return;
}
animationRequesters.delete(requestor);
if (
model.animationRequest &&
animationRequesters.size === 0 &&
Date.now() > model._animationExtendedEnd
) {
cancelAnimationFrame(model.animationRequest);
model.animationRequest = null;
publicAPI.endAnimationEvent();
publicAPI.render();
}
};
publicAPI.switchToXRAnimation = () => {
// cancel existing animation if any
if (model.animationRequest) {
cancelAnimationFrame(model.animationRequest);
model.animationRequest = null;
}
model.xrAnimation = true;
};
publicAPI.returnFromXRAnimation = () => {
model.xrAnimation = false;
if (animationRequesters.size !== 0) {
model.recentAnimationFrameRate = 10.0;
model.animationRequest = requestAnimationFrame(publicAPI.handleAnimation);
}
};
publicAPI.updateXRGamepads = (xrSession, xrFrame, xrRefSpace) => {
// watch for when buttons change state and fire events
xrSession.inputSources.forEach((inputSource) => {
const gripPose =
inputSource.gripSpace == null
? null
: xrFrame.getPose(inputSource.gripSpace, xrRefSpace);
const targetRayPose =
inputSource.gripSpace == null
? null
: xrFrame.getPose(inputSource.targetRaySpace, xrRefSpace);
const gamepad = inputSource.gamepad;
const hand = inputSource.handedness;
if (!gamepad) {
return;
}
if (!(gamepad.index in model.lastGamepadValues)) {
model.lastGamepadValues[gamepad.index] = {
left: { buttons: {} },
right: { buttons: {} },
none: { buttons: {} },
};
}
for (let buttonIdx = 0; buttonIdx < gamepad.buttons.length; ++buttonIdx) {
if (
!(buttonIdx in model.lastGamepadValues[gamepad.index][hand].buttons)
) {
model.lastGamepadValues[gamepad.index][hand].buttons[
buttonIdx
] = false;
}
if (
model.lastGamepadValues[gamepad.index][hand].buttons[buttonIdx] !==
gamepad.buttons[buttonIdx].pressed &&
gripPose != null
) {
publicAPI.button3DEvent({
gamepad,
position: gripPose.transform.position,
orientation: gripPose.transform.orientation,
targetPosition: targetRayPose.transform.position,
targetOrientation: targetRayPose.transform.orientation,
pressed: gamepad.buttons[buttonIdx].pressed,
device:
inputSource.handedness === 'left'
? Device.LeftController
: Device.RightController,
input:
deviceInputMap[gamepad.mapping] &&
deviceInputMap[gamepad.mapping][buttonIdx]
? deviceInputMap[gamepad.mapping][buttonIdx]
: Input.Trigger,
});
model.lastGamepadValues[gamepad.index][hand].buttons[buttonIdx] =
gamepad.buttons[buttonIdx].pressed;
}
if (
model.lastGamepadValues[gamepad.index][hand].buttons[buttonIdx] &&
gripPose != null
) {
publicAPI.move3DEvent({
gamepad,
position: gripPose.transform.position,
orientation: gripPose.transform.orientation,
targetPosition: targetRayPose.transform.position,
targetOrientation: targetRayPose.transform.orientation,
device:
inputSource.handedness === 'left'
? Device.LeftController
: Device.RightController,
});
}
}
});
};
publicAPI.handleMouseMove = (event) => {
const callData = {
...getModifierKeysFor(event),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
if (model.moveTimeoutID === 0) {
publicAPI.startMouseMoveEvent(callData);
} else E{
publicAPI.mouseMoveEvent(callData);
clearTimeout(model.moveTimeoutID);
}
// start a timer to keep us animating while we get mouse move events
model.moveTimeoutID = setTimeout(() => {
publicAPI.endMouseMoveEvent();
model.moveTimeoutID = 0;
}, 200);
};
publicAPI.handleAnimation = () => {
const currTime = Date.now();
model._animationFrameCount++;
if (
currTime - model._animationStartTime > 1000.0 &&
model._animationFrameCount > 1
) {
model.recentAnimationFrameRate =
(1000.0 * (model._animationFrameCount - 1)) /
(currTime - model._animationStartTime);
model.lastFrameTime = 1.0 / model.recentAnimationFrameRate;
publicAPI.animationFrameRateUpdateEvent();
model._animationStartTime = currTime;
model._animationFrameCount = 1;
}
publicAPI.animationEvent();
forceRender();
if (
animationRequesters.size > 0 ||
Date.now() < model._animationExtendedEnd
) {
model.animationRequest = requestAnimationFrame(publicAPI.handleAnimation);
} else {
cancelAnimationFrame(model.animationRequest);
model.animationRequest = null;
publicAPI.endAnimationEvent();
publicAPI.render();
}
};
publicAPI.handleWheel = (event) => {
preventDefault(event);
/**
* wheel event values can vary significantly across browsers, platforms
* and devices [1]. `normalizeWheel` uses facebook's solution from their
* fixed-data-table repository [2].
*
* [1] https://developer.mozilla.org/en-US/docs/Web/Events/mousewheel
* [2] https://github.com/facebookarchive/fixed-data-table/blob/master/src/vendor_upstream/dom/normalizeWheel.js
*
* This code will return an object with properties:
*
* spinX -- normalized spin speed (use for zoom) - x plane
* spinY -- " - y plane
* pixelX -- normalized distance (to pixels) - x plane
* pixelY -- " - y plane
*
*/
const callData = {
...normalizeWheel(event),
...getModifierKeysFor(event),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
// Wheel events are thought to scroll pages (i.e. multiple lines at once).
// See normalizeWheel() documentation for more context.
// While trackpad wheel events are many small (<1) wheel spins,
// mouse wheel events have absolute spin values higher than 1.
// Here the first spin value is "recorded", and used to normalize
// all the following mouse wheel events.
if (model.wheelTimeoutID === 0) {
// we attempt to distinguish between trackpads and mice
// .3 will be larger than the first trackpad event,
// but small enough to detect some common edge case mice
if (Math.abs(callData.spinY) >= 0.3) {
// Event is coming from mouse wheel
wheelCoefficient = Math.abs(callData.spinY);
} else {
// Event is coming from trackpad
wheelCoefficient = 1;
}
}
callData.spinY /= wheelCoefficient;
if (model.wheelTimeoutID === 0) {
publicAPI.startMouseWheelEvent(callData);
publicAPI.mouseWheelEvent(callData);
} else {
publicAPI.mouseWheelEvent(callData);
clearTimeout(model.wheelTimeoutID);
}
if (model.mouseScrollDebounceByPass) {
publicAPI.extendAnimation(600);
publicAPI.endMouseWheelEvent();
model.wheelTimeoutID = 0;
} else {
// start a timer to keep us animating while we get wheel events
model.wheelTimeoutID = setTimeout(() => {
publicAPI.extendAnimation(600);
publicAPI.endMouseWheelEvent();
model.wheelTimeoutID = 0;
}, 200);
}
};
publicAPI.handleMouseUp = (event) => {
const callData = {
...getModifierKeysFor(event),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
switch (event.button) {
case 0:
publicAPI.leftButtonReleaseEvent(callData);
break;
case 1:
publicAPI.middleButtonReleaseEvent(callData);
break;
case 2:
publicAPI.rightButtonReleaseEvent(callData);
break;
default:
vtkErrorMacro(`Unknown mouse button released: ${event.button}`);
break;
}
};
publicAPI.handleTouchStart = (event) => {
const pointers = [...pointerCache.values()];
// If multitouch
if (model.recognizeGestures && pointers.length > 1) {
const positions = pointerCacheToPositions(pointerCache);
// did we just transition to multitouch?
if (pointers.length === 2) {
const callData = {
...getModifierKeysFor(EMPTY_MOUSE_EVENT),
position: pointers[0].position,
deviceType: getDeviceTypeFor(event),
};
publicAPI.leftButtonReleaseEvent(callData);
}
// handle the gesture
publicAPI.recognizeGesture('TouchStart', positions);
} else if (pointers.length === 1) {
const callData = {
...getModifierKeysFor(EMPTY_MOUSE_EVENT),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
publicAPI.leftButtonPressEvent(callData);
}
};
publicAPI.handleTouchMove = (event) => {
const pointers = [...pointerCache.values()];
if (model.recognizeGestures && pointers.length > 1) {
const positions = pointerCacheToPositions(pointerCache);
publicAPI.recognizeGesture('TouchMove', positions);
} else if (pointers.length === 1) {
const callData = {
...getModifierKeysFor(EMPTY_MOUSE_EVENT),
position: pointers[0].position,
deviceType: getDeviceTypeFor(event),
};
publicAPI.mouseMoveEvent(callData);
}
};
publicAPI.handleTouchEnd = (event) => {
const pointers = [...pointerCache.values()];
if (model.recognizeGestures) {
// No more fingers down
if (pointers.length === 0) {
const callData = {
...getModifierKeysFor(EMPTY_MOUSE_EVENT),
position: getScreenEventPositionFor(event),
deviceType: getDeviceTypeFor(event),
};
publicAPI.leftButtonReleaseEvent(callData);
} else if (pointers.length === 1) {
// If one finger left, end touch and start button press
const positions = pointerCacheToPositions(pointerCache);
publicAPI.recognizeGesture('TouchEnd', positions);
const callData = {
...getModifierKeysFor(EMPTY_MOUSE_EVENT),
position: pointers[0].position,
deviceType: getDeviceTypeFor(event),
};
publicAPI.leftButtonPressEvent(callData);
} else {
// If more than one finger left, keep touch move
const positions = pointerCacheToPositions(pointerCache);
publicAPI.recognizeGesture('TouchMove', positions);
}
} else if (pointers.length === 1) {
const callData = {
...getModifierKeysFor(EMPTY_MOUSE_EVENT),
position: pointers[0].position,
deviceType: getDeviceTypeFor(event),
};
publicAPI.leftButtonReleaseEvent(callData);
}
};
publicAPI.setView = (val) => {
Iif (model._view === val) {
return;
}
model._view = val;
model._view.getRenderable().setInteractor(publicAPI);
publicAPI.modified();
};
publicAPI.getFirstRenderer = () =>
model._view?.getRenderable()?.getRenderersByReference()?.[0];
publicAPI.findPokedRenderer = (x = 0, y = 0) => {
Iif (!model._view) {
return null;
}
// The original order of renderers needs to remain as
// the first one is the one we want to manipulate the camera on.
const rc = model._view?.getRenderable()?.getRenderers();
Iif (!rc || rc.length === 0) {
return null;
}
rc.sort((a, b) => a.getLayer() - b.getLayer());
let interactiveren = null;
let viewportren = null;
let currentRenderer = null;
let count = rc.length;
while (count--) {
const aren = rc[count];
if (model._view.isInViewport(x, y, aren) && aren.getInteractive()) {
currentRenderer = aren;
break;
}
Iif (interactiveren === null && aren.getInteractive()) {
// Save this renderer in case we can't find one in the viewport that
// is interactive.
interactiveren = aren;
}
if (viewportren === null && model._view.isInViewport(x, y, aren)) {
// Save this renderer in case we can't find one in the viewport that
// is interactive.
viewportren = aren;
}
}
// We must have a value. If we found an interactive renderer before, that's
// better than a non-interactive renderer.
Iif (currentRenderer === null) {
currentRenderer = interactiveren;
}
// We must have a value. If we found a renderer that is in the viewport,
// that is better than any old viewport (but not as good as an interactive
// one).
Iif (currentRenderer === null) {
currentRenderer = viewportren;
}
// We must have a value - take anything.
Iif (currentRenderer == null) {
currentRenderer = rc[0];
}
return currentRenderer;
};
// only render if we are not animating. If we are animating
// then renders will happen naturally anyhow and we definitely
// do not want extra renders as the make the apparent interaction
// rate slower.
publicAPI.render = () => {
if (!publicAPI.isAnimating() && !model.inRender) {
forceRender();
}
};
// create the generic Event methods
handledEvents.forEach((eventName) => {
const lowerFirst = eventName.charAt(0).toLowerCase() + eventName.slice(1);
publicAPI[`${lowerFirst}Event`] = (arg) => {
// Check that interactor enabled
Iif (!model.enabled) {
return;
}
// Check that a poked renderer exists
const renderer = publicAPI.getCurrentRenderer();
Iif (!renderer) {
vtkOnceErrorMacro(`
Can not forward events without a current renderer on the interactor.
`);
return;
}
// Pass the eventName and the poked renderer
const callData = {
type: eventName,
pokedRenderer: model.currentRenderer,
firstRenderer: publicAPI.getFirstRenderer(),
// Add the arguments to the call data
...arg,
};
// Call invoke
publicAPI[`invoke${eventName}`](callData);
};
});
// we know we are in multitouch now, so start recognizing
publicAPI.recognizeGesture = (event, positions) => {
// more than two pointers we ignore
if (Object.keys(positions).length > 2) {
return;
}
if (!model.startingEventPositions) {
model.startingEventPositions = {};
}
// store the initial positions
if (event === 'TouchStart') {
Object.keys(positions).forEach((key) => {
model.startingEventPositions[key] = positions[key];
});
// we do not know what the gesture is yet
model.currentGesture = 'Start';
return;
}
// end the gesture if needed
if (event === 'TouchEnd') {
if (model.currentGesture === 'Pinch') {
publicAPI.render();
publicAPI.endPinchEvent();
}
if (model.currentGesture === 'Rotate') {
publicAPI.render();
publicAPI.endRotateEvent();
}
if (model.currentGesture === 'Pan') {
publicAPI.render();
publicAPI.endPanEvent();
}
model.currentGesture = 'Start';
model.startingEventPositions = {};
return;
}
// what are the two pointers we are working with
let count = 0;
const posVals = [];
const startVals = [];
Object.keys(positions).forEach((key) => {
posVals[count] = positions[key];
startVals[count] = model.startingEventPositions[key];
count++;
});
// The meat of the algorithm
// on move events we analyze them to determine what type
// of movement it is and then deal with it.
// calculate the distances
const originalDistance = Math.sqrt(
(startVals[0].x - startVals[1].x) * (startVals[0].x - startVals[1].x) +
(startVals[0].y - startVals[1].y) * (startVals[0].y - startVals[1].y)
);
const newDistance = Math.sqrt(
(posVals[0].x - posVals[1].x) * (posVals[0].x - posVals[1].x) +
(posVals[0].y - posVals[1].y) * (posVals[0].y - posVals[1].y)
);
// calculate rotations
let originalAngle = vtkMath.degreesFromRadians(
Math.atan2(
startVals[1].y - startVals[0].y,
startVals[1].x - startVals[0].x
)
);
let newAngle = vtkMath.degreesFromRadians(
Math.atan2(posVals[1].y - posVals[0].y, posVals[1].x - posVals[0].x)
);
// angles are cyclic so watch for that, 1 and 359 are only 2 apart :)
let angleDeviation = newAngle - originalAngle;
newAngle = newAngle + 180.0 >= 360.0 ? newAngle - 180.0 : newAngle + 180.0;
originalAngle =
originalAngle + 180.0 >= 360.0
? originalAngle - 180.0
: originalAngle + 180.0;
if (Math.abs(newAngle - originalAngle) < Math.abs(angleDeviation)) {
angleDeviation = newAngle - originalAngle;
}
// calculate the translations
const trans = [];
trans[0] =
(posVals[0].x - startVals[0].x + posVals[1].x - startVals[1].x) / 2.0;
trans[1] =
(posVals[0].y - startVals[0].y + posVals[1].y - startVals[1].y) / 2.0;
if (event === 'TouchMove') {
// OK we want to
// - immediately respond to the user
// - allow the user to zoom without panning (saves focal point)
// - allow the user to rotate without panning (saves focal point)
// do we know what gesture we are doing yet? If not
// see if we can figure it out
if (model.currentGesture === 'Start') {
// pinch is a move to/from the center point
// rotate is a move along the circumference
// pan is a move of the center point
// compute the distance along each of these axes in pixels
// the first to break thresh wins
let thresh =
0.01 *
Math.sqrt(
model.container.clientWidth * model.container.clientWidth +
model.container.clientHeight * model.container.clientHeight
);
if (thresh < 15.0) {
thresh = 15.0;
}
const pinchDistance = Math.abs(newDistance - originalDistance);
const rotateDistance =
(newDistance * 3.1415926 * Math.abs(angleDeviation)) / 360.0;
const panDistance = Math.sqrt(
trans[0] * trans[0] + trans[1] * trans[1]
);
if (
pinchDistance > thresh &&
pinchDistance > rotateDistance &&
pinchDistance > panDistance
) {
model.currentGesture = 'Pinch';
const callData = {
scale: 1.0,
touches: positions,
};
publicAPI.startPinchEvent(callData);
} else if (rotateDistance > thresh && rotateDistance > panDistance) {
model.currentGesture = 'Rotate';
const callData = {
rotation: 0.0,
touches: positions,
};
publicAPI.startRotateEvent(callData);
} else if (panDistance > thresh) {
model.currentGesture = 'Pan';
const callData = {
translation: [0, 0],
touches: positions,
};
publicAPI.startPanEvent(callData);
}
} else {
// if we have found a specific type of movement then
// handle it
if (model.currentGesture === 'Rotate') {
const callData = {
rotation: angleDeviation,
touches: positions,
};
publicAPI.rotateEvent(callData);
}
if (model.currentGesture === 'Pinch') {
const callData = {
scale: newDistance / originalDistance,
touches: positions,
};
publicAPI.pinchEvent(callData);
}
if (model.currentGesture === 'Pan') {
const callData = {
translation: trans,
touches: positions,
};
publicAPI.panEvent(callData);
}
}
}
};
publicAPI.handleVisibilityChange = () => {
model._animationStartTime = Date.now();
model._animationFrameCount = 0;
};
publicAPI.setCurrentRenderer = (r) => {
model._forcedRenderer = !!r;
model.currentRenderer = r;
};
publicAPI.setContainer = (container) => {
_unbindEvents();
const res = superClass.setContainer(container ?? null);
if (res) {
_bindEvents();
}
return res;
};
// Stop animating if the renderWindowInteractor is deleted.
publicAPI.delete = () => {
while (animationRequesters.size) {
publicAPI.cancelAnimation(animationRequesters.values().next().value);
}
if (typeof document.hidden !== 'undefined') {
document.removeEventListener(
'visibilitychange',
publicAPI.handleVisibilityChange
);
}
if (model.container) {
publicAPI.setContainer(null);
}
superClass.delete();
};
// Use the Page Visibility API to detect when we switch away from or back to
// this tab, and reset the animationFrameStart. When tabs are not active, browsers
// will stop calling requestAnimationFrame callbacks.
if (typeof document.hidden !== 'undefined') {
document.addEventListener(
'visibilitychange',
publicAPI.handleVisibilityChange,
false
);
}
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
renderWindow: null,
interactorStyle: null,
picker: null,
pickingManager: null,
initialized: false,
enabled: false,
enableRender: true,
currentRenderer: null,
lightFollowCamera: true,
desiredUpdateRate: 30.0,
stillUpdateRate: 2.0,
container: null,
// _view: null,
recognizeGestures: true,
currentGesture: 'Start',
animationRequest: null,
lastFrameTime: 0.1,
recentAnimationFrameRate: 10.0,
wheelTimeoutID: 0,
moveTimeoutID: 0,
lastGamepadValues: {},
preventDefaultOnPointerDown: false,
preventDefaultOnPointerUp: false,
mouseScrollDebounceByPass: false,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Object methods
macro.obj(publicAPI, model);
// run animation at least until this time
model._animationExtendedEnd = 0;
macro.event(publicAPI, model, 'RenderEvent');
handledEvents.forEach((eventName) =>
macro.event(publicAPI, model, eventName)
);
// Create get-only macros
macro.get(publicAPI, model, [
'initialized',
'interactorStyle',
'lastFrameTime',
'recentAnimationFrameRate',
'_view',
]);
// Create get-set macros
macro.setGet(publicAPI, model, [
'container',
'lightFollowCamera',
'enabled',
'enableRender',
'recognizeGestures',
'desiredUpdateRate',
'stillUpdateRate',
'picker',
'preventDefaultOnPointerDown',
'preventDefaultOnPointerUp',
'mouseScrollDebounceByPass',
]);
macro.moveToProtected(publicAPI, model, ['view']);
// For more macro methods, see "Sources/macros.js"
// Object specific methods
vtkRenderWindowInteractor(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkRenderWindowInteractor'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend, handledEvents, ...Constants };
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