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678x 8x 8x 670x 670x 670x 72x 598x 598x 598x 1228x 1228x 1228x 1228x 1228x 214x 96x 96x 96x 96x 96x 96x 6513x 6513x 6513x 6513x 6513x 6513x 443x 443x 443x 443x 443x 443x 443x 443x 443x 443x 1329x 443x 384x 16x 214x 214x 856x 856x 856x 214x | import type vtkVolume from '@kitware/vtk.js/Rendering/Core/Volume';
import vtkColorTransferFunction from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction';
import vtkColorMaps from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps';
import vtkPiecewiseFunction from '@kitware/vtk.js/Common/DataModel/PiecewiseFunction';
import { vec2, vec3 } from 'gl-matrix';
import type { mat4 } from 'gl-matrix';
import cache from '../cache/cache';
import {
MPR_CAMERA_VALUES,
RENDERING_DEFAULTS,
VIEWPORT_PRESETS,
} from '../constants';
import type { BlendModes, InterpolationType, OrientationAxis } from '../enums';
import {
Events,
MetadataModules,
ViewportStatus,
VOILUTFunctionType,
} from '../enums';
import ViewportType from '../enums/ViewportType';
import eventTarget from '../eventTarget';
import { getShouldUseCPURendering } from '../init';
import type {
ActorEntry,
ColormapPublic,
FlipDirection,
IImageData,
IVolumeInput,
OrientationVectors,
Point2,
Point3,
VOIRange,
EventTypes,
VolumeViewportProperties,
ViewReferenceSpecifier,
ReferenceCompatibleOptions,
ViewReference,
IVolumeViewport,
ICamera,
} from '../types';
import type { VoiModifiedEventDetail } from '../types/EventTypes';
import type { PlaneRestriction, ViewportInput } from '../types/IViewport';
import triggerEvent from '../utilities/triggerEvent';
import * as colormapUtils from '../utilities/colormap';
import invertRgbTransferFunction from '../utilities/invertRgbTransferFunction';
import createSigmoidRGBTransferFunction from '../utilities/createSigmoidRGBTransferFunction';
import transformWorldToIndex from '../utilities/transformWorldToIndex';
import {
findMatchingColormap,
updateOpacity as colormapUpdateOpacity,
updateThreshold as colormapUpdateThreshold,
getThresholdValue,
getMaxOpacity,
} from '../utilities/colormap';
import { getTransferFunctionNodes } from '../utilities/transferFunctionUtils';
import type { TransferFunctionNodes } from '../types/ITransferFunctionNode';
import type vtkCamera from '@kitware/vtk.js/Rendering/Core/Camera';
import createVolumeActor from './helpers/createVolumeActor';
import volumeNewImageEventDispatcher, {
resetVolumeNewImageState,
} from './helpers/volumeNewImageEventDispatcher';
import Viewport from './Viewport';
import type { vtkSlabCamera as vtkSlabCameraType } from './vtkClasses/vtkSlabCamera';
import vtkSlabCamera from './vtkClasses/vtkSlabCamera';
import getVolumeViewportScrollInfo from '../utilities/getVolumeViewportScrollInfo';
import { actorIsA, isImageActor } from '../utilities/actorCheck';
import snapFocalPointToSlice from '../utilities/snapFocalPointToSlice';
import getVoiFromSigmoidRGBTransferFunction from '../utilities/getVoiFromSigmoidRGBTransferFunction';
import isEqual, { isEqualAbs, isEqualNegative } from '../utilities/isEqual';
import applyPreset from '../utilities/applyPreset';
import imageIdToURI from '../utilities/imageIdToURI';
import uuidv4 from '../utilities/uuidv4';
import * as metaData from '../metaData';
import { getCameraVectors } from './helpers/getCameraVectors';
import { isContextPoolRenderingEngine } from './helpers/isContextPoolRenderingEngine';
import type vtkRenderer from '@kitware/vtk.js/Rendering/Core/Renderer';
import mprCameraValues from '../constants/mprCameraValues';
import { setConfiguration, getConfiguration } from '@cornerstonejs/core';
import type { Types } from '@cornerstonejs/core';
/**
* Abstract base class for volume viewports. VolumeViewports are used to render
* 3D volumes from which various orientations can be viewed. Since VolumeViewports
* use SharedVolumeMappers behind the scene, memory footprint of visualizations
* of the same volume in different orientations is very small.
*
* For setting volumes on viewports you need to use addVolumesToViewports
* which will add volumes to the specified viewports.
*/
abstract class BaseVolumeViewport extends Viewport {
useCPURendering = false;
private _FrameOfReferenceUID: string;
protected initialTransferFunctionNodes: TransferFunctionNodes;
// Viewport Properties
private globalDefaultProperties: VolumeViewportProperties;
private perVolumeIdDefaultProperties = new Map<
string,
VolumeViewportProperties
>();
// Camera properties
protected initialViewUp: Point3;
protected viewportProperties: VolumeViewportProperties = {};
private volumeIds = new Set<string>();
constructor(props: ViewportInput) {
super(props);
this.useCPURendering = getShouldUseCPURendering();
Iif (this.useCPURendering) {
throw new Error(
'VolumeViewports cannot be used whilst CPU Fallback Rendering is enabled.'
);
}
this._configureRenderingPipeline();
const renderer = this.getRenderer();
const camera = vtkSlabCamera.newInstance();
renderer.setActiveCamera(camera as unknown as vtkCamera);
switch (this.type) {
case ViewportType.ORTHOGRAPHIC:
camera.setParallelProjection(true);
break;
case ViewportType.VOLUME_3D:
camera.setParallelProjection(true);
break;
case ViewportType.PERSPECTIVE:
camera.setParallelProjection(false);
break;
default:
throw new Error(`Unrecognized viewport type: ${this.type}`);
}
this.initializeVolumeNewImageEventDispatcher();
}
static get useCustomRenderingPipeline(): boolean {
return false;
}
public getSliceViewInfo(): {
width: number;
height: number;
sliceIndex: number;
slicePlane: number;
sliceToIndexMatrix: mat4;
indexToSliceMatrix: mat4;
} {
throw new Error('Method not implemented.');
}
protected applyViewOrientation(
orientation: OrientationAxis | OrientationVectors,
resetCamera = true
) {
const { viewPlaneNormal, viewUp } =
this._getOrientationVectors(orientation) || {};
Iif (!viewPlaneNormal || !viewUp) {
return;
}
const camera = this.getVtkActiveCamera();
camera.setDirectionOfProjection(
-viewPlaneNormal[0],
-viewPlaneNormal[1],
-viewPlaneNormal[2]
);
camera.setViewUpFrom(viewUp);
this.initialViewUp = viewUp;
if (resetCamera) {
const t = this as unknown as IVolumeViewport;
t.resetCamera({ resetOrientation: false, resetRotation: false });
}
}
private initializeVolumeNewImageEventDispatcher(): void {
const volumeNewImageHandlerBound = volumeNewImageHandler.bind(this);
const volumeNewImageCleanUpBound = volumeNewImageCleanUp.bind(this);
function volumeNewImageHandler(cameraEvent) {
const { viewportId } = cameraEvent.detail;
Iif (viewportId !== this.id || this.isDisabled) {
return;
}
const viewportImageData = this.getImageData();
if (!viewportImageData) {
return;
}
volumeNewImageEventDispatcher(cameraEvent);
}
function volumeNewImageCleanUp(evt) {
const { viewportId } = evt.detail;
if (viewportId !== this.id) {
return;
}
this.element.removeEventListener(
Events.CAMERA_MODIFIED,
volumeNewImageHandlerBound
);
eventTarget.removeEventListener(
Events.ELEMENT_DISABLED,
volumeNewImageCleanUpBound
);
resetVolumeNewImageState(viewportId);
}
this.element.removeEventListener(
Events.CAMERA_MODIFIED,
volumeNewImageHandlerBound
);
this.element.addEventListener(
Events.CAMERA_MODIFIED,
volumeNewImageHandlerBound
);
eventTarget.addEventListener(
Events.ELEMENT_DISABLED,
volumeNewImageCleanUpBound
);
}
/**
* Sets the properties for the volume viewport on the volume
* Sets the VOILUTFunction property for the volume viewport on the volume
*
* @param VOILUTFunction - Sets the voi mode (LINEAR or SAMPLED_SIGMOID)
* @param volumeId - The volume id to set the properties for (if `undefined`, the first volume)
* @param suppressEvents - If `true`, the viewport will not emit events
*/
private setVOILUTFunction(
voiLUTFunction: VOILUTFunctionType,
volumeId?: string,
suppressEvents?: boolean
): void {
// make sure the VOI LUT function is valid in the VOILUTFunctionType which is enum
if (!Object.values(VOILUTFunctionType).includes(voiLUTFunction)) {
voiLUTFunction = VOILUTFunctionType.LINEAR;
}
const { voiRange } = this.getProperties();
this.setVOI(voiRange, volumeId, suppressEvents);
this.viewportProperties.VOILUTFunction = voiLUTFunction;
}
/**
* Sets the colormap for the volume with the given ID and optionally suppresses events.
*
* @param colormap - The colormap to apply (e.g., "hsv").
* @param volumeId - The ID of the volume to set the colormap for.
* @param suppressEvents - If `true`, events will not be emitted during the colormap a
*
* @returns void
*/
private setColormap(
colormap: ColormapPublic,
volumeId: string,
suppressEvents?: boolean
) {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
if (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
const cfun = vtkColorTransferFunction.newInstance();
let colormapObj = colormapUtils.getColormap(colormap.name);
const { name } = colormap;
if (!colormapObj) {
colormapObj = vtkColorMaps.getPresetByName(name);
}
if (!colormapObj) {
throw new Error(`Colormap ${colormap} not found`);
}
const range = volumeActor
.getProperty()
.getRGBTransferFunction(0)
.getRange();
cfun.applyColorMap(colormapObj);
cfun.setMappingRange(range[0], range[1]);
volumeActor.getProperty().setRGBTransferFunction(0, cfun);
// This configures the viewport to use the most recently applied colormap.
// However, this approach is not optimal when dealing with two volumes, as it prevents retrieval of the
// colormap for Volume A if Volume B's colormap was the last one applied.
this.viewportProperties.colormap = colormap;
if (!suppressEvents) {
const completeColormap = this.getColormap(volumeId);
const eventDetail = {
viewportId: this.id,
colormap: completeColormap,
volumeId,
};
triggerEvent(this.element, Events.VOI_MODIFIED, eventDetail);
triggerEvent(this.element, Events.COLORMAP_MODIFIED, eventDetail);
}
}
/**
* Sets the opacity for the volume with the given ID.
*
* @param colormap - An object containing opacity that can be a number or an array of OpacityMapping
* @param volumeId - The ID of the volume to set the opacity for.
*
* @returns void
*/
private setOpacity(colormap: ColormapPublic, volumeId: string) {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
if (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
const ofun = vtkPiecewiseFunction.newInstance();
if (typeof colormap.opacity === 'number') {
// Use the new utility to update opacity while preserving threshold
colormapUpdateOpacity(volumeActor, colormap.opacity);
} else {
colormap.opacity.forEach(({ opacity, value }) => {
ofun.addPoint(value, opacity);
});
volumeActor.getProperty().setScalarOpacity(0, ofun);
}
if (!this.viewportProperties.colormap) {
this.viewportProperties.colormap = {};
}
this.viewportProperties.colormap.opacity = colormap.opacity;
const matchedColormap = this.getColormap(volumeId);
const eventDetail = {
viewportId: this.id,
colormap: matchedColormap,
volumeId,
};
triggerEvent(this.element, Events.COLORMAP_MODIFIED, eventDetail);
}
/**
* Sets the inversion for the volume transfer function
*
* @param inverted - Should the transfer function be inverted?
* @param volumeId - volumeId
* @param suppressEvents - If `true`, events will not be published
*
* @returns void
*/
private setInvert(
inverted: boolean,
volumeId?: string,
suppressEvents?: boolean
) {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
if (!applicableVolumeActorInfo) {
return;
}
const volumeIdToUse = applicableVolumeActorInfo.volumeId;
const cfun = this._getOrCreateColorTransferFunction(volumeIdToUse);
invertRgbTransferFunction(cfun);
this.viewportProperties.invert = inverted;
if (!suppressEvents) {
const eventDetail: VoiModifiedEventDetail = {
...this.getVOIModifiedEventDetail(volumeIdToUse),
invertStateChanged: true,
};
triggerEvent(this.element, Events.VOI_MODIFIED, eventDetail);
}
}
protected getVOIModifiedEventDetail(
volumeId: string
): VoiModifiedEventDetail {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
Iif (!applicableVolumeActorInfo) {
throw new Error(`No actor found for the given volumeId: ${volumeId}`);
}
const volumeActor = applicableVolumeActorInfo.volumeActor;
const transferFunction = volumeActor
.getProperty()
.getRGBTransferFunction(0);
const range = transferFunction.getMappingRange();
const matchedColormap = this.getColormap(volumeId);
const { VOILUTFunction, invert } = this.getProperties(volumeId);
return {
viewportId: this.id,
range: {
lower: range[0],
upper: range[1],
},
volumeId: applicableVolumeActorInfo.volumeId,
VOILUTFunction: VOILUTFunction,
colormap: matchedColormap,
invert,
};
}
private _getOrCreateColorTransferFunction(
volumeId?: string
): vtkColorTransferFunction {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
Iif (!applicableVolumeActorInfo) {
return null;
}
const { volumeActor } = applicableVolumeActorInfo;
const rgbTransferFunction = volumeActor
.getProperty()
.getRGBTransferFunction(0);
Eif (rgbTransferFunction) {
return rgbTransferFunction;
}
const newRGBTransferFunction = vtkColorTransferFunction.newInstance();
volumeActor.getProperty().setRGBTransferFunction(0, newRGBTransferFunction);
return newRGBTransferFunction;
}
protected setInterpolationType(
interpolationType: InterpolationType,
volumeId?: string
) {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
if (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
const volumeProperty = volumeActor.getProperty();
// @ts-ignore
volumeProperty.setInterpolationType(interpolationType);
this.viewportProperties.interpolationType = interpolationType;
}
/**
* Sets the properties for the volume viewport on the volume
* (if fusion, it sets it for the first volume in the fusion)
*
* @param voiRange - Sets the lower and upper voi
* @param volumeId - The volume id to set the properties for (if undefined, the first volume)
* @param suppressEvents - If true, the viewport will not emit events
*/
private setVOI(
voiRange: VOIRange,
volumeId?: string,
suppressEvents = false
): void {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
Iif (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
const volumeIdToUse = applicableVolumeActorInfo.volumeId;
const voiRangeToUse = voiRange;
// Todo: not sure why this is needed, in the new model this will not work for sure
Iif (typeof voiRangeToUse === 'undefined') {
throw new Error(
'voiRangeToUse is undefined, need to implement this in the new volume model'
);
}
const { VOILUTFunction } = this.getProperties(volumeIdToUse);
// scaling logic here
// https://github.com/Kitware/vtk-js/blob/c6f2e12cddfe5c0386a73f0793eb6d9ab20d573e/Sources/Rendering/OpenGL/VolumeMapper/index.js#L957-L972
Iif (VOILUTFunction === VOILUTFunctionType.SAMPLED_SIGMOID) {
const cfun = createSigmoidRGBTransferFunction(voiRangeToUse);
volumeActor.getProperty().setRGBTransferFunction(0, cfun);
} else {
// TODO: refactor and make it work for PET series (inverted/colormap)
// const cfun = createLinearRGBTransferFunction(voiRangeToUse);
// volumeActor.getProperty().setRGBTransferFunction(0, cfun);
// Todo: Moving from LINEAR to SIGMOID and back to LINEAR will not
// work until we implement it in a different way because the
// LINEAR transfer function is not recreated.
const { lower, upper } = voiRangeToUse;
volumeActor
.getProperty()
.getRGBTransferFunction(0)
.setRange(lower, upper);
}
Eif (!suppressEvents) {
const eventDetail: VoiModifiedEventDetail = {
...this.getVOIModifiedEventDetail(volumeIdToUse),
};
triggerEvent(this.element, Events.VOI_MODIFIED, eventDetail);
}
this.viewportProperties.voiRange = voiRangeToUse;
}
protected setRotation = (rotation: number) => {
const panFit = this.getPan(this.fitToCanvasCamera);
const pan = this.getPan();
const previousCamera = this.getCamera();
const panSub = vec2.sub([0, 0], panFit, pan) as Point2;
this.setPan(panSub, false);
const { flipVertical } = this.getCamera();
// Moving back to zero rotation, for new scrolled slice rotation is 0 after camera reset
const initialViewUp = flipVertical
? vec3.negate([0, 0, 0], this.initialViewUp)
: this.initialViewUp;
this.setCameraNoEvent({
viewUp: initialViewUp as Point3,
});
// rotating camera to the new value
this.rotateCamera(rotation);
const afterPan = this.getPan();
const afterPanFit = this.getPan(this.fitToCanvasCamera);
const newCenter = vec2.sub([0, 0], afterPan, afterPanFit);
const newOffset = vec2.add([0, 0], panFit, newCenter) as Point2;
this.setPan(newOffset, false);
Iif (this._suppressCameraModifiedEvents) {
return;
}
// New camera after rotation
const camera = this.getCamera();
const eventDetail: EventTypes.CameraModifiedEventDetail = {
previousCamera,
camera,
element: this.element,
viewportId: this.id,
renderingEngineId: this.renderingEngineId,
};
triggerEvent(this.element, Events.CAMERA_MODIFIED, eventDetail);
};
private rotateCamera(rotation: number): void {
const rotationToApply = rotation - this.getRotation();
// rotating camera to the new value
this.getVtkActiveCamera().roll(-rotationToApply);
}
/**
* Update the default properties for the volume viewport on the volume
* @param ViewportProperties - The properties to set
* @param volumeId - The volume id to set the default properties for (if `undefined`, we set the global default viewport properties)
*/
public setDefaultProperties(
ViewportProperties: VolumeViewportProperties,
volumeId?: string
): void {
if (volumeId == null) {
this.globalDefaultProperties = ViewportProperties;
} else E{
this.perVolumeIdDefaultProperties.set(volumeId, ViewportProperties);
}
}
/**
* Remove the global default properties of the viewport or remove default properties for a volumeId if specified
* @param volumeId If given, we remove the default properties only for this volumeId, if not
* the global default properties will be removed
*/
public clearDefaultProperties(volumeId?: string): void {
if (volumeId == null) {
this.globalDefaultProperties = {};
this.resetProperties();
} else {
this.perVolumeIdDefaultProperties.delete(volumeId);
this.resetToDefaultProperties(volumeId);
}
}
/**
* Gets a view target, allowing comparison between view positions as well
* as restoring views later.
*/
public getViewReference(
viewRefSpecifier: ViewReferenceSpecifier = {}
): ViewReference {
const target = super.getViewReference(viewRefSpecifier);
const volumeId = this.getVolumeId(viewRefSpecifier);
Eif (viewRefSpecifier?.forFrameOfReference !== false) {
target.volumeId = volumeId;
}
Eif (typeof viewRefSpecifier?.sliceIndex !== 'number') {
return target;
}
const { viewPlaneNormal } = target;
const delta = viewRefSpecifier?.sliceIndex - this.getSliceIndex();
// Calculate a camera focal point and position
const { sliceRangeInfo } = getVolumeViewportScrollInfo(
this as unknown as IVolumeViewport,
volumeId,
true
);
const { sliceRange, spacingInNormalDirection, camera } = sliceRangeInfo;
const { focalPoint, position } = camera;
const { newFocalPoint } = snapFocalPointToSlice(
focalPoint,
position,
sliceRange,
viewPlaneNormal,
spacingInNormalDirection,
delta
);
target.cameraFocalPoint = newFocalPoint;
return target;
}
/**
* Find out if this viewport would show this view
*
* @param options - allows specifying whether the view COULD display this with
* some modification - either navigation or displaying as volume.
* @returns true if the target is compatible with this view
*/
public isReferenceViewable(
viewRef: ViewReference,
options?: ReferenceCompatibleOptions
): boolean {
if (!viewRef.FrameOfReferenceUID) {
return false;
}
if (!super.isReferenceViewable(viewRef, options)) {
return false;
}
if (options?.withNavigation) {
const { referencedImageId } = viewRef;
return !referencedImageId || this.hasImageURI(referencedImageId);
}
const currentSliceIndex = this.getSliceIndex();
const { sliceIndex } = viewRef;
if (Array.isArray(sliceIndex)) {
return (
sliceIndex[0] <= currentSliceIndex && currentSliceIndex <= sliceIndex[1]
);
}
return sliceIndex === undefined || sliceIndex === currentSliceIndex;
}
/**
* Scrolls the viewport in the given direction/amount
*/
public scroll(delta = 1) {
const volumeId = this.getVolumeId();
const { sliceRangeInfo } = getVolumeViewportScrollInfo(
this as unknown as IVolumeViewport,
volumeId,
true
);
if (!sliceRangeInfo) {
return;
}
const { sliceRange, spacingInNormalDirection, camera } = sliceRangeInfo;
const { focalPoint, viewPlaneNormal, position } = camera;
const { newFocalPoint, newPosition } = snapFocalPointToSlice(
focalPoint,
position,
sliceRange,
viewPlaneNormal,
spacingInNormalDirection,
delta
);
this.setCamera({
focalPoint: newFocalPoint,
position: newPosition,
});
this.render();
}
abstract isInAcquisitionPlane(): boolean;
/**
* This will apply a camera orientation that is compatible with inPlaneVector1 and 2
*
* 1. If inPlaneVector1 and inPlaneVector2 are compatible with, no change.
* 2. If dot products of the current view plane normal and inPlaneVector 1 and 2 are zero, no change
*
*/
public setBestOrentation(inPlaneVector1, inPlaneVector2) {
if (!inPlaneVector1 && !inPlaneVector2) {
// Any view is compatible with a point position
return;
}
const { viewPlaneNormal } = this.getCamera();
if (
isCompatible(viewPlaneNormal, inPlaneVector2) &&
isCompatible(viewPlaneNormal, inPlaneVector1)
) {
// Orthogonal view to the current view, so no change.
return;
}
const acquisition = this._getAcquisitionPlaneOrientation();
if (
isCompatible(acquisition.viewPlaneNormal, inPlaneVector2) &&
isCompatible(acquisition.viewPlaneNormal, inPlaneVector1)
) {
// Orthogonal view to the current view, so no change.
this.setOrientation(acquisition);
return;
}
for (const orientation of <{ viewPlaneNormal: Point3 }[]>(
Object.values(mprCameraValues)
)) {
if (
isCompatible(orientation.viewPlaneNormal, inPlaneVector2) &&
isCompatible(orientation.viewPlaneNormal, inPlaneVector1)
) {
// Orthogonal view to the current view, so no change.
this.setOrientation(orientation);
return;
}
}
const planeNormal = <Point3>(
vec3.cross(
vec3.create(),
inPlaneVector2 || acquisition.viewPlaneNormal,
inPlaneVector1
)
);
vec3.normalize(planeNormal, planeNormal);
this.setOrientation({ viewPlaneNormal: planeNormal });
}
/**
* Sets the view reference given a referenced plane and the current
* view plane normal being applied.
* This will use the existing normal if compatible, otherwise will calculate
* a new view plane normal as the referenced plane normal, or else the
* cross product of the existing view plane normal and the inPlaneVector1
*/
public setViewPlane(planeRestriction: PlaneRestriction) {
const { point, inPlaneVector1, inPlaneVector2, FrameOfReferenceUID } =
planeRestriction;
this.setBestOrentation(inPlaneVector1, inPlaneVector2);
this.setViewReference({
FrameOfReferenceUID,
cameraFocalPoint: point,
viewPlaneNormal: this.getCamera().viewPlaneNormal,
});
}
/**
* Navigates to the specified view reference.
*/
public setViewReference(viewRef: ViewReference): void {
Iif (!viewRef) {
return;
}
const volumeId = this.getVolumeId();
const {
FrameOfReferenceUID: refFrameOfReference,
cameraFocalPoint,
referencedImageId,
planeRestriction,
viewPlaneNormal: refViewPlaneNormal,
viewUp,
} = viewRef;
let { sliceIndex } = viewRef;
Iif (planeRestriction && !refViewPlaneNormal) {
return this.setViewPlane(planeRestriction);
}
const { focalPoint, viewPlaneNormal, position } = this.getCamera();
const isNegativeNormal = isEqualNegative(
viewPlaneNormal,
refViewPlaneNormal
);
const isSameNormal = isEqual(viewPlaneNormal, refViewPlaneNormal);
// Handle slices
if (
typeof sliceIndex === 'number' &&
volumeId !== undefined &&
viewRef.volumeId === volumeId &&
(isNegativeNormal || isSameNormal)
) {
const { currentStepIndex, sliceRangeInfo, numScrollSteps } =
getVolumeViewportScrollInfo(
this as unknown as IVolumeViewport,
volumeId,
true
);
const { sliceRange, spacingInNormalDirection } = sliceRangeInfo;
Iif (isNegativeNormal) {
// Convert opposite orientation view refs to normal orientation
sliceIndex = numScrollSteps - sliceIndex - 1;
}
const delta = sliceIndex - currentStepIndex;
const { newFocalPoint, newPosition } = snapFocalPointToSlice(
focalPoint,
position,
sliceRange,
viewPlaneNormal,
spacingInNormalDirection,
delta
);
this.setCamera({ focalPoint: newFocalPoint, position: newPosition });
} else Eif (refFrameOfReference === this.getFrameOfReferenceUID()) {
// Handle same frame of reference navigation
if (refViewPlaneNormal && !isNegativeNormal && !isSameNormal) {
// Need to update the orientation vectors correctly for this case
// this.setCameraNoEvent({ viewPlaneNormal: refViewPlaneNormal, viewUp });
this.setOrientation({ viewPlaneNormal: refViewPlaneNormal, viewUp });
this.setViewReference(viewRef);
return;
}
if (referencedImageId && this.isInAcquisitionPlane()) {
// we can't simply use the scroll function since the order of image
// ids is not guaranteed to be the same as the order of the slices
// so we just need to get the referencedImageId origin from the cache
// and align it with the current focal point and then set cameraFocalPoint
const imagePlaneModule = metaData.get(
MetadataModules.IMAGE_PLANE,
referencedImageId
);
const { imagePositionPatient } = imagePlaneModule;
const { focalPoint } = this.getCamera();
// move the imagePositionPatient in the direction of the viewPlaneNormal
// to the focalPoint
const diffVector = vec3.subtract(
vec3.create(),
focalPoint,
imagePositionPatient
);
// projected distance
const projectedDistance = vec3.dot(diffVector, viewPlaneNormal);
const newImagePositionPatient = vec3.scaleAndAdd(
vec3.create(),
focalPoint,
[-viewPlaneNormal[0], -viewPlaneNormal[1], -viewPlaneNormal[2]],
projectedDistance
);
// this.setViewReference({
// ...viewRef,
// cameraFocalPoint: newImagePositionPatient as Point3,
// });
this.setCamera({
focalPoint: newImagePositionPatient as Point3,
});
this.render();
return;
}
if (cameraFocalPoint) {
const focalDelta = vec3.subtract(
[0, 0, 0],
cameraFocalPoint,
focalPoint
);
const useNormal = refViewPlaneNormal ?? viewPlaneNormal;
const normalDot = vec3.dot(focalDelta, useNormal);
if (!isEqual(normalDot, 0)) {
// Gets the portion of the focal point in the normal direction
vec3.scale(focalDelta, useNormal, normalDot);
}
const newFocal = vec3.add([0, 0, 0], focalPoint, focalDelta) as Point3;
const newPosition = vec3.add([0, 0, 0], position, focalDelta) as Point3;
this.setCamera({ focalPoint: newFocal, position: newPosition });
}
} else {
throw new Error(
`Incompatible view refs: ${refFrameOfReference}!==${this.getFrameOfReferenceUID()}`
);
}
}
/**
* Sets the opacity threshold for a volume with the given ID.
* Values below the threshold will be transparent.
*
* @param colormap - An object containing threshold property
* @param volumeId - The ID of the volume to set the threshold for.
*
* @returns void
*/
private setThreshold(colormap: ColormapPublic, volumeId: string) {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
if (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
// Use the new utility to update threshold while preserving opacity
colormapUpdateThreshold(volumeActor, colormap.threshold);
if (!this.viewportProperties.colormap) {
this.viewportProperties.colormap = {};
}
this.viewportProperties.colormap.threshold = colormap.threshold;
// Trigger COLORMAP_MODIFIED event with threshold information
const matchedColormap = this.getColormap(volumeId);
const eventDetail = {
viewportId: this.id,
colormap: matchedColormap,
volumeId,
};
triggerEvent(this.element, Events.COLORMAP_MODIFIED, eventDetail);
}
/**
* Sets the properties for the volume viewport on the volume
* and if setProperties is called for the first time, the properties will also become the default one.
* (if fusion, it sets it for the first volume in the fusion)
*
* @param VolumeViewportProperties - The properties to set
* @param [VolumeViewportProperties.voiRange] - Sets the lower and upper voi
* @param [VolumeViewportProperties.VOILUTFunction] - Sets the voi mode (LINEAR, or SAMPLED_SIGMOID)
* @param [VolumeViewportProperties.invert] - Inverts the color transfer function
* @param [VolumeViewportProperties.colormap] - Sets the colormap
* @param [VolumeViewportProperties.preset] - Sets the colormap preset
* @param volumeId - The volume id to set the properties for (if undefined, the first volume)
* @param suppressEvents - If true, the viewport will not emit events
*/
public setProperties(
{
voiRange,
VOILUTFunction,
invert,
colormap,
preset,
interpolationType,
slabThickness,
sampleDistanceMultiplier,
}: VolumeViewportProperties = {},
volumeId?: string,
suppressEvents = false
): void {
//If the viewport hasn't been initialized, we need to set the default properties
Eif (this.globalDefaultProperties == null) {
this.setDefaultProperties({
voiRange,
VOILUTFunction,
invert,
colormap,
preset,
slabThickness,
});
}
// invert should be set first, since if we set colormap then we invert
// we basically are doing a reset which is not what we want
Iif (invert !== undefined && this.viewportProperties.invert !== invert) {
this.setInvert(invert, volumeId, suppressEvents);
}
// Note: colormap should always be done first, since we can then
// modify the voiRange
Iif (colormap?.name) {
this.setColormap(colormap, volumeId, suppressEvents);
}
Iif (colormap?.opacity != null) {
this.setOpacity(colormap, volumeId);
}
Iif (colormap?.threshold != null) {
this.setThreshold(colormap, volumeId);
}
Eif (voiRange !== undefined) {
this.setVOI(voiRange, volumeId, suppressEvents);
}
Iif (typeof interpolationType !== 'undefined') {
this.setInterpolationType(interpolationType);
}
Iif (VOILUTFunction !== undefined) {
this.setVOILUTFunction(VOILUTFunction, volumeId, suppressEvents);
}
Iif (preset !== undefined) {
this.setPreset(preset, volumeId, suppressEvents);
}
Iif (slabThickness !== undefined) {
this.setSlabThickness(slabThickness);
}
Iif (sampleDistanceMultiplier !== undefined) {
this.setSampleDistanceMultiplier(sampleDistanceMultiplier);
}
}
/**
* Reset the viewport properties to the default values
*/
public resetToDefaultProperties(volumeId: string): void {
const properties = this.globalDefaultProperties;
if (properties.colormap?.name) {
this.setColormap(properties.colormap, volumeId);
}
if (properties.colormap?.opacity != null) {
this.setOpacity(properties.colormap, volumeId);
}
if (properties.voiRange !== undefined) {
this.setVOI(properties.voiRange, volumeId);
}
if (properties.VOILUTFunction !== undefined) {
this.setVOILUTFunction(properties.VOILUTFunction, volumeId);
}
if (properties.invert !== undefined) {
this.setInvert(properties.invert, volumeId);
}
if (properties.slabThickness !== undefined) {
this.setSlabThickness(properties.slabThickness);
//We need to set the current slabThickness here since setSlabThickness is define in VolumeViewport
this.viewportProperties.slabThickness = properties.slabThickness;
}
if (properties.sampleDistanceMultiplier !== undefined) {
this.setSampleDistanceMultiplier(properties.sampleDistanceMultiplier);
}
if (properties.preset !== undefined) {
this.setPreset(properties.preset, volumeId, false);
}
this.render();
}
/**
* Sets the specified preset for the volume with the given ID
*
* @param presetName - The name of the preset to apply (e.g., "CT-Bone").
* @param volumeId - The ID of the volume to set the preset for.
* @param suppressEvents - If `true`, events will not be emitted during the preset application.
*
* @returns void
*/
private setPreset(presetNameOrObj, volumeId, suppressEvents) {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
if (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
let preset = presetNameOrObj;
if (typeof preset === 'string') {
preset = VIEWPORT_PRESETS.find((preset) => {
return preset.name === presetNameOrObj;
});
}
if (!preset) {
return;
}
applyPreset(volumeActor, preset);
this.viewportProperties.preset = preset;
this.render();
if (!suppressEvents) {
triggerEvent(this.element, Events.PRESET_MODIFIED, {
viewportId: this.id,
volumeId: applicableVolumeActorInfo.volumeId,
actor: volumeActor,
presetName: preset.name,
});
}
}
public setSampleDistanceMultiplier(multiplier: number): void {}
/**
* Retrieve the viewport default properties
* @param volumeId If given, we retrieve the default properties of a volumeId if it exists
* If not given,we return the global properties of the viewport
* @returns default viewport properties including voi, invert, interpolation type, colormap
*/
public getDefaultProperties = (
volumeId?: string
): VolumeViewportProperties => {
let volumeProperties;
if (volumeId !== undefined) {
volumeProperties = this.perVolumeIdDefaultProperties.get(volumeId);
}
if (volumeProperties !== undefined) {
return volumeProperties;
}
return {
...this.globalDefaultProperties,
};
};
/**
* Retrieve the viewport properties
* @param volumeId - The volume id to get the properties for (if undefined, the first volume)
* @returns viewport properties including voi, interpolation type: TODO: slabThickness, invert
*/
public getProperties = (volumeId?: string): VolumeViewportProperties => {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
Iif (!applicableVolumeActorInfo) {
return;
}
const {
colormap: latestColormap,
VOILUTFunction,
interpolationType,
invert,
slabThickness,
preset,
} = this.viewportProperties;
volumeId ||= this.getVolumeId();
const volume = cache.getVolume(volumeId);
Iif (!volume) {
return null;
}
const volumeActorEntry = this.getActors().find((actorEntry) => {
return actorEntry.referencedId === volumeId;
});
Iif (!volumeActorEntry) {
return;
}
const volumeActor = volumeActorEntry.actor as vtkVolume;
const cfun = volumeActor.getProperty().getRGBTransferFunction(0);
const [lower, upper] =
this.viewportProperties?.VOILUTFunction === 'SIGMOID'
? getVoiFromSigmoidRGBTransferFunction(cfun)
: cfun.getRange();
const voiRange = { lower, upper };
const volumeColormap = this.getColormap(volumeId);
const colormap =
volumeId && volumeColormap ? volumeColormap : latestColormap;
return {
colormap: colormap,
voiRange: voiRange,
VOILUTFunction: VOILUTFunction,
interpolationType: interpolationType,
invert: invert,
slabThickness: slabThickness,
preset,
};
};
/**
* This function extracts the nodes from the RGB Transfer Function, transforming each node's x, r, g, b properties
* into a unified array "RGB Points." Then, it compares these RGB Points—specifically the r, g, b values—with
* those in the predefined vtk colormap presets. Upon finding a matching set of r, g, b values, the function identifies and selects the
* corresponding colormap.
*
* Next, the function extracts an array of opacity points, formatted as a sequence of `[x,y]` pairs, where `x` represents a value and
* `y` represents its opacity. It iterates through this array to construct an opacity object that maps each value to its opacity.
*
* The function returns an object that includes the name of the identified colormap and the constructed opacity object.
* @param applicableVolumeActorInfo - The volume actor information for the volume
* @returns colormap information for the volume if identified
*/
private getColormap = (volumeId) => {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
Iif (!applicableVolumeActorInfo) {
return;
}
const { volumeActor } = applicableVolumeActorInfo;
const cfun = this._getOrCreateColorTransferFunction(volumeId);
// @ts-expect-error vtkColorTransferFunction is not typed
const { nodes } = cfun.getState();
const RGBPoints = nodes.reduce((acc, node) => {
acc.push(node.x, node.r, node.g, node.b);
return acc;
}, []);
const matchedColormap = findMatchingColormap(RGBPoints, volumeActor) || {};
const threshold = getThresholdValue(volumeActor);
const opacity = getMaxOpacity(volumeActor);
matchedColormap.threshold = threshold;
matchedColormap.opacity = opacity;
return matchedColormap;
};
/**
* Creates volume actors for all volumes defined in the `volumeInputArray`.
* For each entry, if a `callback` is supplied, it will be called with the new volume actor as input.
* For each entry, if a `blendMode` and/or `slabThickness` is defined, this will be set on the actor's
* `VolumeMapper`.
*
* @param volumeInputArray - The array of `VolumeInput`s which define the volumes to add.
* @param immediate - Whether the `Viewport` should be rendered as soon as volumes are added.
*/
public async setVolumes(
volumeInputArray: IVolumeInput[],
immediate = false,
suppressEvents = false
): Promise<void> {
const volumeId = volumeInputArray[0].volumeId;
const firstImageVolume = cache.getVolume(volumeId);
Iif (!firstImageVolume) {
throw new Error(
`imageVolume with id: ${volumeId} does not exist, you need to create/allocate the volume first`
);
}
const FrameOfReferenceUID = firstImageVolume.metadata.FrameOfReferenceUID;
this._isValidVolumeInputArray(volumeInputArray, FrameOfReferenceUID);
this._FrameOfReferenceUID = FrameOfReferenceUID;
volumeInputArray.forEach((volumeInput) => {
this._addVolumeId(volumeInput.volumeId);
});
const volumeActors = [];
// One actor per volume
for (let i = 0; i < volumeInputArray.length; i++) {
const { volumeId, actorUID, slabThickness, ...rest } =
volumeInputArray[i];
const actor = await createVolumeActor(
volumeInputArray[i],
this.element,
this.id,
suppressEvents
);
// We cannot use only volumeId since then we cannot have for instance more
// than one representation of the same volume (since actors would have the
// same name, and we don't allow that) AND We cannot use only any uid, since
// we rely on the volume in the cache for mapper. So we prefer actorUID if
// it is defined, otherwise we use volumeId for the actor name.
const uid = actorUID || uuidv4();
volumeActors.push({
uid,
actor,
slabThickness,
referencedId: volumeId,
...rest,
});
}
this._setVolumeActors(volumeActors);
this.viewportStatus = ViewportStatus.PRE_RENDER;
this.initializeColorTransferFunction(volumeInputArray);
triggerEvent(this.element, Events.VOLUME_VIEWPORT_NEW_VOLUME, {
viewportId: this.id,
volumeActors,
});
Iif (immediate) {
this.render();
}
}
/**
* Creates and adds volume actors for all volumes defined in the `volumeInputArray`.
* For each entry, if a `callback` is supplied, it will be called with the new volume actor as input.
*
* @param volumeInputArray - The array of `VolumeInput`s which define the volumes to add.
* @param immediate - Whether the `Viewport` should be rendered as soon as volumes are added.
*/
public async addVolumes(
volumeInputArray: IVolumeInput[],
immediate = false,
suppressEvents = false
): Promise<void> {
const firstImageVolume = cache.getVolume(volumeInputArray[0].volumeId);
Iif (!firstImageVolume) {
throw new Error(
`imageVolume with id: ${firstImageVolume.volumeId} does not exist`
);
}
const volumeActors = [];
this._isValidVolumeInputArray(volumeInputArray, this._FrameOfReferenceUID);
volumeInputArray.forEach((volumeInput) => {
this._addVolumeId(volumeInput.volumeId);
});
// One actor per volume
for (let i = 0; i < volumeInputArray.length; i++) {
const { volumeId, visibility, actorUID, slabThickness, ...rest } =
volumeInputArray[i];
const actor = await createVolumeActor(
volumeInputArray[i],
this.element,
this.id,
suppressEvents
);
Iif (!visibility) {
actor.setVisibility(false);
}
// We cannot use only volumeId since then we cannot have for instance more
// than one representation of the same volume (since actors would have the
// same name, and we don't allow that) AND We cannot use only any uid, since
// we rely on the volume in the cache for mapper. So we prefer actorUID if
// it is defined, otherwise we use volumeId for the actor name.
const uid = actorUID || uuidv4();
volumeActors.push({
uid,
actor,
slabThickness,
// although the actor UID is defined, we need to use the volumeId for the
// referencedId, since the actor is created from its volumeId
// and if later we need to grab the referenced volume from cache,
// we can use the referencedId to get the volume from the cache
referencedId: volumeId,
...rest,
});
}
this.addActors(volumeActors);
this.initializeColorTransferFunction(volumeInputArray);
Iif (immediate) {
// render
this.render();
}
}
/**
* It removes the volume actor from the Viewport. If the volume actor is not in
* the viewport, it does nothing.
* @param actorUIDs - Array of actor UIDs to remove. In case of simple volume it will
* be the volume Id, but in case of Segmentation it will be `{volumeId}-{representationType}`
* since the same volume can be rendered in multiple representations.
* @param immediate - If true, the Viewport will be rendered immediately
*/
public removeVolumeActors(actorUIDs: string[], immediate = false): void {
// Todo: This is actually removeActors
this.removeActors(actorUIDs);
if (immediate) {
this.render();
}
}
/**
* It sets the orientation for the camera, the orientation can be one of the
* following: axial, sagittal, coronal, acquisition. Use the `Enums.OrientationAxis`
* to set the orientation. The "acquisition" orientation is the orientation that
* the volume was acquired in (scan axis).
*
* @param orientation - The orientation to set the camera to.
* @param immediate - Whether the `Viewport` should be rendered as soon as the camera is set.
*/
public setOrientation(
_orientation: OrientationAxis | OrientationVectors,
_immediate = true
): void {
console.warn('Method "setOrientation" needs implementation');
}
/**
* Initializes the color transfer function nodes for a given volume.
*
* @param volumeInputArray - Array of volume inputs.
* @param getTransferFunctionNodes - Function to get the transfer function nodes.
* @returns void
*/
private initializeColorTransferFunction(volumeInputArray) {
const selectedVolumeId = volumeInputArray[0].volumeId;
const colorTransferFunction =
this._getOrCreateColorTransferFunction(selectedVolumeId);
if (!this.initialTransferFunctionNodes && colorTransferFunction) {
this.initialTransferFunctionNodes = getTransferFunctionNodes(
colorTransferFunction
);
}
}
private _getApplicableVolumeActor(volumeId?: string) {
const actorEntries = this.getActors();
Iif (!actorEntries?.length) {
return;
}
if (volumeId) {
const actorEntry = actorEntries.find(
(actor) => actor.referencedId === volumeId
);
Iif (!actorEntry) {
return;
}
return {
volumeActor: actorEntry.actor as vtkVolume,
volumeId,
actorUID: actorEntry.uid,
};
}
const defaultActorEntry = actorEntries[0];
return {
volumeActor: defaultActorEntry.actor as vtkVolume,
volumeId: defaultActorEntry.referencedId,
actorUID: defaultActorEntry.uid,
};
}
private async _isValidVolumeInputArray(
volumeInputArray: IVolumeInput[],
FrameOfReferenceUID: string
): Promise<boolean> {
const numVolumes = volumeInputArray.length;
// Check all other volumes exist and have the same FrameOfReference
for (let i = 1; i < numVolumes; i++) {
const imageVolume = cache.getVolume(volumeInputArray[i].volumeId);
if (FrameOfReferenceUID !== imageVolume.metadata.FrameOfReferenceUID) {
throw new Error(
`Volumes being added to viewport ${this.id} do not share the same FrameOfReferenceUID. This is not yet supported`
);
}
}
return true;
}
/**
* Gets the rotation resulting from the value set in setRotation AND taking into
* account any flips that occurred subsequently from the camera provided or the viewport.
*
* @returns the rotation resulting from the value set in setRotation AND taking into
* account any flips that occurred subsequently.
*/
public getRotation = (): number => {
const {
viewUp: currentViewUp,
viewPlaneNormal,
flipVertical,
} = this.getCameraNoRotation();
// The initial view up vector without any rotation, but incorporating vertical flip.
const initialViewUp = flipVertical
? vec3.negate([0, 0, 0], this.initialViewUp)
: this.initialViewUp;
Iif (!initialViewUp) {
return 0;
}
// The angle between the initial and current view up vectors.
// TODO: check with VTK about rounding errors here.
const initialToCurrentViewUpAngle =
(vec3.angle(initialViewUp, currentViewUp) * 180) / Math.PI;
// Now determine if initialToCurrentViewUpAngle is positive or negative by comparing
// the direction of the initial/current view up cross product with the current
// viewPlaneNormal.
const initialToCurrentViewUpCross = vec3.cross(
[0, 0, 0],
initialViewUp,
currentViewUp
);
// The sign of the dot product of the start/end view up cross product and
// the viewPlaneNormal indicates a positive or negative rotation respectively.
const normalDot = vec3.dot(initialToCurrentViewUpCross, viewPlaneNormal);
const value =
normalDot >= 0
? initialToCurrentViewUpAngle
: (360 - initialToCurrentViewUpAngle) % 360;
return value;
};
/**
* gets the visible bounds of the viewport in the world coordinate system
*/
public getBounds(): number[] {
const renderer = this.getRenderer();
const bounds = renderer.computeVisiblePropBounds();
return bounds;
}
/**
* Flip the viewport along the desired axis
* @param flipDirection - FlipDirection
*/
public flip(flipDirection: FlipDirection): void {
super.flip(flipDirection);
}
public getFrameOfReferenceUID = (): string => {
return this._FrameOfReferenceUID;
};
/**
* Checks if the viewport has a volume actor with the given volumeId
* @param volumeId - the volumeId to look for
* @returns Boolean indicating if the volume is present in the viewport
*/
public hasVolumeId(volumeId: string): boolean {
// Note: this assumes that the uid of the volume is the same as the volumeId
// which is not guaranteed to be the case for SEG.
return this.volumeIds.has(volumeId);
}
/**
* Checks if the viewport has a volume with the given volumeURI.
*
* @param volumeURI - The URI of the volume to check for.
* @returns A boolean indicating whether the viewport contains a volume with the given URI.
*/
public hasVolumeURI(volumeURI: string): boolean {
// loop through this.volumeIds and check if any volumeId contains the volumeURI
for (const volumeId of this.volumeIds) {
if (volumeId.includes(volumeURI)) {
return true;
}
}
return false;
}
/**
* Returns the image and its properties that is being shown inside the
* stack viewport. It returns, the image dimensions, image direction,
* image scalar data, vtkImageData object, metadata, and scaling (e.g., PET suvbw)
* Note: since the volume viewport supports fusion, to get the
* image data for a specific volume, use the optional volumeId
* argument.
*
* @param volumeId - The volumeId of the volume to get the image for.
* @returns IImageData
*/
public getImageData(volumeId?: string): IImageData | undefined {
const defaultActor = this.getDefaultActor();
if (!defaultActor) {
return;
}
volumeId ||= this.getVolumeId();
const actorEntry = this.getActors()?.find(
(actor) => actor.referencedId === volumeId
);
Iif (!actorIsA(actorEntry, 'vtkVolume')) {
return;
}
const actor = actorEntry.actor;
const volume = cache.getVolume(volumeId);
const vtkImageData = actor.getMapper().getInputData();
return {
dimensions: vtkImageData.getDimensions(),
spacing: vtkImageData.getSpacing(),
origin: vtkImageData.getOrigin(),
direction: vtkImageData.getDirection(),
imageData: actor.getMapper().getInputData(),
metadata: {
Modality: volume?.metadata?.Modality,
FrameOfReferenceUID: volume?.metadata?.FrameOfReferenceUID,
},
get scalarData() {
return volume?.voxelManager?.getScalarData();
},
scaling: volume?.scaling,
hasPixelSpacing: true,
voxelManager: volume?.voxelManager,
};
}
protected setCameraClippingRange() {
throw new Error('Method not implemented.');
}
public getSliceIndex(): number {
throw new Error('Method not implemented.');
}
public setCamera(
cameraInterface: ICamera,
storeAsInitialCamera?: boolean
): void {
super.setCamera(cameraInterface, storeAsInitialCamera);
// This is very important to set the clipping range for the camera
// for volume viewport, since we are doing slab rendering
this.setCameraClippingRange();
}
/**
* Attaches the volume actors to the viewport.
*
* @param volumeActorEntries - The volume actors to add the viewport.
*
*/
private _setVolumeActors(volumeActorEntries: ActorEntry[]): void {
// New volume actors implies resetting the inverted flag (i.e. like starting from scratch).
for (let i = 0; i < volumeActorEntries.length; i++) {
this.viewportProperties.invert = false;
}
this.setActors(volumeActorEntries);
}
/**
* canvasToWorld Returns the world coordinates of the given `canvasPos`
* projected onto the plane defined by the `Viewport`'s `vtkCamera`'s focal point
* and the direction of projection.
*
* @param canvasPos - The position in canvas coordinates.
* @returns The corresponding world coordinates.
* @public
*/
public canvasToWorldTiled = (canvasPos: Point2): Point3 => {
const vtkCamera = this.getVtkActiveCamera() as vtkSlabCameraType;
/**
* NOTE: this is necessary because we want the coordinate transformation
* respect to the view plane (plane orthogonal to the camera and passing to
* the focal point).
*
* When vtk.js computes the coordinate transformations, it simply uses the
* camera matrix (no ray casting).
*
* However for the volume viewport the clipping range is set to be
* (-RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE, RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE).
* The clipping range is used in the camera method getProjectionMatrix().
* The projection matrix is used then for viewToWorld/worldToView methods of
* the renderer. This means that vkt.js will not return the coordinates of
* the point on the view plane (i.e. the depth coordinate will correspond
* to the focal point).
*
* Therefore the clipping range has to be set to (distance, distance + 0.01),
* where now distance is the distance between the camera position and focal
* point. This is done internally, in our camera customization when the flag
* isPerformingCoordinateTransformation is set to true.
*/
vtkCamera.setIsPerformingCoordinateTransformation?.(true);
const renderer = this.getRenderer();
const displayCoords = this.getVtkDisplayCoordsTiled(canvasPos);
const offscreenMultiRenderWindow =
this.getRenderingEngine().offscreenMultiRenderWindow;
const openGLRenderWindow =
offscreenMultiRenderWindow.getOpenGLRenderWindow();
const worldCoord = openGLRenderWindow.displayToWorld(
displayCoords[0],
displayCoords[1],
displayCoords[2],
renderer
);
vtkCamera.setIsPerformingCoordinateTransformation?.(false);
return [worldCoord[0], worldCoord[1], worldCoord[2]];
};
public canvasToWorldContextPool = (canvasPos: Point2): Point3 => {
const vtkCamera = this.getVtkActiveCamera() as vtkSlabCameraType;
/**
* NOTE: this is necessary because we want the coordinate transformation
* respect to the view plane (plane orthogonal to the camera and passing to
* the focal point).
*
* When vtk.js computes the coordinate transformations, it simply uses the
* camera matrix (no ray casting).
*
* However for the volume viewport the clipping range is set to be
* (-RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE, RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE).
* The clipping range is used in the camera method getProjectionMatrix().
* The projection matrix is used then for viewToWorld/worldToView methods of
* the renderer. This means that vkt.js will not return the coordinates of
* the point on the view plane (i.e. the depth coordinate will correspond
* to the focal point).
*
* Therefore the clipping range has to be set to (distance, distance + 0.01),
* where now distance is the distance between the camera position and focal
* point. This is done internally, in our camera customization when the flag
* isPerformingCoordinateTransformation is set to true.
*/
vtkCamera.setIsPerformingCoordinateTransformation?.(true);
const renderer = this.getRenderer();
const devicePixelRatio = window.devicePixelRatio || 1;
const { width, height } = this.canvas;
const aspectRatio = width / height;
// Convert canvas coordinates to normalized display coordinates
const canvasPosWithDPR = [
canvasPos[0] * devicePixelRatio,
canvasPos[1] * devicePixelRatio,
];
// Normalize to [0,1] range
const normalizedDisplay = [
canvasPosWithDPR[0] / width,
1 - canvasPosWithDPR[1] / height, // Flip Y axis
0,
];
// Transform from normalized display to world coordinates
const projCoords = renderer.normalizedDisplayToProjection(
normalizedDisplay[0],
normalizedDisplay[1],
normalizedDisplay[2]
);
const viewCoords = renderer.projectionToView(
projCoords[0],
projCoords[1],
projCoords[2],
aspectRatio
);
const worldCoord = renderer.viewToWorld(
viewCoords[0],
viewCoords[1],
viewCoords[2]
);
vtkCamera.setIsPerformingCoordinateTransformation?.(false);
return [worldCoord[0], worldCoord[1], worldCoord[2]];
};
/**
* Returns the VTK.js display coordinates of the given `canvasPos` projected onto the
* `Viewport`'s `vtkCamera`'s focal point and the direction of projection.
* @param canvasPos - The position in canvas coordinates.
* @returns The corresponding display coordinates.
*
*/
public getVtkDisplayCoordsTiled = (canvasPos: Point2): Point3 => {
const devicePixelRatio = window.devicePixelRatio || 1;
const canvasPosWithDPR = [
canvasPos[0] * devicePixelRatio,
canvasPos[1] * devicePixelRatio,
];
const offscreenMultiRenderWindow =
this.getRenderingEngine().offscreenMultiRenderWindow;
const openGLRenderWindow =
offscreenMultiRenderWindow.getOpenGLRenderWindow();
const size = openGLRenderWindow.getSize();
const displayCoord = [
canvasPosWithDPR[0] + this.sx,
canvasPosWithDPR[1] + this.sy,
];
// The y axis display coordinates are inverted with respect to canvas coords
displayCoord[1] = size[1] - displayCoord[1];
return [displayCoord[0], displayCoord[1], 0];
};
public getVtkDisplayCoordsContextPool = (canvasPos: Point2): Point3 => {
const devicePixelRatio = window.devicePixelRatio || 1;
const canvasPosWithDPR = [
canvasPos[0] * devicePixelRatio,
canvasPos[1] * devicePixelRatio,
];
const { height } = this.canvas;
// Canvas coordinates with origin at top-left
// VTK display coordinates have origin at bottom-left
const displayCoord = [canvasPosWithDPR[0], height - canvasPosWithDPR[1]];
return [displayCoord[0], displayCoord[1], 0];
};
/**
* Returns the canvas coordinates of the given `worldPos`
* projected onto the `Viewport`'s `canvas`.
*
* @param worldPos - The position in world coordinates.
* @returns The corresponding canvas coordinates.
* @public
*/
public worldToCanvasTiled = (worldPos: Point3): Point2 => {
const vtkCamera = this.getVtkActiveCamera() as vtkSlabCameraType;
/**
* NOTE: this is necessary because we want the coordinate transformation
* respect to the view plane (plane orthogonal to the camera and passing to
* the focal point).
*
* When vtk.js computes the coordinate transformations, it simply uses the
* camera matrix (no ray casting).
*
* However for the volume viewport the clipping range is set to be
* (-RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE, RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE).
* The clipping range is used in the camera method getProjectionMatrix().
* The projection matrix is used then for viewToWorld/worldToView methods of
* the renderer. This means that vkt.js will not return the coordinates of
* the point on the view plane (i.e. the depth coordinate will corresponded
* to the focal point).
*
* Therefore the clipping range has to be set to (distance, distance + 0.01),
* where now distance is the distance between the camera position and focal
* point. This is done internally, in our camera customization when the flag
* isPerformingCoordinateTransformation is set to true.
*/
vtkCamera.setIsPerformingCoordinateTransformation?.(true);
const renderer = this.getRenderer();
const offscreenMultiRenderWindow =
this.getRenderingEngine().offscreenMultiRenderWindow;
const openGLRenderWindow =
offscreenMultiRenderWindow.getOpenGLRenderWindow();
const size = openGLRenderWindow.getSize();
const displayCoord = openGLRenderWindow.worldToDisplay(
...worldPos,
renderer
);
// The y axis display coordinates are inverted with respect to canvas coords
displayCoord[1] = size[1] - displayCoord[1];
const canvasCoord = [
displayCoord[0] - this.sx,
displayCoord[1] - this.sy,
] as Point2;
const devicePixelRatio = window.devicePixelRatio || 1;
const canvasCoordWithDPR = [
canvasCoord[0] / devicePixelRatio,
canvasCoord[1] / devicePixelRatio,
] as Point2;
vtkCamera.setIsPerformingCoordinateTransformation(false);
return canvasCoordWithDPR;
};
public worldToCanvasContextPool = (worldPos: Point3): Point2 => {
const vtkCamera = this.getVtkActiveCamera() as vtkSlabCameraType;
/**
* NOTE: this is necessary because we want the coordinate transformation
* respect to the view plane (plane orthogonal to the camera and passing to
* the focal point).
*
* When vtk.js computes the coordinate transformations, it simply uses the
* camera matrix (no ray casting).
*
* However for the volume viewport the clipping range is set to be
* (-RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE, RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE).
* The clipping range is used in the camera method getProjectionMatrix().
* The projection matrix is used then for viewToWorld/worldToView methods of
* the renderer. This means that vkt.js will not return the coordinates of
* the point on the view plane (i.e. the depth coordinate will corresponded
* to the focal point).
*
* Therefore the clipping range has to be set to (distance, distance + 0.01),
* where now distance is the distance between the camera position and focal
* point. This is done internally, in our camera customization when the flag
* isPerformingCoordinateTransformation is set to true.
*/
vtkCamera.setIsPerformingCoordinateTransformation?.(true);
const renderer = this.getRenderer();
const { width, height } = this.canvas;
const aspectRatio = width / height;
// Transform from world to view coordinates
const viewCoords = renderer.worldToView(
worldPos[0],
worldPos[1],
worldPos[2]
);
// Transform from view to projection coordinates
const projCoords = renderer.viewToProjection(
viewCoords[0],
viewCoords[1],
viewCoords[2],
aspectRatio
);
// Transform from projection to normalized display coordinates
const normalizedDisplay = renderer.projectionToNormalizedDisplay(
projCoords[0],
projCoords[1],
projCoords[2]
);
// Convert normalized display [0,1] to canvas pixels
const canvasX = normalizedDisplay[0] * width;
const canvasY = (1 - normalizedDisplay[1]) * height; // Flip Y axis
const devicePixelRatio = window.devicePixelRatio || 1;
const canvasCoordWithDPR = [
canvasX / devicePixelRatio,
canvasY / devicePixelRatio,
] as Point2;
vtkCamera.setIsPerformingCoordinateTransformation(false);
return canvasCoordWithDPR;
};
/**
* Get the renderer for this viewport - handles ContextPoolRenderingEngine
*/
public getRendererContextPool(): vtkRenderer {
const renderingEngine = this.getRenderingEngine();
return renderingEngine.getRenderer(this.id);
}
/**
* Returns the `vtkRenderer` responsible for rendering the `Viewport`.
*
* @returns The `vtkRenderer` for the `Viewport`.
*/
public getRendererTiled(): vtkRenderer {
const renderingEngine = this.getRenderingEngine();
if (!renderingEngine || renderingEngine.hasBeenDestroyed) {
throw new Error('Rendering engine has been destroyed');
}
return renderingEngine.offscreenMultiRenderWindow?.getRenderer(this.id);
}
/*
* Checking if the imageURI (as a URI or an ID) is in the volumes that are being
* rendered by the viewport.
*
* @param imageURI - The imageURI or imageID to check
* @returns True if the image is in the volumes that are being rendered by the viewport
*/
public hasImageURI = (imageURI: string): boolean => {
const volumeActors = this.getActors().filter((actorEntry) =>
actorIsA(actorEntry, 'vtkVolume')
);
return volumeActors.some(({ uid, referencedId }) => {
const volume = cache.getVolume(referencedId || uid);
if (!volume?.getImageIdIndex) {
return false;
}
return (
volume.getImageIdIndex(imageURI) !== undefined ||
volume.getImageURIIndex(imageURI) !== undefined
);
});
};
/**
* Gets a view up given a view plane normal and the current orientation
* Chooses the current view up if orthogonal, otherwise the default view ups
* for axial, sagittal and coronal
* Otherwise runs the Gram-Schmidt algorithm with the current viewUp
*/
protected _getViewUp(viewPlaneNormal): Point3 {
const { viewUp } = this.getCamera();
const dot = vec3.dot(viewUp, viewPlaneNormal);
if (isEqual(dot, 0)) {
// Don't change the view up if not needed
return viewUp;
}
if (isEqualAbs(viewPlaneNormal[0], 1)) {
return [0, 0, 1];
}
if (isEqualAbs(viewPlaneNormal[1], 1)) {
return [0, 0, 1];
}
if (isEqualAbs(viewPlaneNormal[2], 1)) {
return [0, -1, 0];
}
const vupOrthogonal = <Point3>(
vec3.scaleAndAdd(vec3.create(), viewUp, viewPlaneNormal, -dot)
);
vec3.normalize(vupOrthogonal, vupOrthogonal);
return vupOrthogonal;
}
protected _getOrientationVectors(
orientation: OrientationAxis | OrientationVectors
): OrientationVectors {
if (typeof orientation === 'object') {
if (orientation.viewPlaneNormal) {
return {
...orientation,
viewUp:
orientation.viewUp || this._getViewUp(orientation.viewPlaneNormal),
};
} else E{
throw new Error(
'Invalid orientation object. It must contain viewPlaneNormal'
);
}
} else Eif (typeof orientation === 'string') {
Iif (orientation === 'acquisition') {
return this._getAcquisitionPlaneOrientation();
} else if (
orientation === 'reformat' ||
(orientation as string).includes('_reformat')
) {
return getCameraVectors(this, {
useViewportNormal: true,
});
} else Eif (MPR_CAMERA_VALUES[orientation]) {
this.viewportProperties.orientation = orientation;
return MPR_CAMERA_VALUES[orientation];
}
}
throw new Error(
`Invalid orientation: ${orientation}. Valid orientations are: ${Object.keys(
MPR_CAMERA_VALUES
).join(', ')}`
);
}
protected _getAcquisitionPlaneOrientation(): OrientationVectors {
const actorEntry = this.getDefaultActor();
if (!actorEntry) {
return;
}
// Todo: fix this after we add the volumeId reference to actorEntry later
// in the segmentation refactor
const volumeId = this.getVolumeId();
const imageVolume = cache.getVolume(volumeId);
if (!imageVolume) {
throw new Error(
`imageVolume with id: ${volumeId} does not exist in cache`
);
}
const { direction } = imageVolume;
const viewPlaneNormal = direction.slice(6, 9).map((x) => -x) as Point3;
const viewUp = (direction.slice(3, 6) as Point3).map((x) => -x) as Point3;
return {
viewPlaneNormal,
viewUp,
};
}
/**
* Gets the largest slab thickness from all actors in the viewport.
*
* @returns slabThickness - The slab thickness.
*/
public getSlabThickness(): number {
const actors = this.getActors();
let slabThickness = RENDERING_DEFAULTS.MINIMUM_SLAB_THICKNESS;
actors.forEach((actor) => {
Iif (actor.slabThickness > slabThickness) {
slabThickness = actor.slabThickness;
}
});
return slabThickness;
}
/**
* Given a point in world coordinates, return the intensity at that point
* @param point - The point in world coordinates to get the intensity
* from.
* @returns The intensity value of the voxel at the given point.
*/
public getIntensityFromWorld(point: Point3): number {
const actorEntry = this.getDefaultActor();
if (!actorIsA(actorEntry, 'vtkVolume')) {
return;
}
const { actor } = actorEntry;
const imageData = actor.getMapper().getInputData();
const volume = cache.getVolume(this.getVolumeId());
const index = transformWorldToIndex(imageData, point);
return volume.voxelManager.getAtIJKPoint(index) as number;
}
/**
* Returns the list of image Ids for the current viewport
*
* @param volumeId - volumeId
* @returns list of strings for image Ids
*/
public getImageIds = (volumeId?: string): string[] => {
const applicableVolumeActorInfo = this._getApplicableVolumeActor(volumeId);
Iif (!applicableVolumeActorInfo) {
throw new Error(`No actor found for the given volumeId: ${volumeId}`);
}
const volumeIdToUse = applicableVolumeActorInfo.volumeId;
const imageVolume = cache.getVolume(volumeIdToUse);
Iif (!imageVolume) {
throw new Error(
`imageVolume with id: ${volumeIdToUse} does not exist in cache`
);
}
return imageVolume.imageIds;
};
abstract getCurrentImageId(): string | undefined;
/**
* Gets the volumeId to use for references.
* Returns undefined if the specified volume is NOT in this viewport.
*/
public getVolumeId(specifier?: ViewReferenceSpecifier) {
const actorEntries = this.getActors();
Iif (!actorEntries) {
return;
}
Eif (!specifier?.volumeId) {
// find the first image actor of instance type vtkVolume
const found = actorEntries.find(
(actorEntry) => actorEntry.actor.getClassName() === 'vtkVolume'
);
return found?.referencedId || found?.uid;
}
// See if this volumeId can be found in one of the actors for this
// viewport. This check will cause undefined to be returned when the
// volumeId isn't currently shown in this viewport.
const found = actorEntries.find(
(actorEntry) =>
actorEntry.actor.getClassName() === 'vtkVolume' &&
actorEntry.referencedId === specifier?.volumeId
);
return found?.referencedId || found?.uid;
}
/**
* For a volume viewport, the reference id will be a URN starting with
* `volumeId:<volumeId>`, followed by additional arguments to specify
* the view orientation. This will end up being a unique string that
* identifies the view reference being shown. It is different from the
* view reference in that the values are all incorporated into a string to
* allow using it as a parameter key.
*/
public getViewReferenceId(specifier: ViewReferenceSpecifier = {}): string {
let { volumeId, sliceIndex: sliceIndex } = specifier;
Eif (!volumeId) {
const actorEntries = this.getActors();
Iif (!actorEntries) {
return;
}
// find the first image actor of instance type vtkVolume
volumeId = actorEntries.find(
(actorEntry) => actorEntry.actor.getClassName() === 'vtkVolume'
)?.referencedId;
}
const currentIndex = this.getSliceIndex();
sliceIndex ??= currentIndex;
const { viewPlaneNormal, focalPoint } = this.getCamera();
const querySeparator = volumeId.includes('?') ? '&' : '?';
// Format each element of viewPlaneNormal to 3 decimal places
// to avoid floating point precision issues
const formattedNormal = viewPlaneNormal.map((v) => v.toFixed(3)).join(',');
return `volumeId:${volumeId}${querySeparator}sliceIndex=${sliceIndex}&viewPlaneNormal=${formattedNormal}`;
}
private _addVolumeId(volumeId: string): void {
this.volumeIds.add(volumeId);
}
abstract setBlendMode(
blendMode: BlendModes,
filterActorUIDs?: string[],
immediate?: boolean
): void;
abstract setSlabThickness(
slabThickness: number,
filterActorUIDs?: string[]
): void;
abstract resetSlabThickness(): void;
abstract resetProperties(volumeId?: string): void;
/**
* Returns an array of all volumeIds currently in the viewport.
*
* @returns An array of strings representing all volumeIds.
*/
public getAllVolumeIds(): string[] {
return Array.from(this.volumeIds);
}
private _configureRenderingPipeline() {
const isContextPool = isContextPoolRenderingEngine();
for (const key in this.renderingPipelineFunctions) {
Eif (
Object.prototype.hasOwnProperty.call(
this.renderingPipelineFunctions,
key
)
) {
const functions = this.renderingPipelineFunctions[key];
this[key] = isContextPool ? functions.contextPool : functions.tiled;
}
}
}
protected renderingPipelineFunctions = {
worldToCanvas: {
tiled: this.worldToCanvasTiled,
contextPool: this.worldToCanvasContextPool,
},
canvasToWorld: {
tiled: this.canvasToWorldTiled,
contextPool: this.canvasToWorldContextPool,
},
getVtkDisplayCoords: {
tiled: this.getVtkDisplayCoordsTiled,
contextPool: this.getVtkDisplayCoordsContextPool,
},
getRenderer: {
tiled: this.getRendererTiled,
contextPool: this.getRendererContextPool,
},
};
}
/** Checks of a vector is compatible with the view plane normal */
function isCompatible(viewPlaneNormal, vector) {
return !vector || isEqual(vec3.dot(viewPlaneNormal, vector), 0);
}
export default BaseVolumeViewport;
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