Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 | 210x 210x 210x 210x 210x 210x 210x 210x 210x 210x 210x 202x 210x 210x 16x 16x 170x 170x 170x 170x 170x 170x 24x 24x 24x 24x 24x 24x 24x 24x 24x 2842x 2842x 2842x 2842x 210x 686x 686x 686x 468x 686x 686x 686x 686x 686x 686x 682x 682x 682x 682x 380x 380x 380x 380x 380x 380x 380x 380x 686x 396x 396x 686x 614x 614x 686x 72x 72x 72x 72x 72x 72x 72x 72x 210x 210x 847x 847x 210x 112x 112x 112x 112x 112x 112x 388x 388x 388x 388x 388x 210x | import { mat4, vec3 } from 'gl-matrix';
import vtkPlane from '@kitware/vtk.js/Common/DataModel/Plane';
import type vtkVolume from '@kitware/vtk.js/Rendering/Core/Volume';
import cache from '../cache/cache';
import { EPSILON, MPR_CAMERA_VALUES, RENDERING_DEFAULTS } from '../constants';
import type { BlendModes } from '../enums';
import { OrientationAxis, Events } from '../enums';
import type {
ActorEntry,
IImageVolume,
IVolumeInput,
OrientationVectors,
Point3,
EventTypes,
ViewReference,
ViewReferenceSpecifier,
} from '../types';
import type { ViewportInput } from '../types/IViewport';
import { actorIsA, isImageActor } from '../utilities/actorCheck';
import getClosestImageId from '../utilities/getClosestImageId';
import getSliceRange from '../utilities/getSliceRange';
import getSpacingInNormalDirection from '../utilities/getSpacingInNormalDirection';
import snapFocalPointToSlice from '../utilities/snapFocalPointToSlice';
import triggerEvent from '../utilities/triggerEvent';
import BaseVolumeViewport from './BaseVolumeViewport';
import setDefaultVolumeVOI from './helpers/setDefaultVolumeVOI';
import { setTransferFunctionNodes } from '../utilities/transferFunctionUtils';
import type { ImageActor } from '../types/IActor';
import getImageSliceDataForVolumeViewport from '../utilities/getImageSliceDataForVolumeViewport';
import { transformCanvasToIJK } from '../utilities/transformCanvasToIJK';
import { transformIJKToCanvas } from '../utilities/transformIJKToCanvas';
import type vtkMapper from '@kitware/vtk.js/Rendering/Core/Mapper';
import getVolumeViewportScrollInfo from '../utilities/getVolumeViewportScrollInfo';
import {
calculateCameraPosition,
getCameraVectors,
} from './helpers/getCameraVectors';
/**
* An object representing a VolumeViewport. 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.
*/
class VolumeViewport extends BaseVolumeViewport {
private _useAcquisitionPlaneForViewPlane = false;
constructor(props: ViewportInput) {
super(props);
const { orientation } = this.options;
// if the camera is set to be acquisition axis then we need to skip
// it for now until the volume is set
Eif (orientation && orientation !== OrientationAxis.ACQUISITION) {
this.applyViewOrientation(orientation);
return;
}
this._useAcquisitionPlaneForViewPlane = true;
}
/**
* 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`);
}
Iif (this._useAcquisitionPlaneForViewPlane) {
this._setViewPlaneToAcquisitionPlane(firstImageVolume);
this._useAcquisitionPlaneForViewPlane = false;
} else if (
this.options.orientation &&
typeof this.options.orientation === 'string'
) {
Iif (this.options.orientation.includes('_reformat')) {
this._setViewPlaneToReformatOrientation(
this.options.orientation,
firstImageVolume
);
}
}
return super.setVolumes(volumeInputArray, immediate, suppressEvents);
}
/** Gets the number of slices the volume is broken up into in the camera direction */
public getNumberOfSlices = (): number => {
const { numberOfSlices } = getImageSliceDataForVolumeViewport(this) || {};
return numberOfSlices;
};
/**
* 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`
);
}
Iif (this._useAcquisitionPlaneForViewPlane) {
this._setViewPlaneToAcquisitionPlane(firstImageVolume);
this._useAcquisitionPlaneForViewPlane = false;
} else Eif (
this.options.orientation &&
typeof this.options.orientation === 'string'
) {
Iif (this.options.orientation.includes('_reformat')) {
this._setViewPlaneToReformatOrientation(
this.options.orientation,
firstImageVolume
);
}
}
return super.addVolumes(volumeInputArray, immediate, suppressEvents);
}
public jumpToWorld(worldPos: Point3): boolean {
const { focalPoint } = this.getCamera();
const delta: Point3 = [0, 0, 0];
vec3.sub(delta, worldPos, focalPoint);
const camera = this.getCamera();
const normal = camera.viewPlaneNormal;
const dotProd = vec3.dot(delta, normal);
const projectedDelta = vec3.fromValues(normal[0], normal[1], normal[2]);
vec3.scale(projectedDelta, projectedDelta, dotProd);
if (
Math.abs(projectedDelta[0]) > 1e-3 ||
Math.abs(projectedDelta[1]) > 1e-3 ||
Math.abs(projectedDelta[2]) > 1e-3
) {
const newFocalPoint: Point3 = [0, 0, 0];
const newPosition: Point3 = [0, 0, 0];
vec3.add(newFocalPoint, camera.focalPoint, projectedDelta);
vec3.add(newPosition, camera.position, projectedDelta);
this.setCamera({
focalPoint: newFocalPoint,
position: newPosition,
});
this.render();
}
return true;
}
/**
* 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 {
let viewPlaneNormal, viewUp;
// check if the orientation is a string or an object
if (typeof orientation === 'string') {
Iif (orientation === OrientationAxis.ACQUISITION) {
// Acquisition orientation is determined from the volume data
({ viewPlaneNormal, viewUp } = super._getAcquisitionPlaneOrientation());
} else if (
orientation === OrientationAxis.REFORMAT ||
(orientation as string).includes('_reformat')
) {
({ viewPlaneNormal, viewUp } = getCameraVectors(this, {
useViewportNormal: true,
}));
} else Eif (MPR_CAMERA_VALUES[orientation]) {
({ viewPlaneNormal, viewUp } = MPR_CAMERA_VALUES[orientation]);
} else {
throw new Error(
`Invalid orientation: ${orientation}. Use Enums.OrientationAxis instead.`
);
}
this.setCamera({
viewPlaneNormal,
viewUp,
});
this.viewportProperties.orientation = orientation;
this.resetCamera();
} else E{
({ viewPlaneNormal, viewUp } = orientation);
this.applyViewOrientation(orientation);
}
Eif (immediate) {
this.render();
}
}
protected setCameraClippingRange() {
const activeCamera = this.getVtkActiveCamera();
Iif (!activeCamera) {
console.warn('No active camera found');
return;
}
if (activeCamera.getParallelProjection()) {
// which makes more sense. However, in situations like MPR where the camera is
// oblique, the slab thickness might not be sufficient.
activeCamera.setClippingRange(
-RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE,
RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE
);
} else E{
activeCamera.setClippingRange(
RENDERING_DEFAULTS.MINIMUM_SLAB_THICKNESS,
RENDERING_DEFAULTS.MAXIMUM_RAY_DISTANCE
);
}
}
private _setViewPlaneToReformatOrientation(
orientation: OrientationAxis,
imageVolume: IImageVolume
): void {
let viewPlaneNormal, viewUp;
if (imageVolume) {
const { direction } = imageVolume;
({ viewPlaneNormal, viewUp } = calculateCameraPosition(
direction.slice(0, 3) as Point3,
direction.slice(3, 6) as Point3,
direction.slice(6, 9) as Point3,
orientation
));
} else {
({ viewPlaneNormal, viewUp } = this._getAcquisitionPlaneOrientation());
}
this.setCamera({
viewPlaneNormal,
viewUp,
});
this.initialViewUp = viewUp;
this.resetCamera();
}
private _setViewPlaneToAcquisitionPlane(imageVolume: IImageVolume): void {
let viewPlaneNormal, viewUp;
if (imageVolume) {
const { direction } = imageVolume;
viewPlaneNormal = direction.slice(6, 9).map((x) => -x) as Point3;
viewUp = (direction.slice(3, 6) as Point3).map((x) => -x) as Point3;
} else {
({ viewPlaneNormal, viewUp } = this._getAcquisitionPlaneOrientation());
}
this.setCamera({
viewPlaneNormal,
viewUp,
});
this.initialViewUp = viewUp;
this.resetCamera();
}
/**
* Gets the blend mode for the volume viewport. If filterActorUIDs is provided,
* it will return the blend mode for the first matching actor. Otherwise, it returns
* the blend mode of the first actor.
*
* @param filterActorUIDs - Optional array of actor UIDs to filter by
* @returns The blend mode of the matched actor
*/
public getBlendMode(filterActorUIDs?: string[]): BlendModes {
const actorEntries = this.getActors();
const actorForBlend =
filterActorUIDs?.length > 0
? actorEntries.find((actorEntry) =>
filterActorUIDs.includes(actorEntry.uid)
)
: actorEntries[0];
return (
actorForBlend?.blendMode ||
// @ts-ignore vtk incorrect typing
actorForBlend?.actor.getMapper().getBlendMode()
);
}
/**
* Sets the blend mode for actors in the volume viewport. Can optionally filter which
* actors to apply the blend mode to using filterActorUIDs.
*
* @param blendMode - The blend mode to set
* @param filterActorUIDs - Optional array of actor UIDs to filter which actors to update
* @param immediate - Whether to render the viewport immediately after setting the blend mode
*/
public setBlendMode(
blendMode: BlendModes,
filterActorUIDs = [],
immediate = false
): void {
let actorEntries = this.getActors();
if (filterActorUIDs?.length > 0) {
actorEntries = actorEntries.filter((actorEntry: ActorEntry) => {
return filterActorUIDs.includes(actorEntry.uid);
});
}
actorEntries.forEach((actorEntry) => {
const { actor } = actorEntry;
const mapper = actor.getMapper();
// @ts-ignore vtk incorrect typing
mapper.setBlendMode?.(blendMode);
actorEntry.blendMode = blendMode;
});
if (immediate) {
this.render();
}
}
public resetCameraForResize = (): boolean => {
return this.resetCamera({
resetPan: true,
resetZoom: true,
resetToCenter: true,
resetRotation: false,
suppressEvents: true,
});
};
/**
* Reset the camera for the volume viewport
*/
public resetCamera(options?): boolean {
const {
resetPan = true,
resetZoom = true,
resetRotation = true,
resetToCenter = true,
suppressEvents = false,
resetOrientation = true,
} = options || {};
const { orientation } = this.viewportProperties;
if (orientation && resetOrientation) {
this.applyViewOrientation(orientation, false);
}
super.resetCamera({ resetPan, resetZoom, resetToCenter });
const activeCamera = this.getVtkActiveCamera();
const viewPlaneNormal = activeCamera.getViewPlaneNormal() as Point3;
const focalPoint = activeCamera.getFocalPoint() as Point3;
// always add clipping planes for the volume viewport. If a use case
// arises where we don't want clipping planes, you should use the volume_3d
// viewport instead.
const actorEntries = this.getActors();
actorEntries.forEach((actorEntry) => {
Iif (!actorEntry.actor) {
return;
}
const mapper = actorEntry.actor.getMapper() as vtkMapper;
const vtkPlanes = mapper.getClippingPlanes();
if (vtkPlanes.length === 0 && !actorEntry?.clippingFilter) {
const clipPlane1 = vtkPlane.newInstance();
const clipPlane2 = vtkPlane.newInstance();
const newVtkPlanes = [clipPlane1, clipPlane2];
let slabThickness = RENDERING_DEFAULTS.MINIMUM_SLAB_THICKNESS;
Iif (actorEntry.slabThickness) {
slabThickness = actorEntry.slabThickness;
}
this.setOrientationOfClippingPlanes(
newVtkPlanes,
slabThickness,
viewPlaneNormal,
focalPoint
);
mapper.addClippingPlane(clipPlane1);
mapper.addClippingPlane(clipPlane2);
}
});
//Only reset the rotation of the camera if wanted (so we don't reset every time resetCamera is called) and also verify that the viewport has an orientation that we know (sagittal, coronal, axial)
if (
resetRotation &&
MPR_CAMERA_VALUES[this.viewportProperties.orientation] !== undefined
) {
const viewToReset =
MPR_CAMERA_VALUES[this.viewportProperties.orientation];
this.setCameraNoEvent({
viewUp: viewToReset.viewUp,
viewPlaneNormal: viewToReset.viewPlaneNormal,
});
}
if (!suppressEvents) {
const eventDetail: EventTypes.CameraResetEventDetail = {
viewportId: this.id,
camera: this.getCamera(),
renderingEngineId: this.renderingEngineId,
element: this.element,
};
triggerEvent(this.element, Events.CAMERA_RESET, eventDetail);
}
return true;
}
/**
* It sets the slabThickness of the actors of the viewport. If filterActorUIDs are
* provided, only the actors with the given UIDs will be affected. If no
* filterActorUIDs are provided, all actors will be affected.
*
* @param slabThickness - The slab thickness to set.
* @param filterActorUIDs - Optional argument to filter the actors to apply
* the slab thickness to (if not provided, all actors will be affected).
*/
public setSlabThickness(slabThickness: number, filterActorUIDs = []): void {
if (slabThickness < 0.1) {
// Cannot render zero thickness
slabThickness = 0.1;
}
let actorEntries = this.getActors();
if (filterActorUIDs?.length > 0) {
actorEntries = actorEntries.filter((actorEntry) => {
return filterActorUIDs.includes(actorEntry.uid);
});
}
actorEntries.forEach((actorEntry) => {
if (actorIsA(actorEntry, 'vtkVolume')) {
actorEntry.slabThickness = slabThickness;
}
});
const currentCamera = this.getCamera();
this.updateClippingPlanesForActors(currentCamera);
// reset camera clipping range as well
this.triggerCameraModifiedEventIfNecessary(currentCamera, currentCamera);
this.viewportProperties.slabThickness = slabThickness;
}
/**
* Uses the origin and focalPoint to calculate the slice index.
* Resets the slab thickness of the actors of the viewport to the default value.
*/
public resetSlabThickness(): void {
const actorEntries = this.getActors();
actorEntries.forEach((actorEntry) => {
Eif (actorIsA(actorEntry, 'vtkVolume')) {
actorEntry.slabThickness = RENDERING_DEFAULTS.MINIMUM_SLAB_THICKNESS;
}
});
const currentCamera = this.getCamera();
this.updateClippingPlanesForActors(currentCamera);
this.triggerCameraModifiedEventIfNecessary(currentCamera, currentCamera);
this.viewportProperties.slabThickness = undefined;
}
public isInAcquisitionPlane(): boolean {
const imageData = this.getImageData();
if (!imageData) {
return false;
}
const { direction } = imageData;
const { viewPlaneNormal } = this.getCamera();
const normalDirection = [direction[6], direction[7], direction[8]];
const TOLERANCE = 0.99;
return (
Math.abs(vec3.dot(viewPlaneNormal, normalDirection as Point3)) > TOLERANCE
);
}
/**
* Uses the slice range information to compute the current image id index.
* Note that this may be offset from the origin location, or opposite in
* direction to the distance from the origin location, as the index is a
* complete index from minimum to maximum.
*
* @returns The slice index in the direction of the view. This index is in
* the same position/size/direction as the scroll utility. That is,
* ```scroll(dir)```
* and
* ```viewport.setView(viewport.getView({sliceIndex: viewport.getCurrentImageIdIndex()+dir}))```
*
* have the same affect, excluding end/looping conditions.
*/
public getCurrentImageIdIndex = (
volumeId?: string,
useSlabThickness = true
): number => {
const { currentStepIndex } = getVolumeViewportScrollInfo(
this,
volumeId || this.getVolumeId(),
useSlabThickness
);
return currentStepIndex;
};
/**
* Returns the image index associated with the volume viewport in the current view, the difference
* between this method and getCurrentImageIdIndex is that this method returns the index of the
* slice in the volume in view direction so at the top (scrollbar top) of the viewport the index
* will be 0 and at the bottom (scrollbar bottom) the index will be the number of slices - 1.
* But the getCurrentImageIdIndex returns the index of current image in the imageIds
* which is not guaranteed to be the same as the slice index in the view.
*
* @returns The image index.
*/
public getSliceIndex = (): number => {
const { imageIndex } = getImageSliceDataForVolumeViewport(this) || {};
return imageIndex;
};
/**
* Returns detailed information about the current slice view in the volume viewport.
* This method provides comprehensive data about the slice's position, orientation,
* and dimensions within the volume.
*
* @returns An object containing the following properties:
* @property sliceIndex - The current slice index in the view direction.
* @property slicePlane - The axis along which the slicing is performed (0 for X, 1 for Y, 2 for Z).
* @property width - The width of the slice in voxels.
* @property height - The height of the slice in voxels.
* @property sliceToIndexMatrix - A 4x4 matrix for transforming from slice coordinates to volume index coordinates.
* @property indexToSliceMatrix - A 4x4 matrix for transforming from volume index coordinates to slice coordinates.
*
* @throws {Error} If the view is oblique or if the slice axis cannot be determined.
*/
public getSliceViewInfo(): {
sliceIndex: number;
slicePlane: number;
width: number;
height: number;
sliceToIndexMatrix: mat4;
indexToSliceMatrix: mat4;
} {
const { width: canvasWidth, height: canvasHeight } = this.getCanvas();
// Get three points from the canvas to help us identify the orientation of
// the slice. Using canvas width/height to get point far away for each other
// because points such as (0,0), (1,0) and (0,1) may be converted to the same
// ijk index when the image is zoomed in.
const ijkOriginPoint = transformCanvasToIJK(this, [0, 0]);
const ijkRowPoint = transformCanvasToIJK(this, [canvasWidth - 1, 0]);
const ijkColPoint = transformCanvasToIJK(this, [0, canvasHeight - 1]);
// Subtract the points to get the row and column vectors in index space
const ijkRowVec = vec3.sub(vec3.create(), ijkRowPoint, ijkOriginPoint);
const ijkColVec = vec3.sub(vec3.create(), ijkColPoint, ijkOriginPoint);
const ijkSliceVec = vec3.cross(vec3.create(), ijkRowVec, ijkColVec);
vec3.normalize(ijkRowVec, ijkRowVec);
vec3.normalize(ijkColVec, ijkColVec);
vec3.normalize(ijkSliceVec, ijkSliceVec);
const { dimensions } = this.getImageData();
const [sx, sy, sz] = dimensions;
// All eight volume corners in index space
// prettier-ignore
const ijkCorners: Point3[] = [
[ 0, 0, 0], // top-left-front
[sx - 1, 0, 0], // top-right-front
[ 0, sy - 1, 0], // bottom-left-front
[sx - 1, sy - 1, 0], // bottom-right-front
[ 0, 0, sz - 1], // top-left-back
[sx - 1, 0, sz - 1], // top-right-back
[ 0, sy - 1, sz - 1], // bottom-left-back
[sx - 1, sy - 1, sz - 1], // bottom-right-back
];
// Project the volume corners onto the canvas
const canvasCorners = ijkCorners.map((ijkCorner) =>
transformIJKToCanvas(this, ijkCorner)
);
// Calculate the AABB from the corners project onto the canvas
const canvasAABB = canvasCorners.reduce(
(aabb, canvasPoint) => {
aabb.minX = Math.min(aabb.minX, canvasPoint[0]);
aabb.minY = Math.min(aabb.minY, canvasPoint[1]);
aabb.maxX = Math.max(aabb.maxX, canvasPoint[0]);
aabb.maxY = Math.max(aabb.maxY, canvasPoint[1]);
return aabb;
},
{ minX: Infinity, minY: Infinity, maxX: -Infinity, maxY: -Infinity }
);
// Get the top-left, bottom-right and the diagonal vector of
// the slice in index space
const ijkTopLeft = transformCanvasToIJK(this, [
canvasAABB.minX,
canvasAABB.minY,
]);
// prettier-ignore
const sliceToIndexMatrix = mat4.fromValues(
ijkRowVec[0], ijkRowVec[1], ijkRowVec[2], 0,
ijkColVec[0], ijkColVec[1], ijkColVec[2], 0,
ijkSliceVec[0], ijkSliceVec[1], ijkSliceVec[2], 0,
ijkTopLeft[0], ijkTopLeft[1], ijkTopLeft[2], 1
);
const ijkBottomRight = transformCanvasToIJK(this, [
canvasAABB.maxX,
canvasAABB.maxY,
]);
const ijkDiagonal = vec3.sub(vec3.create(), ijkBottomRight, ijkTopLeft);
const indexToSliceMatrix = mat4.invert(mat4.create(), sliceToIndexMatrix);
const { viewPlaneNormal } = this.getCamera();
// Check if the view is oblique
const isOblique =
viewPlaneNormal.filter((component) => Math.abs(component) > EPSILON)
.length > 1;
if (isOblique) {
throw new Error('getSliceInfo is not supported for oblique views');
}
// Find the primary axis
const sliceAxis = viewPlaneNormal.findIndex(
(component) => Math.abs(component) > 1 - EPSILON
);
if (sliceAxis === -1) {
throw new Error('Unable to determine slice axis');
}
// Dot the diagonal with row/column to find the image width/height
const sliceWidth = vec3.dot(ijkRowVec, ijkDiagonal) + 1;
const sliceHeight = vec3.dot(ijkColVec, ijkDiagonal) + 1;
return {
sliceIndex: this.getSliceIndex(),
width: sliceWidth,
height: sliceHeight,
slicePlane: sliceAxis,
sliceToIndexMatrix,
indexToSliceMatrix,
};
}
/**
* Retrieves the pixel data for the current slice being displayed in the viewport.
*
* Note: this method cannot return the oblique planes pixel data as they
* are interpolated in the gpu side
*
* @returns The pixel data for the current slice, which can be in any of the axial, sagittal
* or coronal directions
*
*/
public getCurrentSlicePixelData() {
const { voxelManager } = this.getImageData();
const sliceData = voxelManager.getSliceData(this.getSliceViewInfo());
return sliceData;
}
/**
* Uses viewport camera and volume actor to decide if the viewport
* is looking at the volume in the direction of acquisition (imageIds).
* If so, it uses the origin and focalPoint to find which imageId is
* currently being viewed.
*
* @returns ImageId
*/
public getCurrentImageId = (): string | undefined => {
const actorEntry = this.getDefaultActor();
Iif (!actorEntry || !actorIsA(actorEntry, 'vtkVolume')) {
return;
}
const volume = cache.getVolume(this.getVolumeId());
Iif (!volume) {
return;
}
const { viewPlaneNormal, focalPoint } = this.getCamera();
return getClosestImageId(volume, focalPoint, viewPlaneNormal);
};
/**
* Gets a view target, allowing comparison between view positions as well
* as restoring views later.
* Add the referenced image id.
*/
public getViewReference(
viewRefSpecifier: ViewReferenceSpecifier = {}
): ViewReference {
const viewRef = super.getViewReference(viewRefSpecifier);
Iif (!viewRef?.volumeId) {
return;
}
const volume = cache.getVolume(viewRef.volumeId);
viewRef.referencedImageId = getClosestImageId(
volume,
viewRef.cameraFocalPoint,
viewRef.viewPlaneNormal
);
return viewRef;
}
/**
* Reset the viewport properties to the default values
*
* @param volumeId - Optional volume ID to specify which volume properties to reset.
* If not provided, it will reset the properties of the default actor.
*
* @returns void
*/
public resetProperties(volumeId?: string): void {
this._resetProperties(volumeId);
}
private _resetProperties(volumeId?: string) {
// Get the actor based on the volumeId if provided, otherwise use the default actor.
const volumeActor = volumeId
? this.getActor(volumeId)
: this.getDefaultActor();
if (!volumeActor) {
throw new Error(`No actor found for the given volumeId: ${volumeId}`);
}
// if a custom slabThickness was set, we need to reset it
if (volumeActor.slabThickness) {
volumeActor.slabThickness = RENDERING_DEFAULTS.MINIMUM_SLAB_THICKNESS;
this.viewportProperties.slabThickness = undefined;
this.updateClippingPlanesForActors(this.getCamera());
}
volumeId ||= this.getVolumeId();
const imageVolume = cache.getVolume(volumeId);
if (!imageVolume) {
throw new Error(
`imageVolume with id: ${volumeId} does not exist in cache`
);
}
setDefaultVolumeVOI(volumeActor.actor as vtkVolume, imageVolume);
if (isImageActor(volumeActor)) {
const transferFunction = (volumeActor.actor as ImageActor)
.getProperty()
.getRGBTransferFunction(0);
setTransferFunctionNodes(
transferFunction,
this.initialTransferFunctionNodes
);
}
const eventDetails = {
...super.getVOIModifiedEventDetail(volumeId),
};
const resetPan = true;
const resetZoom = true;
const resetToCenter = true;
const resetCameraRotation = true;
this.resetCamera({
resetPan,
resetZoom,
resetToCenter,
resetCameraRotation,
});
triggerEvent(this.element, Events.VOI_MODIFIED, eventDetails);
}
/**
* Retrieves the clipping planes for the slices in the volume viewport.
* @returns An array of vtkPlane objects representing the clipping planes, or an array of objects with normal and origin properties if raw is true.
*/
getSlicesClippingPlanes(): {
sliceIndex: number;
planes: {
normal: Point3;
origin: Point3;
}[];
}[] {
const focalPoints = this.getSlicePlaneCoordinates();
const { viewPlaneNormal } = this.getCamera();
const slabThickness = RENDERING_DEFAULTS.MINIMUM_SLAB_THICKNESS;
return focalPoints.map(({ point, sliceIndex }) => {
const vtkPlanes = [vtkPlane.newInstance(), vtkPlane.newInstance()];
this.setOrientationOfClippingPlanes(
vtkPlanes,
slabThickness,
viewPlaneNormal,
point
);
return {
sliceIndex,
planes: vtkPlanes.map((plane) => ({
normal: plane.getNormal(),
origin: plane.getOrigin(),
})),
};
});
}
/**
* Returns an array of 3D coordinates representing the slice plane positions.
* It starts by the focal point as a reference point on the current slice that
* the camera is looking at, and then it calculates the slice plane positions
* by moving the focal point in the direction of the view plane normal back and
* forward, and snaps them to the slice.
*
* @returns An array of Point3 representing the slice plane coordinates.
*/
public getSlicePlaneCoordinates = (): {
sliceIndex: number;
point: Point3;
}[] => {
const actorEntry = this.getDefaultActor();
if (!actorEntry?.actor) {
console.warn('No image data found for calculating vtkPlanes.');
return [];
}
const volumeId = this.getVolumeId();
const imageVolume = cache.getVolume(volumeId);
const camera = this.getCamera();
const { focalPoint, position, viewPlaneNormal } = camera;
const spacingInNormalDirection = getSpacingInNormalDirection(
imageVolume,
viewPlaneNormal
);
const sliceRange = getSliceRange(
actorEntry.actor as vtkVolume,
viewPlaneNormal,
focalPoint
);
// calculate the number of slices that is possible to visit
// in the direction of the view back and forward
const numSlicesBackward = Math.round(
(sliceRange.current - sliceRange.min) / spacingInNormalDirection
);
const numSlicesForward = Math.round(
(sliceRange.max - sliceRange.current) / spacingInNormalDirection
);
const currentSliceIndex = this.getSliceIndex();
const focalPoints = [];
for (let i = -numSlicesBackward; i <= numSlicesForward; i++) {
const { newFocalPoint: point } = snapFocalPointToSlice(
focalPoint,
position,
sliceRange,
viewPlaneNormal,
spacingInNormalDirection,
i
);
focalPoints.push({ sliceIndex: currentSliceIndex + i, point });
}
return focalPoints;
};
}
export default VolumeViewport;
|