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getEnabledElement,
utilities as csUtils,
Types,
} from '@cornerstonejs/core';
import { ContourSegmentationAnnotation } from '../../../types/ContourSegmentationAnnotation';
import getViewportsForAnnotation from '../../../utilities/getViewportsForAnnotation';
import {
math,
triggerAnnotationRenderForViewportIds,
} from '../../../utilities';
import { getViewportIdsWithToolToRender } from '../../../utilities/viewportFilters';
import {
addAnnotation,
removeAnnotation,
getAllAnnotations,
getChildAnnotations,
addChildAnnotation,
clearParentAnnotation,
} from '../../../stateManagement/annotation/annotationState';
import {
AnnotationCompletedEventType,
ContourAnnotationCompletedEventDetail,
} from '../../../types/EventTypes';
import * as contourUtils from '../../../utilities/contours';
import * as contourSegUtils from '../../../utilities/contourSegmentation';
import { ToolGroupManager, hasTool as cstHasTool } from '../../../store';
import { PlanarFreehandContourSegmentationTool } from '../../../tools';
import type { Annotation } from '../../../types';
import type { ContourAnnotation } from '../../../types/ContourAnnotation';
import { ContourWindingDirection } from '../../../types/ContourAnnotation';
import { triggerAnnotationModified } from '../../../stateManagement/annotation/helpers/state';
const DEFAULT_CONTOUR_SEG_TOOLNAME = 'PlanarFreehandContourSegmentationTool';
export default async function contourSegmentationCompletedListener(
evt: AnnotationCompletedEventType
) {
const sourceAnnotation = evt.detail
.annotation as ContourSegmentationAnnotation;
Iif (!contourSegUtils.isContourSegmentationAnnotation(sourceAnnotation)) {
return;
}
const viewport = getViewport(sourceAnnotation);
const contourSegmentationAnnotations = getValidContourSegmentationAnnotations(
viewport,
sourceAnnotation
);
if (!contourSegmentationAnnotations.length) {
return;
}
const sourcePolyline = convertContourPolylineToCanvasSpace(
sourceAnnotation.data.contour.polyline,
viewport
);
const targetAnnotationInfo = findIntersectingContour(
viewport,
sourcePolyline,
contourSegmentationAnnotations
);
Eif (!targetAnnotationInfo) {
return;
}
const { targetAnnotation, targetPolyline, isContourHole } =
targetAnnotationInfo;
if (isContourHole) {
const { contourHoleProcessingEnabled = false } =
evt.detail as ContourAnnotationCompletedEventDetail;
// Do not create holes when contourHoleProcessingEnabled is `false`
if (!contourHoleProcessingEnabled) {
return;
}
createPolylineHole(viewport, targetAnnotation, sourceAnnotation);
} else {
combinePolylines(
viewport,
targetAnnotation,
targetPolyline,
sourceAnnotation,
sourcePolyline
);
}
}
function isFreehandContourSegToolRegisteredForViewport(
viewport: Types.IViewport,
silent = false
) {
const { toolName } = PlanarFreehandContourSegmentationTool;
const toolGroup = ToolGroupManager.getToolGroupForViewport(
viewport.id,
viewport.renderingEngineId
);
let errorMessage;
Iif (!toolGroup.hasTool(toolName)) {
errorMessage = `Tool ${toolName} not added to ${toolGroup.id} toolGroup`;
} else Iif (!toolGroup.getToolOptions(toolName)) {
errorMessage = `Tool ${toolName} must be in active/passive state`;
}
Iif (errorMessage && !silent) {
console.warn(errorMessage);
}
return !errorMessage;
}
function getViewport(annotation: Annotation) {
const viewports = getViewportsForAnnotation(annotation);
const viewportWithToolRegistered = viewports.find((viewport) =>
isFreehandContourSegToolRegisteredForViewport(viewport, true)
);
// Returns the first viewport even if freehand contour segmentation is not
// registered because it can be used to project the polyline to create holes.
// Another verification is done before appending/removing contours which is
// possible only when the tool is registered.
return viewportWithToolRegistered ?? viewports[0];
}
function convertContourPolylineToCanvasSpace(
polyline: Types.Point3[],
viewport: Types.IViewport
): Types.Point2[] {
const numPoints = polyline.length;
const projectedPolyline = new Array(numPoints);
for (let i = 0; i < numPoints; i++) {
projectedPolyline[i] = viewport.worldToCanvas(polyline[i]);
}
return projectedPolyline;
}
function getValidContourSegmentationAnnotations(
viewport: Types.IViewport,
sourceAnnotation: ContourSegmentationAnnotation
): ContourSegmentationAnnotation[] {
const { annotationUID: sourceAnnotationUID } = sourceAnnotation;
// Get all annotations and filter all contour segmentations locally
const allAnnotations = getAllAnnotations();
return allAnnotations.filter(
(targetAnnotation) =>
targetAnnotation.annotationUID &&
targetAnnotation.annotationUID !== sourceAnnotationUID &&
contourSegUtils.isContourSegmentationAnnotation(targetAnnotation) &&
contourSegUtils.areSameSegment(targetAnnotation, sourceAnnotation) &&
viewport.isReferenceViewable(targetAnnotation.metadata)
) as ContourSegmentationAnnotation[];
}
/**
* Finds other contours on the same slice which intersect the source polyline,
* represented as canvas points.
*/
function findIntersectingContour(
viewport: Types.IViewport,
sourcePolyline: Types.Point2[],
contourSegmentationAnnotations: ContourSegmentationAnnotation[]
): {
targetAnnotation: ContourSegmentationAnnotation;
targetPolyline: Types.Point2[];
isContourHole: boolean;
} {
const sourceAABB = math.polyline.getAABB(sourcePolyline);
for (let i = 0; i < contourSegmentationAnnotations.length; i++) {
const targetAnnotation = contourSegmentationAnnotations[i];
const targetPolyline = convertContourPolylineToCanvasSpace(
targetAnnotation.data.contour.polyline,
viewport
);
const targetAABB = math.polyline.getAABB(targetPolyline);
const aabbIntersect = math.aabb.intersectAABB(sourceAABB, targetAABB);
const lineSegmentsIntersect =
aabbIntersect &&
math.polyline.intersectPolyline(sourcePolyline, targetPolyline);
const isContourHole =
aabbIntersect &&
!lineSegmentsIntersect &&
math.polyline.containsPoints(targetPolyline, sourcePolyline);
Iif (lineSegmentsIntersect || isContourHole) {
return { targetAnnotation, targetPolyline, isContourHole };
}
}
}
/**
* Modifies the holeAnnotation to work as a contour hole in the targetAnnotation,
* displayed on the given viewport.
*/
export function createPolylineHole(
viewport: Types.IViewport,
targetAnnotation: ContourSegmentationAnnotation,
holeAnnotation: ContourSegmentationAnnotation
) {
const { windingDirection: targetWindingDirection } =
targetAnnotation.data.contour;
const { windingDirection: holeWindingDirection } =
holeAnnotation.data.contour;
addChildAnnotation(targetAnnotation, holeAnnotation);
contourSegUtils.removeContourSegmentationAnnotation(holeAnnotation);
const { contour: holeContour } = holeAnnotation.data;
const holePolyline = convertContourPolylineToCanvasSpace(
holeContour.polyline,
viewport
);
// Calling `updateContourPolyline` method instead of reversing the polyline
// locally because it is also responsible for checking/fixing the winding direction.
contourUtils.updateContourPolyline(
holeAnnotation,
{
points: holePolyline,
closed: holeContour.closed,
},
viewport
);
const { element } = viewport;
const enabledElement = getEnabledElement(element);
const { renderingEngine } = enabledElement;
// Updating a Spline contours, for example, should also update freehand contours
const updatedToolNames = new Set([
DEFAULT_CONTOUR_SEG_TOOLNAME,
targetAnnotation.metadata.toolName,
holeAnnotation.metadata.toolName,
]);
for (const toolName of updatedToolNames.values()) {
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
toolName
);
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
}
}
function getContourHolesData(
viewport: Types.IViewport,
annotation: ContourAnnotation
) {
return getChildAnnotations(annotation).map((holeAnnotation) => {
const polyline = convertContourPolylineToCanvasSpace(
holeAnnotation.data.contour.polyline,
viewport
);
return { annotation: holeAnnotation, polyline };
});
}
function combinePolylines(
viewport: Types.IViewport,
targetAnnotation: ContourSegmentationAnnotation,
targetPolyline: Types.Point2[],
sourceAnnotation: ContourSegmentationAnnotation,
sourcePolyline: Types.Point2[]
) {
if (!cstHasTool(PlanarFreehandContourSegmentationTool)) {
console.warn(
`${PlanarFreehandContourSegmentationTool.toolName} is not registered in cornerstone`
);
return;
}
// Cannot append/remove an annotation if it will not be available on any viewport
if (!isFreehandContourSegToolRegisteredForViewport(viewport)) {
return;
}
const sourceStartPoint = sourcePolyline[0];
const mergePolylines = math.polyline.containsPoint(
targetPolyline,
sourceStartPoint
);
const contourHolesData = getContourHolesData(viewport, targetAnnotation);
const unassignedContourHolesSet = new Set(contourHolesData);
const reassignedContourHolesMap = new Map();
const assignHoleToPolyline = (parentPolyline, holeData) => {
let holes = reassignedContourHolesMap.get(parentPolyline);
if (!holes) {
holes = [];
reassignedContourHolesMap.set(parentPolyline, holes);
}
holes.push(holeData);
unassignedContourHolesSet.delete(holeData);
};
const newPolylines = [];
if (mergePolylines) {
const mergedPolyline = math.polyline.mergePolylines(
targetPolyline,
sourcePolyline
);
newPolylines.push(mergedPolyline);
// Keep all holes because the contour can only grow when merging and there
// is no chance for any hole to be removed
Array.from(unassignedContourHolesSet.keys()).forEach((holeData) =>
assignHoleToPolyline(mergedPolyline, holeData)
);
} else {
const subtractedPolylines = math.polyline.subtractPolylines(
targetPolyline,
sourcePolyline
);
subtractedPolylines.forEach((newPolyline) => {
newPolylines.push(newPolyline);
Array.from(unassignedContourHolesSet.keys()).forEach((holeData) => {
const containsHole = math.polyline.containsPoints(
newPolyline,
holeData.polyline
);
if (containsHole) {
assignHoleToPolyline(newPolyline, holeData);
unassignedContourHolesSet.delete(holeData);
}
});
});
}
// Make sure the holes that will be added to the new annotation are not
// associated to the target annotation that will be deleted
Array.from(reassignedContourHolesMap.values()).forEach(
(contourHolesDataArray) =>
contourHolesDataArray.forEach((contourHoleData) =>
clearParentAnnotation(contourHoleData.annotation)
)
);
const { element } = viewport;
const enabledElement = getEnabledElement(element);
const { metadata, data } = targetAnnotation;
const { handles, segmentation } = data;
const { textBox } = handles;
removeAnnotation(sourceAnnotation.annotationUID);
removeAnnotation(targetAnnotation.annotationUID);
for (let i = 0; i < newPolylines.length; i++) {
const polyline = newPolylines[i];
const startPoint = viewport.canvasToWorld(polyline[0]);
const endPoint = viewport.canvasToWorld(polyline[polyline.length - 1]);
const newAnnotation: ContourSegmentationAnnotation = {
metadata: {
...metadata,
toolName: DEFAULT_CONTOUR_SEG_TOOLNAME,
originalToolName: metadata.originalToolName || metadata.toolName,
},
data: {
cachedStats: {},
handles: {
points: [startPoint, endPoint],
textBox: textBox ? { ...textBox } : undefined,
},
contour: {
polyline: [],
closed: true,
},
spline: targetAnnotation.data.spline,
segmentation: {
...segmentation,
},
},
annotationUID: csUtils.uuidv4() as string,
highlighted: true,
invalidated: true,
isLocked: false,
isVisible: undefined,
// Allow this object to be interpolated against the original interpolation
// data.
interpolationUID: targetAnnotation.interpolationUID,
interpolationCompleted: targetAnnotation.interpolationCompleted,
};
// Calling `updateContourPolyline` method instead of setting it locally
// because it is also responsible for checking/fixing the winding direction.
contourUtils.updateContourPolyline(
newAnnotation,
{
points: polyline,
closed: true,
targetWindingDirection: ContourWindingDirection.Clockwise,
},
viewport
);
addAnnotation(newAnnotation, element);
contourSegUtils.addContourSegmentationAnnotation(newAnnotation);
triggerAnnotationModified(newAnnotation, viewport.element);
reassignedContourHolesMap
.get(polyline)
?.forEach((holeData) =>
addChildAnnotation(newAnnotation, holeData.annotation)
);
}
updateViewports(enabledElement, targetAnnotation, sourceAnnotation);
}
function updateViewports(enabledElement, targetAnnotation, sourceAnnotation) {
const { viewport } = enabledElement;
const { element } = viewport;
const { renderingEngine } = enabledElement;
const updatedTtoolNames = new Set([
DEFAULT_CONTOUR_SEG_TOOLNAME,
targetAnnotation.metadata.toolName,
sourceAnnotation.metadata.toolName,
]);
for (const toolName of updatedTtoolNames.values()) {
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
toolName
);
triggerAnnotationRenderForViewportIds(renderingEngine, viewportIdsToRender);
}
return new Promise((resolve) => window.requestAnimationFrame(resolve));
}
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