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| 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 | 428x 428x | import type { Types } from '@cornerstonejs/core';
import { getEnabledElement, utilities as csUtils } from '@cornerstonejs/core';
import type { ContourSegmentationAnnotation } from '../../types/ContourSegmentationAnnotation';
import { ContourWindingDirection } from '../../types/ContourAnnotation';
import * as math from '../math';
import updateContourPolyline from '../contours/updateContourPolyline';
import {
addAnnotation,
removeAnnotation,
getChildAnnotations,
addChildAnnotation,
clearParentAnnotation,
} from '../../stateManagement/annotation/annotationState';
import { addContourSegmentationAnnotation } from './addContourSegmentationAnnotation';
import { removeContourSegmentationAnnotation } from './removeContourSegmentationAnnotation';
import { triggerAnnotationModified } from '../../stateManagement/annotation/helpers/state';
import triggerAnnotationRenderForViewportIds from '../triggerAnnotationRenderForViewportIds';
import { getViewportIdsWithToolToRender } from '../viewportFilters';
import { hasToolByName } from '../../store/addTool';
const TOLERANCE = 1e-10; // Very small tolerance for floating point comparison
/**
* Default tool name for contour segmentation operations.
*/
const DEFAULT_CONTOUR_SEG_TOOL_NAME = 'PlanarFreehandContourSegmentationTool';
/**
* Converts a 3D polyline (in world coordinates) to a 2D polyline (in canvas space)
* for a specific viewport.
*/
export 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;
}
/**
* Converts a 2D polyline (in canvas space) to a 3D polyline (in world coordinates)
* for a specific viewport.
*/
export function convertContourPolylineToWorld(
polyline: Types.Point2[],
viewport: Types.IViewport
): Types.Point3[] {
const numPoints = polyline.length;
const projectedPolyline = new Array(numPoints);
for (let i = 0; i < numPoints; i++) {
projectedPolyline[i] = viewport.canvasToWorld(polyline[i]);
}
return projectedPolyline;
}
/**
* Checks if two polylines intersect and determines the type of intersection
*/
export function checkIntersection(
sourcePolyline: Types.Point2[],
targetPolyline: Types.Point2[]
): {
hasIntersection: boolean;
isContourHole: boolean;
} {
const sourceAABB = math.polyline.getAABB(sourcePolyline);
const targetAABB = math.polyline.getAABB(targetPolyline);
const aabbIntersect = math.aabb.intersectAABB(sourceAABB, targetAABB);
if (!aabbIntersect) {
return { hasIntersection: false, isContourHole: false };
}
const lineSegmentsIntersect = math.polyline.intersectPolyline(
sourcePolyline,
targetPolyline
);
// A contour hole is when AABBs intersect, polylines don't intersect, and source is inside target
const isContourHole =
!lineSegmentsIntersect &&
math.polyline.containsPoints(targetPolyline, sourcePolyline);
const hasIntersection = lineSegmentsIntersect || isContourHole;
return { hasIntersection, isContourHole };
}
/**
* Retrieves data for all holes (child annotations) of a given contour segmentation.
*/
export function getContourHolesData(
viewport: Types.IViewport,
annotation: ContourSegmentationAnnotation
): Array<{
annotation: ContourSegmentationAnnotation;
polyline: Types.Point2[];
}> {
return getChildAnnotations(annotation).map((holeAnnotation) => {
const contourHoleAnnotation =
holeAnnotation as ContourSegmentationAnnotation;
const polyline = convertContourPolylineToCanvasSpace(
contourHoleAnnotation.data.contour.polyline,
viewport
);
return { annotation: contourHoleAnnotation, polyline };
});
}
/**
* Configures `holeAnnotation` to act as a hole within `targetAnnotation`.
*/
export function createPolylineHole(
viewport: Types.IViewport,
targetAnnotation: ContourSegmentationAnnotation,
holeAnnotation: ContourSegmentationAnnotation
): void {
// Add holeAnnotation as a child to targetAnnotation
addChildAnnotation(targetAnnotation, holeAnnotation);
// Remove holeAnnotation from the top-level contour segmentation list
removeContourSegmentationAnnotation(holeAnnotation);
const { contour: holeContour } = holeAnnotation.data;
const holePolylineCanvas = convertContourPolylineToCanvasSpace(
holeContour.polyline,
viewport
);
// Update the hole's polyline and winding direction
updateContourPolyline(
holeAnnotation,
{
points: holePolylineCanvas,
closed: holeContour.closed,
targetWindingDirection:
targetAnnotation.data.contour.windingDirection ===
ContourWindingDirection.Clockwise
? ContourWindingDirection.CounterClockwise
: ContourWindingDirection.Clockwise,
},
viewport
);
const { element } = viewport;
updateViewportsForAnnotations(viewport, [targetAnnotation, holeAnnotation]);
}
/**
* Combines a source polyline with a target polyline using merge or subtract operations.
*/
export function combinePolylines(
viewport: Types.IViewport,
targetAnnotation: ContourSegmentationAnnotation,
targetPolyline: Types.Point2[],
sourceAnnotation: ContourSegmentationAnnotation,
sourcePolyline: Types.Point2[]
): void {
// Check if the necessary tool for creating new combined contours is registered.
if (!hasToolByName(DEFAULT_CONTOUR_SEG_TOOL_NAME)) {
console.warn(
`${DEFAULT_CONTOUR_SEG_TOOL_NAME} is not registered in cornerstone. Cannot combine polylines.`
);
return;
}
const sourceStartPoint = sourcePolyline[0];
// Determine if the operation should be a merge (union) or subtraction
const mergePolylines = math.polyline.containsPoint(
targetPolyline,
sourceStartPoint
);
const contourHolesData = getContourHolesData(viewport, targetAnnotation);
const unassignedContourHolesSet = new Set(contourHolesData);
const reassignedContourHolesMap = new Map<
Types.Point2[],
typeof contourHolesData
>();
/** Helper to assign a hole to a new parent polyline. */
const assignHoleToPolyline = (
parentPolyline: Types.Point2[],
holeData: (typeof contourHolesData)[0]
) => {
let holes = reassignedContourHolesMap.get(parentPolyline);
if (!holes) {
holes = [];
reassignedContourHolesMap.set(parentPolyline, holes);
}
holes.push(holeData);
unassignedContourHolesSet.delete(holeData);
};
const newPolylines: Types.Point2[][] = [];
if (mergePolylines) {
const mergedPolyline = math.polyline.mergePolylines(
targetPolyline,
sourcePolyline
);
newPolylines.push(mergedPolyline);
// When merging, all existing holes remain inside the new merged contour
Array.from(unassignedContourHolesSet.keys()).forEach((holeData) =>
assignHoleToPolyline(mergedPolyline, holeData)
);
} else {
// Subtract polylines
const subtractedPolylines = math.polyline.subtractPolylines(
targetPolyline,
sourcePolyline
);
subtractedPolylines.forEach((newPolyline) => {
newPolylines.push(newPolyline);
// Reassign existing holes to the new polyline(s) if they are contained within
Array.from(unassignedContourHolesSet.keys()).forEach((holeData) => {
const containsHole = math.polyline.containsPoints(
newPolyline,
holeData.polyline
);
if (containsHole) {
assignHoleToPolyline(newPolyline, holeData);
}
});
});
}
// Detach holes from the old targetAnnotation before it's deleted
Array.from(reassignedContourHolesMap.values()).forEach(
(contourHolesDataArray) =>
contourHolesDataArray.forEach((contourHoleData) =>
clearParentAnnotation(contourHoleData.annotation)
)
);
const { element } = viewport;
const { metadata, data } = targetAnnotation;
const { handles, segmentation } = data;
const { textBox } = handles;
// Remove original annotations
removeAnnotation(sourceAnnotation.annotationUID);
removeAnnotation(targetAnnotation.annotationUID);
removeContourSegmentationAnnotation(sourceAnnotation);
removeContourSegmentationAnnotation(targetAnnotation);
// Create new annotations from result polylines
const newAnnotations: ContourSegmentationAnnotation[] = [];
for (let i = 0; i < newPolylines.length; i++) {
const polyline = newPolylines[i];
if (!polyline || polyline.length < 3) {
console.warn(
'Skipping creation of new annotation due to invalid polyline:',
polyline
);
continue;
}
const newAnnotation = createNewAnnotationFromPolyline(
viewport,
targetAnnotation,
polyline
);
addAnnotation(newAnnotation, element);
addContourSegmentationAnnotation(newAnnotation);
triggerAnnotationModified(newAnnotation, viewport.element);
newAnnotations.push(newAnnotation);
// Add re-assigned holes as children to this new annotation
reassignedContourHolesMap
.get(polyline)
?.forEach((holeData) =>
addChildAnnotation(newAnnotation, holeData.annotation)
);
}
updateViewportsForAnnotations(viewport, [targetAnnotation, sourceAnnotation]);
}
/**
* Creates a new annotation from a polyline, copying metadata from a template annotation.
*/
export function createNewAnnotationFromPolyline(
viewport: Types.IViewport,
templateAnnotation: ContourSegmentationAnnotation,
polyline: Types.Point2[]
): ContourSegmentationAnnotation {
const startPointWorld = viewport.canvasToWorld(polyline[0]);
const endPointWorld = viewport.canvasToWorld(polyline[polyline.length - 1]);
const newAnnotation: ContourSegmentationAnnotation = {
metadata: {
...templateAnnotation.metadata,
toolName: DEFAULT_CONTOUR_SEG_TOOL_NAME,
originalToolName:
templateAnnotation.metadata.originalToolName ||
templateAnnotation.metadata.toolName,
},
data: {
cachedStats: {},
handles: {
points: [startPointWorld, endPointWorld],
textBox: templateAnnotation.data.handles.textBox
? { ...templateAnnotation.data.handles.textBox }
: undefined,
},
contour: {
polyline: [],
closed: true,
},
spline: templateAnnotation.data.spline,
segmentation: {
...templateAnnotation.data.segmentation,
},
},
annotationUID: csUtils.uuidv4() as string,
highlighted: true,
invalidated: true,
isLocked: false,
isVisible: undefined,
interpolationUID: templateAnnotation.interpolationUID,
interpolationCompleted: templateAnnotation.interpolationCompleted,
};
updateContourPolyline(
newAnnotation,
{
points: polyline,
closed: true,
targetWindingDirection: ContourWindingDirection.Clockwise,
},
viewport
);
return newAnnotation;
}
/**
* Updates viewports for multiple annotations.
*/
export function updateViewportsForAnnotations(
viewport: Types.IViewport,
annotations: ContourSegmentationAnnotation[]
): void {
const { element } = viewport;
const updatedToolNames = new Set([DEFAULT_CONTOUR_SEG_TOOL_NAME]);
annotations.forEach((annotation) => {
updatedToolNames.add(annotation.metadata.toolName);
});
for (const toolName of updatedToolNames.values()) {
if (hasToolByName(toolName)) {
const viewportIdsToRender = getViewportIdsWithToolToRender(
element,
toolName
);
triggerAnnotationRenderForViewportIds(viewportIdsToRender);
}
}
}
/**
* Remove consecutive duplicate points from a polyline
* @param polyline - Polyline to clean
* @returns Cleaned polyline without consecutive duplicates
*/
export function removeDuplicatePoints(
polyline: Types.Point2[]
): Types.Point2[] {
if (!polyline || polyline.length < 2) {
return polyline;
}
const cleaned: Types.Point2[] = [polyline[0]]; // Always keep the first point
for (let i = 1; i < polyline.length; i++) {
const currentPoint = polyline[i];
const lastPoint = cleaned[cleaned.length - 1];
// Check if current point is different from the last added point
const dx = Math.abs(currentPoint[0] - lastPoint[0]);
const dy = Math.abs(currentPoint[1] - lastPoint[1]);
if (dx > TOLERANCE || dy > TOLERANCE) {
cleaned.push(currentPoint);
}
}
return cleaned;
}
/**
* Helper function to clean up polylines by removing duplicates and invalid polylines
* @param polylines - Array of polylines to clean up
* @returns Cleaned array of polylines
*/
export function cleanupPolylines(
polylines: Types.Point2[][]
): Types.Point2[][] {
const validPolylines: Types.Point2[][] = [];
const seenPolylines = new Set<string>();
for (let polyline of polylines) {
// Skip invalid polylines
if (!polyline || polyline.length < 3) {
continue;
}
// Remove consecutive duplicate points
polyline = removeDuplicatePoints(polyline);
// Skip if after cleanup it's too small
if (polyline.length < 3) {
continue;
}
// Create a string representation for duplicate detection
// Sort points to handle polylines that are the same but start from different points
const sortedPoints = [...polyline].sort((a, b) => {
if (a[0] !== b[0]) {
return a[0] - b[0];
}
return a[1] - b[1];
});
const polylineKey = sortedPoints
.map((p) => `${p[0].toFixed(6)},${p[1].toFixed(6)}`)
.join('|');
if (!seenPolylines.has(polylineKey)) {
seenPolylines.add(polylineKey);
validPolylines.push(polyline);
}
}
return validPolylines;
}
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