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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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1280x 2x 2x 2x 2x | import { utilities as csUtils } from '@cornerstonejs/core';
import { Types } from '@cornerstonejs/core';
import type { ContourAnnotation } from '../../types';
import type { ContourWindingDirection } from '../../types/ContourAnnotation';
import * as math from '../math';
import {
getParentAnnotation,
invalidateAnnotation,
} from '../../stateManagement';
/**
* Update the contour polyline data
* @param annotation - Contour annotation
* @param viewport - Viewport
* @param polylineData - Polyline data (points, winding direction and closed)
* @param transforms - Methods to convert points to/from canvas and world spaces
* @param options - Options
* - decimate: allow to set some parameters to decimate the polyline reducing
* the amount of points stored which also affects how fast it will draw the
* annotation in a viewport, compute the winding direction, append/remove
* contours and create holes. A higher `epsilon` value results in a polyline
* with less points.
*/
export default function updateContourPolyline(
annotation: ContourAnnotation,
polylineData: {
points: Types.Point2[];
closed?: boolean;
targetWindingDirection?: ContourWindingDirection;
},
transforms: {
canvasToWorld: (point: Types.Point2) => Types.Point3;
},
options?: {
decimate?: {
enabled?: boolean;
epsilon?: number;
};
}
) {
const { canvasToWorld } = transforms;
const { data } = annotation;
const { targetWindingDirection } = polylineData;
let { points: polyline } = polylineData;
// Decimate the polyline to reduce tha amount of points
Iif (options?.decimate?.enabled) {
polyline = math.polyline.decimate(
polylineData.points,
options?.decimate?.epsilon
);
}
let { closed } = polylineData;
const numPoints = polyline.length;
const polylineWorldPoints = new Array(numPoints);
const currentWindingDirection = math.polyline.getWindingDirection(polyline);
const parentAnnotation = getParentAnnotation(annotation) as ContourAnnotation;
Iif (closed === undefined) {
let currentClosedState = false;
// With two points it is just a line and do not make sense to consider it closed
if (polyline.length > 3) {
const lastToFirstDist = math.point.distanceToPointSquared(
polyline[0],
polyline[numPoints - 1]
);
currentClosedState = csUtils.isEqual(0, lastToFirstDist);
}
closed = currentClosedState;
}
// It must be in the opposite direction if it is a child annotation (hole)
let windingDirection = parentAnnotation
? parentAnnotation.data.contour.windingDirection * -1
: targetWindingDirection;
Iif (windingDirection === undefined) {
windingDirection = currentWindingDirection;
} else Eif (windingDirection !== currentWindingDirection) {
polyline.reverse();
}
for (let i = 0; i < numPoints; i++) {
polylineWorldPoints[i] = canvasToWorld(polyline[i]);
}
data.contour.polyline = polylineWorldPoints;
data.contour.closed = closed;
data.contour.windingDirection = windingDirection;
invalidateAnnotation(annotation);
}
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