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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 | 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 36x 36x 36x 21x 9x | import type { Types } from '@cornerstonejs/core';
import * as lineSegment from '../line';
type rectLineSegments = {
top: Types.Point2[];
right: Types.Point2[];
bottom: Types.Point2[];
left: Types.Point2[];
};
/**
* Given a rectangle left, top, width and height, return an object containing the
* line segments that make up the rectangle's four sides
* @param left - The x-coordinate of the left edge of the rectangle.
* @param top - The y-coordinate of the top edge of the rectangle.
* @param width - The width of the rectangle.
* @param height - The height of the rectangle.
* @returns An object with four keys, each of which contains an array of two
* points.
*/
function rectToLineSegments(
left: number,
top: number,
width: number,
height: number
): rectLineSegments {
const topLineStart: Types.Point2 = [left, top];
const topLineEnd: Types.Point2 = [left + width, top];
const rightLineStart: Types.Point2 = [left + width, top];
const rightLineEnd: Types.Point2 = [left + width, top + height];
const bottomLineStart: Types.Point2 = [left + width, top + height];
const bottomLineEnd: Types.Point2 = [left, top + height];
const leftLineStart: Types.Point2 = [left, top + height];
const leftLineEnd: Types.Point2 = [left, top];
const lineSegments = {
top: [topLineStart, topLineEnd],
right: [rightLineStart, rightLineEnd],
bottom: [bottomLineStart, bottomLineEnd],
left: [leftLineStart, leftLineEnd],
};
return lineSegments;
}
/**
* Calculates distance of the point to the rectangle. It calculates the minimum
* distance between the point and each line segment of the rectangle.
*
* @param rect - coordinates of the rectangle [left, top, width, height]
* @param point - [x,y] coordinates of a point
* @returns
*/
export default function distanceToPoint(
rect: number[],
point: Types.Point2
): number {
Iif (rect.length !== 4 || point.length !== 2) {
throw Error(
'rectangle:[left, top, width, height] or point: [x,y] not defined correctly'
);
}
const [left, top, width, height] = rect;
let minDistance = 655535;
const lineSegments = rectToLineSegments(left, top, width, height);
Object.keys(lineSegments).forEach((segment) => {
const [lineStart, lineEnd] = lineSegments[segment];
const distance = lineSegment.distanceToPoint(lineStart, lineEnd, point);
if (distance < minDistance) {
minDistance = distance;
}
});
return minDistance;
}
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