5dbcebf7a2
- Fix router import path in main.js - Handle Django REST Framework pagination format in API calls - Add getTemplates function to project API - Restart frontend development server
51 lines
1.3 KiB
TypeScript
51 lines
1.3 KiB
TypeScript
import type { FabricObject, Point } from 'fabric';
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import type { PointMap } from '../typedefs';
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export function getDistance(a: number, b: number) {
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return Math.abs(a - b);
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}
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export function getDistanceList(point: Point, list: Point[], type: 'x' | 'y') {
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let dis = Infinity;
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let arr: Point[] = [];
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for (const item of list) {
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const v = getDistance(point[type], item[type]);
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if (dis > v) {
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arr = [];
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dis = v;
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}
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if (dis == v) {
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arr.push(item);
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}
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}
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return { dis, arr };
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}
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export function getPointMap(target: FabricObject): PointMap {
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const coords = target.getCoords();
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return {
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tl: coords[0],
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tr: coords[1],
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br: coords[2],
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bl: coords[3],
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mt: coords[0].add(coords[1]).scalarDivide(2),
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mr: coords[1].add(coords[2]).scalarDivide(2),
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mb: coords[2].add(coords[3]).scalarDivide(2),
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ml: coords[3].add(coords[0]).scalarDivide(2),
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};
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}
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export function getContraryMap(target: FabricObject): PointMap {
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const aCoords = target.aCoords ?? target.calcACoords();
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return {
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tl: aCoords.br,
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tr: aCoords.bl,
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br: aCoords.tl,
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bl: aCoords.tr,
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mt: aCoords.br.add(aCoords.bl).scalarDivide(2),
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mr: aCoords.bl.add(aCoords.tl).scalarDivide(2),
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mb: aCoords.tl.add(aCoords.tr).scalarDivide(2),
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ml: aCoords.tr.add(aCoords.br).scalarDivide(2),
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};
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}
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