kopia lustrzana https://github.com/Tldraw/Tldraw
85 wiersze
1.8 KiB
TypeScript
85 wiersze
1.8 KiB
TypeScript
import { Bounds } from "types"
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import {
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intersectPolygonBounds,
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intersectPolylineBounds,
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} from "./intersections"
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/**
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* Get whether two bounds collide.
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* @param a Bounds
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* @param b Bounds
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* @returns
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*/
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export function boundsCollide(a: Bounds, b: Bounds) {
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return !(
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a.maxX < b.minX ||
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a.minX > b.maxX ||
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a.maxY < b.minY ||
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a.minY > b.maxY
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)
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}
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/**
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* Get whether the bounds of A contain the bounds of B. A perfect match will return true.
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* @param a Bounds
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* @param b Bounds
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* @returns
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*/
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export function boundsContain(a: Bounds, b: Bounds) {
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return (
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a.minX < b.minX && a.minY < b.minY && a.maxY > b.maxY && a.maxX > b.maxX
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)
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}
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/**
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* Get whether the bounds of A are contained by the bounds of B.
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* @param a Bounds
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* @param b Bounds
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* @returns
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*/
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export function boundsContained(a: Bounds, b: Bounds) {
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return boundsContain(b, a)
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}
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/**
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* Get whether a set of points are all contained by a bounding box.
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* @returns
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*/
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export function boundsContainPolygon(a: Bounds, points: number[][]) {
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return points.every((point) => pointInBounds(point, a))
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}
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/**
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* Get whether a polygon collides a bounding box.
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* @param points
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* @param b
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*/
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export function boundsCollidePolygon(a: Bounds, points: number[][]) {
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return intersectPolygonBounds(points, a).length > 0
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}
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/**
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* Get whether two bounds are identical.
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* @param a Bounds
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* @param b Bounds
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* @returns
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*/
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export function boundsAreEqual(a: Bounds, b: Bounds) {
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return !(
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b.maxX !== a.maxX ||
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b.minX !== a.minX ||
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b.maxY !== a.maxY ||
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b.minY !== a.minY
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)
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}
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/**
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* Get whether a point is inside of a bounds.
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* @param A
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* @param b
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* @returns
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*/
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export function pointInBounds(A: number[], b: Bounds) {
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return !(A[0] < b.minX || A[0] > b.maxX || A[1] < b.minY || A[1] > b.maxY)
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}
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