tldraw/utils/bounds.ts

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2021-05-13 18:22:16 +00:00
import { Bounds } from "types"
/**
* Get whether two bounds collide.
* @param a Bounds
* @param b Bounds
* @returns
*/
export function boundsCollide(a: Bounds, b: Bounds) {
return !(
a.maxX < b.minX ||
a.minX > b.maxX ||
a.maxY < b.minY ||
a.minY > b.maxY
)
}
/**
* Get whether the bounds of A contain the bounds of B. A perfect match will return true.
* @param a Bounds
* @param b Bounds
* @returns
*/
export function boundsContain(a: Bounds, b: Bounds) {
return (
a.minX < b.minX && a.minY < b.minY && a.maxY > b.maxY && a.maxX > b.maxX
)
}
/**
* Get whether the bounds of A are contained by the bounds of B.
* @param a Bounds
* @param b Bounds
* @returns
*/
export function boundsContained(a: Bounds, b: Bounds) {
return boundsContain(b, a)
}
/**
* Get whether two bounds are identical.
* @param a Bounds
* @param b Bounds
* @returns
*/
export function boundsAreEqual(a: Bounds, b: Bounds) {
return !(
b.maxX !== a.maxX ||
b.minX !== a.minX ||
b.maxY !== a.maxY ||
b.minY !== a.minY
)
}
/**
* Get whether a point is inside of a bounds.
* @param A
* @param b
* @returns
*/
export function pointInBounds(A: number[], b: Bounds) {
return !(A[0] < b.minX || A[0] > b.maxX || A[1] < b.minY || A[1] > b.maxY)
}