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chore: Unify math types, utils and functions (#8389)

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Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>
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Márk Tolmács 2024-09-03 00:23:38 +02:00 • committed by GitHub
parent e3d1dee9d0
commit f4dd23fc31
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98 changed files with 4291 additions and 3661 deletions
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55
packages/utils/bbox.ts
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@ -1,9 +1,16 @@
import {
vectorCross,
vectorFromPoint,
type GlobalPoint,
type LocalPoint,
} from "../math";
import type { Bounds } from "../excalidraw/element/bounds";
import type { Point } from "../excalidraw/types";
export type LineSegment = [Point, Point];
export type LineSegment<P extends LocalPoint | GlobalPoint> = [P, P];
export function getBBox(line: LineSegment): Bounds {
export function getBBox<P extends LocalPoint | GlobalPoint>(
line: LineSegment<P>,
): Bounds {
return [
Math.min(line[0][0], line[1][0]),
Math.min(line[0][1], line[1][1]),
@ -12,40 +19,37 @@ export function getBBox(line: LineSegment): Bounds {
];
}
export function crossProduct(a: Point, b: Point) {
return a[0] * b[1] - b[0] * a[1];
}
export function doBBoxesIntersect(a: Bounds, b: Bounds) {
return a[0] <= b[2] && a[2] >= b[0] && a[1] <= b[3] && a[3] >= b[1];
}
export function translate(a: Point, b: Point): Point {
return [a[0] - b[0], a[1] - b[1]];
}
const EPSILON = 0.000001;
export function isPointOnLine(l: LineSegment, p: Point) {
const p1 = translate(l[1], l[0]);
const p2 = translate(p, l[0]);
export function isPointOnLine<P extends GlobalPoint | LocalPoint>(
l: LineSegment<P>,
p: P,
) {
const p1 = vectorFromPoint(l[1], l[0]);
const p2 = vectorFromPoint(p, l[0]);
const r = crossProduct(p1, p2);
const r = vectorCross(p1, p2);
return Math.abs(r) < EPSILON;
}
export function isPointRightOfLine(l: LineSegment, p: Point) {
const p1 = translate(l[1], l[0]);
const p2 = translate(p, l[0]);
export function isPointRightOfLine<P extends GlobalPoint | LocalPoint>(
l: LineSegment<P>,
p: P,
) {
const p1 = vectorFromPoint(l[1], l[0]);
const p2 = vectorFromPoint(p, l[0]);
return crossProduct(p1, p2) < 0;
return vectorCross(p1, p2) < 0;
}
export function isLineSegmentTouchingOrCrossingLine(
a: LineSegment,
b: LineSegment,
) {
export function isLineSegmentTouchingOrCrossingLine<
P extends GlobalPoint | LocalPoint,
>(a: LineSegment<P>, b: LineSegment<P>) {
return (
isPointOnLine(a, b[0]) ||
isPointOnLine(a, b[1]) ||
@ -56,7 +60,10 @@ export function isLineSegmentTouchingOrCrossingLine(
}
// https://martin-thoma.com/how-to-check-if-two-line-segments-intersect/
export function doLineSegmentsIntersect(a: LineSegment, b: LineSegment) {
export function doLineSegmentsIntersect<P extends GlobalPoint | LocalPoint>(
a: LineSegment<P>,
b: LineSegment<P>,
) {
return (
doBBoxesIntersect(getBBox(a), getBBox(b)) &&
isLineSegmentTouchingOrCrossingLine(a, b) &&