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feat: add support for more UML arrowheads (#7391)

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David Luzar 2023-12-06 16:00:00 +01:00 • committed by GitHub
parent a04cc707c3
commit b9cfbc2077
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15 changed files with 449 additions and 216 deletions
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16
src/math.ts
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@ -15,18 +15,20 @@ import { Mutable } from "./utility-types";
import { ShapeCache } from "./scene/ShapeCache";
export const rotate = (
x1: number,
y1: number,
x2: number,
y2: number,
// target point to rotate
x: number,
y: number,
// point to rotate against
cx: number,
cy: number,
angle: number,
): [number, number] =>
// 𝑎′𝑥=(𝑎𝑥−𝑐𝑥)cos𝜃−(𝑎𝑦−𝑐𝑦)sin𝜃+𝑐𝑥
// 𝑎′𝑦=(𝑎𝑥−𝑐𝑥)sin𝜃+(𝑎𝑦−𝑐𝑦)cos𝜃+𝑐𝑦.
// https://math.stackexchange.com/questions/2204520/how-do-i-rotate-a-line-segment-in-a-specific-point-on-the-line
[
(x1 - x2) * Math.cos(angle) - (y1 - y2) * Math.sin(angle) + x2,
(x1 - x2) * Math.sin(angle) + (y1 - y2) * Math.cos(angle) + y2,
(x - cx) * Math.cos(angle) - (y - cy) * Math.sin(angle) + cx,
(x - cx) * Math.sin(angle) + (y - cy) * Math.cos(angle) + cy,
];
export const rotatePoint = (
@ -303,7 +305,7 @@ export const getControlPointsForBezierCurve = (
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: Point,
) => {
const shape = ShapeCache.generateElementShape(element);
const shape = ShapeCache.generateElementShape(element, null);
if (!shape) {
return null;
}