webpd/dist/src/pd-gui/geometry.js

WebPd is a compiler for audio programming language Pure Data allowing to run .pd patches on web pages.

const makeTranslationTransform = (fromPoint, toPoint) => {
    const xOffset = toPoint.x - fromPoint.x;
    const yOffset = toPoint.y - fromPoint.y;
    return (fromPoint) => {
        return {
            x: fromPoint.x + xOffset,
            y: fromPoint.y + yOffset,
        };
    };
};
const sumPoints = (p1, p2) => ({
    x: p1.x + p2.x,
    y: p1.y + p2.y,
});
const computeRectanglesIntersection = (r1, r2) => {
    const topLeft = {
        x: Math.max(r1.topLeft.x, r2.topLeft.x),
        y: Math.max(r1.topLeft.y, r2.topLeft.y),
    };
    const bottomRight = {
        x: Math.min(r1.bottomRight.x, r2.bottomRight.x),
        y: Math.min(r1.bottomRight.y, r2.bottomRight.y),
    };
    if (bottomRight.x <= topLeft.x || bottomRight.y <= topLeft.y) {
        return null;
    }
    else {
        return { topLeft, bottomRight };
    }
};
const isPointInsideRectangle = (p, r) => r.topLeft.x <= p.x &&
    p.x <= r.bottomRight.x &&
    r.topLeft.y <= p.y &&
    p.y <= r.bottomRight.y;

export { computeRectanglesIntersection, isPointInsideRectangle, makeTranslationTransform, sumPoints };