One Hat Cyber Team

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Dir : ~/var/www/invoice/node_modules/zrender/src/contain/

View File Name : cubic.ts

import * as curve from '../core/curve';

/**
 * 三次贝塞尔曲线描边包含判断
 */
export function containStroke(
    x0: number, y0: number, x1: number, y1: number,
    x2: number, y2: number, x3: number, y3: number,
    lineWidth: number, x: number, y: number
): boolean {
    if (lineWidth === 0) {
        return false;
    }
    const _l = lineWidth;
    // Quick reject
    if (
        (y > y0 + _l && y > y1 + _l && y > y2 + _l && y > y3 + _l)
        || (y < y0 - _l && y < y1 - _l && y < y2 - _l && y < y3 - _l)
        || (x > x0 + _l && x > x1 + _l && x > x2 + _l && x > x3 + _l)
        || (x < x0 - _l && x < x1 - _l && x < x2 - _l && x < x3 - _l)
    ) {
        return false;
    }
    const d = curve.cubicProjectPoint(
        x0, y0, x1, y1, x2, y2, x3, y3,
        x, y, null
    );
    return d <= _l / 2;
}