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- 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;
- }
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