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@ -1,4 +1,5 @@
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import { Box2, Box3, Line3, Matrix3, Matrix4, Vec2, Vector2, Vector3 } from 'three';
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import { SplitPolyline } from '../Add-on/BoardCutting/SplitPolyline';
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import { Arc } from '../DatabaseServices/Entity/Arc';
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import { Circle } from '../DatabaseServices/Entity/Circle';
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import { Curve } from '../DatabaseServices/Entity/Curve';
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@ -9,7 +10,7 @@ import { IsPointInBowArc } from '../DatabaseServices/PointInPolyline';
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import { Spline } from '../DatabaseServices/Spline';
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import { Count } from '../Geometry/Count';
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import { CurveMap, Vertice } from '../Geometry/CurveMap';
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import { AsVector2, AsVector3, XAxis, YAxis, ZAxis, ZeroVec, equaln, equalv2, equalv3, isIntersect, isParallelTo } from '../Geometry/GeUtils';
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import { AsVector2, AsVector3, XAxis, YAxis, ZAxis, ZeroVec, equaln, equalv2, equalv3, isParallelTo } from '../Geometry/GeUtils';
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import { Vec3 } from '../Geometry/IVec3';
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import { Matrix2 } from '../Geometry/Matrix2';
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import { Orbit } from '../Geometry/Orbit';
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@ -790,94 +791,39 @@ export function Pts2Polyline(pts: (Vec3 | Vec2)[], isClose: boolean): Polyline
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return pl;
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}
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const PolylineSpliteRectFuzz = 1e-3;
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/**封闭多段线 分割成矩形 */
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export function PolylineSpliteRect(outline: Polyline): Polyline[]
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/**
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* 将封闭的多段线,通过和y轴平行的线,分割成多个矩形
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* @param outline 这个多边形是横平竖直的,否则返回自身
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* @param polylineParalleXYFuzz 平行x或y的容差
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* @returns 裁剪后的矩形集
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*/
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export function PolylineSpliteRect(outline: Polyline, polylineParalleXYFuzz = 1e-3): Polyline[]
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{
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if (!outline.IsClose || IsRect(outline))
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return [outline];
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let firstDerv = outline.GetFirstDeriv(0).normalize();
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if (!isParallelTo(firstDerv, XAxis, PolylineSpliteRectFuzz) && !isParallelTo(firstDerv, YAxis, PolylineSpliteRectFuzz))
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return [outline];
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let cus = outline.Explode();
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let yCus: Curve[] = [];
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let xSet: Set<number> = new Set();
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for (let c of cus)
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{
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if (c instanceof Arc) return [outline];
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let derv = c.GetFirstDeriv(0).normalize();
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if (isParallelTo(derv, YAxis, PolylineSpliteRectFuzz))
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yCus.push(c);
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else
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if (!isParallelTo(derv, XAxis, PolylineSpliteRectFuzz))
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{
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return [outline];
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}
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if (isParallelTo(derv, YAxis, polylineParalleXYFuzz))
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xSet.add(c.StartPoint.x);
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else if (!isParallelTo(derv, XAxis, polylineParalleXYFuzz))
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return [outline];
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}
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yCus.sort((c1, c2) => c1.StartPoint.x - c2.StartPoint.x);
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let rects: Polyline[] = [];
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let endParam = outline.EndParam;
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for (let i = 0; i < yCus.length - 1; i++)
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{
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let c1 = yCus[i];
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let c2 = yCus[i + 1];
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let x1 = c1.StartPoint.x;
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let x2 = c2.StartPoint.x;
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if (equaln(x1, x2))
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continue;
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let y1: number;
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let y2: number;
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let res = c1.IntersectWith2(outline, IntersectOption.ExtendThis);
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let res2 = c2.IntersectWith2(outline, IntersectOption.ExtendThis);
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let pars: number[] = [];
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for (let i of res) pars.push(i.argParam);
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for (let i of res2) pars.push(i.argParam);
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for (let i = 0; i < pars.length; i++)
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{
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let p = pars[i];
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if (p < 0) p = 0;//请参照测试用例
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else if (p > endParam) p = endParam;//请参照测试用例
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else p = Math.floor(p);
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pars[i] = p;
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}
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pars.sort((a, b) => a - b);
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arrayRemoveDuplicateBySort(pars);
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//轮廓的每条线段都平行于X或Y轴 可直接按端点切割
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const knifePls: Polyline[] = [];
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const xList = Array.from(xSet).sort((a, b) => a - b);
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let ys: number[] = [];
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for (let par of pars)
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{
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let c = outline.GetCurveAtParam(par);
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let derv = c.GetFirstDeriv(0).normalize();
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if (isParallelTo(derv, XAxis, PolylineSpliteRectFuzz))
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{
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let x3 = c.StartPoint.x;
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let x4 = c.EndPoint.x;
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if (x3 > x4)
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[x3, x4] = [x4, x3];
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if (isIntersect(x1, x2, x3, x4, -PolylineSpliteRectFuzz))
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ys.push(c.StartPoint.y);
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}
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}
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for (let x of xList)
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knifePls.push(new Polyline([{ pt: AsVector2({ x, y: 0 }), bul: 0 }, { pt: AsVector2({ x, y: 1 }), bul: 0 }]));
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if (ys.length < 2) return [outline];
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ys.sort((a, b) => a - b);
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y1 = ys[0];
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y2 = arrayLast(ys);
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rects.push(new Polyline().RectangleFrom2Pt(new Vector3(x1, y1), new Vector3(x2, y2)));
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}
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//裁剪结果
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let rects = SplitPolyline(outline, knifePls).filter(pl => pl.IsClose);
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return rects;
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}
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ChenX