256 lines
7.4 KiB
TypeScript
256 lines
7.4 KiB
TypeScript
import type { PolylineProps } from 'cadapi'
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import { Circle, Polyline, Polyline2Points } from 'cadapi'
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import { EndType, JoinType } from 'js-angusj-clipper/web'
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import type { Box3, Vector3 } from 'three'
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import { Vector2 } from 'three'
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import { clipperCpp } from '../ClipperCpp'
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import type { Point } from '../Point'
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import { Path, PathScale } from '../core/Path'
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import type { IOffset } from './Simplify2'
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import { SimplifyDouglasPeucker } from './Simplify2'
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/** 内外接多边形 */
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export function Circle2Points(circle: Circle, knifRadius: number, splitSize = 10, outside = false): Point[] {
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let radius = circle.Radius
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const an = Math.PI * 2 / splitSize
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if (outside)
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radius = radius / Math.cos(an / 2) + knifRadius
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else
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radius -= knifRadius
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const cenP = circle.Center
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const pts: Vector3[] = []
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for (let i = 0; i < splitSize; i++)
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pts.push(polar(cenP.clone(), an * i, radius))
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return pts as Point[]
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}
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export function Curve2Path(curve: Polyline, outside = false): Path {
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if (curve.IsClockWise)
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curve.Reverse()
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const w = new CurveWrap(curve, 3, outside)
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return new Path(outside ? w.GetOutsidePoints() : w.GetInsidePoints())
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}
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export class CurveWrap {
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BoundingBox: Box3
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Area: number
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SimplyPolyline: Polyline
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SimplyOffset: IOffset
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Used = false
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Holes: CurveWrap[] = []
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Points: Point[]
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constructor(public Curve: Polyline | Circle, public KnifRadius: number, public IsOutside: boolean) {
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this.BoundingBox = Curve.BoundingBox
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if (Curve instanceof Polyline) {
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const pts = Polyline2Points(Curve, IsOutside, 0)[1]
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/**
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* 精简算法SimplifyDouglasPeucker 会导致轮廓变大，
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* 修改成直接取点 陈雄 QQ聊天记录 23.9.18
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* 23.10.9 by lrx
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*/
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const [spts, offset] = SimplifyDouglasPeucker(pts, KnifRadius ** 2 + KnifRadius)
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if (spts.length !== pts.length && spts.length > 2) {
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this.SimplyOffset = offset
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this.SimplyPolyline = Path2Polyline(spts)
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this.Curve = this.SimplyPolyline// 保险起见,也更新它
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this.Area = this.SimplyPolyline.Area
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}
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else// 此处更新多段线
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{ this.Curve = Path2Polyline(pts) }
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this.Points = spts
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// 以下修改后的
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// this.Curve = Path2Polyline(pts);
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// this.Points = pts;
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}
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if (this.Area === undefined)
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this.Area = this.Curve.Area
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}
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ContainsCurve(curve: CurveWrap): boolean {
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if (this.SimplyPolyline)
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return this.SimplyPolyline.PtInCurve(curve.Curve.StartPoint)
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return this.Curve.PtInCurve(curve.Curve.StartPoint)
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}
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GetOutsidePoints(): Point[] {
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if (this.Curve instanceof Circle) {
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const pts = Circle2Points(this.Curve, this.KnifRadius, 10, true)
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return pts
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}
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else {
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const pl = this.SimplyPolyline || this.Curve
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let offset = this.KnifRadius
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if (this.SimplyOffset)
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offset += this.SimplyOffset.positiveOffset
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if (offset > 0) {
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let pts = pl.GetStretchPoints() as Point[]
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pts = clipperCpp.lib.offsetToPaths({
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delta: offset * 1e4,
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offsetInputs: [{ data: PathScale(pts, 1e4), joinType: JoinType.Miter, endType: EndType.ClosedPolygon }],
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})[0]
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try {
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PathScale(pts, 1e-4)
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}
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catch {
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console.log('err')
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}
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return pts
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}
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else { return this.Points }
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}
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}
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GetInsidePoints(): Point[] {
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return this.GetInsidePoints2(this.KnifRadius)
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}
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GetInsidePoints2(d: number): Point[] {
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if (this.Curve instanceof Circle) {
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const pts = Circle2Points(this.Curve, d, 10, false)
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return pts
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}
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else {
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const pl = this.SimplyPolyline || this.Curve
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let offset = -d
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if (this.SimplyOffset)
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offset += this.SimplyOffset.negativeOffset
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if (offset < -0.01) {
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const pls = pl.GetOffsetCurves(offset)
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if (pls.length)
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return pls[0].GetStretchPoints()
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}
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else { return this.Points }
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}
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}
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/** 引入Polyline 已经含刀半径， 获得精简后的点阵 */
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GetOrgPoints(outside = true): Point[] {
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if (this.Curve instanceof Circle) {
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const pts = Circle2Points(this.Curve, 0, 10, outside)
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return pts
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}
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else {
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const pl = this.SimplyPolyline || this.Curve
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let offset = 0
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if (this.SimplyOffset)
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offset += this.SimplyOffset.positiveOffset
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if (offset > 0) {
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let pts = pl.GetStretchPoints() as Point[]
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pts = clipperCpp.lib.offsetToPaths({
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delta: offset * 1e4,
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offsetInputs: [{ data: PathScale(pts, 1e4), joinType: JoinType.Miter, endType: EndType.ClosedPolygon }],
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})[0]
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try {
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PathScale(pts, 1e-4)
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}
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catch {
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console.log('err')
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}
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return pts
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}
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else {
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return this.Points
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}
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}
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}
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}
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/** 多段线 转点整 已弃用，整合到CAD api 23.11.2 */
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// export function Polylin2Points(pl: Polyline, outside: boolean, knifRadius: number): [Polyline, Point[]]
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// {
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// let pts: Point[] = [];
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// if (!outside) knifRadius = -knifRadius;
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// if (pl.IsClockWise) pl.Reverse();
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// for (let i = 0; i < pl.EndParam; i++)
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// {
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// pts.push(pl.GetPointAtParam(i));
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// let bul = pl.GetBulgeAt(i);
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// if (bul !== 0)
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// {
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// let arc = pl.GetCurveAtIndex(i) as Arc;
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// let allAngle = arc.AllAngle;
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// let arcLength = arc.Length;
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// // let splitCount = Math.round(allAngle / 0.4);
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// // if (arcLength < 300)
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// // splitCount = 2;
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// // else
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// // splitCount = Math.max(arcLength / 200, splitCount,2);
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// let minCount = Math.floor(allAngle * 4 / Math.PI);
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// let splitCount = Math.round(allAngle / 0.4);
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// if (arcLength < 300)
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// splitCount = Math.max(2, minCount);
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// else
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// splitCount = Math.max(Math.floor(arcLength / 200), splitCount,2, minCount);
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// let radius = arc.Radius;
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// if (outside === bul > 0)
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// radius = radius / Math.cos(allAngle / (splitCount * 2));
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// let cp = arc.Center;
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// for (let j = outside ? 0.5 : 0; j < splitCount; j++)
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// {
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// let a = arc.GetAngleAtParam(j * (1 / splitCount));
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// let p = polar(cp.clone(), a, radius);
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// pts.push(p);
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// }
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// }
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// }
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// if (knifRadius !== 0)
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// {
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// pts = clipperCpp.lib.offsetToPaths({
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// delta: knifRadius * 1e4,
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// offsetInputs: [{ data: PathScale(pts, 1e4), joinType: JoinType.Miter, endType: EndType.ClosedPolygon }]
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// })[0];
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// PathScale(pts, 1e-4);
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// }
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// return [pl, pts];
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// }
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export function Path2Polyline(path: Point[]): Polyline {
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const pl = new Polyline()
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pl.LineData = path.map((p) => {
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return { pt: new Vector2(p.x, p.y), bul: 0 }
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})
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pl.CloseMark = true
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return pl
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}
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export function Points2Polyline(pts: any[]): Polyline {
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const lined: PolylineProps[] = []
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const count = pts.length
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for (let i = 0; i < count; i++) {
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const p0 = pts[i]
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lined.push({ pt: new Vector2(p0.x, p0.y), bul: p0.bul })
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}
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const pls = new Polyline(lined)
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pls.CloseMark = true
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return pls
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}
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export function polar<T extends Vector2 | Vector3>(v: T, an: number, dis: number): T {
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v.x += Math.cos(an) * dis
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v.y += Math.sin(an) * dis
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return v
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}
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