mirror of https://gitee.com/cf-fz/WebCAD.git
!1804 重构:新的板件交集算法,影响:板件干涉,板件切割(非平行垂直时)
ChenX
3 years ago
parent
9485fa687c
commit
60d3738cc7
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import { Geom3 } from "@jscad/modeling/src/geometries/types";
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import { Mat4 } from "@jscad/modeling/src/maths/mat4";
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import { Vec3 } from "@jscad/modeling/src/maths/vec3";
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import { intersect } from "@jscad/modeling/src/operations/booleans";
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import { Matrix4 } from "three";
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export interface Geom3Res
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{
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polygons: Array<{
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vertices: Array<Vec3>,
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plane: [number, number, number, number];
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}>;
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}
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export function CSGIntersect(csg1: Geom3, csg2: Geom3, csg2tranfrom: Matrix4): Geom3Res
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{
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let bak1 = csg1.polygons;
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let bak2 = csg2.polygons;
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let bakMtx = csg2.transforms;
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csg2.transforms = csg2tranfrom.elements as Mat4;
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csg1.polygons = bak1.concat();
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csg2.polygons = bak2.concat();
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let res = intersect(csg1, csg2) as unknown as Geom3Res;
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csg1.polygons = bak1;
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csg2.polygons = bak2;
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csg2.transforms = bakMtx;
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return res;
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}
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import { geom2 } from "@jscad/modeling/src/geometries";
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import { Geom3 } from "@jscad/modeling/src/geometries/geom3/";
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import { Mat4 } from "@jscad/modeling/src/maths/mat4";
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import { subtract } from "@jscad/modeling/src/operations/booleans";
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import { extrudeLinear } from "@jscad/modeling/src/operations/extrusions";
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import { ExtrudeSolid } from "../../DatabaseServices/Entity/Extrude";
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import { SplitCurveParams } from "./SplitCurveParams";
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//使用这个算法会有性能问题 用webworker会好一点,不到必要时刻不使用(例如切斜边 和 二维刀路造型)
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export function ExtBuildCSG(ext: ExtrudeSolid): Geom3
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{
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let c = ext.ContourCurve;
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let pts = SplitCurveParams(c).map(p => c.GetPointAtParam(p));
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let geo2 = geom2.fromPoints(pts.map(p => [p.x, p.y]));
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let geo = extrudeLinear({ height: ext.Thickness }, geo2);
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let grooveGeo: Geom3[] = ext.Grooves.map(ExtBuildCSG);
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geo.transforms = ext.OCSNoClone.elements as Mat4;
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if (grooveGeo.length)
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return subtract(geo, grooveGeo);
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else
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return geo;
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}
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import { arraySortByNumber } from "../../Common/ArrayExt";
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import { clamp } from "../../Common/Utils";
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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 { ExtureContourCurve } from "../../DatabaseServices/Entity/Extrude";
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const ARC_SplitLength = 4;//圆的分段长度
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const Arc_MinSplitCount = 12;//圆的最小分段个数
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const ARC_MaxSplitCount = 360;//圆的最大分段个数
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/**
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*
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* @param cu
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* @returns
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*/
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export function SplitCurveParams(cu: ExtureContourCurve): number[]
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{
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let xparams: number[] = [];
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if (cu instanceof Circle)
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{
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let splitCount = cu.Radius / ARC_SplitLength;
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splitCount = clamp(Math.floor(splitCount), Arc_MinSplitCount, ARC_MaxSplitCount);
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for (let i = 0; i < splitCount; i++)
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xparams.push(i / splitCount);
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}
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else
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//分段1
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for (let i = 0; i < cu.EndParam; i++)
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{
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xparams.push(i);
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if (cu.GetBuilgeAt(i) !== 0)
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{
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let arc = cu.GetCurveAtIndex(i) as Arc;
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let splitCount = arc.Radius / ARC_SplitLength;
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splitCount = clamp(Math.floor(splitCount), Arc_MinSplitCount, ARC_MaxSplitCount);
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if (splitCount === 0)
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continue;
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let a = Math.PI * 2 / splitCount;
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let params: number[] = [];
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for (let j = 0; j < splitCount; j++)
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{
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let param = arc.GetParamAtAngle(a * j);
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if (arc.ParamOnCurve(param))
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params.push(param);
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}
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arraySortByNumber(params);
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if (params.length === 0)
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continue;
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for (let p of params)
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{
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if (p > 1e-5 && p < 9.99999)
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xparams.push(p + i);
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}
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}
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}
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xparams.push(cu.EndParam);
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return xparams;
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}
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