本帖最后由 MxDraw 于 2024-9-27 11:50 编辑
前言
CAD图形识别功能可帮助用户快速识别和提取CAD图纸中的各种图形,从而加速设计过程。​可应用在识别与分类阶段,自动识别图纸中的不同元素,通过特定特征进行区分,减少了手动分类的工作量;也可应用在数量统计阶段,统计图纸中各种构件的数量用于预算;还可运用在图纸定位和应用阶段,快速定位图纸上的特定元素,便于快速查找和修改。 mxcad 为用户提供了图形识别功能和API,用户可根据自身需求对该功能进行拓展或二次开发,更多开发文档关注公众号:梦想云图网页CAD。 图形识别步骤
2. 点击【工具(A)】菜单栏,找到图形识别功能,选择【图形识别】按钮,如下图:
3. 根据命令行提示,点击鼠标左键点选图元或拉框选择需要识别的图形(图形识别功能目前支持识别直线类、多段线类、弧线类、圆类,以及块这五类图元),如下图: 4. 点击右键结束选择后,在弹出的图形识别框内设置查找图形详情,设置图形名称可方便后续查找已识别图形;设置重新选择图形时,会覆盖当前选中图形;设置区域查找时,需要用户框选查找范围,若未框选范围则会默认为全图纸查找图形,如下图:
5. 在图形识别框内点击【开始识别】按钮,开始在目标范围内查找图形,并将查找结果展示在图形识别列表中。点击图形识别列表下的坐标对应的【查看】按钮会自动定位到对应的图形位置,并圈选出目标图形,如下图:
6. 当识别多个图形后,可点击目标图形统计表格对应的操作列中的【详情】按钮查看识别详情,图形坐标列表将转换为该目标图形的识别结果,如下图:
识别注意事项:
如果需要识别的图形较为复杂,为保证识别速度与精度,我们需尽可能查找图形中的特殊部分而不是选取整个图形(图形对象过多时可能会导致卡顿,影响用户使用效率)。 图形识别支持区域选择,用户可根据自身需求精确定位图形筛选区域。
功能开发
下列为基于mxcad 封装的图形识别类 SearchSamePattern 用户可根据该类的使用方法利用 mxcad 进行二次开发,代码如下: - import {
- DxfCode, McCmColor, McDbArc, McDbBlockReference, McDbCircle, McDbLine, McDbPolyline, McDbWipeout, McGePoint3d,
- McGePoint3dArray, McGeVector3d, MxCADResbuf, MxCADSelectionSet, MxCADUtility, MxCpp
- } from "mxcad";
- import { MxFun } from "mxdraw";
- export class SearchSamePattern {
- /** 识别图元数 */
- private objectCount: number = 0;
- /** 选择图形集合 Map<className,[Ent]>*/
- private selectObjects: any;
- private dTol = 0.000001;
- /**
- * pt1:左下角
- * pt2:右上角
- * pt3:左上角
- * pt4:右下角
- */
- private pt1: McGePoint3d;
- private pt2: McGePoint3d;
- private pt3: McGePoint3d;
- private pt4: McGePoint3d;//包围盒大小
- private pl: McDbPolyline;
- /** 识别图形类名集合 [string] */
- private classNames: any
- /** 识别图形图片地址 */
- private patternImgUrl: String
- /** 识别对象详情 Map<ClassName,[{}]>*/
- private objectsDetails: any = {};
- // 下列为识别结果数据
- /** 识别后的图形位置数组集合 */;
- private graphBoxsPos: any[] = [];
- private formPt: McGePoint3d;
- private toPt: McGePoint3d;
- /** 点精度值 */
- private dTolPt: any;
- /** 识别后图形列表 */
- private patternList: any = {};
- /** 选择的图形集合 */
- public setSelectset(ss: MxCADSelectionSet): Promise<String> {
- if (!ss?.count()) return;
- const mxcad = MxCpp.getCurrentMxCAD();
- // 获取当前图纸的空间块表记录包围盒
- const { maxPt, minPt } = mxcad.getDatabase().currentSpace.getBoundingBox();
- const currentDrawOrder = mxcad.getDatabase().currentSpace.getMinMaxDrawOrder()
- const n = MxFun.screenCoordLong2Doc(Math.abs(maxPt.x - minPt.x));
- minPt.x -= n; minPt.y -= n; maxPt.x += n; maxPt.y += n;
- let points = new McGePoint3dArray();
- points.append(minPt);
- points.append(new McGePoint3d(minPt.x, maxPt.y, 0));
- points.append(new McGePoint3d(maxPt.x, maxPt.y, 0));
- points.append(new McGePoint3d(maxPt.x, minPt.y, 0));
- this.objectCount = ss.count();
- // 获取遮罩层drawOrder
- let wipeout = new McDbWipeout
- wipeout.setVertices(points);
- const wipeoutId = mxcad.drawEntity(wipeout);
- const e = wipeoutId.getMcDbEntity();
- e.drawOrder = currentDrawOrder.maxDrawOrder + 1;
- this.selectObjects = {};
- const oldDrawOder = [];
- ss.forEach(id => {
- const ent = id.getMcDbEntity();
- /** 记录识别图形的信息 */
- if (!this.selectObjects[ent.objectName]) this.selectObjects[ent.objectName] = [];
- this.selectObjects[ent.objectName].push(ent);
- if (ent.objectName === 'McDbLine') {
- if (!this.objectsDetails['McDbLine']) this.objectsDetails['McDbLine'] = [];
- this.objectsDetails['McDbLine'].push({ entity: ent, length: (ent as McDbLine).getLength().val });
- } else if (ent.objectName === 'McDbArc') {
- if (!this.objectsDetails['McDbArc']) this.objectsDetails['McDbArc'] = [];
- const length = (ent as McDbArc).getLength().val;
- const { bugle } = this.getBugle((ent as McDbArc), length)
- this.objectsDetails['McDbArc'].push({ entity: ent, length, bugle });
- } else if (ent.objectName === 'McDbCircle') {
- if (!this.objectsDetails['McDbCircle']) this.objectsDetails['McDbCircle'] = [];
- const radius = (ent as McDbCircle).radius;
- this.objectsDetails['McDbCircle'].push({ entity: ent, radius });
- } else if (ent.objectName === 'McDbBlockReference') {
- if (!this.objectsDetails['McDbBlockReference']) this.objectsDetails['McDbBlockReference'] = [];
- const blkName = (ent as McDbBlockReference).blockName;
- this.objectsDetails['McDbBlockReference'].push({ entity: ent, blkName });
- } else if (ent.objectName === 'McDbPolyline') {
- if (!this.objectsDetails['McDbPolyline']) this.objectsDetails['McDbPolyline'] = [];
- const length = (ent as McDbPolyline).getLength().val;
- this.objectsDetails['McDbPolyline'].push({ entity: ent, length });
- }
- /** 渲染顺序 */
- oldDrawOder.push({ obj: ent, drawOrder: ent.drawOrder });
- ent.drawOrder = e.drawOrder + 1;
- const { maxPt, minPt } = ent.getBoundingBox();
- if (!this.pt1 || !this.pt2) {
- this.pt1 = minPt;
- this.pt2 = maxPt;
- } else {
- if (minPt.x < this.pt1.x) this.pt1.x = minPt.x;
- if (minPt.y < this.pt1.y) this.pt1.y = minPt.y;
- if (maxPt.x > this.pt2.x) this.pt2.x = maxPt.x;
- if (maxPt.y > this.pt2.y) this.pt2.y = maxPt.y;
- }
- });
- this.classNames = Object.keys(this.selectObjects);
- /**
- * 计算包围盒其他两个角点
- */
- this.pt3 = new McGePoint3d(this.pt1.x, this.pt2.y);
- this.pt4 = new McGePoint3d(this.pt2.x, this.pt1.y);
- /** 绘制识别图形包围盒 */
- this.pl = new McDbPolyline()
- this.pl.addVertexAt(this.pt1);
- this.pl.addVertexAt(this.pt3);
- this.pl.addVertexAt(this.pt2);
- this.pl.addVertexAt(this.pt4);
- this.pl.isClosed = true;
- const num = MxFun.screenCoordLong2Doc(10);
- this.pt1.x -= num; this.pt1.y -= num; this.pt2.x += num; this.pt2.y += num;
- // 生成预览图
- let w = Math.abs(this.pt1.x - this.pt2.x);
- let h = Math.abs(this.pt1.y - this.pt2.y);
- if (w < 1 || h < 1) return;
- let jpg_width = 300;
- let jpg_height = 240;
- return new Promise<String>((resolve, reject) => {
- MxFun.getCurrentDraw().createCanvasImageData(
- (imageData: String) => {
- this.patternImgUrl = imageData;
- // 恢复绘制顺序
- oldDrawOder.forEach(item => {
- item.obj.drawOrder = item.drawOrder;
- })
- wipeoutId.erase();
- resolve(imageData)
- },
- {
- width: jpg_width, // 图片宽
- height: jpg_height, // 图片高
- range_pt1: this.pt1.toVector3(), // 截图范围角点1
- range_pt2: this.pt2.toVector3(), // 截图范围角点2
- }
- );
- });
- };
- // 开始识别图形
- /**
- * 1.查找初始包围盒
- * 2.筛选符合条件的包围盒
- * 3.比较包围盒内的每一个图元与需要识别的图元是否匹配
- */
- public identifyGraphics(corner1?: McGePoint3d, corner2?: McGePoint3d): any {
- /** 记录图形缩略图 */
- this.patternList.patternImgUrl = this.patternImgUrl;
- /**初始化图形位置列表 */
- this.graphBoxsPos.length = 0;
- const mxcad = MxCpp.getCurrentMxCAD();
- this.dTolPt = mxcad.mxdraw.viewCoordLong2Cad(0.5);// 设置精度值
- if (!this.classNames) return;
- const array = this.classNames.map(name => this.selectObjects[name].length);
- const minIndex = array.findIndex(element => element === Math.min(...array));
- const str = this.classNames[minIndex];
- /** 识别块 */
- if (str === 'McDbBlockReference') {
- const refBlk = this.selectObjects['McDbBlockReference'][0].clone() as McDbBlockReference;
- const blkName = refBlk.blockName; // 图块名
- const { position } = this.getBlkMidPt(refBlk);
- this.formPt = position;
- const rotate = refBlk.rotation;
- // 设置图块过滤器
- const filter = new MxCADResbuf([DxfCode.kEntityType, "INSERT"])
- const ss = new MxCADSelectionSet()
- if (corner1 && corner2) {
- // 局部选择
- ss.crossingSelect(corner1.x, corner1.y, corner2.x, corner2.y, filter);
- } else {
- // 全局选择
- ss.allSelect(filter);
- };
- // 筛选出符合条件的块
- const boxs: any[] = [];
- ss.forEach(id => {
- const _blk = id.getMcDbEntity().clone() as McDbBlockReference;
- /** 块名相等=》计算旋转角度=》计算包围盒大小 */
- if (blkName === _blk.blockName) {
- const _rotate = _blk.rotation;
- const angle = rotate >= 0 ? _rotate - rotate : rotate - _rotate;
- const { position: _position, minPt, maxPt } = this.getBlkMidPt(_blk);
- if (this.classNames.length === 1) {
- this.toPt = _position;
- this.identificationBBox(minPt, maxPt, 0)
- } else {
- // 平移旋转初始包围盒。计算出最新包围盒的大小
- const _pl = this.pl.clone() as McDbPolyline;
- _pl.move(this.formPt, _position);
- _pl.rotate(_position, angle);
- let x = [], y = [];
- for (let i = 0; i < _pl.numVerts(); i++) {
- const pt = _pl.getPointAt(i).val;
- x.push(pt.x);
- y.push(pt.y);
- }
- const _minPt = new McGePoint3d(Math.min(...x) - 1, Math.min(...y) - 1);
- const _maxPt = new McGePoint3d(Math.max(...x) + 1, Math.max(...y) + 1);
- const res = boxs.filter(item => {
- let ret1 = _minPt.distanceTo(item.pt1) < this.dTolPt && _maxPt.distanceTo(item.pt2) < this.dTolPt
- let ret2 = _minPt.distanceTo(item.pt2) < this.dTolPt && _maxPt.distanceTo(item.pt1) < this.dTolPt
- return ret1 || ret2
- })
- if (!res.length) {
- boxs.push({ pt1: _minPt, pt2: _maxPt });
- this.toPt = _position;
- // MxCpp.getCurrentMxCAD().drawLine(_maxPt.x, _maxPt.y, _minPt.x, _minPt.y);
- this.identificationBBox(_minPt, _maxPt, angle);
- }
- }
- }
- });
- }
- /** 识别弧线 */
- else if (str === 'McDbArc') {
- // 识别直线
- const refArc = this.selectObjects['McDbArc'][0].clone() as McDbArc;
- const length = refArc.getLength().val; // 弧线线长度
- // 圆弧凸度
- const { bugle, midPt } = this.getBugle(refArc, length);
- const center = refArc.center;
- const vec = center.sub(midPt);
- // 设置弧线过滤器
- const filter = new MxCADResbuf([DxfCode.kEntityType, "ARC"])
- const ss = new MxCADSelectionSet()
- if (corner1 && corner2) {
- // 局部选择
- ss.crossingSelect(corner1.x, corner1.y, corner2.x, corner2.y, filter);
- } else {
- // 全局选择
- ss.allSelect(filter);
- };
- // 筛选出符合条件的弧线
- const boxs: any[] = [];
- ss.forEach(id => {
- const _arc = id.getMcDbEntity().clone() as McDbArc;
- const _length = _arc.getLength().val;
- const { bugle: _bugle, midPt: _midPt } = this.getBugle(_arc, _length);
- /** 筛选出圆弧凸度与长度相同的弧线*/
- if (Math.abs(_length - length) < this.dTol && Math.abs(_bugle - bugle) < this.dTol) {
- /** 分两种情况
- * 1.直接旋转平移得到
- * 2.镜像得到=》移动到目标位置+旋转角度+镜像翻转=》比较起始点位置
- */
- // 平移+旋转
- const _center = _arc.center;
- const _vec = _center.sub(_midPt);
- const angle = _vec.angleTo2(vec, McGeVector3d.kNegateZAxis);
- // 旋转平移初始包围盒。计算出最新包围盒的大小
- const _pl = this.pl.clone() as McDbPolyline;
- _pl.move(midPt, _midPt);
- _pl.rotate(_midPt, angle);
- let x = [], y = [];
- for (let i = 0; i < _pl.numVerts(); i++) {
- const pt = _pl.getPointAt(i).val;
- x.push(pt.x);
- y.push(pt.y);
- }
- const _minPt = new McGePoint3d(Math.min(...x) - 1, Math.min(...y) - 1);
- const _maxPt = new McGePoint3d(Math.max(...x) + 1, Math.max(...y) + 1);
- const res = boxs.filter(item => {
- let ret1 = _minPt.distanceTo(item.pt1) < this.dTolPt && _maxPt.distanceTo(item.pt2) < this.dTolPt
- let ret2 = _minPt.distanceTo(item.pt2) < this.dTolPt && _maxPt.distanceTo(item.pt1) < this.dTolPt
- let ret3 = _midPt.distanceTo(item.midPt) < this.dTolPt
- return (ret1 || ret2) && ret3
- })
- if (!res.length) {
- boxs.push({ pt1: _minPt, pt2: _maxPt, midPt: _midPt });
- this.toPt = _midPt;
- this.formPt = midPt;
- this.identificationBBox(_minPt, _maxPt, angle);
- }
- }
- });
- }
- /** 识别直线 */
- else if (str === 'McDbLine') {
- // 识别直线
- const refLine = this.selectObjects['McDbLine'][0].clone() as McDbLine;
- const length = refLine.getLength().val; // 直线长度
- const vec = refLine.endPoint.sub(refLine.startPoint); // 直线角度
- // 设置直线过滤器
- const filter = new MxCADResbuf([DxfCode.kEntityType, "LINE"])
- const ss = new MxCADSelectionSet()
- if (corner1 && corner2) {
- // 局部选择
- ss.crossingSelect(corner1.x, corner1.y, corner2.x, corner2.y, filter);
- } else {
- // 全局选择
- ss.allSelect(filter);
- };
- // 筛选出符合条件的直线
- const lineArr: McDbLine[] = [];
- ss.forEach(id => {
- const line = id.getMcDbEntity().clone() as McDbLine;
- const _length = line.getLength().val;
- /**
- * 1.未旋转
- * 2.旋转过
- */
- if (Math.abs(_length - length) < this.dTol) {
- lineArr.push(line);
- }
- });
- // 筛选出符合条件的直线后,根据包围盒范围再次筛选出符合条件的直线组合
- const boxs: any[] = [];
- if (lineArr.length > 0) {
- lineArr.forEach((item) => {
- /**
- * 将要识别的图形进行平移+旋转到目标位置
- */
- const ptArr = [item.startPoint, item.endPoint];
- ptArr.forEach((point, index) => {
- const _line = refLine.clone() as McDbLine;
- _line.move(refLine.startPoint, point);
- const _vec = ptArr[1 - index].sub(point);
- const angle = _vec.angleTo2(vec, McGeVector3d.kNegateZAxis);
- _line.rotate(point, angle)
- const pt = _line.endPoint;
- const _pl = this.pl.clone() as McDbPolyline;
- _pl.move(refLine.startPoint, point);
- _pl.rotate(point, angle);
- const _refBoxPt1 = _pl.getPointAt(0).val;
- const _refBoxPt2 = _pl.getPointAt(1).val;
- const refVec1 = _refBoxPt1.sub(_line.startPoint);
- const refVec2 = _refBoxPt2.sub(_line.startPoint);
- if (pt.distanceTo(ptArr[1 - index]) < this.dTolPt && refVec1.isEqualTo(_refBoxPt1.sub(point)) && refVec2.isEqualTo(_refBoxPt2.sub(point))) {
- let x = [], y = [];
- for (let i = 0; i < _pl.numVerts(); i++) {
- const pt = _pl.getPointAt(i).val;
- x.push(pt.x);
- y.push(pt.y);
- }
- const _minPt = new McGePoint3d(Math.min(...x) - 1, Math.min(...y) - 1);
- const _maxPt = new McGePoint3d(Math.max(...x) + 1, Math.max(...y) + 1);
- const res = boxs.filter(item => {
- let r1 = _minPt.distanceTo(item.pt1) < this.dTolPt && _maxPt.distanceTo(item.pt2) < this.dTolPt
- let r2 = _minPt.distanceTo(item.pt2) < this.dTolPt && _maxPt.distanceTo(item.pt1) < this.dTolPt
- return r1 || r2
- })
- if (!res.length) {
- boxs.push({ pt1: _minPt, pt2: _maxPt });
- this.toPt = point;
- this.formPt = refLine.startPoint;
- // MxCpp.getCurrentMxCAD().drawLine(_maxPt.x, _maxPt.y, _minPt.x, _minPt.y);
- this.identificationBBox(_minPt, _maxPt, angle);
- }
- }
- })
- })
- };
- }
- /** 识别圆 */
- else if (str === 'McDbCircle') {
- const refCricle = this.selectObjects['McDbCircle'][0].clone() as McDbCircle;
- const radius = refCricle.radius; // 圆半径
- // 设置圆过滤器
- const filter = new MxCADResbuf([DxfCode.kEntityType, "CIRCLE"])
- const ss = new MxCADSelectionSet()
- if (corner1 && corner2) {
- // 局部选择
- ss.crossingSelect(corner1.x, corner1.y, corner2.x, corner2.y, filter);
- } else {
- // 全局选择
- ss.allSelect(filter);
- };
- // 筛选出符合条件的圆
- ss.forEach(id => {
- const _circle = id.getMcDbEntity().clone() as McDbCircle;
- const _radius = _circle.radius;
- /** 筛选出圆半径相同的圆*/
- if (Math.abs(_radius - radius) < this.dTol) {
- const _center = _circle.center;
- this.toPt = _center;
- this.formPt = refCricle.center;
- // 平移初始包围盒。计算出最新包围盒的大小
- const _pl = this.pl.clone() as McDbPolyline;
- _pl.move(this.formPt, this.toPt);
- let x = [], y = [];
- for (let i = 0; i < _pl.numVerts(); i++) {
- const pt = _pl.getPointAt(i).val;
- x.push(pt.x);
- y.push(pt.y);
- }
- const _minPt = new McGePoint3d(Math.min(...x) - 1, Math.min(...y) - 1);
- const _maxPt = new McGePoint3d(Math.max(...x) + 1, Math.max(...y) + 1);
- // MxCpp.getCurrentMxCAD().drawLine(_maxPt.x, _maxPt.y, _minPt.x, _minPt.y);
- this.identificationBBox(_minPt, _maxPt, 0);
- }
- });
- }
- /** 识别多段线 */
- else if (str === 'McDbPolyline') {
- /** 长度+顶点数+顶点对应的凸度相等=》旋转+平移后的顶点相等+有凸度线段的中点相等*/
- const refPoly = this.selectObjects['McDbPolyline'][0].clone() as McDbPolyline;
- const length = refPoly.getLength().val;
- const { lengthArr, bugleArr, vertNum, vec, point } = this.getPlDetails(refPoly);
- // 设置多段线过滤器
- const filter = new MxCADResbuf([DxfCode.kEntityType, "LWPOLYLINE"])
- const ss = new MxCADSelectionSet()
- if (corner1 && corner2) {
- // 局部选择
- ss.crossingSelect(corner1.x, corner1.y, corner2.x, corner2.y, filter);
- } else {
- // 全局选择
- ss.allSelect(filter);
- };
- // 筛选出符合条件的多段线
- const boxs: any[] = [];
- ss.forEach(id => {
- const _poly = id.getMcDbEntity().clone() as McDbPolyline;
- const _length = _poly.getLength().val;
- /** 筛选 长度+顶点数+顶点对应的凸度 相同的多段线*/
- if (Math.abs(_length - length) < this.dTol && _poly.isClosed === refPoly.isClosed) {
- const { lengthArr: _lengthArr, bugleArr: _bugleArr, vertNum: _vertNum, vec: _vec, point: _point } = this.getPlDetails(_poly);
- const revBugleArr = _bugleArr.map(item => item === 0 ? item : -item);
- // 全等
- const r1 = lengthArr.toString() === _lengthArr.toString() && bugleArr.toString() === _bugleArr.toString();
- let r2 = false;
- if (!r1) {
- // 反向
- r2 = lengthArr.toString() === [..._lengthArr].reverse().toString() && bugleArr.toString() === [...revBugleArr].reverse().toString();
- }
- const r3 = vertNum === _vertNum;
- // 镜像
- const r4 = lengthArr.toString() === _lengthArr.toString() && bugleArr.toString() === [...revBugleArr].reverse().toString();
- if ((r1 || r2 || r4) && r3) {
- const poly = refPoly.clone() as McDbPolyline;
- const angle1 = vec.angleTo2(McGeVector3d.kXAxis, McGeVector3d.kNegateZAxis);
- // 如果是反向则方向取反
- const angle2 = (r2 ? _vec.negate() : _vec).angleTo2(McGeVector3d.kXAxis, McGeVector3d.kNegateZAxis);
- const angle = angle2 - angle1;
- poly.move(point, _point);
- poly.rotate(_point, angle);
- poly.trueColor = new McCmColor(255, 0, 0);
- let num = 0;
- for (let i = 0; i < vertNum; i++) {
- const pt = poly.getPointAt(i).val;
- const width = poly.getWidthsAt(i);
- const _pt = r2 ? _poly.getPointAt(vertNum - 1 - i).val : _poly.getPointAt(i).val;
- const _width = r2 ? _poly.getWidthsAt(vertNum - 1 - i) : _poly.getWidthsAt(i);
- if (pt.distanceTo(_pt) < this.dTolPt && width.val1 === _width.val1 && width.val2 === _width.val2) {
- num += 1
- } else {
- // 两个点且反向的情况
- if (vertNum === 2 && i === 0) {
- const _pt1 = _poly.getPointAt(0).val;
- const _pt2 = _poly.getPointAt(1).val;
- const pt2 = poly.getPointAt(1).val;
- const _width = _poly.getWidthsAt(0);
- if (pt2.distanceTo(_pt2) < this.dTolPt && pt.distanceTo(_pt1) < this.dTolPt && width.val1 === _width.val2 && width.val2 === _width.val1) {
- num += 2;
- }
- }
- }
- };
- if (num === vertNum) {
- // 旋转平移初始包围盒。计算出最新包围盒的大小
- const _pl = this.pl.clone() as McDbPolyline;
- _pl.move(point, _point);
- _pl.rotate(_point, angle);
- let x = [], y = [];
- for (let i = 0; i < _pl.numVerts(); i++) {
- const pt = _pl.getPointAt(i).val;
- x.push(pt.x);
- y.push(pt.y);
- }
- const _minPt = new McGePoint3d(Math.min(...x) - 1, Math.min(...y) - 1);
- const _maxPt = new McGePoint3d(Math.max(...x) + 1, Math.max(...y) + 1);
- const res = boxs.filter(item => {
- let ret1 = _minPt.distanceTo(item.pt1) < this.dTolPt && _maxPt.distanceTo(item.pt2) < this.dTolPt
- let ret2 = _minPt.distanceTo(item.pt2) < this.dTolPt && _maxPt.distanceTo(item.pt1) < this.dTolPt
- return ret1 || ret2
- })
- if (!res.length) {
- boxs.push({ pt1: _minPt, pt2: _maxPt });
- this.toPt = _point;
- this.formPt = point;
- // MxCpp.getCurrentMxCAD().drawLine(_maxPt.x, _maxPt.y, _minPt.x, _minPt.y);
- this.identificationBBox(_minPt, _maxPt, angle);
- }
- }
- }
- }
- });
- }
- /** 返回识别列表 */
- return this.patternList;
- }
- // 计算块中心点
- private getBlkMidPt = (blkRef: McDbBlockReference) => {
- const { minPt, maxPt } = blkRef.getBoundingBox();
- const pt = minPt.clone().addvec(maxPt.sub(minPt).normalize().mult(maxPt.distanceTo(minPt) / 2))
- return { position: pt, minPt, maxPt }
- }
- // 计算凸度
- private getBugle = (arc: McDbArc, length: number) => {
- const midPt = arc.getPointAtDist(length / 2).val;
- const bugle = MxCADUtility.calcBulge(arc.getPointAtDist(0).val, midPt, arc.getPointAtDist(length).val).val;
- return { bugle, midPt }
- }
- // 计算多段线的每一段线的长度和凸度
- private getPlDetails = (pl: McDbPolyline) => {
- const vertNum = pl.numVerts();
- const lengthArr: number[] = [];
- const bugleArr: number[] = [];
- let point1: McGePoint3d, point2: McGePoint3d;
- for (let i = 0; i < vertNum; i++) {
- if (i < vertNum - 1) {
- const p1 = pl.getPointAt(i).val;
- const p2 = pl.getPointAt(i + 1).val;
- const length = pl.getDistAtPoint(p2).val - pl.getDistAtPoint(p1).val;
- const bugle = pl.getBulgeAt(i);
- lengthArr.push(Number(length.toFixed(6)));
- bugleArr.push(Number(bugle.toFixed(6)));
- if (i === 0) {
- point1 = p1;
- }
- if (i === vertNum - 2) {
- point2 = p2;
- }
- }
- };
- const vec = point2.sub(point1)// 多段线角度
- const point = point1.clone().addvec(point2.sub(point1).normalize().mult(point2.distanceTo(point1) / 2))
- return { lengthArr, bugleArr, vertNum, vec, point }
- }
- // 将找到的实体数组与需要识别的实体数组比对
- private comparisonPhysical = (objects: any, maxPt: McGePoint3d, minPt: McGePoint3d, angle: number): any => {
- const calssNames = Object.keys(this.selectObjects);
- if (!calssNames) return;
- let num = 0;
- if (calssNames.includes('McDbLine')) {
- let ents = objects['McDbLine'];
- const lineObjects = this.objectsDetails['McDbLine'];
- for (let i = 0; i < lineObjects.length; i++) {
- const element = lineObjects[i];
- let _line = (element.entity as McDbLine).clone() as McDbLine;
- _line.move(this.formPt, this.toPt);
- _line.rotate(this.toPt, angle);
- const indexArr: number[] = [];
- const mLineArr = ents.filter((item: McDbLine, index: number) => {
- if (Math.abs(element.length - item.getLength().val) < this.dTol) {
- let r1 = item.startPoint.distanceTo(_line.startPoint) < this.dTolPt && item.endPoint.distanceTo(_line.endPoint) < this.dTolPt;
- let r2 = item.startPoint.distanceTo(_line.endPoint) < this.dTolPt && item.endPoint.distanceTo(_line.startPoint) < this.dTolPt;
- if (r1 || r2) indexArr.push(index);
- return r1 || r2;
- }
- });
- if (mLineArr.length > 0) {
- num += 1;
- ents.splice(indexArr[0], 1);
- ents = [...ents];
- } else {
- break;
- }
- }
- };
- if (calssNames.includes('McDbArc')) {
- let ents = objects['McDbArc'];
- const arcObjects = this.objectsDetails['McDbArc'];
- for (let i = 0; i < arcObjects.length; i++) {
- const element = arcObjects[i];
- let _arc = (element.entity as McDbArc).clone() as McDbArc;
- _arc.move(this.formPt, this.toPt);
- _arc.rotate(this.toPt, angle);
- const startPoint = _arc.getPointAtDist(0).val;
- const endPoint = _arc.getPointAtDist(element.length).val;
- const indexArr: number[] = [];
- const mArcArr = ents.filter((item: McDbArc, index: number) => {
- const _length = item.getLength().val;
- const { bugle: _bugle } = this.getBugle(item, _length)
- if (Math.abs(element.length - item.getLength().val) < this.dTol && Math.abs(_bugle - element.bugle) < this.dTol) {
- const _startPoint = item.getPointAtDist(0).val;
- const _endPoint = item.getPointAtDist(_length).val;
- let r1 = startPoint.distanceTo(_startPoint) < this.dTolPt && endPoint.distanceTo(_endPoint) < this.dTolPt;
- let r2 = startPoint.distanceTo(_endPoint) < this.dTolPt && endPoint.distanceTo(_startPoint) < this.dTolPt;
- if (r1 || r2) {
- indexArr.push(index);
- }
- return r1 || r2;
- }
- });
- if (mArcArr.length > 0) {
- num += 1;
- ents.splice(indexArr[0], 1);
- ents = [...ents];
- } else {
- break;
- }
- }
- };
- if (calssNames.includes('McDbCircle')) {
- let ents = objects['McDbCircle'];
- const circleObjects = this.objectsDetails['McDbCircle'];
- for (let i = 0; i < circleObjects.length; i++) {
- const element = circleObjects[i];
- let _circle = (element.entity as McDbCircle).clone() as McDbCircle;
- _circle.move(this.formPt, this.toPt);
- _circle.rotate(this.toPt, angle);
- const center = _circle.center;
- const radius = _circle.radius;
- const indexArr: number[] = [];
- const mCiecleArr = ents.filter((item: McDbCircle, index: number) => {
- const _center = item.center;
- const _radius = item.radius;
- const r = Math.abs(_radius - radius) < this.dTol && center.distanceTo(_center) < this.dTolPt;
- if (r) {
- indexArr.push(index)
- }
- return r;
- });
- if (mCiecleArr.length > 0) {
- num += 1;
- ents.splice(indexArr[0], 1);
- ents = [...ents];
- } else {
- break;
- }
- }
- };
- if (calssNames.includes('McDbBlockReference')) {
- /** 平移+旋转=>比对包围盒大小+块名字 */
- let ents = objects['McDbBlockReference'];
- const blkObjects = this.objectsDetails['McDbBlockReference'];
- for (let i = 0; i < blkObjects.length; i++) {
- const element = blkObjects[i];
- let _blk = (element.entity as McDbBlockReference).clone() as McDbBlockReference;
- _blk.move(this.formPt, this.toPt);
- _blk.rotate(this.toPt, angle);
- const blkName = _blk.blockName;
- const { minPt: blkMinPt, maxPt: blkMaxPt } = this.getBlkMidPt(_blk);
- const indexArr: number[] = [];
- const mArcArr = ents.filter((item: McDbBlockReference, index: number) => {
- const _blkName = item.blockName;
- if (_blkName === blkName) {
- if (this.classNames.length === 1) {
- indexArr.push(index);
- return true
- } else {
- const { minPt: _blkMinPt, maxPt: _blkMaxPt } = this.getBlkMidPt(item);
- let r1 = blkMinPt.distanceTo(_blkMinPt) < this.dTolPt && blkMaxPt.distanceTo(_blkMaxPt) < this.dTolPt;
- if (r1) {
- indexArr.push(index);
- }
- return r1
- }
- }
- });
- if (mArcArr.length > 0) {
- num += 1;
- ents.splice(indexArr[0], 1);
- ents = [...ents];
- } else {
- return;
- }
- }
- }
- if (calssNames.includes('McDbPolyline')) {
- /** 平移+旋转=>比对凸度+点位置 */
- let ents = objects['McDbPolyline'];
- const plObjects = this.objectsDetails['McDbPolyline'];
- for (let i = 0; i < plObjects.length; i++) {
- const element = plObjects[i];
- let _poly = (element.entity as McDbPolyline).clone() as McDbPolyline;
- _poly.move(this.formPt, this.toPt);
- _poly.rotate(this.toPt, angle);
- const { lengthArr, bugleArr, vertNum } = this.getPlDetails(_poly);
- const indexArr: number[] = [];
- const mPlArr = ents.filter((item: McDbPolyline, index: number) => {
- const _length = item.getLength().val;
- if (Math.abs(_length - element.length) < this.dTol && _poly.isClosed === _poly.isClosed) {
- const { lengthArr: _lengthArr, bugleArr: _bugleArr, vertNum: _vertNum } = this.getPlDetails(item);
- const revBugleArr = _bugleArr.map(item => item === 0 ? item : -item);
- const r1 = lengthArr.toString() === _lengthArr.toString() && bugleArr.toString() === _bugleArr.toString();
- let r2 = false;
- if (!r1) {
- r2 = lengthArr.toString() === [..._lengthArr].reverse().toString() && bugleArr.toString() === [...revBugleArr].reverse().toString();
- }
- const r3 = vertNum === _vertNum;
- if ((r1 || r2) && r3) {
- let _num = 0;
- for (let i = 0; i < vertNum; i++) {
- const pt = _poly.getPointAt(i).val;
- const width = _poly.getWidthsAt(i);
- const _pt = r2 ? item.getPointAt(vertNum - 1 - i).val : item.getPointAt(i).val;
- const _width = r2 ? item.getWidthsAt(vertNum - 1 - i) : item.getWidthsAt(i);
- if (pt.distanceTo(_pt) < this.dTolPt && width.val1 === _width.val1 && width.val2 === _width.val2) {
- _num += 1
- } else {
- // 两个点且反向的情况
- if (vertNum === 2 && i === 0) {
- const _pt1 = item.getPointAt(0).val;
- const _pt2 = item.getPointAt(1).val;
- const _width = item.getWidthsAt(0);
- const pt2 = _poly.getPointAt(1).val;
- if (pt2.distanceTo(_pt2) < this.dTolPt && pt.distanceTo(_pt1) < this.dTolPt && width.val1 === _width.val2 && width.val2 === _width.val1) {
- _num += 2;
- }
- }
- }
- };
- if (_num === vertNum) {
- indexArr.push(index);
- }
- return _num === vertNum;
- }
- }
- });
- if (mPlArr.length > 0) {
- num += 1;
- ents.splice(indexArr[0], 1);
- ents = [...ents];
- } else {
- break;
- }
- }
- }
- if (num === this.objectCount) {
- // 匹配成功
- const pt = minPt.clone().addvec(maxPt.clone().sub(minPt).normalize().mult(minPt.distanceTo(maxPt) / 2));
- const res = this.graphBoxsPos.filter(point => pt.distanceTo(point) < this.dTolPt);
- if (!res.length) {
- this.graphBoxsPos.push(pt)
- }
- };
- this.patternList.graphBoxsPos = [...this.graphBoxsPos];
- }
- // 识别包围盒是否符合要求
- private identificationBBox = (minPt: McGePoint3d, maxPt: McGePoint3d, angle: number): any => {
- const _ss = new MxCADSelectionSet()
- _ss.crossingSelect(minPt.x, minPt.y, maxPt.x, maxPt.y);
- const boxEntity = {};
- _ss.forEach(id => {
- const ent = id.getMcDbEntity();
- if (!boxEntity[ent.objectName]) boxEntity[ent.objectName] = [];
- boxEntity[ent.objectName].push(ent);
- });
- let r = this.classNames.filter(name => boxEntity[name] && this.selectObjects[name].length <= boxEntity[name].length);
- if (r.length === this.classNames.length) {
- this.comparisonPhysical(boxEntity, maxPt, minPt, angle);
- }
- }
- };
调用 SearchSamePattern 类,实现图形识别功能,代码如下: - /** 获取需要识别的图形 */
- const getIdentificationPattern = async () => {
- // 获取需要识别的图形
- const ss = new MxCADSelectionSet();// 选择集
- const filter = new MxCADResbuf([DxfCode.kEntityType, "LINE,ARC,CIRCLE,LWPOLYLINE,INSERT"])
- if (!await ss.userSelect("请点击左键或拉框选择需要识别的图形:", filter)) return;
- if (ss.count() == 0) return;
- // 搜索图形
- const searchPattern = new SearchSamePattern();
- // 搜索图形简图地址
- const patternImgUrl = await searchPattern.setSelectset(ss);
- if (!patternImgUrl.value) return;
- // 获取识别结果
- const searchList = searchPattern.identifyGraphics();
- console.log(searchList);
- }
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