标签：没有 lag his read trace 属性 选择 lse for
测试结果：这个是按0.1,0.1,0.1,0.3,0.4的比例划分的。
插件描述：这个插件主要是选择一个多段线poly，设置poly的close属性为true，在poly任意一侧画一条长线line（line画的时候不能与poly相交），找到line的垂直向量p‘yXl，这个pyXl是要往与poly能相交的方向。在找到这个line与poly相切的时候。然后取每次平移的步进值bujin，因为这个poly的总面积有大有小，所以我是取总面积totaArea/2000在开方，如果这个bujin<=1,则直接取1，这样对于面积很大的poly也不需要平移很多次。然后就是利用acedTraceBoundary函数来获取平移后的
切线与poly形成的封闭多段线pl，求这个pl的面积是否大与按比例分割后的面积。
需要注意的地方：在使用acedTraceBoundary的时候，必须确认poly和平移的切线都是close掉的，不然无法求出pl。如果没有acedTraceBoundary函数，可以这样：
//ads_point pt = { seedPoint.x,seedPoint.y,seedPoint.z }; //acedCommandS(RTSTR, L"-boundary", RTPOINT, pt, RTSTR, L"", RTNONE); //acdbEntLast(pent); ////acedRedraw(pent, 3); //AcDbObjectId eId; //acdbGetObjectId(eId, pent); //AcDbPolyline * pEnt = NULL; //ErrorStatus es = acdbOpenObject(pEnt, eId, AcDb::OpenMode::kForWrite);
来获得封闭的多段线，然后在求面积。
下面给出详细代码:
求pyXl：
AcGeVector3d CAreaFenGe::GetDirection() { //l2pt和l1pt是在poly侧边画的线的端点 AcGeVector3d lineDirc = l2Pt - l1Pt; AcGeVector3d lineDirc2 = l2Pt - l1Pt; AcGePoint3d centerPt((l2Pt.x + l1Pt.x) / 2, (l2Pt.y + l1Pt.y) / 2, 0); AcGePoint3d ptCloset; poly->getClosestPointTo(centerPt, ptCloset, false); AcDbLine *line1 = AcDbLine::cast(line->clone()); AcDbLine *line2 = AcDbLine::cast(line->clone()); double len = ptCloset.distanceTo(centerPt); AcGeVector3d pyXl1 = lineDirc.rotateBy(-1 * CMathUtil::PI() / 2, AcGeVector3d::kZAxis); AcGeVector3d pyXl2 = lineDirc2.rotateBy(CMathUtil::PI() / 2, AcGeVector3d::kZAxis); line1->transformBy(AcGeMatrix3d::translation(pyXl1.normal()*len*1.5)); line2->transformBy(AcGeMatrix3d::translation(pyXl2.normal()*len*1.5)); AcGePoint3dArray p3dArr1, p3dArr2; poly->intersectWith(line1, AcDb::Intersect::kExtendArg, p3dArr1, 0, 0); poly->intersectWith(line2, AcDb::Intersect::kExtendArg, p3dArr2, 0, 0); if (p3dArr1.length() > 0) { pyXl = pyXl1; } else if(p3dArr2.length()>0){ pyXl = pyXl2; } else { pyXl = AcGeVector3d(3, -1, 0);//这个可以注释掉 } delete line1; line1 = NULL; delete line2; line2 = NULL; return pyXl; }
获得切线:
//得到切线 AcGePoint3d CAreaFenGe::GetQieDian(AcDbLine * &line1) { line1 = new AcDbLine(l1Pt, l2Pt); AcGePoint3dArray ptArr; while (ptArr.length() < 1) { poly->intersectWith(line1, AcDb::Intersect::kOnBothOperands, ptArr, 0, 0); line1->transformBy(AcGeMatrix3d::translation(pyXl.normal() * 1)); } poly->close(); if (ptArr.length() > 0) return ptArr[0]; else return AcGePoint3d::kOrigin; }
得到面积:
bool CAreaFenGe::GetPyPolyline(AcGePoint3d seedPoint, double & a) { AcDbVoidPtrArray ptrArr; ErrorStatus es = acedTraceBoundary(seedPoint, false, ptrArr); if (es != Acad::eOk) { acutPrintf(L"\nboundary=%d", es); return false; } AcDbPolyline * pl = NULL; pl = (AcDbPolyline*)ptrArr[0]; pl->setColorIndex(1); pl->getArea(a); pl->erase(); pl->close(); pl = NULL; return true; }
主要步骤：
void CAreaFenGe::Command() { ErrorStatus es; AcDbLine * lQieXian = NULL; AcGePoint3d ptQieDian = GetQieDian(lQieXian); acutPrintf(L"\nptQieDian=[%.2f,%.2f,%.2f]", ptQieDian.x, ptQieDian.y, ptQieDian.z); ptQieDian=ptQieDian.transformBy(AcGeMatrix3d::translation(pyXl.normal() * 5)); acutPrintf(L"\nptQieDian2=[%.2f,%.2f,%.2f]", ptQieDian.x, ptQieDian.y, ptQieDian.z); if (ptQieDian.x == 0 && ptQieDian.y == 0) { return; } double bujin = sqrt(totalArea * 1 / 2000); if (bujin <= 1) { bujin = 1; } AcDbObjectId qxId; lQieXian->transformBy(AcGeMatrix3d::translation(pyXl.normal() * bujin*3)); es = acdbOpenObject(poly, plId, AcDb::kForRead); AcGePoint3dArray ptJdArr; poly->intersectWith(lQieXian, AcDb::Intersect::kOnBothOperands, ptJdArr, 0, 0); if (ptJdArr.length() >= 2) { ptQieDian=AcGePoint3d((ptJdArr[0].x+ ptJdArr[1].x)/2, (ptJdArr[0].y + ptJdArr[1].y) / 2,0); ptQieDian= ptQieDian.transformBy(AcGeMatrix3d::translation(pyXl.normal() * -bujin*1.5)); } poly->close(); qxId = CDwgDataBaseUtil::PostToModelSpace(lQieXian); lQieXian->close(); lQieXian = NULL; //AcDbPolyline * ptPy = new AcDbPolyline(); //ptPy->setColorIndex(5); //AcDbObjectId ptId; AcGePoint3dArray ptJdArr2; for (int i = 0; i < (int)vecArea.size(); i++) { AcGePoint3d ptCopyQd = ptQieDian; double a = 0.0; while (a < vecArea[i]) { bool flag = GetPyPolyline(ptQieDian, a); if (!flag) { return; } es = acdbOpenObject(lQieXian, qxId, AcDb::kForWrite); lQieXian->transformBy(AcGeMatrix3d::translation(pyXl.normal() * bujin)); ptJdArr2.removeAll(); es = acdbOpenObject(poly, plId, AcDb::kForRead); poly->intersectWith(lQieXian, AcDb::Intersect::kExtendArg, ptJdArr2, 0, 0); poly->close(); if (ptJdArr2.length() < 1) { lQieXian->close(); break; } lQieXian->close(); } acdbOpenObject(lQieXian, qxId, AcDb::kForWrite); es = acdbOpenObject(poly, plId, AcDb::kForRead); ptJdArr.removeAll(); poly->intersectWith(lQieXian, AcDb::Intersect::kExtendArg, ptJdArr, 0, 0); AcGePoint3d preCenter; if (ptJdArr.length() >= 2) { AcDbLine* lFg = new AcDbLine(ptJdArr[0], ptJdArr[1]); preCenter = AcGePoint3d((ptJdArr[0].x + ptJdArr[1].x) / 2, (ptJdArr[0].y + ptJdArr[1].y) / 2, 0); lFg->setColorIndex(2); CDwgDataBaseUtil::PostToModelSpace(lFg); lFg->close(); } else { poly->close(); lQieXian->erase(); lQieXian->close(); lQieXian = NULL; //ptId = CDwgDataBaseUtil::PostToModelSpace(ptPy); return; } poly->close(); AcDbPolyline *pCopyQx = (AcDbPolyline*)lQieXian->clone(); pCopyQx->transformBy(AcGeMatrix3d::translation(pyXl.normal() *bujin)); if (i != (int)vecArea.size() - 1) { es = acdbOpenObject(poly, plId, AcDb::kForRead); ptJdArr.removeAll(); poly->intersectWith(pCopyQx, AcDb::Intersect::kExtendArg, ptJdArr, 0, 0); if (ptJdArr.length() >= 2) { ptQieDian = AcGePoint3d((ptJdArr[0].x + ptJdArr[1].x) / 2, (ptJdArr[0].y + ptJdArr[1].y) / 2, 0); ptQieDian = AcGePoint3d((preCenter.x + ptQieDian.x) / 2, (preCenter.y + ptQieDian.y) / 2, 0); } qxId = CDwgDataBaseUtil::PostToModelSpace(pCopyQx); pCopyQx->close(); poly->close(); pCopyQx = NULL; } lQieXian->erase(); lQieXian->close(); lQieXian = NULL; //当运行到最后一个面积时，就不复制了 if (i == (int)vecArea.size() - 1) { delete pCopyQx; pCopyQx = NULL; break; } } /*if (ptId.isNull()) { ptId = CDwgDataBaseUtil::PostToModelSpace(ptPy); ptPy->close(); }*/ }
构造函数：
CAreaFenGe::CAreaFenGe(ACHAR *fenGeStr, AcDbPolyline *&p, AcDbLine *&l) { vector<CString> vec; CStringUtil::Split(W2T(fenGeStr), L",", vec, false); for (int i = 0; i < (int)vec.size(); i++) { vecFenGe.push_back(_wtof(vec.at(i))); } this->poly = p; this->line = l; l1Pt = l->startPoint(); l2Pt = l->endPoint(); if (poly->isClosed() == false) { poly->setClosed(true); } poly->getArea(totalArea); for (int i = 0; i < (int)vecFenGe.size(); i++) { vecArea.push_back(totalArea*vecFenGe.at(i)); acutPrintf(L"%.2f", vecArea[i]); } GetDirection(); plId = poly->objectId(); }
标签：没有 lag his read trace 属性 选择 lse for
原文地址：https://www.cnblogs.com/HelloQLQ/p/12228308.html
