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关于objectArx /CAD二次开发中“绘制点、线、圆、圆弧、多段线、矩形、文字等[code]使用CAD软件绘图时，所有的图元均可由点、线、圆、圆弧、多段线、文字等构成，使用objectArx绘制图元时可调用相应的接口函数，如AcDbLine绘制直线。
1.绘制点
参数:pt（点的位置）
AcDbPoint* CreatePoint(const AcGePoint3d& pt)
{
AcDbPoint* pPt = new AcDbPoint(pt);
return pPt;
}
2.绘制直线
参数:ptStart（直线起点），ptEnd（直线终点）
AcDbLine* yEntity::CreateLine(const AcGePoint3d& ptStart, const AcGePoint3d& ptEnd)
{
AcDbLine* pLine = new AcDbLine(ptStart, ptEnd);
return pLine;
}
3.绘制圆
参数:ptCenter（圆心位置），dRadius（半径）
AcDbCircle* CreateCircle(const AcGePoint3d& ptCenter, double dRadius)
{
AcDbCircle* pCircle = new AcDbCircle(ptCenter, AcGeVector3d(0, 0, 1), dRadius);
return pCircle;
}
4.圆弧
三点画弧
参数:ptStart（圆弧起点），ptOnArc（圆弧上一点），ptEnd（圆弧终点）
AcDbArc* CreateArc(const AcGePoint3d& ptStart, const AcGePoint3d& ptOnArc, const AcGePoint3d& ptEnd)
{
// 使用几何类获得圆心、半径;
AcGeCircArc2d geArc(ptStart.convert2d(AcGePlane::kXYPlane), ptOnArc.convert2d(AcGePlane::kXYPlane), ptEnd.convert2d(AcGePlane::kXYPlane));
AcGePoint2d ptCenter = geArc.center();
double radius = geArc.radius();
// 计算起始和终止角度;
AcGeVector2d vecStart(ptStart.x - ptCenter.x, ptStart.y - ptCenter.y);
AcGeVector2d vecEnd(ptEnd.x - ptCenter.x, ptEnd.y - ptCenter.y);
double startAngle = vecStart.angle();
double endAngle = vecEnd.angle();
AcDbArc* pArc = new AcDbArc(AcGePoint3d(ptCenter.x, ptCenter.y, 0), radius, startAngle, endAngle);
return pArc;
}
圆心、起点，端点画弧
参数:ptStart（圆弧起点），ptCenter（圆心），ptEnd（圆弧终点）
两空间直线求交点，fortran编制
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AcDbArc* yEntity::CreateArcByPt2(const AcGePoint3d& ptCenter, const AcGePoint3d& ptStart,
const AcGePoint3d& ptEnd)
{
// 计算半径;
double radius = ptCenter.distanceTo(ptStart);
// 计算起始和终止角度;
AcGeVector2d vecStart(ptStart.x - ptCenter.x, ptStart.y - ptCenter.y);
AcGeVector2d vecEnd(ptEnd.x - ptCenter.x, ptEnd.y - ptCenter.y);
double startAngle = vecStart.angle();
double endAngle = vecEnd.angle();
AcDbArc* pArc = new AcDbArc(ptCenter, radius, startAngle, endAngle);
return pArc;
}
半径、起点，端点画弧
参数:ptStart（圆弧起点），dRadius（半径），ptEnd（圆弧终点）
AcDbArc* yEntity::CreateArc(const AcGePoint3d& ptStart, const AcGePoint3d& ptEnd, double dRadius)
{
AcGeCircArc2d geCircle1(ptStart.convert2d(AcGePlane::kXYPlane), dRadius);
AcGeCircArc2d geCircle2(ptEnd.convert2d(AcGePlane::kXYPlane), dRadius);
AcGePoint3dArray arrptInter;
int nNum = 0;
bool bRet = yGeometry::GetIntersectPoint(geCircle1, geCircle2, nNum, arrptInter);
if (!bRet)
return NULL;
AcGePoint3d ptCenter; //圆心点
if (1 == nNum)
{
AcGePoint3d pt = arrptInter[0];
// 计算起始和终止角度;
AcGeVector2d vecStart(ptStart.x - pt.x, ptStart.y - pt.y);
AcGeVector2d vecEnd(ptEnd.x - pt.x, ptEnd.y - pt.y);
double startAngle = vecStart.angle();
double endAngle = vecEnd.angle();
double dBulge = yEntity::GetArcBulge(startAngle, endAngle);
if (0 > dBulge)
return NULL;
ptCenter = pt;
}
else if (2 == nNum)
{
AcGePoint3d pt1 = arrptInter[0];
AcGePoint3d pt2 = arrptInter[1];
// 计算起始和终止角度;
AcGeVector2d vecStart(ptStart.x - pt1.x, ptStart.y - pt1.y);
AcGeVector2d vecEnd(ptEnd.x - pt1.x, ptEnd.y - pt1.y);
double startAngle = vecStart.angle();
double endAngle = vecEnd.angle();
double dBulge = yEntity::GetArcBulge(startAngle, endAngle);
if (0 > dBulge)
{
vecStart = AcGeVector2d(ptStart.x - pt2.x, ptStart.y - pt2.y);
vecEnd = AcGeVector2d(ptEnd.x - pt2.x, ptEnd.y - pt2.y);
startAngle = vecStart.angle();
endAngle = vecEnd.angle();
dBulge = yEntity::GetArcBulge(startAngle, endAngle);
if (0 > dBulge)
return NULL;
ptCenter = pt2;
}
else
{
ptCenter = pt1;
}
}
// 计算起始和终止角度;
AcGeVector2d vecStart(ptStart.x - ptCenter.x, ptStart.y - ptCenter.y);
AcGeVector2d vecEnd(ptEnd.x - ptCenter.x, ptEnd.y - ptCenter.y);
double startAngle = vecStart.angle();
double endAngle = vecEnd.angle();
AcDbArc* pArc = new AcDbArc(ptCenter, dRadius, startAngle, endAngle);
return pArc;
}
5.多段线
参数:ptArr（点集）
AcDbPolyline* yEntity::CreatePolyline(const AcGePoint3dArray& ptArr)
{
if (ptArr.length() < 2)
return NULL;
AcGePoint2dArray pt2ds;
for (int i = 0; i < ptArr.length(); i++)
pt2ds.append(ptArr[i].convert2d(AcGePlane::kXYPlane));
//创建多段线
AcDbPolyline* pPoly = new AcDbPolyline();
for (int i = 0; i < pt2ds.length(); ++i)
pPoly->addVertexAt(i, pt2ds[i]);
return pPoly;
}
6.矩形
注意:矩形对角点由用户输入
AcDbObjectId yEntity::MakeRecktangle()
{
AcDbPolyline *pPline = new AcDbPolyline(4);
AcGePoint3d pt[5];
acedGetPoint(NULL, _T("\n请指定区域第一点"), asDblArray(pt[0]));
pt[2] = yEntity::RelativePt(pt[0], 10, -10);
pt[1].x = pt[0].x;
pt[1].y = pt[2].y;
pt[3].x = pt[2].x;
pt[3].y = pt[0].y;
pt[4] = pt[0];
for (int i = 0; i < 5; i++)
{
AcGePoint2d point;
point.x = pt[i].x;
point.y = pt[i].y;
pPline->addVertexAt(i, point);
}
AcDbObjectId objId = yDataBase::addToModelSpace(pPline);
int nRs;
int track = 1, type;
struct resbuf result;
acutPrintf(_T("\n请指定区域另一点"));
while (track > 0)
{
AcGePoint3d PT;
nRs = acedGrRead(track, &type, &result);
PT.x = result.resval.rpoint[X];
PT.y = result.resval.rpoint[Y];
AcDbPolyline *pPLine;
Acad::ErrorStatus es = acdbOpenObject(pPLine, objId, AcDb::kForWrite);
if (es != Acad::eOk)
return objId;
pt[1].y = PT.y;
pt[3].x = PT.x;
pt[2] = PT;
for (int i = 0; i < 5; i++)
{
AcGePoint2d point;
point.x = pt[i].x;
point.y = pt[i].y;
pPLine->setPointAt(i, point);
}
if (nRs != RTNORM)
{
pPLine->erase();
pPLine->close();
return objId;
}
if (type == 2)
{
track = 0;
}
if (type == 3)
{
track = 0;
}
pPLine->close();
}
return objId;
}
7.文字
实例 textId = InsertMText(AcGePoint3d(0,0,0), _T(“0”), _T(“ONEZERO”), 0.9*relHeight, AcDbMText::kBottomLeft, 1);
AcDbObjectId yEntity::InsertMText(
const AcGePoint3d& ptInsert,//插入点
CString Text,//文本
CString style,//文字风格
double height,//文字高度
AcDbMText::AttachmentPoint Attachment,//文字对齐方式
int colorIndex//文字颜色
)
{
AcDbMText* pMText = new AcDbMText;
//设置多行文字属性
pMText->setTextHeight(height);
pMText->setLocation(ptInsert);
pMText->setContents(Text);
pMText->setAttachment(Attachment);
pMText->setColorIndex(colorIndex);
pMText->setTextStyle(yEntity::GetTextStyleId(style));
//添加到模型空间
AcDbObjectId idMText = yDataBase::addToModelSpace(pMText);
pMText->close();
return idMText;
}
原文链接：https://blog.csdn.net/weixin_42796921/article/details/122077787[/code] |
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发表于 2024-6-22 09:46:18
