CAD二次开发c#.Net编程 - 工具类集合
创建新图层
public static void CreateLayer(string LayerName)
{
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database;//获取当前数据库
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
//以读的方式打开图层表
LayerTable acLyrTbl = acTrans.GetObject(acCurDb.LayerTableId, OpenMode.ForRead) as LayerTable;
string sLayerName = LayerName;//设定一个图层名称
if (acLyrTbl.Has(sLayerName) == false)
{
using (LayerTableRecord acLyrTblRec = new LayerTableRecord())
{
acLyrTblRec.Name = sLayerName;// 指定图层名称
acLyrTbl.UpgradeOpen();//修改图层打开方式为写
acLyrTbl.Add(acLyrTblRec);//将新图层追加到图层表
acTrans.AddNewlyCreatedDBObject(acLyrTblRec, true);
}
}
acTrans.Commit();
}
}
镜像CAD实体对象
public static Entity MirrorEntity(this ObjectId entId, Point3d point1, Point3d point2, bool isEraseSource)
{
// 声明一个图形对象用于返回
Entity entR;
// 计算镜像的变换矩阵
Matrix3d mt = Matrix3d.Mirroring(new Line3d(point1, point2));
// 打开事务处理
using (Transaction trans = entId.Database.TransactionManager.StartTransaction())
{
// 判断是否删除原对象
if (isEraseSource)
{
// 打开原对象
Entity ent = (Entity)trans.GetObject(entId, OpenMode.ForWrite);
// 执行变换
ent.TransformBy(mt);
entR = ent;
}
else
{
// 打开原对象
Entity ent = (Entity)trans.GetObject(entId, OpenMode.ForRead);
entR = ent.GetTransformedCopy(mt);
}
return entR;
}
}
/// 返回新的图形对象 没有加入图形数据库的情况
public static Entity MirrorEntity(this Entity ent, Point3d point1, Point3d point2, bool isEraseSource)
{
// 声明一个图形对象用于返回
Entity entR;
if (ent.IsNewObject == true)
{
// 计算镜像的变换矩阵
Matrix3d mt = Matrix3d.Mirroring(new Line3d(point1, point2));
entR = ent.GetTransformedCopy(mt);
}
else
{
entR = ent.ObjectId.MirrorEntity(point1, point2, isEraseSource);
}
return entR;
}
CAD ObjectId转换为实体对象
public static DBObject GetDBObject(ObjectId id)
{
Document doc = MgdAcApplication.DocumentManager.MdiActiveDocument;
_ = MgdAcApplication.DocumentManager.MdiActiveDocument.Editor;
using (Transaction trans = doc.TransactionManager.StartTransaction())
{
DBObject pline = trans.GetObject(id, OpenMode.ForRead);//数据库对象可读
trans.Commit();
return pline;
}
}
弧度值转角度值
public static double RadianToDegree(this double angle)
{
return angle * (180.0 / Math.PI);
}
角度值转弧度值
public static double DegreeToRadian(this double angle)
{
return angle * (Math.PI / 180.0);
}
将实体对象添加到模型空间
public static ObjectId AddToModelSpace(this Database db, Entity ent)
{
ObjectId entId;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
BlockTableRecord btr = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
entId = btr.AppendEntity(ent);
tr.AddNewlyCreatedDBObject(ent, true);
tr.Commit();
}
return entId;
}
添加实体到块表记录
public static ObjectId AddBlockTableRecord(this Database db, string blockName, List<Entity> ents)
{
DocumentLock m_DocumentLock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
BlockTable bt = (BlockTable)db.BlockTableId.GetObject(OpenMode.ForRead);
if (!bt.Has(blockName))
{
//创建一个blocktablerecord类的对象，表示要创建的块
BlockTableRecord btr = new BlockTableRecord();
btr.Name = blockName;//设置块名
//将列表中的实体加入到新建的blocktablerecord对象中
ents.ForEach(ent => btr.AppendEntity(ent));
bt.UpgradeOpen();
bt.Add(btr);
db.TransactionManager.AddNewlyCreatedDBObject(btr, true);
bt.DowngradeOpen();
}
m_DocumentLock.Dispose();
return bt[blockName];
}
public static ObjectId AddBlockTableRecord(this Database db, string blockName, params Entity[] ents)
{
return AddBlockTableRecord(db, blockName, ents.ToList());
}
将块定义插入到模型空间
public static ObjectId InsertBlockReference(this ObjectId spaceId, string layer, string blockName, Point3d position, double rotateAngle)
{
ObjectId blockRefId;
Database db = spaceId.Database;//获取数据库对象
BlockTable bt = (BlockTable)db.BlockTableId.GetObject(Autodesk.AutoCAD.DatabaseServices.OpenMode.ForRead);
if (!bt.Has(blockName)) return ObjectId.Null;
DocumentLock m_DocumentLock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
BlockTableRecord space = (BlockTableRecord)spaceId.GetObject(Autodesk.AutoCAD.DatabaseServices.OpenMode.ForWrite);
//创建块参照并设置插入点
BlockReference br = new BlockReference(position, bt[blockName]);
//br.ScaleFactors = sacle;
br.Layer = layer;
br.Rotation = rotateAngle;
blockRefId = space.AppendEntity(br);
//通知事务处理
db.TransactionManager.AddNewlyCreatedDBObject(br, true);
space.DowngradeOpen();
m_DocumentLock.Dispose();
return blockRefId;
}
删除CAD模型空间内当前实体对象
public static bool DelEntity(ObjectId id)
{
try
{
if (!id.IsNull)
{
using (Database db = HostApplicationServices.WorkingDatabase)
{
using (Transaction trans = db.TransactionManager.StartTransaction())
{
Entity entity = (Entity)trans.GetObject(id, OpenMode.ForWrite, true);
entity.Erase(true);
trans.Commit();
}
}
}
else
{
return false;
}
}
catch
{
return false;
}
return true;
}
判断用户当前是否已选择实体
private static void IsSelected()
{
DocumentCollection acDocMgr = Application.DocumentManager;
//激活的文档
Document acDoc = acDocMgr.MdiActiveDocument;
Database acCurDb = acDoc.Database;
using (acDoc.LockDocument())
{
// 启动事务
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// 请求在图形区域选择对象
PromptSelectionResult acSSPrompt = acDoc.Editor.GetSelection();
// 如果提示状态OK，表示已选择对象
if (acSSPrompt.Status == PromptStatus.OK)
{
SelectionSet acSSet = acSSPrompt.Value;
//遍历选择集内的对象
foreach (SelectedObject acSSObj in acSSet)
{
// 确认返回的是合法的SelectedObject对象
if (acSSObj != null)
{
//获取实体
//Entity acEnt = acTrans.GetObject(acSSObj.ObjectId, OpenMode.ForWrite) as Entity;
/*if (acEnt != null)
{
//具体的逻辑代码
}
else
{
MessageBox.Show("该实体为空！", "提示");
}*/
}
}
// 保存新对象到数据库
acTrans.Commit();
}
}
}
}
转载请注明转载地址！