/// <summary>
/// 由角点、长度、宽度和高度在UCS中创建楔体
/// </summary>
/// <param name="cornerPt">角点</param>
/// <param name="lengthAlongX">长度</param>
/// <param name="lengthAlongY">宽度</param>
/// <param name="lengthAlongZ">高度</param>
/// <returns>返回创建的楔体的Id</returns>
public static ObjectId AddWedge(Point3d cornerPt, double lengthAlongX,
double lengthAlongY, double lengthAlongZ)
{
Database db = HostApplicationServices.WorkingDatabase;
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
if (Math.Abs(lengthAlongX) < 0.00001 || Math.Abs(lengthAlongX) < 0.00001 || Math.Abs(lengthAlongX) < 0.00001)
{
ed.WriteMessage("\n参数不当,创建楔体失败！");
return(ObjectId.Null);
}
Solid3d ent = new Solid3d();
ent.RecordHistory = true;
ent.CreateWedge(Math.Abs(lengthAlongX), Math.Abs(lengthAlongY), Math.Abs(lengthAlongZ));
// 位置调整
Point3d cenPt = cornerPt + new Vector3d(0.5 * lengthAlongX, 0.5 * lengthAlongY, 0.5 * lengthAlongZ);
Matrix3d mt = ed.CurrentUserCoordinateSystem;
mt = mt * Matrix3d.Displacement(cenPt - Point3d.Origin);
ent.TransformBy(mt);
ObjectId entId = ObjectId.Null;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
entId = db.AddToModelSpace(ent);
tr.Commit();
}
return(entId);
}
// 由中心点、长度、宽度和高度创建楔体的函数.
public static ObjectId AddWedge(Point3d cenPt, double lengthAlongX, double lengthAlongY, double lengthAlongZ)
{
Solid3d ent = new Solid3d();
ent.CreateWedge(lengthAlongX, lengthAlongY, lengthAlongZ);
Matrix3d mt = Matrix3d.Displacement(cenPt - Point3d.Origin);
ent.TransformBy(mt);
ObjectId entId = AppendEntity(ent);
return(entId);
}
public static void CreateWedge()
{
// 获取当前文档和数据库，启动事务
var acDoc = Autodesk.AutoCAD.ApplicationServices.Core.Application.DocumentManager.MdiActiveDocument;
var acCurDb = acDoc.Database;
using (var acTrans = acCurDb.TransactionManager.StartTransaction())
{
// 以读模式打开块表
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable;
// 以写模式打开块表记录模型空间
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
OpenMode.ForWrite) as BlockTableRecord;
//创建3D楔形实体wedge
var acSol3D = new Solid3d();
acSol3D.CreateWedge(10, 15, 20);
// 3D实体的中心点放在(5,5,0)
acSol3D.TransformBy(Matrix3d.Displacement(new Point3d(5, 5, 0) - Point3d.Origin));
// 将新对象添加到块表记录和事务
acBlkTblRec.AppendEntity(acSol3D);
acTrans.AddNewlyCreatedDBObject(acSol3D, true);
// 打开当前视口
ViewportTableRecord acVportTblRec;
acVportTblRec = acTrans.GetObject(acDoc.Editor.ActiveViewportId,
OpenMode.ForWrite) as ViewportTableRecord;
// 旋转当前视口的观察方向
acVportTblRec.ViewDirection = new Vector3d(-1, -1, 1);
acDoc.Editor.UpdateTiledViewportsFromDatabase();
// 提交事务
acTrans.Commit();
}
}
