使用Teigha.net读取CAD的常用功能模块
Teigha中实体旋转
代码：
using (var trans = database.TransactionManager.StartTransaction())
{
Entity ent = trans.GetObject(entityId, OpenMode.ForWrite) asEntity;
if (ent != null )
{
Extents3d exts = ent.GeometricExtents;
Point3d poCenter = newPoint3d((exts.MinPoint.X + exts.MaxPoint.X) / 2, (exts.MinPoint.Y + exts.MaxPoint.Y) / 2, 0);
Matrix3d Matr4 = Matrix3d.Rotation((30 * Math.PI / 180),Vector3d.ZAxis, poCenter);
ent.TransformBy(Matr4);
}
trans.Commit();
}
//以实体的外接矩形的中心点为圆心旋转30度。
Teigha中跳转至显示视图跳转到某点，并以此为圆心显示内容
代码：
using (var trans = database.TransactionManager.StartTransaction())
{
Point3d EndPoint=new Point3d(0,0,0);
using (Teigha.GraphicsSystem.View pView = helperDevice.ActiveView)
{
pView.Dolly(EndPoint.X - pView.Position.X, EndPoint.Y - pView.Position.Y, 0);
}
trans.Commit();
}
if (helperDevice != null)
helperDevice.Update();
Invalidate();
Teigha 窗体内容的旋转
代码：
if (helperDevice != null)
{
using (Teigha.GraphicsSystem.View pView = BaseF.helperDevice.ActiveView)
{
//2为指定的角度
pView.Roll(2 * Math.PI / 180);
Invalidate();
}
helperDevice.Update();
helperDevice.Invalidate();
}
Invalidate();
Teigha 直接将块中内容导入其他块中（适用于不同dwg文件的导入）
代码：
Database databa = newDatabase(false, false);
databa.ReadDwgFile(@"C:\Users\admin\Desktop\安装略图.dwg", FileOpenMode.OpenForReadAndAllShare, false, "");
using (var trans = database.TransactionManager.StartTransaction())
{
BlockTable block = database.BlockTableId.GetObject(OpenMode.ForWrite) asBlockTable;
using (var tran = databa.TransactionManager.StartTransaction())
{
BlockTable blockold = databa.BlockTableId.GetObject(OpenMode.ForWrite) asBlockTable;
database.Insert("需要导入的块名称", databa, false);
database.Insert( "需要导入的块名称"，“重新创建一个新的名字”, databa, false);
}
trans.Commit();
}
Teigha 获取文档中包含的字体样式（主要用于计算机不包含CAD字体时）
//修改字体后需要刷新内容，最好是来回切换布局！
代码：
List<string> StrList = newList<string>();
using (var trans = BaseF.database.TransactionManager.StartTransaction())
{
using (TextStyleTable txtstyles = (TextStyleTable)trans.GetObject(BaseF.database.TextStyleTableId, OpenMode.ForRead))
{
string exCADlow = “.eot,.eot,.otf,.fon,.font,.ttf,.ttc,.woff,.woff2,.shx”；
foreach (ObjectId item in txtstyles)
{
using (TextStyleTableRecord txtse = (TextStyleTableRecord)trans.GetObject(item, OpenMode.ForRead))
{
if (exCADlow.Contains(Path.GetExtension(txtse.FileName).ToLower()) && Path.GetExtension(txtse.FileName).ToLower() != "")
{
StrList.Add(txtse.FileName);
}
}
}
}
Teigha 实现移动视图的效果
//根据按下和移动时的鼠标坐标移动窗体显示的CAD内容
代码：
///<summary>
///移动视图
///</summary>
///<param name="PoMove"></param>
privatevoid Viewer_UDLR(Point PoMove)
{
double dx = -(PoMove.X - MouseDowns.X);
double dy = -(PoMove.Y - MouseDowns.Y);
MouseDowns = PoMove;
using (DBObject pVpObj = Aux.active_viewport_id(database).GetObject(OpenMode.ForWrite))
{
AbstractViewportData pAVD = newAbstractViewportData(pVpObj);
Teigha.GraphicsSystem.View pView = pAVD.GsView;
Vector3d vec = newVector3d(dx, dy, 0.0);
vec = vec.TransformBy((pView.ScreenMatrix * pView.ProjectionMatrix).Inverse());
pView.Dolly(vec);
pAVD.SetView(pView);
pAVD.Dispose();
pVpObj.Dispose();
Invalidate();
}
}
Teigha 移动实体所在位置
代码：
///<summary>
///移动实体
///</summary>
///<param name="PoMove"></param>
privatevoid MoverEntity_view(Point PoMove)
{
Point3d Podown1 = toEyeToWorld(MouseDowns.X, MouseDowns.Y);
Point3d Pomove1= toEyeToWorld(PoMove.X, PoMove.Y);
double dx = Pomove1.X - Podown1.X;
double dy = Pomove1.Y - Podown1.Y;
MouseDowns = PoMove;
List<ObjectId> Listitem = newList<ObjectId>();
using (var trans = database.TransactionManager.StartTransaction())
{
foreach (ObjectId item in SelectID)
{
if (Listitem.FindIndex(s1 => s1 == item) == -1)
{
Listitem.Add(item);
using (Entity Ent = item.GetObject(OpenMode.ForWrite) asEntity)
{
PoDowns = newPoint3d(PoDowns.X + dx, PoDowns.Y + dy,0);
Point3d Pointnew = newPoint3d(dx, dy, 0);
Matrix3d mat = Matrix3d.Displacement(Pointnew.GetAsVector());
Ent.TransformBy(mat);
}
}
}
trans.Commit();
}
Listitem.Clear();
if (helperDevice != null)
helperDevice.Update();
