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();