AutoCAD 2010的C＃实体放样示例——天圆地方

ahlzl · 发表于 2009-5-20 07:40:00

2010的那两个托管DLL文件中，增加了对“放样”和“扫琼”的支持，使得我们用C＃进行三维建模的手段更加丰富了！
以前的CAD版本，用C＃能进行“放样曲面”和“扫琼曲面”的操作，但不能进行实体的操作。

// 放样示例：天圆地方.
[CommandMethod("Test")]
public void Test()
{
    Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
    Polyline ent1 = new Polyline();
    ent1.AddVertexAt(0, new Point2d(50, 50), 0, 0, 0);
    ent1.AddVertexAt(1, new Point2d(-50, 50), 0, 0, 0);
    ent1.AddVertexAt(2, new Point2d(-50, -50), 0, 0, 0);
    ent1.AddVertexAt(3, new Point2d(50, -50), 0, 0, 0);
    ent1.Closed = true;
    Circle ent2 = new Circle(new Point3d(0, 0, 200), new Vector3d(0, 0, 1), 30);
    Entity[] crossEnts = new Entity[2];
    crossEnts.SetValue(ent1, 0);
    crossEnts.SetValue(ent2, 1);
    Entity[] guideCurs = new Entity[0];
    LoftOptions loftOpt = new LoftOptions();
    Solid3d solid3dEnt = new Solid3d();
    solid3dEnt.RecordHistory = true;
    solid3dEnt.CreateLoftedSolid(crossEnts, guideCurs, null, loftOpt);
    AppendEntity(solid3dEnt);
}
ObjectId AppendEntity(Entity ent)
{
    Database db = HostApplicationServices.WorkingDatabase;
    ObjectId entId;
    using (Transaction trans = db.TransactionManager.StartTransaction())
    {
        BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId,
            OpenMode.ForRead);
        BlockTableRecord btr = (BlockTableRecord)trans.GetObject
            (bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
        entId = btr.AppendEntity(ent);
        trans.AddNewlyCreatedDBObject(ent, true);
        trans.Commit();
    }
    return entId;
}