/// <summary>
/// 由底面中心点、高度、棱数和底面外接圆半径在UCS中创建棱柱
/// </summary>
/// <param name="bottomCenPt">底面中心点</param>
/// <param name="height">高度</param>
/// <param name="sides">棱数</param>
/// <param name="radius">底面外接圆半径</param>
/// <returns>返回创建的棱柱的Id</returns>
public static ObjectId AddPrism(Point3d bottomCenPt, double height, int sides, double radius)
{
Database db = HostApplicationServices.WorkingDatabase;
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
if (Math.Abs(height) < 0.00001 || radius < 0.00001 || sides < 3 || sides > 32)
{
ed.WriteMessage("\n参数不当,创建棱柱失败！");
return(ObjectId.Null);
}
// 创建
Solid3d ent = new Solid3d();
ent.RecordHistory = true;
ent.CreatePyramid(Math.Abs(height), sides, radius, radius);
// 位置调整
Point3d cenPt = bottomCenPt + new Vector3d(0.0, 0.0, 0.5 * height);
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);
}
public void Create3DBox()
{
Solid3d bbb = new Solid3d();
bbb.CreatePyramid(50, 3, 50, 0);
bbb.Color = Autodesk.AutoCAD.Colors.Color.FromRgb(0, 250, 0);
ToModelSpace(bbb);
Solid3d bbbb = new Solid3d();
bbbb.CreateSphere(50);
// Move(bbbb, new Point3d(-50, -50, -50));
ToModelSpace(bbbb);
}
