选取对象，wblock 后设定viewtablerecord居中显示
本帖最后由 qq1254582201 于 2021-6-10 15:06 编辑public static class Extension
{
public static void ZoomExtents(this Database db)
{
if (db == null)
throw new ArgumentNullException("db");
if (db.TileMode)
acedVports2VportTableRecords();
else
db.TileMode = true;
db.UpdateExt(false);
using (var tr = db.TransactionManager.StartOpenCloseTransaction())
{
var view = (ViewportTableRecord)tr.GetObject(db.CurrentViewportTableRecordId, OpenMode.ForWrite);
var ratio = view.Width / view.Height;
var ext = new Extents3d(db.Extmin, db.Extmax);
ext.TransformBy(view.WorldToEye());
var lg = ext.MaxPoint.X - ext.MinPoint.X;
var ht = ext.MaxPoint.Y - ext.MinPoint.Y;
if (lg / ht < ratio)
{
view.Height = ht;
view.Width = ht * ratio;
}
else
{
view.Height = lg / ratio;
view.Width = lg;
}
view.CenterPoint = new Point2d(
(ext.MaxPoint.X + ext.MinPoint.X) / 2.0,
(ext.MaxPoint.Y + ext.MinPoint.Y) / 2.0);
tr.Commit();
}
}
public static Matrix3d WorldToEye(this AbstractViewTableRecord view)
{
if (view == null)
throw new ArgumentNullException("view");
return
Matrix3d.WorldToPlane(view.ViewDirection) *
Matrix3d.Displacement(view.Target.GetAsVector().Negate()) *
Matrix3d.Rotation(view.ViewTwist, view.ViewDirection, view.Target);
}
}
楼主，这是可以做块预览那种吗
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