In Teigha Mechanical, HoleChartOrigin is a part of the HoleChart complex entity. Creation of HoleChartOrigin is the first thing to do to make all components of HoleChart work correctly.
Complex graphic scenes with a large number of elements are sometimes drawn slowly. In this case, dynamic graphic elements (such as cursors, grip/snap points, selection rectangles, user interface elements, and so on) are drawn slowly too because to correctly combine graphic scenes and dynamic graphic elements, the renderer must redraw all underlying scene elements.
Many elements in Teigha BIM contain B-Rep geometries in GElement, which is a geometry cache of an element. However, B-Rep is not a universal format. Each product has a specific representation of B-Reps.
An overview of B-Reps and BIM specifics can be found in the documentation (login required).
Table elements for .dgn files are supported by Bentley® MicroStation V8i Connect Edition and later. The structure and purpose of .dgn table elements are similar to .dwg table elements. A table is a set of cells arranged in rows and columns. The cells in a table are separated by gridlines, and .dgn table element cells can contain only text data.
To create a .dgn table element:
In Teigha Architecture, objects can be attached to other objects. Such connections are handled by special anchor objects which are stored in a .dwg file just like any other object. An anchor is represented by the base class AECDbAnchor. The meaning of the connection between objects can be different: for example, windows are inserted in a wall, or a schedule table is attached to an object.